Hybrid Vehicle Control Method, Device, Vehicle and Computer Storage Medium

Abstract

The present application provides a control method, device, vehicle, and computer storage medium for a hybrid vehicle. The control method for the hybrid vehicle includes: obtaining a rapid heating demand signal; according to the rapid heating demand signal, setting the shift logic to a first power load mode to increase or maintain the power load of the engine, setting the heat load logic of the engine to a first heat load mode to increase or maintain the heat load of the engine, controlling the electronic water pump to output a first water pump speed to increase or maintain the speed of the electronic water pump, and controlling the temperature control mechanism to output a first target opening to increase or maintain the opening of the temperature control mechanism. The control method, device, vehicle, and computer storage medium for the hybrid vehicle provided by the present application can quickly provide the supply of warm air for the hybrid vehicle and effectively improve the comfort of the passenger compartment.

Description

Technical Field

[0001] The present application relates to the technical field of hybrid vehicle control, and particularly to a hybrid vehicle control method, device, vehicle and computer storage medium. Background Art

[0002] In order to achieve rapid supply of warm air in cold weather and improve the comfort of the passenger compartment, hybrid vehicles use a gasoline engine water cooling system solution to achieve rapid supply of warm air for the vehicle.

[0003] Currently, the cooling system solutions used in the whole vehicle on the market are usually mechanical water pumps plus thermostats, in which the thermostat is used to adjust the two branches of the radiator large cycle and the bypass small cycle. The warm air branch is generally associated with the bypass small cycle. For this form of cooling system, although the small cycle is always on during cold start and warm air can be supplied in real time, in a low-temperature environment, the engine has not been heated yet, but an additional heat dissipation source of warm air is added, which not only cannot actively achieve rapid engine warm-up, but will further drag down the warm-up speed, and cannot accelerate the rapid temperature rise of the engine in cold regions. Eventually, due to the long duration of gasoline enrichment, the engine oil is diluted. Summary of the Invention

[0004] The present application provides a hybrid vehicle control method, device and computer storage medium for solving the problems of slow engine warm-up speed of the traditional cooling system and easy dilution of engine oil in cold regions in the hybrid mode.

[0005] In one aspect, the present application provides a hybrid vehicle control method. Specifically, the hybrid vehicle control method includes: obtaining a rapid heating demand signal; according to the rapid heating demand signal, setting the shift logic to a first power load mode to increase or maintain the power load of the engine, setting the heat load logic of the engine to a first heat load mode to increase or maintain the heat load of the engine, controlling the electronic water pump to output a first water pump speed to increase or maintain the speed of the electronic water pump, and controlling the temperature control mechanism to output a first target opening degree to increase or maintain the opening degree of the temperature control mechanism.

[0006] Optionally, before the step of obtaining the rapid heating demand signal in the hybrid vehicle control method, it includes: performing a self-check on the cooling system; when the result of the self-check on the cooling system is normal, performing a fault judgment on the water temperature sensor; when the result of the fault judgment on the water temperature sensor is normal, obtaining the rapid heating demand signal; according to the rapid heating demand signal, obtaining the current water temperature for warm air water temperature threshold judgment; when the current water temperature is higher than the warm air water temperature threshold, outputting the rapid heating demand signal.

[0007] Optionally, when the hybrid vehicle control method executes the step of obtaining the fast heating demand signal when the failure determination result of the water temperature sensor is normal, it includes: generating the fast heating demand signal when the ambient temperature is lower than the ambient temperature threshold, the warm air damper opening exceeds the damper threshold, and the current water temperature is lower than the fast heating water temperature threshold.

[0008] Optionally, after the hybrid vehicle control method executes the step of judging the warm air water temperature threshold according to the fast heating demand signal, it includes: reading the engine speed value when the current water temperature is not higher than the warm air water temperature threshold; when the engine speed value is not zero, entering the fast warm-up mode.

[0009] Optionally, the fast warm-up mode of the hybrid vehicle control method is selected from at least one of the minimum flow mode, the zero flow mode, and the On-Off mode.

[0010] Optionally, the value range of the warm air water temperature threshold of the hybrid vehicle control method is 50-65°C.

[0011] Optionally, after the hybrid vehicle control method executes the step of judging the warm air water temperature threshold according to the fast heating demand signal, it includes: reading the engine speed value when the current water temperature is not higher than the warm air water temperature threshold; when the engine speed value is zero, performing a warm engine water temperature threshold judgment; when the current water temperature is higher than the warm engine water temperature threshold, controlling the electronic water pump to output a second water pump speed and controlling the temperature control mechanism to output a second target opening.

[0012] Optionally, when the hybrid vehicle control method executes the step of controlling the electronic water pump to output a second water pump speed and controlling the temperature control mechanism to output a second target opening when the current water temperature is higher than the warm engine water temperature threshold, it includes: obtaining the ambient temperature; obtaining an auxiliary target speed value and an auxiliary target opening value according to the ambient temperature and the current water temperature; using the auxiliary target speed as the second water pump speed and the auxiliary target opening as the second target opening.

[0013] Optionally, before executing the step of obtaining the fast heating demand signal, it includes:

[0014] In response to the air-conditioning demand temperature being higher than the ambient temperature or the warm air damper opening being greater than zero, obtaining the current water temperature for warm air water temperature threshold judgment;

[0015] Generating an engine operation demand signal when the current water temperature is lower than the warm air water temperature threshold.

[0016] Optionally, after executing the step of generating the engine operation demand signal, it includes:

[0017] Read the engine speed value according to the engine operating requirement signal;

[0018] When the engine speed value is zero, start the engine, and / or when the engine speed value is not zero, maintain the operating state of the engine.

[0019] Optionally, when the hybrid vehicle control method executes the step of setting the shift logic to the first power load mode according to the rapid heating demand signal to increase or maintain the engine's power load, setting the engine's heat load logic to the first heat load mode to increase or maintain the engine's heat load, controlling the electronic water pump to output the first water pump speed to increase or maintain the electronic water pump speed, and controlling the temperature control mechanism to output the first target opening to increase or maintain the opening of the temperature control mechanism, it includes: obtaining the engine operating condition, the current water temperature, and the ambient temperature; obtaining the main target speed value according to the engine operating condition, and obtaining the auxiliary target speed value according to the current water temperature and the ambient temperature; taking the larger value of the main target speed value and the auxiliary target speed value as the first water pump speed.

[0020] Optionally, when the hybrid vehicle control method executes the step of setting the shift logic to the first power load mode according to the rapid heating demand signal to increase or maintain the engine's power load, setting the engine's heat load logic to the first heat load mode to increase or maintain the engine's heat load, controlling the electronic water pump to output the first water pump speed to increase or maintain the electronic water pump speed, and controlling the temperature control mechanism to output the first target opening to increase or maintain the opening of the temperature control mechanism, it includes: obtaining the engine operating condition, the current water temperature, and the ambient temperature; obtaining the main target opening according to the engine operating condition, and obtaining the auxiliary target opening according to the current water temperature and the ambient temperature; taking the larger value of the main target opening and the auxiliary target opening as the first target opening.

[0021] Optionally, when the hybrid vehicle control method executes the step of setting the shift logic to the first power load mode according to the rapid heating demand signal to increase or maintain the engine's power load, setting the engine's heat load logic to the first heat load mode to increase or maintain the engine's heat load, controlling the electronic water pump to output the first water pump speed to increase or maintain the electronic water pump speed, and controlling the temperature control mechanism to output the first target opening to increase or maintain the opening of the temperature control mechanism, it includes: obtaining the state of the hybrid transmission; when the engine is in the series hybrid state, switch the engine's operating line to the first operating line with reduced thermal efficiency to increase the heat transfer loss.

[0022] Optionally, when the engine is in a series hybrid state, the hybrid vehicle control method includes, in the step of switching the operating line of the engine to an operating line with reduced thermal efficiency to increase heat transfer loss: obtaining the current state of charge balance threshold of the power battery; changing the current state of charge balance threshold to a first state of charge balance threshold, where the current state of charge balance threshold is less than the first state of charge balance threshold.

[0023] Optionally, when the engine is in a series hybrid state, the step of switching the operating line of the engine to an operating line with reduced thermal efficiency to increase heat transfer loss includes: obtaining the current vehicle speed threshold and / or the current power threshold for hybrid transmission mode switching;

[0024] changing the current vehicle speed threshold to a first vehicle speed threshold, and / or changing the current power threshold to a first power threshold; where the first vehicle speed threshold is greater than the current vehicle speed threshold, and the first power threshold is greater than the current power threshold.

[0025] Optionally, after the hybrid vehicle control method executes the step of setting the shift logic to a first power load mode according to the fast heating demand signal to increase or maintain the engine's power load, setting the engine's heat load logic to a first heat load mode to increase or maintain the engine's heat load, controlling the electronic water pump to output a first water pump speed to increase or maintain the electronic water pump speed, and controlling the temperature control mechanism to output a first target opening to increase or maintain the opening of the temperature control mechanism, the method includes: obtaining the state of the hybrid transmission; when the engine is in a parallel hybrid state, setting the charge and discharge factor of the power battery to a first factor value to reduce the charge and discharge power of the battery.

[0026] Optionally, after the hybrid vehicle control method executes the step of setting the shift logic to a first power load mode according to the fast heating demand signal to increase or maintain the engine's power load, setting the engine's heat load logic to a first heat load mode to increase or maintain the engine's heat load, controlling the electronic water pump to output a first water pump speed to increase or maintain the electronic water pump speed, and controlling the temperature control mechanism to output a first target opening to increase or maintain the opening of the temperature control mechanism, the method includes: turning off the fast heating demand signal when the current water temperature is higher than the fast heating demand threshold.

[0027] On the other hand, the present application also provides a hybrid vehicle control device. Specifically, the hybrid vehicle control device includes a state acquisition module and a processing module connected to each other: the state acquisition module is configured to acquire and send a rapid heating demand signal to the processing module; the processing module is configured to set the shift logic to a first power load mode to increase or maintain the power load of the engine according to the rapid heating demand signal, set the heat load logic of the engine to a first heat load mode to increase or maintain the heat load of the engine, control the electronic water pump to output a first water pump speed to increase or maintain the speed of the electronic water pump, and control the temperature control mechanism to output a first target opening degree to increase or maintain the opening degree of the temperature control mechanism.

[0028] Optionally, the state acquisition module of the hybrid vehicle control device includes a system self-check unit, a sensor judgment unit, a demand judgment unit, and a water temperature sensor; the state acquisition module is further configured to: control the system self-check unit to perform a self-check on the cooling system; when the result of the self-check on the cooling system is normal, control the sensor judgment unit to perform a fault judgment on the water temperature sensor; when the result of the fault judgment on the water temperature sensor is normal, obtain the rapid heating demand signal from the demand judgment unit; according to the rapid heating demand signal, obtain the current water temperature from the water temperature sensor to perform a warm air water temperature threshold judgment; when the current water temperature is higher than the warm air water temperature threshold, output the rapid heating demand signal.

[0029] Optionally, the demand judgment unit of the hybrid vehicle control device is configured to generate the rapid heating demand signal when the ambient temperature is lower than the ambient temperature threshold, the opening degree of the warm air damper exceeds the damper threshold, and the current water temperature is lower than the rapid heating water temperature threshold.

[0030] Optionally, the processing module of the hybrid vehicle control device is connected to the water temperature sensor, and the processing module is further configured to enter a rapid warm-up mode when the current water temperature is not higher than the warm air water temperature threshold and the engine is in a working state.

[0031] Optionally, the rapid warm-up mode of the hybrid vehicle control device is selected from at least one of a minimum flow mode, a zero flow mode, and an On-Off mode.

[0032] Optionally, the value range of the warm air water temperature threshold of the hybrid vehicle control device is 50-65°C.

[0033] Optionally, the hybrid vehicle control device further includes an engine sensor connected to the processing module. The engine sensor is configured to acquire and send an engine speed value to the processing module. The processing module is further configured to read the engine speed value when the current water temperature is not higher than the warm air water temperature threshold. When the engine speed value is zero, the processing module determines the warm-up water temperature threshold. When the current water temperature is higher than the warm-up water temperature threshold, the processing module controls the electronic water pump to output a second water pump speed and controls the temperature control mechanism to output a second target opening degree.

[0034] Optionally, the state acquisition module of the hybrid vehicle control device is configured to acquire and send the current water temperature and the ambient temperature to the processing module. The processing module is further configured to: acquire an auxiliary target speed and an auxiliary target opening degree according to the ambient temperature and the current water temperature; use the auxiliary target speed as the second water pump speed and the auxiliary target opening degree as the second target opening degree.

[0035] Optionally, in response to the air-conditioning demand temperature being higher than the ambient temperature or the warm air damper opening degree being greater than zero, the demand judgment unit generates an engine operation demand signal when the current water temperature is lower than the warm air water temperature threshold.

[0036] Optionally, the hybrid vehicle control device further includes an engine sensor connected to the processing module. The engine sensor is configured to acquire and send an engine speed value to the processing module;

[0037] The processing module is further configured to read the engine speed value according to the engine operation demand signal. When the engine speed value is zero, the processing module controls the engine control system to start the engine, and / or when the engine speed value is not zero, the processing module controls the engine control system to maintain the engine running state.

[0038] Optionally, the state acquisition module of the hybrid vehicle control device is configured to acquire and send the engine working condition, the current water temperature, and the ambient temperature to the processing module. The processing module is further configured to acquire a main target speed value according to the engine working condition and an auxiliary target speed value according to the current water temperature and the ambient temperature; take the larger value of the main target speed value and the auxiliary target speed value as the first water pump speed.

[0039] Optionally, the state acquisition module of the hybrid vehicle control device is configured to acquire and send the engine working condition, the current water temperature, and the ambient temperature to the processing module. The processing module is further configured to acquire a main target opening degree according to the engine working condition and an auxiliary target opening degree according to the current water temperature and the ambient temperature; take the larger value of the main target opening degree and the auxiliary target opening degree as the first target opening degree.

[0040] Optionally, the state acquisition module of the hybrid vehicle control device is further configured to acquire and send the state of the hybrid transmission to the processing module; the processing module is configured to switch the operating line of the engine to a first operating line with reduced thermal efficiency to increase heat transfer loss when the engine is in a series hybrid state.

[0041] Optionally, the state acquisition module of the hybrid vehicle control device is further configured to acquire and send the current state of charge balance threshold of the power battery to the processing module; the processing module is configured to change the current state of charge balance threshold to a first state of charge balance threshold when the engine is in a series hybrid state, where the current state of charge balance threshold is less than the first state of charge balance threshold.

[0042] Optionally, the state acquisition module is further configured to acquire and send the current vehicle speed threshold and / or the current power threshold for hybrid transmission mode switching to the processing module; the processing module is configured to change the current vehicle speed threshold to a first vehicle speed threshold, and / or change the current power threshold to a first power threshold; where the first vehicle speed threshold is greater than the current vehicle speed threshold, and the first power threshold is greater than the current power threshold.

[0043] Optionally, the state acquisition module of the hybrid vehicle control device is further configured to acquire and send the state of the hybrid transmission to the processing module; the processing module is configured to set the charge and discharge factor of the power battery to a first factor value to reduce the charge and discharge power of the battery when the engine is in a parallel hybrid state.

[0044] Optionally, the state acquisition module of the hybrid vehicle control device is further configured to turn off the fast heating demand signal when the current water temperature is higher than the fast heating demand threshold.

[0045] On the other hand, the present application also provides a vehicle. Specifically, the vehicle includes a vehicle body and the hybrid vehicle control device as described above.

[0046] On the other hand, the present application also provides a computer storage medium. Specifically, a computer program is stored on the computer storage medium, and when the computer program is executed by a computer, the hybrid vehicle control method as described above can be implemented.

[0047] As described above, the hybrid vehicle control method, device, vehicle, and computer storage medium provided by the present application can quickly provide the supply of warm air for the hybrid vehicle and effectively improve the comfort of the passenger compartment. Description of the Drawings

[0048] The accompanying drawings here are incorporated into the specification and form a part of this specification, showing embodiments consistent with this application, and are used together with the specification to explain the principles of this application. To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, for those of ordinary skill in the art, other accompanying drawings can be obtained based on these drawings without creative efforts.

[0049] Figure 1 It is a flowchart of a hybrid vehicle control method according to an embodiment of this application.

[0050] Figure 2 It is a flowchart of a hybrid vehicle control method according to another embodiment of this application.

[0051] Figure 3 It is a flowchart of a hybrid vehicle control method according to another embodiment of this application.

[0052] Figure 4 It is a flowchart of a hybrid vehicle control method according to another embodiment of this application.

[0053] Figure 5 It is a flowchart of a hybrid vehicle control method according to another embodiment of this application.

[0054] Figure 6 It is a block diagram of a hybrid vehicle control device according to an embodiment of this application.

[0055] Figure 7 It is a block diagram of a hybrid vehicle control device according to another embodiment of this application.

[0056] The realization of the purpose of this application, functional features and advantages will be further described with reference to the embodiments and the accompanying drawings. Through the above accompanying drawings, the clear embodiments of this application have been shown, and there will be more detailed descriptions hereinafter. These accompanying drawings and text descriptions are not intended to limit the scope of the concept of this application in any way, but to explain the concept of this application to those skilled in the art by referring to specific embodiments. Detailed Embodiments

[0057] Here, the exemplary embodiments will be described in detail, and the examples are shown in the accompanying drawings. When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. On the contrary, they are merely examples of devices and methods consistent with some aspects of this application as detailed in the appended claims.

[0058] It should be noted that in this text, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising one..." does not exclude the existence of additional identical elements in the process, method, article or device comprising that element. In addition, components, features, and elements with the same name in different embodiments of this application may have the same meaning or different meanings, and their specific meanings need to be determined based on their interpretation in that specific embodiment or further in combination with the context of that specific embodiment.

[0059] It should be understood that the specific embodiments described herein are merely for explaining this application and are not used to limit this application.

[0060] An electrified cooling system generally refers to a cooling system that applies an electric water pump and a temperature control mechanism. The electric water pump drives the impeller through a motor, enabling stepless adjustment of the water pump flow rate; the temperature control mechanism can actively distribute the flow rates of the large radiator circulation and the bypass small circulation by adjusting the valve opening in real time through a motor, so flexible changes can be achieved in specific control.

[0061] After a conventional vehicle starts, the engine keeps running and can continuously supply heat. However, hybrid vehicles have an EV pure electric mode where the engine does not start, as well as series and parallel hybrid modes where the engine operates. During the process of switching between multiple modes, various situations such as the engine starting, not starting, hot state, and cold state will occur. For general hybrid vehicles, to avoid this situation and ensure that warm air can be supplied under any circumstances, a PTC heater and a small electric water pump are equipped. When the engine stops, the small electric water pump is started to maintain the circulation of the warm air branch, and self-heating is carried out with the PTC. However, both of these newly added components are relatively expensive, and the cost is extremely high.

[0062] In some hybrid vehicles with a low-cost route, solving this problem is relatively simple and direct, that is, regardless of any mode, as long as the air conditioner requests warm air supply, the engine needs to start. If it has already started, it will maintain the start. If it is in the pure electric mode, the engine will maintain idling after starting. This solution has two problems. One is that even when the engine does not start in the hot state, there is still some hot water in the cylinder that can be utilized, and directly starting the engine at this time will cause unnecessary waste; the other is that when the engine is started in the pure electric mode, the engine can only maintain idling, and the engine under idling conditions cannot guarantee sufficient heat supply.

[0063] The present invention is based on an electrified cooling system. Through the vehicle controller's identification of the vehicle state and the demand for warm air, comprehensive arbitration and judgment are carried out. When there is no demand for warm air, rapid engine warm-up can be achieved through ultra-low flow, avoiding engine oil dilution. In addition, the vehicle operating conditions are adjusted simultaneously to increase the heat supply, further improving the engine warm-up speed. After reaching the permitted conditions, the response to warm air starts. It can both achieve rapid engine warm-up and ensure the supply of warm air.

[0064] In one aspect, the present application provides a control method for a hybrid vehicle. Figure 1 It is a flowchart of the control method for a hybrid vehicle according to an embodiment of the present application.

[0065] Please refer to Figure 1 , in an embodiment, the control method for a hybrid vehicle includes:

[0066] S10: Obtain a rapid heating demand signal;

[0067] S20: According to the rapid heating demand signal, set the shift logic to the first power load mode to increase or maintain the engine's power load, set the engine's heat load logic to the first heat load mode to increase or maintain the engine's heat load, control the electronic water pump to output the first water pump speed to increase or maintain the electronic water pump speed, and control the temperature control mechanism to output the first target opening to increase or maintain the opening of the temperature control mechanism.

[0068] In this embodiment, when the engine of the hybrid vehicle is in the starting state and enters the rapid heating mode after obtaining the rapid heating demand signal, set the internal shift logic to the first power load mode (such as the sport mode) that can increase the engine's power load. Compared with the normal load mode, the first power load mode increases the heat supply. Similarly, adjust the engine's heat load logic to the first heat load mode that can increase the engine's heat load.

[0069] In this embodiment, to cope with the demand for warm air, the cooling system is adjusted. Control the electronic water pump to output the first water pump speed to increase or maintain the electronic water pump speed, and control the temperature control mechanism to output the first target opening to increase or maintain the opening of the temperature control mechanism. In practical applications, when the water temperature rises above the threshold, gradually increase the electronic water pump speed until its flow rate meets the warm air demand, and at the same time increase the opening of the temperature control mechanism to ensure that there is enough flow in the warm air branch. In another embodiment, if the water temperature has not exceeded the threshold, the electronic water pump and the temperature control mechanism maintain ultra-low flow to rapidly increase the water temperature and oil temperature first.

[0070] In this embodiment, through the settings of the shift logic, heat load logic, electronic water pump, and temperature control mechanism, the supply of warm air can be quickly provided, improving the comfort of the cockpit.

[0071] Figure 2Flowchart of the hybrid vehicle control method according to another embodiment of the present application.

[0072] Please refer to Figure 2 , in one embodiment, before the hybrid vehicle control method executes step S10: obtaining a rapid heating demand signal, it includes:

[0073] S30: Perform a self-check on the cooling system;

[0074] After the vehicle is powered on, the engine control system starts to perform a self-check on the cooling system. If there is an abnormality, an alarm is given, the engine torque is limited, and the engine control system inputs a signal to adjust the flow rate of the electric water pump to the minimum value.

[0075] S40: When the result of the self-check on the cooling system is normal, perform a failure determination on the water temperature sensor.

[0076] After the self-check, start to determine whether the water temperature sensor is faulty. If the water temperature sensor is faulty, the engine control system alarms, inputs a signal to adjust the flow rate of the electric water pump to the maximum value, and at the same time requires the temperature control mechanism to open to the fully open position to avoid engine overheating.

[0077] S50: When the result of the failure determination on the water temperature sensor is normal, obtain a rapid heating demand signal.

[0078] If the water temperature sensor is normal, the response stage of the heating function can be entered.

[0079] S60: According to the rapid heating demand signal, obtain the current water temperature and perform a judgment on the warm water temperature threshold.

[0080] In the vehicle cabin, heating is carried out by a suitable water temperature. Therefore, when responding to the rapid heating demand signal, first judge whether the current water temperature is suitable for providing warm air.

[0081] S70: When the current water temperature is higher than the warm water temperature threshold, output a rapid heating demand signal.

[0082] When the water temperature is relatively low, more serious emissions and engine oil dilution problems will occur. Therefore, before outputting the rapid heating demand signal, it is necessary to first determine that the current water temperature is higher than the set warm water temperature threshold.

[0083] Before entering the rapid heating mode, by first judging the state of the hybrid vehicle itself, the hybrid vehicle can provide the rapid heating function service safely and appropriately, enhancing the safety of the hybrid vehicle.

[0084] In one embodiment, when the hybrid vehicle control method executes step S50 of obtaining a rapid heating demand signal when the water temperature sensor fault determination result is normal, it includes: generating a rapid heating demand signal when the ambient temperature is lower than the ambient temperature threshold, the warm air damper opening exceeds the damper threshold, and the current water temperature is lower than the rapid heating water temperature threshold.

[0085] Under the condition that the ambient temperature in the cold region is low enough and the water temperature is also low enough, if the user has a strong demand for warm air, causing the damper to open significantly, then the rapid heating mode should be entered at this time.

[0086] In one embodiment, after the hybrid vehicle control method executes step S60 of judging the warm water temperature threshold according to the rapid heating demand signal, it includes step S71: reading the engine speed value when the current water temperature is not higher than the warm water temperature threshold; when the engine speed value is not zero, entering the rapid warm-up mode.

[0087] When the water temperature is not high enough and the engine has started, a rapid warm-up strategy is adopted. At this time, the electronic water pump and the temperature control mechanism will adjust themselves to maintain an ultra-low flow rate throughout the system, so that the water temperature and oil temperature rise rapidly, in order to avoid heat dissipation in the heater core after supplying warm air, which affects the rise of the water temperature and oil temperature and causes the problem of oil dilution.

[0088] In one embodiment, after the vehicle is powered on, the engine control system starts to self-check the cooling system. If everything is normal, it proceeds to the next step; if it is abnormal, it alarms, limits the engine torque, and the engine control system inputs a signal to adjust the flow rate of the electronic water pump to the minimum value. After the cooling system self-check is normal, it starts to judge whether the water temperature sensor is faulty. If the water temperature sensor is faulty, the engine control system alarms and inputs a signal to adjust the flow rate of the electronic water pump to the maximum value, and at the same time requires the temperature control mechanism to open to full open to avoid engine overheating; if the water temperature sensor is normal, it further judges that when the ambient temperature is lower than the ambient temperature threshold, the warm air damper opening exceeds the damper threshold, and the current water temperature is lower than the rapid heating water temperature threshold, then a rapid heating demand signal is generated, requesting to enter the rapid heating mode. At this time, if the engine is working and the water temperature is not higher than the warm water temperature threshold, it enters the rapid warm-up mode. If it is higher than the warm water temperature threshold, the cooling system directly enters the rapid heating mode.

[0089] In one embodiment, the rapid warm-up mode of the hybrid vehicle control method is selected from at least one of the minimum flow mode, the zero flow mode, and the On-Off mode.

[0090] In this embodiment, the minimum flow rate mode means that the electric water pump operates at the minimum flow rate, and the temperature control mechanism is adjusted to the initial opening angle of the small cycle, that is, the opening degree that can maintain the minimum flow rate; the zero flow rate mode means that the electric water pump stops working, the temperature control mechanism is adjusted to the fully closed position, and the internal water temperature of the cylinder is continuously judged. When the internal water temperature reaches the preset threshold, it enters the minimum flow rate mode; the On-off mode means that within each time period of the electric water pump, it works for several seconds and stops for several seconds, and the working speed and time period are set based on the current water temperature and engine operating conditions. When there is no demand for warm air, rapid engine warm-up can be achieved through ultra-low flow rate to avoid engine oil dilution. In addition, the vehicle operating conditions are adjusted simultaneously to increase the heat supply, further improving the engine warm-up speed.

[0091] In one embodiment, the value range of the warm air water temperature threshold of the hybrid vehicle control method is 50 - 65 °C.

[0092] In this embodiment, when the water temperature rises to 50 - 65 °C, subsequent consideration can be given to responding to the warm air demand. At this time, the more serious problems of emissions and engine oil dilution have been solved. In order to meet the defrosting requirements and warm air comfort, the fuel consumption can be appropriately sacrificed, and the value range of the warm air water temperature threshold is 50 - 65 °C. In other embodiments, the warm air water temperature threshold can also be appropriately selected from other temperature values according to the situation.

[0093] Figure 3 It is a flowchart of the hybrid vehicle control method according to another embodiment of the present application.

[0094] In one embodiment, after the hybrid vehicle control method executes S60: judging the warm air water temperature threshold according to the rapid heating demand signal, the following steps are included:

[0095] S72: When the current water temperature is not higher than the warm air water temperature threshold, read the engine speed value.

[0096] S73: When the engine speed value is zero, judge the warm-up water temperature threshold.

[0097] S74: When the current water temperature is higher than the warm-up water temperature threshold, control the electric water pump to output the second water pump speed and control the temperature control mechanism to output the second target opening degree.

[0098] When the warm-up water temperature is high enough and the engine is not working, the engine control system determines that it is the shutdown state after the vehicle has worked for a period of time. At this time, a part of the heat in the engine can be applied. Then the engine control system continues to maintain the operation of the electric water pump and the temperature control module without starting the engine, so that the system still maintains the flow supply of warm air internally.

[0099] In this embodiment, the engine is not working, but the water temperature is relatively high, and the engine is in a hot state. Such scenarios occur after the engine has been working for a long time, when the battery power is relatively high and it suddenly switches to the shutdown state, or when the engine stalls during traffic lights start-stop. Although the engine is not working and cannot supply heat, if the coolant in the cooling system circulates, it can still supply heat to the heater. Therefore, in such a scenario, the engine control system of the hybrid vehicle starts the electric water pump and sets the rotational speed without starting the engine, and starts the temperature control module and sets the opening degree. The rotational speed of the electric water pump and the opening degree of the temperature control module are related to the engine working conditions, vehicle working conditions, water temperature, and ambient temperature.

[0100] In one embodiment, when the hybrid vehicle control method executes S74: when the current water temperature is higher than the hot engine water temperature threshold, the step of controlling the electric water pump to output the second water pump rotational speed and controlling the temperature control mechanism to output the second target opening degree includes: obtaining the ambient temperature; obtaining the auxiliary target rotational speed value and the auxiliary target opening degree value according to the ambient temperature and the current water temperature; using the auxiliary target rotational speed as the second water pump rotational speed and the auxiliary target opening degree as the second target opening degree.

[0101] Since the engine is not working at this time and there is no need to control the electric water pump and the temperature control module, the actually set output is the above-mentioned auxiliary target rotational speed, outputting the auxiliary target opening degree, and directly using the auxiliary output value as the final output value.

[0102] In one embodiment, before the hybrid vehicle control method executes S60: obtaining the fast heating demand signal, it includes:

[0103] In response to the air conditioning demand temperature being higher than the ambient temperature or the heater air door opening degree being greater than zero, obtain the current water temperature for judging the hot water temperature threshold; when the current water temperature is lower than the hot water temperature threshold, generate an engine operation demand signal.

[0104] For example, the air conditioning system judges whether there is a heating demand according to the actual situation. If the user turns on the air conditioner and the demand temperature is higher than the ambient temperature, at this time the heater air door opens and its air door position is not 0, then set the ordinary heating demand status bit to 1 and send it to the vehicle CAN network.

[0105] Then, the air conditioning system judges whether to start the engine. The judgment conditions include two items:

[0106] Judge whether the ordinary heating demand status bit is set to 1; judge whether the water temperature is lower than the hot water temperature threshold at this time.

[0107] If both conditions are met, set the engine start bit to 1 and send it to the normal CAN network to represent that the engine needs to be in the running state.

[0108] In one embodiment, after performing the step of generating an engine operation demand signal, it includes:

[0109] According to the engine operation demand signal, read the engine speed value;

[0110] When the engine speed value is zero, start the engine, and / or when the engine speed value is not zero, maintain the engine operating state.

[0111] For example, the hybrid vehicle controller grabs the fast heating demand status bit and the engine start bit on the vehicle CAN network. When the hybrid vehicle controller determines that the engine start bit is 1 and the air conditioning system requires the engine to start, it then determines the current engine start situation. If the engine has already started, maintain the start state; if not, start the engine immediately.

[0112] Figure 4 It is a flowchart of a hybrid vehicle control method according to another embodiment of the present application.

[0113] In one embodiment, in the step of performing S20: according to the fast heating demand signal, setting the shift logic to the first power load mode to increase or maintain the engine's power load, setting the engine's heat load logic to the first heat load mode to increase or maintain the engine's heat load, controlling the electronic water pump to output the first water pump speed to increase or maintain the electronic water pump speed, and controlling the temperature control mechanism to output the first target opening to increase or maintain the opening of the temperature control mechanism in the hybrid vehicle control method, it includes:

[0114] S21: Obtain the engine working condition, the current water temperature, and the ambient temperature.

[0115] S22: Obtain the main target speed value according to the engine working condition, and obtain the auxiliary target speed value according to the current water temperature and the ambient temperature.

[0116] S23: Take the larger value between the main target speed value and the auxiliary target speed value as the first water pump speed.

[0117] Please continue to refer to Figure 4 , in one embodiment, in the step of performing S20: according to the fast heating demand signal, setting the shift logic to the first power load mode to increase or maintain the engine's power load, setting the engine's heat load logic to the first heat load mode to increase or maintain the engine's heat load, controlling the electronic water pump to output the first water pump speed to increase or maintain the electronic water pump speed, and controlling the temperature control mechanism to output the first target opening to increase or maintain the opening of the temperature control mechanism in the hybrid vehicle control method, it includes:

[0118] S21: Obtain the engine working condition, the current water temperature, and the ambient temperature.

[0119] S24: Obtain the main target opening according to the engine operating conditions, and obtain the auxiliary target opening according to the current water temperature and ambient temperature.

[0120] S25: Take the larger value between the main target opening and the auxiliary target opening as the first target opening.

[0121] The electric water pump is a newly developed part. By driving the impeller with an electric motor, stepless adjustment of the water pump flow rate can be achieved; the temperature control mechanism can actively distribute the flow rates of the large radiator cycle and the bypass small cycle by adjusting the valve opening in real time through the electric motor. When the water temperature rises above the threshold, the speed of the electric water pump is increased until its flow rate meets the warm air demand, and at the same time, the opening of the temperature control mechanism is increased to ensure sufficient flow rate in the warm air branch.

[0122] In this embodiment, after the engine control system determines to start responding to the warm air, while outputting the main target speed to the electric water pump according to the engine operating conditions, it will also output the auxiliary target speed. The setting of the auxiliary target speed will ensure that there is at least sufficient flow rate in the warm air branch. This target value is obtained by looking up a table based on the current water temperature and ambient temperature and is data obtained through experimental calibration. Thereafter, the larger value between the main target speed and the auxiliary target speed is taken as the final target speed, that is, the first water pump speed, output by the engine control system to the electric water pump. At the same time, while the engine control system outputs the main target opening to the temperature control mechanism according to the engine operating conditions, it will also output the auxiliary target opening. The setting of the auxiliary target speed will ensure that there is at least sufficient flow rate in the warm air branch. This target value is obtained by looking up a table based on the current water temperature and ambient temperature and is data obtained through experimental calibration. The larger value between the main target speed and the auxiliary target speed is taken as the final target opening, that is, the first target opening, output by the engine control system to the temperature control mechanism.

[0123] Figure 5 It is a flowchart of a hybrid vehicle control method according to another embodiment of the present application.

[0124] As Figure 5 shown, in one embodiment, the steps of the hybrid vehicle control method in executing S20: According to the fast heating demand signal, setting the shift logic to the first power load mode to increase or maintain the engine's power load, setting the engine's heat load logic to the first heat load mode to increase or maintain the engine's heat load, controlling the electric water pump to output the first water pump speed to increase or maintain the electric water pump speed, and controlling the temperature control mechanism to output the first target opening to increase or maintain the opening of the temperature control mechanism include:

[0125] S26: Obtain the state of the hybrid transmission; S27: When the engine is in the series hybrid state, switch the engine's operating line to the first operating line with reduced thermal efficiency to increase the heat transfer loss.

[0126] In one embodiment, when the hybrid vehicle control method executes S27: when the engine is in the series hybrid state, switching the operating line of the engine to an operating line with reduced thermal efficiency to increase heat transfer loss includes: obtaining the current state of charge balance threshold of the power battery; changing the current state of charge balance threshold to a first state of charge balance threshold, where the current state of charge balance threshold is less than the first state of charge balance threshold.

[0127] When the engine is in the series hybrid operating state, since the final output of the whole vehicle is only the motor, the engine actually exists in the form of a range extender and only provides energy for the battery. At this time, the hybrid vehicle controller requires the engine to change the operating line, from the operating line based on the highest thermal efficiency to another operating line with lower thermal efficiency, to increase heat transfer loss by actively reducing the thermal efficiency, increasing the thermal load of the engine, so that more heat enters the cooling system, increasing the temperature rise rate of the water temperature and oil temperature, in order to preferentially ensure reliability and comfort in a low-temperature environment. Among them, the low thermal efficiency line condition is obtained by actual test calibration. In addition, the threshold of the battery state of charge balance rises appropriately. For example: in the conventional state, when the charge reaches 50% of the state of charge, the series mode is exited and the pure electric mode is entered; in the fast heating state, it is allowed to charge to 80% of the state of charge and then exit the series mode and enter the pure electric mode, extending the working duration of the engine. The setting of the state of charge balance threshold under the fast heating demand is related to the water temperature and the ambient temperature, and the hybrid vehicle controller obtains it by looking up a table, and its specific setting is obtained by a large number of test calibrations.

[0128] In one embodiment, when executing step S27: when the engine is in the series hybrid state, switching the operating line of the engine to an operating line with reduced thermal efficiency to increase heat transfer loss includes:

[0129] Obtaining the current vehicle speed threshold and / or the current power threshold for hybrid transmission mode switching; changing the current vehicle speed threshold to a first vehicle speed threshold, and / or, changing the current power threshold to a first power threshold. Wherein, the first vehicle speed threshold is greater than the current vehicle speed threshold, and the first power threshold is greater than the current power threshold.

[0130] For example, originally when the vehicle speed was higher than 60 km / h or the vehicle power of the whole vehicle was higher than 15 kW, the parallel mode was entered; at this time, it is necessary to enter the parallel mode when the vehicle speed is higher than 80 km / h or the vehicle power of the whole vehicle is higher than 25 kW.

[0131] Please continue to refer to Figure 5, in one embodiment, when the hybrid vehicle control method executes S20: according to the fast heating demand signal, set the shift logic to the first power load mode to increase or maintain the engine's power load, set the engine's heat load logic to the first heat load mode to increase or maintain the engine's heat load, control the electric water pump to output the first water pump speed to increase or maintain the electric water pump speed, and control the temperature control mechanism to output the first target opening to increase or maintain the opening of the temperature control mechanism, the steps include:

[0132] S26: Obtain the state of the hybrid transmission; S29: When the engine is in the parallel hybrid state, set the charge-discharge factor of the power battery to the first factor value to reduce the charge-discharge power of the battery.

[0133] When the engine is in the parallel hybrid working state, both the engine and the motor output power to the outside at the same time. Among them, the engine can supply heat for the warm air, while the motor cannot. Therefore, in the parallel state, in order to improve the temperature rise level, it is necessary to increase the load of the engine. Under the road driving conditions, since the total road demand total power remains unchanged, the total demand power is composed of the motor output power and the engine output power. In the parallel hybrid working state, through the adjustment of the hybrid vehicle controller, the charge-discharge power of the battery is reduced, and the proportion of the motor output power is reduced. At this time, the battery discharges faster. To maintain the power balance, a relatively large charging power is also required. Then, while the engine outputs power, it also needs to output an additional part of the power to charge the battery. The combination of the two will significantly increase the engine's heat load. Among them, the power of the battery charge and discharge is adjusted by a correction factor. The setting of this factor under the fast heating demand is related to the water temperature and the ambient temperature, and the hybrid vehicle controller obtains it by looking up a table. Its specific setting is calibrated based on a large number of tests.

[0134] In one embodiment, after the hybrid vehicle control method executes S20: according to the fast heating demand signal, set the shift logic to the first power load mode to increase or maintain the engine's power load, set the engine's heat load logic to the first heat load mode to increase or maintain the engine's heat load, control the electric water pump to output the first water pump speed to increase or maintain the electric water pump speed, and control the temperature control mechanism to output the first target opening to increase or maintain the opening of the temperature control mechanism, it includes: when the current water temperature is higher than the fast heating demand threshold, turn off the fast heating demand signal.

[0135] In this embodiment, when the water temperature exceeds the fast heating threshold, the air conditioning system no longer sends out the fast heating demand to the outside, the engine control system exits the warm air demand control of the electric water pump and the temperature control module, and exits the fast heating mode.

[0136] On the other hand, the present application also provides a hybrid vehicle control device, Figure 6 which is a block diagram of the hybrid vehicle control device according to an embodiment of the present application.

[0137] Please refer to Figure 6 In one embodiment, the hybrid vehicle control device includes a state acquisition module 100 and a processing module 200 that are interconnected.

[0138] Among them: The state acquisition module 100 is configured to acquire and send a fast heating demand signal to the processing module 200; the processing module 200 is configured to set the shift logic to a first power load mode to increase or maintain the engine's power load according to the fast heating demand signal, set the engine's heat load logic to a first heat load mode to increase or maintain the engine's heat load, control the electronic water pump to output a first water pump speed to increase or maintain the electronic water pump speed, and control the temperature control mechanism to output a first target opening to increase or maintain the opening of the temperature control mechanism.

[0139] In this embodiment, when the hybrid vehicle acquires a fast heating demand signal and enters the fast heating mode, the internal shift logic is set to a first power load mode such as the sport mode that can increase the engine power load. Compared with the normal load mode, the first power load mode increases the heat supply. Similarly, the engine's heat load logic is also adjusted to a first heat load mode that can increase the engine's heat load.

[0140] In this embodiment, to cope with the warm air demand, the cooling system is adjusted to control the electronic water pump to output a first water pump speed to increase or maintain the electronic water pump speed, and control the temperature control mechanism to output a first target opening to increase or maintain the opening of the temperature control mechanism. In practical applications, when the water temperature rises above the threshold, the electronic water pump speed is gradually increased until its flow rate meets the warm air demand, and at the same time, the opening of the temperature control mechanism is increased to ensure that there is enough flow in the warm air branch. In another embodiment, if the water temperature has not exceeded the threshold, the electronic water pump and the temperature control mechanism maintain an ultra-low flow rate to quickly increase the water temperature and oil temperature first.

[0141] In this embodiment, by setting the shift logic, heat load logic, electronic water pump, and temperature control mechanism, the supply of warm air can be quickly provided, improving the comfort of the cockpit.

[0142] Figure 7 It is a block diagram of the hybrid vehicle control device according to another embodiment of the present application.

[0143] Please refer to Figure 7, in one embodiment, the status acquisition module 100 of the hybrid vehicle control device includes a system self-check unit 101, a sensor judgment unit 102, a demand judgment unit 103, and a water temperature sensor 104; the status acquisition module 100 is further configured to: control the system self-check unit 101 to perform a self-check on the cooling system; when the self-check result of the cooling system is normal, control the sensor judgment unit 102 to perform a fault judgment on the water temperature sensor 104; when the fault judgment result of the water temperature sensor 104 is normal, obtain a rapid heating demand signal from the demand judgment unit 103; according to the rapid heating demand signal, obtain the current water temperature from the water temperature sensor 104 to perform a warm air water temperature threshold judgment; when the current water temperature is higher than the warm air water temperature threshold, output a rapid heating demand signal.

[0144] Before entering the rapid heating mode, by judging the state of the hybrid vehicle itself first, the hybrid vehicle can provide the rapid heating function service in a safe and appropriate situation, enhancing the safety of the hybrid vehicle.

[0145] In one embodiment, the demand judgment unit 103 of the hybrid vehicle control device is configured to generate a rapid heating demand signal when the ambient temperature is lower than the ambient temperature threshold, the opening of the warm air damper exceeds the damper threshold, and the current water temperature is lower than the fast heating water temperature threshold.

[0146] In a cold region where the ambient temperature is low enough and the water temperature is also low enough, if the user has a strong demand for warm air, causing the damper to open significantly, then the rapid heating mode should be entered at this time.

[0147] In one embodiment, the processing module 200 of the hybrid vehicle control device is connected to the water temperature sensor 104, and the processing module 200 is further configured to enter the rapid warm-up mode when the current water temperature is not higher than the warm air water temperature threshold and the engine is in the working state.

[0148] When the water temperature is not high enough, a rapid warm-up strategy is adopted. At this time, the electronic water pump and the temperature control mechanism will automatically adjust to maintain an ultra-low flow rate throughout the system, allowing the water temperature and oil temperature to rise rapidly, so as to avoid heat dissipation in the heater core after supplying warm air, which affects the rise of the water temperature and oil temperature and causes the problem of oil dilution.

[0149] In another embodiment, after the vehicle is powered on, the system self-check unit of the engine control system starts to perform a self-check on the cooling system. If all self-checks are normal, proceed to the next step; if abnormal, alarm, limit the engine torque, and the engine control system inputs a signal to adjust the flow rate of the electronic water pump to the minimum value.

[0150] After the self-check of the cooling system is normal, the control sensor judgment unit starts to judge whether the water temperature sensor is faulty. If the water temperature sensor is faulty, the engine control system will alarm, input a signal to adjust the flow rate of the electronic water pump to the maximum value, and at the same time require the temperature control mechanism to open to the fully open position to avoid overheating of the engine.

[0151] If the water temperature sensor is normal, the current water temperature value is read. When it is judged that the ambient temperature is lower than the ambient temperature threshold, the opening of the warm air damper exceeds the damper threshold, and the current water temperature is lower than the fast warm water threshold, the demand judgment unit generates a fast heating demand signal and requires entering the fast heating mode. If the engine is working and the water temperature is not higher than the warm water temperature threshold, the fast warm-up mode is entered first. If the engine is working and the water temperature is higher than the warm water temperature threshold, the cooling system directly enters the fast heating mode.

[0152] Before entering the fast heating mode, by judging the state of the hybrid vehicle itself, the hybrid vehicle can provide the fast heating function service safely and appropriately, enhancing the safety of the hybrid vehicle.

[0153] In one embodiment, the fast warm-up mode of the hybrid vehicle control device is selected from at least one of the minimum flow mode, zero flow mode and On-Off mode.

[0154] In this embodiment, the minimum flow mode is that the electronic water pump works at the minimum flow rate, and the temperature control mechanism is adjusted to the initial opening angle of the small cycle, that is, the opening degree that can maintain the minimum flow rate; the zero flow mode is that the electronic water pump stops working, the temperature control mechanism is adjusted to the fully closed position, and the internal water temperature of the cylinder is continuously judged. When the internal water temperature reaches the preset threshold, the minimum flow mode is entered; the On-off mode is that the electronic water pump works for several seconds and stops for several seconds in each time period, and the working speed and time period are set based on the current water temperature and engine working conditions. When there is no warm air demand, fast warm-up can be achieved through ultra-low flow rate to avoid oil dilution. In addition, the whole vehicle working conditions are adjusted at the same time to increase the heat supply and further improve the engine warm-up speed.

[0155] In one embodiment, the value range of the warm water temperature threshold of the hybrid vehicle control device is 50-65°C.

[0156] In this embodiment, when the water temperature rises to 50-65°C, subsequent response to warm air demand can be considered. At this time, more serious problems such as emissions and oil dilution have been solved. In order to meet the defrosting requirements and warm air comfort, the fuel consumption can be appropriately sacrificed. The value range of the warm water temperature threshold is 50-65°C. In other embodiments, the warm water temperature threshold can also be appropriately selected from other temperature values according to the situation.

[0157] In one embodiment, the hybrid vehicle control device further includes an engine sensor connected to the processing module 100. The engine sensor is configured to obtain and send the engine speed value to the processing module 200. The processing module 200 is further configured to read the engine speed value when the current water temperature is not higher than the warm air water temperature threshold. When the engine speed value is zero, it performs the judgment of the warm engine water temperature threshold. When the current water temperature is higher than the warm engine water temperature threshold, it controls the electronic water pump to output the second water pump speed and controls the temperature control mechanism to output the second target opening degree.

[0158] When the warm engine water temperature is high enough and the engine is not working, the engine control system determines that it is the shutdown state after the vehicle has been working for a period of time. At this time, a part of the heat in the engine can be applied. Therefore, the engine control system continues to maintain the operation of the electronic water pump and the temperature control module without starting the engine, so that the system still maintains the flow to supply warm air internally.

[0159] In this embodiment, the engine is not working, but the water temperature is high, and the engine is in a hot state. This kind of scenario occurs after the engine has been working for a long time, the battery power is high, and it suddenly switches to the shutdown state, or when the engine stalls during traffic lights start-stop. Although the engine does not work and cannot supply heat source, if the coolant in the cooling system circulates, it can still supply heat to the warm air. Therefore, in this scenario, the engine control system of the hybrid vehicle starts the electronic water pump and sets the speed, and starts the temperature control module and sets the opening degree without starting the engine. The speed setting of the electronic water pump and the opening degree setting of the temperature control module are related to the engine working conditions, vehicle working conditions, water temperature, and ambient temperature.

[0160] In one embodiment, the state acquisition module 100 of the hybrid vehicle control device is configured to obtain and send the current water temperature and ambient temperature to the processing module 200. The processing module 200 is further configured to: obtain the auxiliary target speed and the auxiliary target opening degree according to the ambient temperature and the current water temperature; use the auxiliary target speed as the second water pump speed and the auxiliary target opening degree as the second target opening degree.

[0161] Since the engine is not working at this time and there is no need to control the electronic water pump and the temperature control module, the engine control system of the hybrid vehicle obtains and sends the current water temperature and ambient temperature to the processing module 200 through the state acquisition module 100. The processing module 200 obtains the auxiliary target speed and the auxiliary target opening degree according to the ambient temperature and the current water temperature; uses the auxiliary target speed as the second water pump speed and the auxiliary target opening degree as the second target opening degree. The actual set output is the above-mentioned auxiliary target speed, and the auxiliary target opening degree is output, and the auxiliary output value is directly used as the final output value.

[0162] In one embodiment, the demand judgment unit 103 generates an engine operation demand signal when the air-conditioning demand temperature is higher than the ambient temperature or the warm air damper opening is greater than zero and the current water temperature is lower than the warm water temperature threshold.

[0163] For example, the air conditioning system determines whether there is a heating demand according to the actual situation. For example, when the user turns on the air conditioner and the demand temperature is higher than the ambient temperature, the warm air damper is opened and its damper position is not 0. Then, the ordinary heating demand status bit is set to 1 and sent to the vehicle CAN network.

[0164] Then, the air conditioning system determines whether to start the engine. The determination conditions include two items:

[0165] Determine whether the ordinary heating demand status bit is set to 1; determine whether the water temperature is lower than the warm water temperature threshold at this time.

[0166] If both conditions are met, the engine start bit is set to 1 and sent to the normal CAN network to represent that the engine needs to be in the running state.

[0167] In one embodiment, the hybrid vehicle control device further includes an engine sensor connected to the processing module. The engine sensor is used to acquire and send the engine speed value to the processing module 200.

[0168] The processing module 200 is further used to read the engine speed value according to the engine operation demand signal.

[0169] When the engine speed value is zero, the processing module 200 controls the engine control system to start the engine. And / or, when the engine speed value is not zero, the processing module 200 controls the engine control system to maintain the engine running state.

[0170] For example, the hybrid vehicle controller grabs the fast heating demand status bit and the engine start bit on the vehicle CAN network. When the hybrid vehicle controller determines that the engine start bit is 1 and the air conditioning system needs the engine to start, it determines the current engine start situation. If the engine has started, it maintains the start state; if not, it immediately starts the engine.

[0171] In one embodiment, the state acquisition module 100 of the hybrid vehicle control device is used to acquire and send the engine working condition, the current water temperature and the ambient temperature to the processing module 200. The processing module 200 is further used to acquire the main target speed value according to the engine working condition, and acquire the auxiliary target speed value according to the current water temperature and the ambient temperature; take the larger of the main target speed value and the auxiliary target speed value as the first water pump speed.

[0172] In one embodiment, the state acquisition module 100 of the hybrid vehicle control device is configured to acquire and send the engine operating condition, the current water temperature, and the ambient temperature to the processing module 200. The processing module 200 is further configured to obtain the main target opening based on the engine operating condition, and obtain the auxiliary target opening based on the current water temperature and the ambient temperature; the larger value between the main target opening and the auxiliary target opening is taken as the first target opening.

[0173] The electric water pump is a newly developed component. By driving the impeller with an electric motor, stepless adjustment of the water pump flow rate can be achieved; the temperature control mechanism can actively distribute the flow rates of the large radiator circulation and the bypass small circulation by adjusting the valve opening in real time through the electric motor. When the water temperature rises above the threshold, the speed of the electric water pump is increased until its flow rate meets the warm air demand, and at the same time, the opening of the temperature control mechanism is increased to ensure sufficient flow rate in the warm air branch.

[0174] In this embodiment, after the engine control system determines to start responding to the warm air, while outputting the main target speed to the electric water pump according to the engine operating condition obtained from the state acquisition module 100, it also outputs the auxiliary target speed. The setting of the auxiliary target speed will ensure that there is at least sufficient flow rate in the warm air branch. This target value is obtained by looking up a table based on the current water temperature and the ambient temperature and is data obtained through experimental calibration. Thereafter, the larger value between the main target speed and the auxiliary target speed is taken by the processing module as the final target speed output by the engine control system to the electric water pump, that is, the first water pump speed. At the same time, the engine control system will output the auxiliary target opening while outputting the main target opening to the temperature control mechanism according to the engine operating condition obtained from the state acquisition module 100. The setting of the auxiliary target speed will ensure that there is at least sufficient flow rate in the warm air branch. This target value is obtained by looking up a table based on the current water temperature and the ambient temperature and is data obtained through experimental calibration. The larger value between the main target speed and the auxiliary target speed is taken by the processing module as the final target opening output by the engine control system to the temperature control mechanism, that is, the first target opening.

[0175] In one embodiment, the state acquisition module 100 of the hybrid vehicle control device is further configured to acquire and send the state of the hybrid transmission to the processing module 200; the processing module 200 is configured to switch the operating line of the engine to the first operating line with reduced thermal efficiency to increase the heat transfer loss when the engine is in the series hybrid state.

[0176] In one embodiment, the state acquisition module 100 of the hybrid vehicle control device is further configured to acquire and send the current state of charge balance threshold of the power battery; the processing module 200 is configured to change the current state of charge balance threshold to the first state of charge balance threshold when the engine is in the series hybrid state, where the current state of charge balance threshold is less than the first state of charge balance threshold.

[0177] When the engine is in the series hybrid operation state, since the final output of the whole vehicle is only the motor, the engine actually exists in the form of a range extender, only providing energy for the battery. At this time, the hybrid vehicle control device obtains and sends the state of the hybrid transmission to the processing module 200 through the state acquisition module 100; the processing module 200 will switch to another operating line with lower thermal efficiency based on the operating line with the highest thermal efficiency, and increase the heat transfer loss by actively reducing the thermal efficiency, thereby increasing the thermal load of the engine, enabling more heat to enter the cooling system, and increasing the temperature rise rate of the water temperature and oil temperature, in order to give priority to ensuring reliability and comfort in a low-temperature environment. Among them, the low thermal efficiency line condition is calibrated by actual tests. In addition, the state acquisition module 100 of the hybrid vehicle control device obtains and sends the current power balance threshold of the power battery; the processing module 200 increases the threshold of the current power balance. For example: in the normal state, when the charge reaches 50% of the power, it exits the series mode and enters the pure electric mode. In the fast heating state, it is allowed to charge to 80% of the power and then exit the series mode and enter the pure electric mode, extending the working duration of the engine. The setting of the power balance threshold under fast heating requirements is related to the water temperature and ambient temperature, and the hybrid vehicle controller obtains it by looking up a table, and its specific setting is calibrated through a large number of tests.

[0178] In one embodiment, the state acquisition module 100 is further configured to obtain and send the current vehicle speed threshold and / or the current power threshold for the hybrid transmission mode switch to the processing module 200.

[0179] The processing module 200 is configured to change the current vehicle speed threshold to a first vehicle speed threshold, and / or change the current power threshold to a first power threshold. Among them, the first vehicle speed threshold is greater than the current vehicle speed threshold, and the first power threshold is greater than the current power threshold.

[0180] For example, originally when the vehicle speed is higher than 60 km / h or the vehicle power of the whole vehicle is higher than 15 kW, it enters the parallel mode; at this time, it is required to enter the parallel mode when the vehicle speed is higher than 80 km / h or the vehicle power of the whole vehicle is higher than 25 kW.

[0181] In one embodiment, the state acquisition module 100 of the hybrid vehicle control device is further configured to obtain and send the state of the hybrid transmission; the processing module 200 is configured to set the charge and discharge factor of the power battery to a first factor value to reduce the charge and discharge power of the battery when the engine is in the parallel hybrid state.

[0182] When the engine is in the parallel hybrid working state, both the engine and the motor output power to the outside at the same time. Among them, the engine can supply heat for the warm air, while the motor cannot. Therefore, in the parallel state, in order to improve the temperature rise level, it is necessary to increase the load of the engine. Under the road driving conditions, since the total required power of the road surface remains unchanged, the total required power is composed of the output power of the motor and the output power of the engine. In the parallel hybrid working state, through the adjustment of the hybrid vehicle controller, the charge and discharge power of the battery is reduced, and the proportion of the motor output power is reduced. At this time, the battery discharges relatively fast. To maintain the power balance, a relatively large charging power is also required for charging. Therefore, while the engine outputs power, it also needs to output an additional part of the power to charge the battery. The combination of the two will significantly increase the heat load of the engine. Among them, the charge and discharge power of the battery is adjusted by a correction factor. The setting of this factor under the rapid heating demand is related to the water temperature and the ambient temperature, and the hybrid vehicle controller obtains it by looking up a table. Its specific setting is obtained through a large number of tests and calibrations.

[0183] In an embodiment, the state acquisition module 100 of the hybrid vehicle control device is further configured to turn off the rapid heating demand signal when the current water temperature is higher than the rapid heating demand threshold.

[0184] In this embodiment, when the water temperature exceeds the rapid heating threshold, the state acquisition module 100 of the hybrid vehicle control device no longer sends out the rapid heating demand to the outside, and the engine control system exits the warm air demand control of the electronic water pump and the temperature control module, and exits the rapid heating mode.

[0185] On the other hand, the present application also provides a computer storage medium. Specifically, a computer program is stored on the computer storage medium. When the computer program is executed by the computer, it can implement the hybrid vehicle control method as described above. When the computer program implements the hybrid vehicle control method, the technical principles involved are the same as those in the above embodiments, and will not be elaborated here.

[0186] On the other hand, the present application also provides a vehicle. Specifically, the vehicle includes a vehicle body and the hybrid vehicle control device as described above.

[0187] In an embodiment, the heating working steps of the hybrid vehicle are as follows:

[0188] (1) After the vehicle is powered on, the engine control system starts self-checking. The self-checking process mainly focuses on the states of the electronic water pump and the temperature control mechanism.

[0189] For an electric water pump, when a brushless DC motor starts, after the stator and rotor enter the open-loop control in the aligned phase and before entering the closed-loop, the speed is appropriately increased first, and at the same time, the current of the water pump is detected to see if the internal current can increase correspondingly. If the internal current Ic increases correspondingly and reaches the preset threshold Id, it indicates that the speed is normal; if the current at the corresponding speed does not reach the preset threshold Id, it indicates that the water pump load is insufficient, the coolant may leak out completely, or the air in the system is not completely discharged, there is a certain risk: the electronic water pump controller may be burned due to overheating, and the engine cooling is insufficient.

[0190] Considering that the initial water temperature of the whole vehicle is not high when it is powered on for the first time and the risk is not great, the engine control system inputs a signal to the water pump at this time, requiring it to provide only the minimum flow. At this time, the water pump controller generates less heat and will not cause burnout, and it can guarantee the possible cooling cycle to the minimum extent. At the same time, it is required that the engine limit speed and torque to reduce heat generation. This situation enables the whole vehicle to have the ability to move the vehicle and can play a role in protecting each component.

[0191] For the temperature control mechanism, after starting, it performs self-learning of the fully closed position. If it gets stuck in the fully closed position, the entire system will be shut down and lose flow, and the engine will have the risk of overheating. And because the internal hot water will not flow to the outside, the external sensor cannot correctly sense the internal hot water and cannot perform effective monitoring. Therefore, when a malfunction such as getting stuck occurs, the engine is required to limit speed and torque.

[0192] (2) After the self-check is normal, it starts to judge whether the water temperature sensor is faulty. If the water temperature sensor is faulty, the engine control system will alarm and adjust the input flow of the electronic water pump to the maximum value, and send a signal to open the temperature control mechanism to the fully open position to avoid engine overheating.

[0193] (3) If the water temperature sensor is normal, the engine control system first judges whether to enter the fast warm-up mode. The judgment and execution of fast warm-up are both completed inside the engine control system. Since the engine will enrich the air-fuel mixture at low temperatures, resulting in incomplete combustion of some fuel, it is easy to wet the cylinder walls at low temperatures and flow into the oil. The emissions are poor at this stage, and the risk of oil dilution is also high. Therefore, this stage should be quickly skipped. In the cold start stage, fast warm-up is the first priority. The warm air is actually a heat exchange source. After it is turned on, heat will dissipate to the outside. Therefore, even if there is warm air at this time, it will not respond to it.

[0194] The whole process of fast warm-up can generally be divided into three stages. The first stage is up to -10°C. In this stage, it is required that the temperature of the inner wall of the cylinder rises rapidly. 10°C to 60°C is the second stage. At this time, it is required that the oil temperature rises rapidly. The first two stages have a greater impact on emissions and oil dilution. The subsequent is the third stage, which is mainly used to improve fuel consumption.

[0195] Under normal circumstances, if there is no demand for warm air, the water temperature will directly rise from the low temperature state to 80 - 90 °C before exiting the rapid engine warm-up mode and entering the normal working mode. However, if there is a demand for warm air, the water temperature can rise to 50 - 65 °C. Subsequently, it can be considered to respond to the warm air demand. At this time, the more serious problems of emissions and oil have been solved. In order to meet the defrosting requirements and warm air comfort, the fuel consumption can be appropriately sacrificed.

[0196] Therefore, in this stage of control, the main tasks are to monitor the value of the water temperature sensor and the preset control threshold, and adjust the working state of the entire cooling system. First, read the current water temperature value T0 and check whether the engine is in the working state; if the engine is working and the water temperature is lower than the warm air water temperature threshold T end , then enter the rapid engine warm-up mode. If it is higher than the warm air water temperature threshold T end , the cooling system will directly enter the normal working mode.

[0197] In the rapid engine warm-up mode, the electric water pump and the temperature control mechanism execute the corresponding rapid engine warm-up strategies. For example:

[0198] Minimum flow mode: The electric water pump works at the minimum flow rate EWP min , and the temperature control mechanism is adjusted to the initial opening angle of the small cycle, that is, the opening degree TMM min that can maintain the minimum flow rate;

[0199] Zero flow mode: The electric water pump stops working, the temperature control mechanism is adjusted to the fully closed position, and the internal water temperature of the T1 cylinder is continuously judged. When the internal water temperature reaches the preset threshold, enter the minimum flow mode;

[0200] On-off mode: In each time cycle, the electric water pump works for several seconds and stops for several seconds. The working speed and time cycle are set based on the current water temperature and engine working conditions;

[0201] There are many kinds of rapid engine warm-up strategies. The intention is to accelerate the entire engine warm-up process only by relying on the adjustment of the cooling system without changing the engine working conditions.

[0202] When the water temperature is higher than the warm air water temperature threshold T end , there is no need for rapid engine warm-up at this time. Instead, attention should be paid to whether the system is overheating. Therefore, the adjustment of the electric water pump and the temperature control mechanism returns to the normal mode. In the normal mode, the rotational speed of the electric water pump and the opening degree of the temperature control mechanism are related to the engine working conditions, vehicle working conditions, water temperature, and ambient temperature.

[0203] (4) The air conditioning system judges whether there is a heating demand or a rapid heating demand.

[0204] The purpose of rapid warm-up is different from that of rapid heating. The main purpose of rapid warm-up is to solve the problems of engine emissions and oil dilution, which belong to the avoidance of quality problems in regulatory requirements and vehicle reliability. Compared with conventional mechanical water pumps and thermostats, the rapid warm-up strategy itself can already make the water temperature rise to the warm air response threshold faster and better avoid oil dilution. However, the rapid heating strategy can further improve the comfort of the warm air. Among them, in hybrid vehicles, the start and stop of the engine are controlled by the hybrid vehicle controller. The hybrid vehicle controller sends speed and torque requirements to the engine control system, and then the engine control system adjusts the state of the engine by itself, including electrified components such as the electric water pump and temperature control module in the cooling system.

[0205] The core control of rapid warm-up is completed by the electric water pump and temperature control mechanism, so it is actually completed inside the engine control system. The rapid heating judgment is completed in the air conditioning system. After the air conditioning system completes the judgment, it will set the ordinary heating demand status bit BIT htq , and the rapid heating demand status bit BIT htqrp , and send them to the vehicle CAN network. The hybrid vehicle controller and the engine control system pick up and arbitrate the demand signal on the CAN network, and then require the engine control system to perform corresponding actions.

[0206] The air conditioning system judges whether there is a heating demand according to the actual situation. For example, when the user turns on the air conditioner and the required temperature is higher than the ambient temperature, at this time the warm air damper opens and its damper position is not 0, then the ordinary heating demand status bit BIT htq , is set to 1 and sent to the vehicle CAN network.

[0207] Secondly, the air conditioning system judges whether to start the engine. The judgment conditions include two items:

[0208] a. Judge whether the ordinary heating demand status bit BIT htq is set to 1;

[0209] b. Judge whether the water temperature is lower than the warm air water temperature threshold T end .

[0210] If both conditions are met, the engine start bit BIT htqengon is set to 1 and sent to the normal CAN network.

[0211] After that, the rapid heating demand is judged. The main judgment conditions for rapid heating are three items:

[0212] Judge whether the ambient temperature is lower than the threshold T amb ;

[0213] Determine whether the opening degree of the warm air damper exceeds the threshold HT pos ;

[0214] Determine whether the water temperature is lower than the threshold T htq ;

[0215] If the above three conditions are simultaneously satisfied, that is: in a cold region where the ambient temperature is low enough and the water temperature is also low enough, if the user has a strong demand for warm air, causing the damper to open significantly, then the fast heating mode should be entered at this time, and the fast heating demand status bit BIT htqrp , is set to 1 and sent to the vehicle CAN network.

[0216] The hybrid vehicle controller and the engine control system continuously capture the status information on the vehicle CAN network. If it is determined that the fast heating demand status bit BIT htqrp , after being set to 1, enters the fast heating mode. Otherwise, maintain the current state. For example, if the battery power is high, it is in the electric mode and the engine does not start. If the engine starts, the engine control system internally enters the fast warm-up mode.

[0217] (5) The hybrid vehicle controller captures the fast heating demand status bit BIT htqrp and the engine start bit BIT htqengon on the vehicle CAN network. When the hybrid vehicle controller determines that the engine start bit BIT htqengon is 1 and the air conditioning system requires the engine to start, then judge the current engine start situation. If the engine has already started, maintain the start state. If not, start the engine immediately.

[0218] Hybrid vehicles have an EV pure electric mode where the engine does not start in the EV mode, as well as series and parallel hybrid modes where the engine operates in these two modes. During the process of switching between multiple modes, there will be various situations such as the engine starting, not starting, and being in a hot or cold state.

[0219] When the hybrid vehicle controller determines that the air conditioning system has a normal heating demand or a fast heating demand, it starts to identify the scenario and adopts different strategy responses through scenario identification.

[0220] The engine may have the following four states:

[0221] S1: The engine is started, and it is in the current hot engine state;

[0222] S2: The engine is started, and it is in the current cold engine state;

[0223] S3: The engine is not working, and it is in the current hot engine state;

[0224] S4: The engine is not working, and it is in the current cold engine state;

[0225] First, identify the engine speed n. Determine whether the speed n is non-zero. If it is non-zero and higher than the idle threshold n_idle (generally not less than 700 r / min, which can be calibrated based on experiments), that is, the engine is in the working state, then consider Scenarios S1 or S2; if it is 0, the engine stops working, then consider Scenarios S3 or S4.

[0226] After that, identify the water temperature sensor. If the water temperature value is lower than the warm-up threshold T hotstate , it is in the cold state. If the water temperature value is not lower than the warm-up threshold T hotstate , it is in the warm state.

[0227] Combining the judgments of the above two parameters, the specific state of the current engine can be determined.

[0228] According to the state of the current engine, the hybrid vehicle controller interacts with the engine control system for the next strategy.

[0229] (6) After the hybrid vehicle controller judges the scenario, it will conduct subsequent strategy interactions.

[0230] When the scenario is S1, the engine has been started and the water temperature is relatively high. At this time, it belongs to the most conventional and ordinary situation. The system has enough heat to supply the warm air. The hybrid vehicle controller ignores the fast warm-up demand from the CAN network, that is, does not consider the fast heating demand BIThtqrp status bit, and only judges whether the warm air request engine start bit BIT htqengon is set. If the engine start bit BIT htqengon is 0, the hybrid vehicle controller makes no changes and maintains the current demand of the hybrid vehicle controller. When the demand of other systems to start the engine disappears, the engine can stop. If the engine start bit BIT htqengon is 1, the hybrid vehicle controller prohibits the engine from stopping. When the demand of other systems for the engine disappears, the engine maintains the normal idle state operation.

[0231] Generally, the engine control system does not need to make additional requirements on the engine working conditions, and only needs to judge the working forms of the electronic water pump and the temperature control module according to its internal logic.

[0232] The main content of the logic is: The engine control system obtains the normal heating demand status bit BIT htqWhen it is 1, it is necessary to make a secondary judgment on whether the warm air can be responded to currently. For example, if the engine control system determines that the water temperature exceeds the warm air water temperature threshold. If it is higher than the threshold, the oil dilution has been initially solved and the warm air can start to be responded to. Generally, this threshold is set within the range of 50 - 65 °C, which is a calibration value set through tests. Since the electronic water pump and the temperature control module are both electronically controlled components, they can be accurately adjusted instantaneously according to the current water temperature setting, and their response speed and accuracy are both better than those of the conventional scheme. After the engine control system determines to start responding to the warm air, while outputting the main target speed to the electronic water pump according to the engine working conditions, it will also output the auxiliary target speed EWP set , the auxiliary target speed EWP set The setting of will ensure that there is at least enough flow in the warm air branch. This target value is obtained by looking up a table based on the current water temperature and the ambient temperature, and it is data obtained through test calibration. After that, the larger value of the main target speed and the auxiliary target speed is taken as the final target speed output by the engine control system to the electronic water pump. At the same time, while outputting the main target opening to the temperature control module according to the engine working conditions, the engine control system will also output the auxiliary target opening TMM set , the auxiliary target opening TMM set The setting of will ensure that there is at least enough flow in the warm air branch. This target value is obtained by looking up a table based on the current water temperature and the ambient temperature, and it is data obtained through test calibration. The larger value of the main target opening and the auxiliary target opening is taken as the final target opening output by the engine control system to the temperature control module.

[0233] When the scenario is S2, the engine has been started, but the water temperature is still low. At this time, the engine control system obtains the ordinary heating demand status bit BIT htq from the CAN network and it is 1. The engine control system makes a secondary judgment on whether the warm air can be responded to currently. For example, if the engine control system determines that the water temperature is lower than the warm-up water temperature threshold T end , it means that the risk of oil dilution still exists. Then the electronic water pump maintains the minimum speed according to the internal logic of the engine control system, and the temperature control module closes to the initial opening position of the small cycle, and the system maintains an ultra-low flow rate to perform rapid warm-up.

[0234] There are many rapid warm-up strategies, including the minimum flow mode, zero flow mode, and On-off mode mentioned above. Its intention is that without changing the engine working conditions, only relying on the adjustment function of the cooling system, the entire engine warm-up process can be accelerated.

[0235] In the rapid warm-up mode, the electronic water pump and the temperature control mechanism execute the corresponding rapid warm-up strategies. For example:

[0236] Minimum flow mode: The electronic water pump operates at the minimum flow rate EWP minWork is carried out, and the temperature control mechanism is adjusted to the initial opening angle of the small cycle, that is, the opening degree TMM that can maintain the minimum flow rate min ;

[0237] Zero-flow mode: The electric water pump stops working, the temperature control mechanism is adjusted to the fully closed position, and the internal water temperature in the T1 cylinder is continuously judged. When the internal water temperature reaches the preset threshold, it enters the minimum flow mode;

[0238] On-off mode: In each time period, the electric water pump works for several seconds and stops for several seconds. The working speed and time period are set based on the current water temperature and engine working conditions.

[0239] When the water temperature is higher than the warm-up end threshold T end At this time, it is actually the hot engine S1 scenario. There is no need for rapid engine warm-up. Instead, attention needs to be paid to whether the system is overheating. Therefore, the adjustment of the electric water pump and the temperature control module returns to the normal mode. In the normal mode, the speed of the electric water pump and the opening degree of the temperature control module are related to the engine working conditions, vehicle conditions, water temperature, and ambient temperature. The empirical setting of the warm-up end threshold is generally 80 - 95°C, usually higher than the warm air water temperature threshold T end That is, during actual use in cold regions, generally, the rapid warm-up mode has not been exited, and the response to the warm air needs to start.

[0240] In scenario S2, the hybrid vehicle controller judges whether the engine start bit BIT htqengon for the warm air request is set. If the engine start bit BIT htqengon is 0, the hybrid vehicle controller does not make any changes and maintains the current demand of the hybrid vehicle controller. When the demand for starting the engine by other systems disappears, the engine can stop. If the engine start bit BIT htqengon is 1, the hybrid vehicle controller prohibits the engine from stopping. When the demand for the engine by other systems disappears, the engine maintains the normal idle state operation.

[0241] Subsequently, the hybrid vehicle controller judges whether the air conditioning system has a rapid heating demand. If the hybrid vehicle controller obtains the rapid heating demand status bit BIT htqrp from the CAN network and it is 0, it is determined that there is no rapid heating demand currently, and the above state remains unchanged.

[0242] If the hybrid vehicle controller obtains the rapid heating demand status bit BIT htqrpIf it is 1, it is determined that there is a current demand for rapid heating, and it is necessary to consider increasing the engine load. At this time, regardless of the current driving mode of the whole vehicle (such as economy, normal), it will enter the sport driving mode. In this mode, the throttle pedal characteristics change, becoming more sensitive and more inclined to increase the engine load. In addition, the hybrid vehicle controller identifies the current state of the hybrid transmission and the operating state of the engine, whether it is in series hybrid or parallel hybrid.

[0243] Under the rapid heating demand, the hybrid vehicle controller judges the current working mode of the whole vehicle. If the current is in the EV mode, the whole vehicle discharges based on the battery and outputs through the motor. At this time, the engine does not work. Actually, it is based on the rapid heating demand status bit BIT sent by the air conditioning system. htqrp Set to 1 to maintain idling speed. At this time, in order to increase the heat load, the engine raises the idling speed, and the idling speed can be obtained by looking up the table based on the water temperature.

[0244] When the engine is in the series hybrid working state, since the final output of the whole vehicle is only the motor, the engine actually exists in the form of a range extender, only providing energy for the battery. At this time, the hybrid vehicle controller requires the engine to change the operating line (the engine can form a full working condition with speed and load as two dimensions, which is a surface working condition. In the series mode, the working range of the engine is a line working condition within this surface working condition. As the vehicle speed changes, its working condition only moves on one line. This line working condition generally considers two points: NVH, the engine speed increases as the vehicle speed increases; fuel consumption, the line working condition is actually selected based on the best fuel consumption points within the surface working condition and connected into a working condition;). It switches from the operating line with the highest thermal efficiency to another operating line with a lower thermal efficiency, actively reducing the thermal efficiency to increase the heat transfer loss, so that more heat enters the cooling system, increasing the temperature rise rate of the water temperature and oil temperature, in order to give priority to ensuring reliability and comfort in a low-temperature environment. This low thermal efficiency line working condition is obtained through actual test calibration. In addition, the threshold SOC of the battery charge balance lim Rises moderately. For example: in the normal state, when charging to 50% of the battery power, it exits the series mode and enters the pure electric EV mode. In the rapid heating state, it is allowed to charge to 80% of the battery power and then exit the series mode and enter the pure electric EV mode, extending the working duration of the engine. SOC lim The setting under the rapid heating demand is related to the water temperature and ambient temperature. The hybrid vehicle controller obtains it by looking up the table, and its specific setting is obtained through a large number of test calibrations. In addition, the vehicle speed threshold and power threshold for exiting the series mode and entering the parallel mode increase. For example, originally, when the vehicle speed was higher than 60 km / h or the vehicle power was higher than 15 kW, it entered the parallel mode; at this time, it is necessary to enter the parallel mode when the vehicle speed is higher than 80 km / h or the vehicle power is higher than 25 kW.

[0245] Under the condition of rapid heating demand, when the engine is in the parallel hybrid operation state, both the engine and the motor output power externally at the same time. Among them, the engine can supply heat for the heater, while the motor cannot. Therefore, in the parallel state, in order to improve the temperature rise level, it is necessary to increase the load of the engine. Under the road driving condition, since the total road demand power P remains unchanged, and P is composed of the motor output power P1 and the engine output power P2, P = P1 + P2. At this time, through the adjustment of the hybrid vehicle controller, the charge and discharge power of the battery is reduced, and the proportion of the motor output power P1 is reduced. At this time, the battery discharges quickly. To maintain the power balance, a relatively large charging power is also required. Then, while the engine increases the output P2, the engine's heat load will be significantly increased. Among them, the charge and discharge power of the battery is adjusted by the correction factor cof pl The adjustment is carried out, and the setting of this factor under the rapid heating demand is related to the water temperature and the ambient temperature. The hybrid vehicle controller obtains it by looking up a table, and its specific setting is calibrated based on a large number of tests.

[0246] In the S2 scenario, if the water temperature is higher than the warm-up water temperature threshold T end , but lower than the fast heating water temperature threshold, the vehicle will continuously be in the state of increasing the engine's heat load as described above. At this time, the engine control system receives the heating demand from the hybrid vehicle controller, that is, it judges the ordinary heating demand status bit BIT htq from the CAN network. When it is 1, as described above, the engine control system judges whether to respond to the heating. After it is determined to start responding to the heating, while outputting the main target speed to the electronic water pump according to the engine working condition, it will output the auxiliary target speed EWP set , and the setting of the auxiliary target speed EWP set will ensure that there is at least enough flow in the heater branch. This target value is obtained by looking up a table based on the current water temperature and the ambient temperature, and it is data calibrated through tests. Then, the larger value of the main target speed and the auxiliary target speed is taken as the final target speed output by the engine control system to the electronic water pump. At the same time, while outputting the main target opening to the temperature control module according to the engine working condition, the engine control system will output the auxiliary target opening TMM set , and the setting of the auxiliary target speed TMM set will ensure that there is at least enough flow in the heater branch. This target value is obtained by looking up a table based on the current water temperature and the ambient temperature, and it is data calibrated through tests. The larger value of the main target speed and the auxiliary target speed is taken as the final target opening output by the engine control system to the temperature control module.

[0247] If it is known from the CAN network that there is no rapid heating demand, the hybrid vehicle controller only judges whether the heating request engine start bit BIT htqengon is set. If the engine start bit BIT htqengonIs 0, the hybrid vehicle controller makes no changes and maintains the current demand situation of the hybrid vehicle controller. When the demand from other systems to start the engine disappears, the engine can stop. For example, if the engine start bit htqengon Is 1, the hybrid vehicle controller prohibits the engine from stopping. When the demand from other systems for the engine disappears, the engine maintains normal idle operation.

[0248] When the scenario is S3, the engine is not working, but the water temperature is relatively high, and the engine is in a hot state. Such scenarios occur after the engine has been working for a long time, the battery charge is relatively high, and it suddenly switches to the EV mode, or when the engine stalls during traffic light starts and stops. Although the engine is not working and cannot supply heat, if the coolant in the cooling system circulates, it can still supply heat to the heater. Therefore, in this scenario, when the hybrid vehicle controller reads the engine start bit sent by the air conditioning system on the CAN network htqengon Is 0, and the fast heating demand status bit htqrp Is 0, no action is taken, and the engine stop state is maintained.

[0249] At this time, the engine control system receives the normal heating demand status bit from the CAN network htq Is 1, as described above, the engine control system performs corresponding processing. Without starting the engine, it starts the electric water pump and sets the speed, and starts the temperature control module and sets the opening. The speed of the electric water pump and the opening of the temperature control module are related to the engine working conditions, vehicle working conditions, water temperature, and ambient temperature. Since the engine is not working at this time and there is no demand for controlling the electric water pump and the temperature control module, the actual set output is the above-mentioned auxiliary target speed EWP set Outputs the auxiliary target opening TMM set And directly uses the auxiliary output value as the final output value.

[0250] The S3 scenario can continuously supply warm air without starting the engine, which can avoid unnecessary engine starts and achieve fuel-saving effects. However, since there is no continuous heat supply from the engine, the residual heat inside will be utilized by the heater core in a short time. In this working mode, the water temperature will continue to drop. When it drops below the hot engine threshold T engstart When it is reached, heat cannot be supplied effectively, so this scenario is exited and the scenario S4 mode is entered, where the hot engine threshold T engstar Is set based on a large number of test calibrations.

[0251] When the scenario is S4, the engine is not working, the water temperature is low, and the engine is in a cold state. This situation is basically a cold start and cannot supply warm air. At this time, while the hybrid vehicle controller sends the warm air demand to the engine control system, it also requests the engine to start. After starting, it enters the scenario S2.

[0252] (7) The subsequent air conditioning system, engine control system, and hybrid vehicle controller system will continuously monitor the water temperature on the vehicle CAN network and exit the fast heating mode according to the water temperature situation.

[0253] When the water temperature exceeds the warm engine threshold T engstar , or does not exceed the warm engine threshold T engstar , when the engine is working or stopped, the control scenario switches among S1, S2, S3, and S4;

[0254] When the water temperature exceeds the fast heating threshold, the air conditioning system no longer sends out fast heating requirements. At this time, BIT htqrp is set to 0.

[0255] After exiting the fast heating mode, if the air conditioning system still has ordinary heating requirements and the ordinary heating requirement status bit BIT htq is 1, the hybrid vehicle controller still forwards this status to the engine control system, requiring the engine control system to still output auxiliary target setting values for the electronic water pump and temperature control module to ensure that the system continues to supply flow for the warm air. If the air conditioning system has no heating requirements and the status bit BIT htq is 0, the engine control system exits the warm air demand control for the electronic water pump and temperature control module and only adjusts them according to the engine working conditions.

[0256] The hybrid vehicle control method, device, vehicle, and computer storage medium provided by this application can quickly provide the supply of warm air for the hybrid vehicle and effectively improve the comfort of the passenger compartment.

[0257] The above are only the preferred embodiments of this application, and do not limit the patent scope of this application accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of this application, or directly or indirectly applied in other related technical fields, shall be similarly included in the patent protection scope of this application.

Claims

1. A hybrid vehicle control method, characterized in that, The hybrid vehicle control method includes: Obtaining a rapid heating demand signal; According to the rapid heating demand signal, setting the shift logic to the first power load mode to increase or maintain the engine's power load, setting the engine's heat load logic to the first heat load mode to increase or maintain the engine's heat load, controlling the electronic water pump to output a first water pump speed to increase or maintain the electronic water pump speed, and controlling the temperature control mechanism to output a first target opening to increase or maintain the opening of the temperature control mechanism; Wherein, before performing the step of obtaining the rapid heating demand signal, it includes: Performing a self-check on the cooling system; When the self-check result of the cooling system is normal, performing a fault judgment on the water temperature sensor; When the fault judgment result of the water temperature sensor is normal, obtaining the rapid heating demand signal; According to the rapid heating demand signal, obtaining the current water temperature for warm air water temperature threshold judgment; When the current water temperature is higher than the warm air water temperature threshold, outputting the rapid heating demand signal.

2. The hybrid vehicle control method according to claim 1, wherein In the step of performing the step of obtaining the rapid heating demand signal when the fault judgment result of the water temperature sensor is normal, it includes: When the ambient temperature is lower than the ambient temperature threshold, the warm air damper opening exceeds the damper threshold, and the current water temperature is lower than the fast warm water threshold, generating the rapid heating demand signal.

3. The hybrid vehicle control method according to claim 1, characterized in that, After performing the step of performing the warm air water temperature threshold judgment according to the rapid heating demand signal, it includes: When the current water temperature is not higher than the warm air water temperature threshold, reading the engine speed value; When the engine speed value is not zero, entering the rapid warm-up mode.

4. The hybrid vehicle control method according to claim 3, characterized in that, The rapid warm-up mode is selected from at least one of the minimum flow mode, zero flow mode, and On-Off mode.

5. The hybrid vehicle control method according to claim 1, characterized in that The value range of the warm air water temperature threshold is 50 - 65 °C.

6. The hybrid vehicle control method according to claim 1, wherein, After performing the step of performing the warm air water temperature threshold judgment according to the rapid heating demand signal, it includes: When the current water temperature is not higher than the warm air water temperature threshold, reading the engine speed value; When the engine speed value is zero, performing a hot engine water temperature threshold judgment; When the current water temperature is higher than the hot engine water temperature threshold, controlling the electronic water pump to output a second water pump speed, and controlling the temperature control mechanism to output a second target opening.

7. The hybrid vehicle control method according to claim 6, wherein In the step of performing the step of controlling the electronic water pump to output a second water pump speed and controlling the temperature control mechanism to output a second target opening when the current water temperature is higher than the hot engine water temperature threshold, it includes: Obtaining the ambient temperature; According to the ambient temperature and the current water temperature, obtaining an auxiliary target speed value and an auxiliary target opening value; Taking the auxiliary target speed as the second water pump speed and the auxiliary target opening as the second target opening.

8. The hybrid vehicle control method according to claim 1, wherein, Before performing the step of obtaining the rapid heating demand signal, it includes: In response to the air conditioner demand temperature being higher than the ambient temperature or the warm air damper opening being greater than zero, obtaining the current water temperature for warm air water temperature threshold judgment; When the current water temperature is lower than the warm air water temperature threshold, generating an engine operation demand signal.

9. The hybrid vehicle control method according to claim 8, wherein, After performing the step of generating the engine operation demand signal, it includes: According to the engine operation demand signal, reading the engine speed value; Start the engine when the engine speed value is zero, and / or maintain the operating state of the engine when the engine speed value is not zero.

10. The hybrid vehicle control method according to claim 1, wherein, In the step of setting the shift logic to the first power load mode according to the rapid heating demand signal to increase or maintain the power load of the engine, setting the heat load logic of the engine to the first heat load mode to increase or maintain the heat load of the engine, controlling the electronic water pump to output the first water pump speed to increase or maintain the speed of the electronic water pump, and controlling the temperature control mechanism to output the first target opening to increase or maintain the opening of the temperature control mechanism, it includes: Obtain the engine operating condition, the current water temperature, and the ambient temperature. Obtain the main target speed value according to the engine operating condition, and obtain the auxiliary target speed value according to the current water temperature and the ambient temperature. Take the larger value of the main target speed value and the auxiliary target speed value as the first water pump speed.

11. The hybrid vehicle control method according to claim 1, wherein, In the step of setting the shift logic to the first power load mode according to the rapid heating demand signal to increase or maintain the power load of the engine, setting the heat load logic of the engine to the first heat load mode to increase or maintain the heat load of the engine, controlling the electronic water pump to output the first water pump speed to increase or maintain the speed of the electronic water pump, and controlling the temperature control mechanism to output the first target opening to increase or maintain the opening of the temperature control mechanism, it includes: Obtain the engine operating condition, the current water temperature, and the ambient temperature. Obtain the main target opening according to the engine operating condition, and obtain the auxiliary target opening according to the current water temperature and the ambient temperature. Take the larger value of the main target opening and the auxiliary target opening as the first target opening.

12. The hybrid vehicle control method according to claim 1, wherein In the step of setting the shift logic to the first power load mode according to the rapid heating demand signal to increase or maintain the power load of the engine, setting the heat load logic of the engine to the first heat load mode to increase or maintain the heat load of the engine, controlling the electronic water pump to output the first water pump speed to increase or maintain the speed of the electronic water pump, and controlling the temperature control mechanism to output the first target opening to increase or maintain the opening of the temperature control mechanism, it includes: Obtain the state of the hybrid transmission. When the engine is in the series hybrid state, switch the operating line of the engine to the first operating line with reduced thermal efficiency to increase the heat transfer loss.

13. The hybrid vehicle control method according to claim 12, wherein In the step of switching the operating line of the engine to the operating line with reduced thermal efficiency to increase the heat transfer loss when the engine is in the series hybrid state, it includes: Obtain the current state of charge balance threshold of the power battery. Change the current state of charge balance threshold to the first state of charge balance threshold, where the current state of charge balance threshold is less than the first state of charge balance threshold.

14. The hybrid vehicle control method according to claim 12, wherein, In the step of switching the operating line of the engine to the operating line with reduced thermal efficiency to increase the heat transfer loss when the engine is in the series hybrid state, it includes: obtaining the current vehicle speed threshold and / or the current power threshold for the hybrid transmission mode switch. Change the current vehicle speed threshold to a first vehicle speed threshold, and / or change the current power threshold to a first power threshold; wherein, the first vehicle speed threshold is greater than the current vehicle speed threshold, and the first power threshold is greater than the current power threshold.

15. The hybrid vehicle control method according to claim 1, wherein The steps of performing setting the shift logic to a first power load mode according to the fast heating demand signal to increase or maintain the engine's power load, setting the engine's heat load logic to a first heat load mode to increase or maintain the engine's heat load, controlling the electronic water pump to output a first water pump speed to increase or maintain the electronic water pump speed, and controlling the temperature control mechanism to output a first target opening to increase or maintain the opening of the temperature control mechanism include: Obtain the state of the hybrid transmission. When the engine is in a parallel hybrid state, set the charge and discharge factor of the power battery to a first factor value to reduce the charge and discharge power of the battery.

16. The hybrid vehicle control method according to any one of claims 1-15, characterized in that, After performing the steps of setting the shift logic to a first power load mode according to the fast heating demand signal to increase or maintain the engine's power load, setting the engine's heat load logic to a first heat load mode to increase or maintain the engine's heat load, controlling the electronic water pump to output a first water pump speed to increase or maintain the electronic water pump speed, and controlling the temperature control mechanism to output a first target opening to increase or maintain the opening of the temperature control mechanism, it includes: When the current water temperature is higher than the fast heating demand threshold, turn off the fast heating demand signal.

17. A hybrid vehicle control device, characterized in that, It includes a state acquisition module and a processing module that are interconnected: The state acquisition module is used to acquire and send a fast heating demand signal to the processing module; The processing module is used to set the shift logic to a first power load mode according to the fast heating demand signal to increase or maintain the engine's power load, set the engine's heat load logic to a first heat load mode to increase or maintain the engine's heat load, control the electronic water pump to output a first water pump speed to increase or maintain the electronic water pump speed, and control the temperature control mechanism to output a first target opening to increase or maintain the opening of the temperature control mechanism; Wherein, the state acquisition module includes a system self-check unit, a sensor judgment unit, a demand judgment unit, and a water temperature sensor; the state acquisition module is further used to: control the system self-check unit to perform a self-check on the cooling system; When the self-check result of the cooling system is normal, control the sensor judgment unit to perform a fault judgment on the water temperature sensor; When the fault judgment result of the water temperature sensor is normal, obtain the fast heating demand signal from the demand judgment unit; According to the fast heating demand signal, obtain the current water temperature from the water temperature sensor to perform a judgment on the warm air water temperature threshold; When the current water temperature is higher than the warm air water temperature threshold, output the fast heating demand signal.

18. The hybrid vehicle control device according to claim 17, wherein The demand judgment unit is used to generate the fast heating demand signal when the ambient temperature is lower than the ambient temperature threshold, the opening of the warm air damper exceeds the damper threshold, and the current water temperature is lower than the fast heating water temperature threshold.

19. The hybrid vehicle control device according to claim 17, characterized in that, The processing module is connected to the water temperature sensor, and the processing module is further configured to enter a rapid warm-up mode when the current water temperature is not higher than the warm air water temperature threshold and the engine is in an operating state.

20. The hybrid vehicle control device according to claim 19, wherein The rapid warm-up mode is selected from at least one of a minimum flow mode, a zero flow mode, and an On-Off mode.

21. The hybrid vehicle control device according to claim 17, wherein The value range of the warm air water temperature threshold is 50 to 65 °C.

22. The hybrid vehicle control device according to claim 17, wherein, The hybrid vehicle control device further includes an engine sensor connected to the processing module, and the engine sensor is configured to acquire and send an engine speed value to the processing module; The processing module is further configured to read the engine speed value when the current water temperature is not higher than the warm air water temperature threshold; When the engine speed value is zero, a warm engine water temperature threshold judgment is performed; When the current water temperature is higher than the warm engine water temperature threshold, the processing module controls the electronic water pump to output a second water pump speed and controls the temperature control mechanism to output a second target opening.

23. The hybrid vehicle control device according to claim 22, characterized in that, The state acquisition module is configured to acquire and send the current water temperature and the ambient temperature to the processing module, and the processing module is further configured to: Acquire an auxiliary target speed and an auxiliary target opening according to the ambient temperature and the current water temperature; use the auxiliary target speed as the second water pump speed and the auxiliary target opening as the second target opening.

24. The hybrid vehicle control device according to claim 17, wherein, In response to the air conditioning demand temperature being higher than the ambient temperature or the warm air damper opening being greater than zero, the demand judgment unit generates an engine operation demand signal when the current water temperature is lower than the warm air water temperature threshold.

25. The hybrid vehicle control device according to claim 24, wherein The hybrid vehicle control device further includes an engine sensor connected to the processing module, and the engine sensor is configured to acquire and send an engine speed value to the processing module; The processing module is further configured to read the engine speed value according to the engine operation demand signal; when the engine speed value is zero, the processing module controls the engine control system to start the engine, and / or when the engine speed value is not zero, the processing module controls the engine control system to maintain the engine operating state.

26. The hybrid vehicle control device according to claim 17, wherein, The state acquisition module is configured to acquire and send the engine working condition, the current water temperature, and the ambient temperature to the processing module, and the processing module is further configured to acquire a main target speed value according to the engine working condition and acquire an auxiliary target speed value according to the current water temperature and the ambient temperature; Take the larger value of the main target speed value and the auxiliary target speed value as the first water pump speed.

27. The hybrid vehicle control device according to claim 17, wherein, The state acquisition module is configured to acquire and send the engine working condition, the current water temperature, and the ambient temperature to the processing module, and the processing module is further configured to acquire a main target opening according to the engine working condition and acquire an auxiliary target opening according to the current water temperature and the ambient temperature; Take the larger value of the main target opening and the auxiliary target opening as the first target opening.

28. The hybrid vehicle control device according to claim 17, wherein, The state acquisition module is further configured to acquire and send the state of the hybrid transmission to the processing module; When the engine is in a series hybrid state, the processing module switches the engine operation line to a first operation line with reduced thermal efficiency to increase heat transfer loss.

29. The hybrid vehicle control device according to claim 28, wherein The state acquisition module is further configured to acquire and send the current power balance threshold of the power battery to the processing module; The processing module is configured to change the current power balance threshold to a first power balance threshold when the engine is in a series hybrid state, where the current power balance threshold is less than the first power balance threshold.

30. The hybrid vehicle control device according to claim 28, characterized in that, The state acquisition module is further configured to acquire and send the current vehicle speed threshold and / or the current power threshold for the hybrid transmission mode switch to the processing module; the processing module is configured to change the current vehicle speed threshold to a first vehicle speed threshold, and / or change the current power threshold to a first power threshold; where the first vehicle speed threshold is greater than the current vehicle speed threshold, and the first power threshold is greater than the current power threshold.

31. The hybrid vehicle control device according to claim 17, characterized in that, The state acquisition module is further configured to acquire and send the state of the hybrid transmission to the processing module; The processing module is configured to set the charge and discharge factor of the power battery to a first factor value to reduce the charge and discharge power of the battery when the engine is in a parallel hybrid state.

32. The hybrid vehicle control device according to any one of claims 17-31, characterized in that, The state acquisition module is further configured to turn off the fast heating demand signal when the current water temperature is higher than the fast heating demand threshold.

33. A vehicle, characterized in that, It includes a vehicle body and a hybrid vehicle control device according to any one of claims 17-32.

34. A computer storage medium, characterized in that, A computer program is stored on the computer storage medium, and when the computer program is executed by the computer, the hybrid vehicle control method according to any one of claims 1-16 can be implemented.

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