Control method, controller and vehicle for a hybrid vehicle

Abstract

The application provides a control method, a controller and a vehicle for a hybrid vehicle. A heating circuit of an air conditioning system of the hybrid vehicle flows through a first circulating water path of an engine and a second circulating water path not flowing through the engine. The control method comprises: obtaining a first water temperature value when the air conditioning of the hybrid vehicle is in a heating mode, the first water temperature value being a water temperature value of the engine; selecting the second circulating water path as the heating circuit of the air conditioning system when the first water temperature value is less than a preset water temperature value; and determining a target circulating water path according to a size relationship between the first water temperature value and a second water temperature value and selecting the target circulating water path as the heating circuit of the air conditioning system when the first water temperature value is greater than or equal to the preset water temperature value. The application can avoid switching to large circulation when the water temperature value of the engine is too low, thereby reducing the heating load of the air conditioning.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicle control, and particularly relates to a control method, a controller and a vehicle of a hybrid electric vehicle. BACKGROUND

[0002] At present, the air conditioner of a hybrid electric vehicle mostly has two heating modes. Generally, a large circulation water circuit or a small circulation water circuit is selected for heating according to the outlet water temperature of an engine and a positive temperature coefficient (PTC) heater.

[0003] For example, when the engine water temperature is greater than the outlet water temperature of the PTC, the large circulation water circuit with the participation of the engine is selected for heating. When the engine water temperature is less than or equal to the outlet water temperature of the PTC, the small circulation water circuit without the participation of the engine is selected for heating. If the engine is not started, when the small circulation water circuit cannot meet the demand, the engine is woken up to start and switched to the large circulation water circuit for heating.

[0004] However, when the hybrid electric vehicle is heating by the air conditioner, the engine is started to switch to the large circulation water circuit for heating, and the engine water temperature has not been raised, which may affect the heating effect. SUMMARY

[0005] The present application provides a control method, a controller and a vehicle of a hybrid electric vehicle to solve the problem that the engine is started for heating when the hybrid electric vehicle is heating by the air conditioner, which may affect the heating effect.

[0006] In a first aspect, the present application provides a control method of a hybrid electric vehicle. The heating circuit of an air conditioning system in the hybrid electric vehicle includes a first circulation water circuit and a second circulation water circuit. The first circulation water circuit is a large circulation water circuit flowing through an engine, and the second circulation water circuit is a small circulation water circuit not flowing through the engine.

[0007] The control method includes:

[0008] When the air conditioner of the hybrid electric vehicle is in a heating mode, a first water temperature value is obtained, and the first water temperature value is a water temperature value of the engine.

[0009] When the first water temperature value is less than a preset water temperature value, the second circulation water circuit is selected as the heating circuit of the air conditioning system.

[0010] When the first water temperature value is greater than or equal to the preset water temperature value, a target circulation water circuit is determined according to the size relationship between the first water temperature value and a second water temperature value, and the target circulation water circuit is selected as the heating circuit of the air conditioning system.

[0011] The second water temperature value is a water temperature value of a PTC heater outlet of the hybrid vehicle, and the target circulating water path is the first circulating water path or the second circulating water path.

[0012] In a possible implementation, the target circulating water path is determined according to a size relationship between the first water temperature value and the second water temperature value, including:

[0013] calculating a difference between the first water temperature value and the second water temperature value;

[0014] when the difference is greater than a first preset value, selecting the first circulating water path as the target circulating water path;

[0015] when the difference is less than a second preset value, selecting the second circulating water path as the target circulating water path;

[0016] when the difference is less than or equal to the first preset value and greater than or equal to the second preset value, selecting a current circulating water path of the air conditioning system as the target circulating water path.

[0017] In a possible implementation, when the air conditioning system of the hybrid vehicle is in a heating mode, the control method further includes:

[0018] determining a start-stop state of the engine;

[0019] Correspondingly, the target circulating water path is determined according to a size relationship between the first water temperature value and the second water temperature value, including:

[0020] determining a switching threshold of the air conditioning system according to the start-stop state of the engine and the second water temperature value;

[0021] determining the target circulating water path according to a size relationship between the first water temperature value and the switching threshold.

[0022] In a possible implementation, the switching threshold of the air conditioning system is determined according to the start-stop state of the engine and the second water temperature value, including:

[0023] if the engine is in a starting state, compensating the second water temperature value based on a first compensation temperature value, and taking the compensated second water temperature value as the switching threshold of the air conditioning system;

[0024] if the engine is in a stopping state, after starting the engine, compensating the second water temperature value based on a second compensation temperature value, and taking the compensated second water temperature value as the switching threshold of the air conditioning system;

[0025] The first compensation temperature value is less than the second compensation temperature value.

[0026] In a possible implementation, the switching threshold of the air conditioning system includes a first switching low value and a first switching high value, and the first compensation temperature value includes a first compensation low value and a first compensation high value.

[0027] The first switching low value is a sum of the second water temperature value and the first compensation low value, and the first switching high value is a sum of the second water temperature value and the first compensation high value.

[0028] The switching threshold of the air conditioning system comprises a second switching low value and a second switching high value, and the second compensation temperature value comprises a second compensation low value and a second compensation high value.

[0029] The second switching low value is a sum of the second water temperature value and the second compensation low value, and the second switching high value is a sum of the second water temperature value and the second compensation high value.

[0030] The first compensation low value is less than the second compensation low value, and the first compensation high value is less than the second compensation high value.

[0031] In a possible implementation, the control method further comprises:

[0032] detecting whether the air conditioner is power-limited

[0033] When the air conditioner is not power-limited, controlling the start-stop of the engine according to a size relationship between the second water temperature value and a target temperature, the target temperature being a final target temperature preset by the air conditioning system.

[0034] When the air conditioner is power-limited, controlling the start-stop of the engine according to a size relationship between the first water temperature value and the target temperature.

[0035] In a possible implementation, the control method further comprises:

[0036] controlling the start-stop of the PTC heater according to a size relationship between the second water temperature value and a target temperature, the target temperature being a final target temperature preset by the air conditioning system.

[0037] After the PTC heater stops heating, controlling the opening degree of the temperature damper of the hybrid electric vehicle according to a size relationship between the second water temperature value and a target temperature, the target temperature being a final target temperature preset by the air conditioning system.

[0038] In a possible implementation, the control method further comprises:

[0039] detecting a heating mode of the air conditioning system, and determining a target temperature of the air conditioning system according to the heating mode, the target temperature being a final target temperature preset by the air conditioning system, and the heating mode comprising a single-occupant-cabin heating mode, a single-battery-pack heating mode, and a dual-working-condition heating mode;

[0040] When the air conditioning system is in the single-occupant-cabin heating mode, the target temperature is a preset heating temperature of the occupant cabin.

[0041] When the air conditioning system is in the single-battery-pack heating mode, the target temperature is a preset heating temperature of the battery pack.

[0042] When the air conditioning system is in the dual working condition heating mode, the target temperature is the maximum of the preset heating temperatures in the passenger cabin and the battery pack.

[0043] In a second aspect, the application provides a control device of a hybrid vehicle, wherein a heating circuit of an air conditioning system in the hybrid vehicle includes a first circulating water circuit and a second circulating water circuit, the first circulating water circuit is a large circulating water circuit flowing through an engine, and the second circulating water circuit is a small circulating water circuit not flowing through the engine.

[0044] The control device includes:

[0045] The control device includes:

[0046] The first selection module is configured to select the second circulating water circuit as the heating circuit of the air conditioning system when the first water temperature value is less than a preset water temperature value.

[0047] The second selection module is configured to determine a target circulating water circuit according to a size relationship between the first water temperature value and a second water temperature value when the first water temperature value is greater than or equal to the preset water temperature value, and select the target circulating water circuit as the heating circuit of the air conditioning system.

[0048] The second water temperature value is a water temperature value of a PTC heater outlet in the hybrid vehicle, and the target circulating water circuit is the first circulating water circuit or the second circulating water circuit.

[0049] In a third aspect, the application provides a controller including a memory and a processor, the memory stores a computer program capable of running on the processor, and the processor implements the steps of the control method of the hybrid vehicle according to the first aspect or any possible implementation manner of the first aspect when executing the computer program.

[0050] In a fourth aspect, the application provides a vehicle including the controller according to the third aspect.

[0051] In a fifth aspect, the application provides a computer readable storage medium, the computer readable storage medium stores a computer program, and the computer program implements the steps of the control method of the hybrid vehicle according to the first aspect or any possible implementation manner of the first aspect when executed by a processor.

[0052] The application provides a control method, a controller and a vehicle of a hybrid vehicle. The water temperature value of an engine and a preset water temperature value are compared when the air conditioner of the hybrid vehicle is in a heating mode. When the water temperature value of the engine is low, a small circulation water path not flowing through the engine is selected as a heating circuit of the air conditioner system, so that the engine is not heated by a heat source and the energy of the vehicle is not consumed. When the water temperature value of the engine is high, the target circulation water path is determined according to the size relationship between the water temperature value of the engine and the water temperature value of the PTC heater outlet, and then the air conditioner heating system is heated, so that the switching of the heating circuit of the air conditioner system is realized when the water temperature value of the engine is high, and the heating efficiency of the vehicle is ensured BRIEF DESCRIPTION OF DRAWINGS

[0053] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0054] Figure 1 is a heating circuit schematic diagram of an air conditioner system of a hybrid vehicle provided by the embodiments of the present application;

[0055] Figure 2 is an implementation flowchart of the control method of the hybrid vehicle provided by the embodiments of the present application;

[0056] Figure 3 is a state switching schematic diagram in an engine starting state provided by the embodiments of the present application;

[0057] Figure 4 is a state switching schematic diagram in an engine non-starting state provided by the embodiments of the present application;

[0058] Figure 5 is an engine start-stop control process schematic diagram provided by the embodiments of the present application;

[0059] Figure 6 is a PTC heater start-stop control process schematic diagram provided by the embodiments of the present application;

[0060] Figure 7 is a target temperature selection logic schematic diagram provided by the embodiments of the present application;

[0061] Figure 8 is an implementation flowchart of another control method of a hybrid vehicle provided by the embodiments of the present application;

[0062] Figure 9 is a structure schematic diagram of a control device of a hybrid vehicle provided by the embodiments of the present application;

[0063] Figure 10 Schematic diagram of the controller provided in an embodiment of the present application. DETAILED DESCRIPTION

[0064] In the following description, specific details such as specific system structures and techniques are provided for purposes of illustration rather than limitation to facilitate a thorough understanding of the embodiments of the present application. However, it will be apparent to those skilled in the art that the present application may be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid obscuring the description of the present application with unnecessary detail.

[0065] In order to make the purpose, technical solutions and advantages of this application clearer, specific embodiments will be described below with reference to the accompanying drawings.

[0066] Figure 1 Schematic diagram of a heating circuit of an air conditioning system of a hybrid vehicle provided in an embodiment of the present application. Figure 1 As shown in the figure, the parts are: (1) AGS (Active grill shutter), (2) COND (condenser), (3) High temperature radiator, (4) Electronic fan, (5) Low temperature overflow tank, (6) Electronic pump, (7) Temperature sensor, (8) MCU (Motor control unit), (9) OBC & DC / DC (On-board charger), (10) Low temperature radiator, (11) Generator, (12) Motor, (13) Battery, (14) Overflow tank, (15) Electronic pump, (16) PHX (Plate heat exchanger), (17) Chiller, (18) EXV (Electronic pump). ExpansionValve, electronic expansion valve), (19) TXV+SOV (Expantion valve+Shutter-off valve, thermal expansion valve+stop valve ), (20) Blower, (21) EVP, (22) Electronic Compressor, (23) PTC, (24) CH, (25) Proportional valve, (26) Electronic pump, (27) 2 / 3 valve, (28) TH, (29) Electronic pump, (30) Engine, (31) Overflow tank, (33) One-way valve, (35) Temperature sensor.

[0067] The heating circuit of the air conditioning system of the hybrid vehicle can include a large circulation water path that flows through the engine and a small circulation water path that does not flow through the engine.

[0068] Specifically as follows:

[0069] The small circulation water path: PTC (23) → CH (24) → Proportional valve (25) → Plate heat exchanger (16) → 2 / 3 valve (27) → Electronic pump (26) → PTC (23).

[0070] The large circulation water path: PTC (23) → CH (24) → Proportional valve (25) → Plate heat exchanger (16) → 2 / 3 valve (27) → Engine water pump (29) → Engine (30) → Electronic pump (26) → PTC (23).

[0071] In actual application, when the hybrid vehicle has a heating demand, the PTC heater adjusts according to the target water temperature and the actual outlet water temperature in the PI mode without starting the engine, and the air conditioning system is in the small circulation water path. However, in some cases, the small circulation water path is difficult to meet the heating demand of the air conditioning system, at which time the engine is started and switched to the large circulation water path. However, the water temperature value of the engine can be lower than the water temperature value of the PTC heater, which will additionally increase the heating load of the air conditioning system and affect the energy of the vehicle.

[0072] To solve the above problems, the embodiment of the application provides a control method of a hybrid vehicle, which determines the switching of the large and small circulation water paths according to the water temperature value of the engine to ensure the heating effect of the vehicle air conditioner.

[0073] As Figure 1As shown, the heating circuit of the air conditioning system of the hybrid electric vehicle in the embodiment of the present application comprises a first circulating water circuit and a second circulating water circuit, the first circulating water circuit is a large circulating water circuit flowing through the engine, and the second circulating water circuit is a small circulating water circuit not flowing through the engine. In the embodiment of the present application, the switching of the first circulating water circuit and the second circulating water circuit can be realized by controlling the state of the three-way water valve.

[0074] Referring to Figure 2 , which shows the implementation flowchart of the control method of the hybrid electric vehicle provided by the embodiment of the present application. As Figure 2 shown, the control method of the hybrid electric vehicle can comprise S101 to S103.

[0075] S101, when the air conditioner of the hybrid electric vehicle is in the heating mode, a first water temperature value is obtained, and the first water temperature value is the water temperature value of the engine.

[0076] The execution subject of the embodiment of the present application can be the vehicle central control, the air conditioner controller or other controller for controlling the air conditioner of the vehicle of the hybrid electric vehicle. Specifically, it can be set according to the actual situation. The vehicle central control is taken as the execution subject for illustration in the embodiment of the present application, and the same applies to other execution subjects.

[0077] When the vehicle central control detects that the air conditioner of the hybrid electric vehicle has a heating demand, the water temperature value of the engine can be obtained in real time through the water temperature sensor of the engine, and the water temperature value of the engine is recorded as the first water temperature value.

[0078] Optionally, when the vehicle central control detects that the air conditioning heating inside the passenger compartment is triggered, for example, the driver presses the air conditioning heating button, indicating that the air conditioner of the vehicle has a heating demand, and the current air conditioner is in the heating mode. Or, when the vehicle central control detects that the temperature of the battery pack of the hybrid electric vehicle is lower than the preset temperature, indicating that the battery pack has a heating demand, the air conditioner will be woken up for heating, at this time, the air conditioner is in the heating mode. The preset temperature can be set according to the actual situation.

[0079] S102, when the first water temperature value is less than a preset water temperature value, the second circulating water circuit is selected as the heating circuit of the air conditioning system.

[0080] The preset water temperature value is a water temperature value less than the normal water temperature value of the engine. For example, the normal water temperature value of the engine is 90℃, and the preset water temperature value can be 60℃. It can be set according to the actual situation.

[0081] When the vehicle central control detects that the first water temperature value is less than the preset water temperature value, it indicates that the water temperature value of the engine is too low, at this time, the second circulating water circuit not flowing through the engine can be selected as the heating circuit of the air conditioning system, which can avoid the engine directly participating in the water circuit circulation and reduce the energy loss of the circulating water circuit.

[0082] Specifically, if the engine has been started, when the first water temperature value is less than the preset water temperature value, the second circulating water circuit is selected as the heating circuit of the air conditioning system, so that the engine is prevented from directly participating in the water circuit circulation and affecting the heating effect of the air conditioning. After the water temperature value of the engine rises, the engine can be switched to participate in the water circuit circulation.

[0083] If the engine has not been started, after the engine is started, when the first water temperature value is less than the preset water temperature value, the second circulating water circuit is selected as the heating circuit of the air conditioning system, so that the engine is prevented from affecting the heating effect of the air conditioning. After the water temperature value of the engine rises, the engine can be switched to participate in the water circuit circulation to ensure the heating effect of the air conditioning.

[0084] S103, when the first water temperature value is greater than or equal to the preset water temperature value, determining a target circulating water circuit according to the size relationship between the first water temperature value and the second water temperature value, and taking the target circulating water circuit as the heating circuit of the air conditioning system;

[0085] The second water temperature value is the water temperature value of the PTC heater outlet in the hybrid electric vehicle, and the target circulating water circuit is the first circulating water circuit or the second circulating water circuit.

[0086] When the vehicle central control detects that the water temperature value of the engine is greater than or equal to the preset water temperature value, the engine can be allowed to participate in the circulation, that is, at this time, the air conditioning system can switch between the first circulating water circuit and the second circulating water circuit. Specifically, the target circulating water circuit can be determined according to the size relationship between the water temperature value of the engine and the water temperature value of the PTC heater outlet, and the target circulating water circuit is taken as the heating circuit of the air conditioning system.

[0087] Optionally, determining the target circulating water circuit according to the size relationship between the first water temperature value and the second water temperature value can include:

[0088] When the first water temperature value is greater than the second water temperature value, the first circulating water circuit is selected as the target circulating water circuit, that is, the first circulating water circuit is taken as the heating circuit of the air conditioning system, so that the air conditioning is heated through the first circulating water circuit. When the first water temperature value is less than or equal to the second water temperature value, the second circulating water circuit is selected as the target circulating water circuit, that is, the second circulating water circuit is taken as the heating circuit of the air conditioning system, so that the air conditioning is heated through the second circulating water circuit.

[0089] Alternatively, when the first water temperature value and the second water temperature value are close, the first circulating water circuit is selected as the target circulating water circuit, so that the air conditioning is heated through the first circulating water circuit. When the first water temperature value and the second water temperature value differ greatly and the first water temperature value is less than the second water temperature value, the second circulating water circuit is selected as the target circulating water circuit. When the first water temperature value and the second water temperature value differ greatly and the first water temperature value is greater than the second water temperature value, the first circulating water circuit is selected as the target circulating water circuit.

[0090] The embodiment of the application can realize air conditioning heating by taking the second circulating water path not flowing through the engine as the heating circuit of the air conditioning system when the engine water temperature value is low. The target circulating circuit is determined by the engine water temperature value and the water temperature value at the outlet of the PTC heater when the engine water temperature value is high, and the target circulating circuit is taken as the heating circuit of the air conditioning system to realize air conditioning heating, which can avoid the engine directly participating in air conditioning heating when the engine water temperature value is low, avoid affecting the heating effect of the air conditioning, and ensure the heating efficiency of the whole vehicle.

[0091] In some embodiments of the application, the "determining the target circulating water path according to the size relationship between the first water temperature value and the second water temperature value" in S103 can include:

[0092] calculating the difference between the first water temperature value and the second water temperature value.

[0093] when the difference is greater than the first preset value, selecting the first circulating water path as the target circulating water path.

[0094] when the difference is less than the second preset value, selecting the second circulating water path as the target circulating water path.

[0095] when the difference is less than or equal to the first preset value and greater than or equal to the second preset value, selecting the current circulating water path of the air conditioning system as the target circulating water path. The first preset value is greater than the second preset value.

[0096] when the difference between the engine water temperature value and the PTC heater water temperature value is greater than the first preset value, selecting the first circulating water path as the target circulating water path.

[0097] when the difference between the engine water temperature value and the PTC heater water temperature value is less than the second preset value, selecting the second circulating water path as the target circulating water path.

[0098] when the current target circulating water path is the first circulating water path, the difference also changes with time, if the difference is less than or equal to the first preset value and greater than or equal to the second preset value, the first circulating water path is continuously selected as the target circulating water path, and the water path is not switched.

[0099] when the current target circulating water path is the second circulating water path, the difference also changes with time, if the difference is less than or equal to the first preset value and greater than or equal to the second preset value, the second circulating water path is continuously selected as the target circulating water path, and the water path is not switched.

[0100] The above-mentioned switching of the circulating water path according to the difference, and the state of the circulating water path is maintained unchanged when the difference is within a certain range, and the switching of the circulating water path is not performed, which can avoid frequent switching of the circulating water path and maintain the state stable under the premise of ensuring heating.

[0101] In some embodiments of the application, when the air conditioner of the hybrid vehicle is in a heating mode, the method further comprises:

[0102] determining a start-stop state of the engine.

[0103] Correspondingly, the "determining the target circulating water path according to the size relationship between the first water temperature value and the second water temperature value" in S103 can include:

[0104] determining a switching threshold of the air conditioning system according to the start-stop state of the engine and the second water temperature value.

[0105] determining the target circulating water path according to the size relationship between the first water temperature value and the switching threshold.

[0106] When the air conditioner has a heating demand, the start-stop state of the engine can be determined first, and different switching thresholds of the air conditioning system are set according to different start-stop states. Then, the size relationship between the first water temperature value and the different switching thresholds determines the target circulating water path.

[0107] Specifically, if the engine is in a start state, the second water temperature value is compensated based on a first compensation temperature value, and the compensated second water temperature value is used as the switching threshold of the air conditioning system.

[0108] If the engine is in a stop state, after starting the engine, the second water temperature value is compensated based on a second compensation temperature value, and the compensated second water temperature value is used as the switching threshold of the air conditioning system. The first compensation temperature value is less than the second compensation temperature value.

[0109] The sum of the first compensation temperature value and the second water temperature value can be calculated, and the sum is used as the switching threshold of the air conditioning system in the engine start state. In addition, the sum of the second compensation temperature and the second water temperature value is calculated, and the sum is used as the switching threshold of the air conditioning system after the engine is started.

[0110] In actual application, considering that the water temperature value of the engine in a continuous start state is generally higher than the water temperature value of the engine after starting from a stop state, the first compensation temperature value is set to be less than the second compensation temperature value in the embodiments of the application, so as to increase the switching threshold of the air conditioning system after the engine is started from a stop state. This can avoid the engine from joining the circulation too early, ensure the heating efficiency of the air conditioning system, and adapt to different working conditions of the engine.

[0111] In the embodiments of the application, the switching threshold of the air conditioning system includes a first switching low value and a first switching high value, and the first compensation temperature value includes a first compensation low value and a first compensation high value.

[0112] The first switching low value is a sum of the second water temperature value and the first compensation low value, and the first switching high value is a sum of the second water temperature value and the first compensation high value.

[0113] The switching threshold of the air conditioning system includes a second switching low value and a second switching high value, and the second compensation temperature value includes a second compensation low value and a second compensation high value.

[0114] The second switching low value is a sum of the second water temperature value and the second compensation low value, and the second switching high value is a sum of the second water temperature value and the second compensation high value.

[0115] The first compensation low value is less than the second compensation low value, the first compensation high value is less than the second compensation high value, the first compensation low value is less than the first compensation high value, and the second compensation low value is less than the second compensation high value.

[0116] Specifically, when the first compensation temperature value includes a first compensation low value and a first compensation high value, and the switching threshold of the air conditioning system includes a first switching low value and a first switching high value, the specific calculation relationship can be as follows:

[0117] The first switching low value is equal to the second water temperature value plus the first compensation low value.

[0118] The first switching high value is equal to the second water temperature value plus the first compensation high value.

[0119] When the first water temperature value is less than the first switching low value, the second circulating water circuit is selected as the target circulating water circuit.

[0120] When the first water temperature value is greater than the first switching high value, the first circulating water circuit is selected as the target circulating water circuit.

[0121] When the first water temperature value is greater than or equal to the first switching low value and less than or equal to the first switching high value, the current circulating water circuit of the air conditioning system is selected as the target circulating water circuit.

[0122] When the current target circulating water circuit is the first circulating water circuit, the first water temperature value may gradually increase over time. If the first water temperature value rises to a range greater than or equal to the first switching low value and less than or equal to the first switching high value, the first circulating water circuit is continuously selected as the target circulating water circuit, and the water circuit is not switched. When the first water temperature value rises to be greater than the first switching high value, the second circulating water circuit is switched to the first circulating water circuit.

[0123] When the current target circulating water path is the second circulating water path, with time changing, after meeting the heating demand, the engine can be stopped, the first water temperature value can gradually decrease, if the first water temperature value decreases to less than or equal to the first switching high value and greater than or equal to the first switching low value, the second circulating water path is continuously selected as the target circulating water path, and the switching of the water path is not performed. When the first water temperature value decreases to less than the first switching low value, the first circulating water path is switched to the second circulating water path.

[0124] Exemplarily, Figure 3 is a state switching schematic diagram of the engine in a starting state provided by the embodiment of the present application, as Figure 3 indicated, the first switching low value = the second water temperature value - 10℃, and the first switching high value = the second water temperature value - 5℃.

[0125] When the first water temperature value > the second water temperature value - 5℃, the first circulating water path is selected as the target circulating water path, that is, the first circulating water path is switched through the three-way water valve.

[0126] When the first water temperature value < the second water temperature value - 10℃, the second circulating water path is selected as the target circulating water path, that is, the second circulating water path is switched through the three-way water valve.

[0127] When the second water temperature value - 10℃ ≤ the first water temperature value ≤ the second water temperature value - 5℃, the circulating water path is maintained, that is, the state of the last three-way water valve is maintained.

[0128] Specifically, when the second compensation temperature can include a second compensation low value and a second compensation high value, and the switching threshold of the air conditioning system can include a second switching low value and a second switching high value, the specific calculation relationship can be as follows:

[0129] The second switching low value = the second water temperature value + the second compensation low value.

[0130] The second switching high value = the second water temperature value + the second compensation high value.

[0131] When the first water temperature value is less than the second switching low value, the second circulating water path is selected as the target circulating water path.

[0132] When the first water temperature value is greater than the second switching high value, the first circulating water path is selected as the target circulating water path.

[0133] When the first water temperature value is greater than or equal to the second switching low value and less than or equal to the second switching high value, the current circulating water path of the air conditioning system is selected as the target circulating water path.

[0134] When the current target circulating water path is the first circulating water path, the first water temperature value can gradually increase over time. If the first water temperature value increases to a range greater than or equal to the second switching low value and less than or equal to the second switching high value, the first circulating water path is continuously selected as the target circulating water path, and the water path is not switched. When the first water temperature value is greater than the second switching high value, the second circulating water path is switched to the first circulating water path.

[0135] When the current target circulating water path is the second circulating water path, the first water temperature value can gradually decrease after meeting the heating demand. If the first water temperature value decreases to a range greater than or equal to the second switching low value and less than or equal to the second switching high value, the second circulating water path is continuously selected as the target circulating water path, and the water path is not switched. When the first water temperature value is less than the first switching low value, the first circulating water path is switched to the second circulating water path.

[0136] An example is shown in FIG. 1. Figure 4 FIG. 2 shows a state switching schematic diagram of an engine in a non-starting state according to an embodiment of the present application. Figure 4 As shown in FIG. 2, the second switching low value is equal to the second water temperature value + 5°C, and the second switching high value is equal to the second water temperature value + 10°C.

[0137] When the first water temperature value is greater than the second water temperature value + 10°C, the first circulating water path is selected as the target circulating water path, that is, the first circulating water path is switched through the three-way water valve.

[0138] When the first water temperature value is less than the second water temperature value + 5°C, the second circulating water path is selected as the target circulating water path, that is, the second circulating water path is switched through the three-way water valve.

[0139] When the second water temperature value + 5°C ≤ the first water temperature value ≤ the second water temperature value + 10°C, the circulating water path is maintained, that is, the state of the three-way water valve is maintained.

[0140] In some scenarios, such as urban scenarios or short-distance travel scenarios, the engine of the hybrid electric vehicle can not be started, the hybrid electric vehicle is in pure electric mode, and the air conditioning system is generally heated by the second circulating water path. In a cold environment, the small circulating water path is difficult to meet the vehicle heating demand, and the engine needs to be started to participate in heating.

[0141] However, if the engine is started and the engine directly participates in heating, the engine may absorb part of the heat due to the low current water temperature value of the engine, thereby affecting the heating efficiency of the vehicle. Therefore, the engine is started, and the engine participates in heating after the water temperature of the engine is increased to a certain temperature, thereby ensuring the heating effect of the vehicle.

[0142] Further, the second water temperature value is compensated differently according to the start-stop state of the engine in the embodiments of the present application, and then different switching thresholds are determined, which can adapt to the states of different engines compared with a single threshold. Moreover, when the engine water temperature is close to or higher than the PTC heater outlet water temperature, the first circulation loop is switched, which can save energy and avoid energy loss.

[0143] In some embodiments of the present application, the control method can further include:

[0144] Detecting whether the air conditioner is power limited.

[0145] When the air conditioner is not power limited, controlling the start-stop of the engine according to the size relationship between the second water temperature value and the target temperature, the target temperature being the final target temperature preset by the air conditioning system.

[0146] When the air conditioner is power limited, controlling the start-stop of the engine according to the size relationship between the first water temperature value and the target temperature.

[0147] When the vehicle central control detects that the air conditioner is power limited, the start-stop of the engine can be controlled according to the size relationship between the first water temperature value and the target temperature, the target temperature being the final target temperature preset by the air conditioning system. For example, when the first water temperature value is less than the target temperature, the engine can be requested to start. When the first water temperature value is greater than or equal to the target temperature, the engine can not be requested to start.

[0148] When the vehicle central control detects that the air conditioner is not power limited, the start-stop of the engine can be controlled according to the size relationship between the second water temperature value and the target temperature. For example, when the second water temperature value is less than the target temperature, the engine can be requested to start. When the second water temperature value is greater than or equal to the target temperature, the engine can not be requested to start.

[0149] For example, Figure 5 is a schematic diagram of an engine start-stop control process provided by the embodiments of the present application, as shown in Figure 5 The specific control logic is as follows:

[0150] Detecting whether the air conditioner is power limited;

[0151] When the air conditioner is power limited:

[0152] If the first water temperature value is less than the target temperature-5℃, the engine is requested to start. If the first water temperature value is greater than or equal to the target temperature-5℃, the engine is not requested to start.

[0153] When the air conditioner is not power limited:

[0154] Starting the PTC heater and starting a 10min timer;

[0155] If the target temperature-second water temperature value > 30℃, the engine start is requested; if the first water temperature value-second water temperature value ≤ 30℃, the engine start is not requested.

[0156] After the engine start is requested: if the first water temperature value=target temperature or the first circulation water circuit is currently present, the engine start is stopped to be requested.

[0157] The application embodiment detects whether the air conditioner power is limited, and determines the engine start-stop logic according to the first water temperature value, the second water temperature value and the target water temperature, so that the engine can be started and stopped more reasonably, the engine is prevented from being frequently started and stopped, and the service life of the engine is ensured.

[0158] In some embodiments of the application, the control method further comprises:

[0159] Controlling the start-stop of the PTC heater according to the size relationship between the second water temperature value and the target temperature, the target temperature being the final standard temperature preset by the air conditioning system;

[0160] After the PTC heater stops heating, controlling the opening of the temperature damper of the hybrid electric vehicle according to the size relationship between the second water temperature value and the target temperature, the target temperature being the final standard temperature preset by the air conditioning system.

[0161] Optionally, when the second water temperature value is greater than or equal to the target temperature, the PTC heater is controlled to stop heating. When the second water temperature value is less than the target temperature, the PTC heater is controlled to start heating.

[0162] Alternatively, a heating difference value of the second water temperature value and the target temperature is calculated. When the heating difference value is greater than a first preset heating difference value, the PTC heater is controlled to stop working; when the heating difference value is less than a second preset heating difference value, the PTC heater is controlled to start working. When the heating difference value is greater than or equal to the second preset heating difference value and less than or equal to the first preset heating difference value, the PTC heater is controlled to maintain the last state, which includes the working state or the stop working state.

[0163] Exemplarily, Figure 6 is a PTC heater start-stop control process schematic diagram provided by the application embodiment, as Figure 6 shown, the specific control logic can be as follows:

[0164] When the second water temperature value > target temperature+2℃, the PTC is controlled to stop working;

[0165] When the second water temperature value < target temperature-2℃, the PTC is controlled to start working.

[0166] After meeting the heating demand, the PTC heater can be controlled to stop heating, at which time the residual heat of the first circulating water circuit or the second circulating water circuit can be used to maintain the temperature. After the PTC heater stops working, the temperature at the output end of the PTC heater will continuously decrease over time. In order to avoid frequent triggering of the PTC heater start-stop, the heat in the circulating water circuit can be dissipated by adjusting the opening of the temperature damper to maintain the output temperature of the air conditioner.

[0167] Specifically, when the second temperature value is less than or equal to the target temperature, the temperature damper can be controlled to be at 100% opening, i.e., the full warm position, so that the heat in the circulating water circuit is fully dissipated. When the second temperature value is greater than the target temperature, the relationship between different second temperature values and temperature damper opening degrees can be determined through pre-calibration, and the temperature damper opening degree can be controlled according to the size of the second water temperature value to maintain the output temperature of the air conditioner and avoid frequent start-stop of the PTC heater.

[0168] The embodiments of the present application realize the start-stop control logic of the PTC heater through the second water temperature value and the target temperature, which can make the PTC heater work fully and avoid overwork, ensure the energy of the whole vehicle, and avoid loss of energy consumption. In addition, the position of the temperature damper is adjusted according to the second temperature value to make the heat in the circulating water circuit fully dissipate and avoid frequent start-stop of the PTC heater, thereby prolonging the heat preservation effect while ensuring that the heating demand of the air conditioner is met.

[0169] In some embodiments of the present application, the control method further comprises:

[0170] detecting a heating mode of the air conditioning system, and determining a target temperature of the air conditioning system according to the heating mode, the target temperature being a preset final standard temperature of the air conditioning system, and the heating mode including a single passenger cabin heating mode, a single battery pack heating mode, and a dual working condition heating mode.

[0171] When the air conditioning system is in the single passenger cabin heating mode, the target temperature is a preset heating temperature of the passenger cabin.

[0172] When the air conditioning system is in the single battery pack heating mode, the target temperature is a preset heating temperature of the battery pack.

[0173] When the air conditioning system is in the dual working condition heating mode, the target temperature is the maximum value of the preset heating temperatures of the passenger cabin and the battery pack.

[0174] Exemplarily, Figure 7 is a schematic diagram of a target temperature selection logic provided by an embodiment of the present application, as Figure 7 shown, the target temperature can be selected according to the heating demand of the air conditioner, specifically as follows:

[0175] determining whether the air conditioner has a heating demand;

[0176] If there is no heating demand, the target temperature is set to -40℃, indicating that the PTC heater cannot be turned on and the engine cannot be requested.

[0177] If there is a heating demand, it is determined whether it is a single-occupant cabin heating mode.

[0178] If it is a single-occupant cabin heating mode, the target temperature is the preset heating temperature of the occupant cabin.

[0179] If it is not a single-occupant cabin heating mode, it is determined whether it is a single-battery pack heating mode.

[0180] If it is a single-battery pack heating mode, the target temperature is the preset heating temperature of the battery pack.

[0181] If it is not a single-battery pack heating mode, it is determined to be a dual-condition heating mode, and the target temperature is the maximum of the preset heating temperatures of the occupant cabin and the battery pack. The dual-condition heating mode is the occupant cabin heating mode + the battery pack heating mode at the same time.

[0182] In the embodiments of the present application, the above-mentioned temperature damper control is applicable to the scenario where the occupant cabin is heated, i.e. to the single-occupant cabin heating mode or the dual-condition heating mode.

[0183] The embodiments of the present application can achieve accurate division of the target temperature by selecting different target temperatures for different heating modes, instead of setting a unified fixed temperature for multiple modes, and can adapt to multiple scenarios, with strong applicability.

[0184] Exemplarily, Figure 8 Another implementation flowchart of the control method of the hybrid electric vehicle provided in the embodiments of the present application is shown in Figure 8 The switching of the first circulating water path and the second circulating water path can be performed by controlling the three-way water valve, and the specific control logic is as follows:

[0185] It is determined whether the air conditioner has a heating demand.

[0186] If there is no heating demand, the three-way water valve is controlled to switch to the second circulating water path.

[0187] If there is a heating demand, the three-way water valve is allowed to switch.

[0188] After allowing the three-way water valve to switch, it is determined whether the engine is started.

[0189] If the engine is started, it is determined whether the water temperature value of the engine (i.e. the first water temperature value) is not lower than 60℃.

[0190] If the first water temperature value is lower than 60℃, the three-way water valve is controlled to switch to the second circulating water path.

[0191] If the first water temperature value is greater than or equal to 60℃, then:

[0192] When the first water temperature value > the water temperature value at the outlet of the PTC heater (i.e. the second water temperature value) - 5℃, the three-way water valve is controlled to switch to the first circulating water path.

[0193] When the first water temperature value < the second water temperature value - 10℃, the three-way water valve is controlled to switch to the second circulating water path.

[0194] When the second water temperature value - 10℃ ≤ the first water temperature value ≤ the second water temperature value - 5℃, the last state of the three-way water valve is maintained, and no switching is performed.

[0195] If the engine is not started, it is determined whether the engine is requested to be started.

[0196] If the engine is requested to be started, it is determined whether the first water temperature value is not lower than 60℃.

[0197] If the first water temperature value < 60℃, the three-way water valve is controlled to switch to the second circulating water path.

[0198] If the first water temperature value ≥ 60℃, then:

[0199] When the first water temperature value > the second water temperature value + 10℃, the three-way water valve is controlled to switch to the first circulating water path.

[0200] When the first water temperature value < the second water temperature value + 5℃, the three-way water valve is controlled to switch to the second circulating water path.

[0201] When the second water temperature value + 5℃ ≤ the first water temperature value ≤ the second water temperature value + 10℃, the last state of the three-way water valve is maintained, and no switching is performed.

[0202] Through the switching mode, the water temperature value of the engine can be prevented from being lower than the water temperature value at the outlet of the PTC heater, the heating load of the air conditioner is prevented from being additionally increased, and energy saving is achieved.

[0203] The application can achieve precise control of the temperature of the circulating water path by establishing a control logic for precisely switching the circulating water path, and combining the start-stop control logic of the PTC heater and the start-stop control logic of the engine. Moreover, the application utilizes the relationship that the actual temperature change of the heat source lags behind the target change of the heat source, and adjusts the temperature damper to utilize the waste heat, thereby achieving the energy saving effect of precise temperature control of the air conditioning system.

[0204] It should be understood that the size of the serial number of each step in the above embodiments does not mean the order of execution, and the execution order of each process should be determined according to its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the application.

[0205] The following is a device embodiment of the application. For details not described in detail, reference can be made to the corresponding method embodiments described above.

[0206] Figure 9 A structure schematic diagram of a control device of a hybrid vehicle is shown, only parts related to the embodiments of the present application are shown for the convenience of description, and the details are as follows:

[0207] As shown in the figure, the control device 20 of the hybrid vehicle, the heating circuit of the air conditioning system in the hybrid vehicle includes a first circulating water circuit and a second circulating water circuit, the first circulating water circuit is a large circulating water circuit flowing through the engine, and the second circulating water circuit is a small circulating water circuit not flowing through the engine. Figure 9

[0208] The control device 20 can include:

[0209] The acquisition module 201 is configured to acquire a first water temperature value when the air conditioner of the hybrid vehicle is in a heating mode, the first water temperature value being a water temperature value of the engine;

[0210] The first selection module 202 is configured to select the second circulating water circuit as the heating circuit of the air conditioning system when the first water temperature value is less than a preset water temperature value;

[0211] The second selection module 203 is configured to determine a target circulating water circuit according to a size relationship between the first water temperature value and a second water temperature value when the first water temperature value is greater than or equal to the preset water temperature value, and select the target circulating water circuit as the heating circuit of the air conditioning system;

[0212] The second water temperature value is a water temperature value at a water outlet of the PTC heater in the hybrid vehicle, and the target circulating water circuit is the first circulating water circuit or the second circulating water circuit.

[0213] In some embodiments of the present application, the second selection module 202 can include:

[0214] The calculation unit is configured to calculate a difference between the first water temperature value and the second water temperature value;

[0215] The first comparison unit is configured to select the first circulating water circuit as the target circulating water circuit when the difference is greater than a first preset value;

[0216] The second comparison unit is configured to select the second circulating water circuit as the target circulating water circuit when the difference is less than a second preset value;

[0217] The third comparison unit is configured to select a current circulating water circuit of the air conditioning system as the target circulating water circuit when the difference is less than or equal to the first preset value and greater than or equal to the second preset value.

[0218] In some embodiments of the present application, the control device 20 can further include:

[0219] ​a judgment module for determining the start / stop state of the engine when the air conditioner of the hybrid vehicle is in a heating mode;

[0220] The second selection module 202 is specifically configured to determine a switching threshold of the air-conditioning system according to the start / stop state of the engine and the second water temperature value; and determine a target circulating water path according to the magnitude relationship between the first water temperature value and the switching threshold value.

[0221] In some embodiments of the present application, the second selection module 202 may include:

[0222] a first compensation unit, configured to compensate the second water temperature value based on the first compensation temperature value if the engine is in a started state, and use the compensated second water temperature value as a switching threshold of the air conditioning system;

[0223] a second compensation unit, configured to compensate the second water temperature value based on the second compensation temperature value after starting the engine if the engine is in a stopped state, and use the compensated second water temperature value as a switching threshold of the air conditioning system;

[0224] wherein the first compensation temperature value is less than the second compensation temperature value;

[0225] In some embodiments of the present application, the switching threshold of the air-conditioning system includes a first switching low value and a first switching high value, and the first compensation temperature value includes a first compensation low value and a first compensation high value;

[0226] The first switching low value is the sum of the second water temperature value and the first compensation low value, and the first switching high value is the sum of the second water temperature value and the first compensation high value;

[0227] And / or, the switching threshold of the air-conditioning system includes a second switching low value and a second switching high value, and the second compensation temperature value includes a second compensation low value and a second compensation high value;

[0228] The second switching low value is the sum of the second water temperature value and the second compensation low value, and the second switching high value is the sum of the second water temperature value and the second compensation high value;

[0229] The first compensation low value is smaller than the second compensation low value, and the first compensation high value is smaller than the second compensation high value.

[0230] In some embodiments of the present application, the control device 20 may further include:

[0231] The first detection module is used to detect whether the air conditioner is power-limited

[0232] a first control module, configured to control the start and stop of the engine according to a relationship between the second water temperature value and a target temperature when the air conditioning power is not limited, wherein the target temperature is a final target temperature preset by the air conditioning system;

[0233] The second control module is configured to control the start-stop of the engine according to a size relationship between the first water temperature value and a target temperature when the power of the air conditioner is limited.

[0234] In some embodiments of the present application, the control device 20 can further include:

[0235] The third control module is configured to control the start-stop of the PTC heater according to a size relationship between the second water temperature value and a target temperature, the target temperature being a final target temperature preset by the air conditioning system.

[0236] The fourth control module is configured to control the opening degree of the temperature damper of the hybrid vehicle according to a size relationship between the second water temperature value and a target temperature after the PTC heater stops heating, the target temperature being a final target temperature preset by the air conditioning system.

[0237] In some embodiments of the present application, the control device 20 can further include:

[0238] The second detection module is configured to detect a heating mode of the air conditioning system, and determine a target temperature of the air conditioning system according to the heating mode, the target temperature being a final target temperature preset by the air conditioning system, and the heating mode including a single passenger cabin heating mode, a single battery pack heating mode, and a dual working condition heating mode.

[0239] The third selection module is configured to, when the air conditioning system is in the single passenger cabin heating mode, set the target temperature as a preset heating temperature of the passenger cabin.

[0240] The fourth selection module is configured to, when the air conditioning system is in the single battery pack heating mode, set the target temperature as a preset heating temperature of the battery pack.

[0241] The fifth selection module is configured to, when the air conditioning system is in the dual working condition heating mode, set the target temperature as a maximum value of preset heating temperatures of the passenger cabin and the battery pack.

[0242] Figure 10 is a schematic diagram of a controller provided by an embodiment of the present application. As shown in Figure 10 the controller 30 of this embodiment includes a processor 300 and a memory 301, and the memory 301 stores a computer program 302 that can run on the processor 300. The processor 300 implements the steps in each of the above-mentioned control method embodiments of the hybrid vehicle when executing the computer program 302, such as Figure 2 S101-S103 shown in the figure. Alternatively, the processor 300 implements the functions of each module / unit in each of the above-mentioned device embodiments when executing the computer program 302, such as Figure 9 the functions of the modules 201-203 shown in the figure.

[0243] For example, the computer program 302 can be divided into one or more modules / units, one or more modules / units are stored in the memory 301 and executed by the processor 300 to complete the present application. One or more modules / units can be a series of computer program instruction segments capable of completing a specific function, which is used to describe the execution process of the computer program 302 in the controller 30. For example, the computer program 302 can be divided into Figure 9 The modules 201 to 203 shown.

[0244] The controller 30 can be an air conditioner controller or an on-board central control of a hybrid vehicle. The controller 30 can include, but is not limited to, the processor 300, the memory 301. Those skilled in the art can understand that the controller 30 can include more or less components than those shown, or combine certain components, or different components, for example, the controller can also include input / output devices, network access devices, buses, etc. Figure 10 The controller 30 shown is only an example and does not constitute a limitation on the controller 30, and can include more or less components than those shown, or combine certain components, or different components, for example, the controller can also include input / output devices, network access devices, buses, etc.

[0245] The processor 300 can be a central processing unit (CPU), and can also be other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor.

[0246] The memory 301 can be an internal storage unit of the controller 30, such as a hard disk or memory of the controller 30. The memory 301 can also be an external storage device of the controller 30, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. Further, the memory 301 can include both the internal storage unit and the external storage device of the controller 30. The memory 301 is used to store computer programs and other programs and data required by the controller. The memory 301 can also be used to temporarily store data that has been output or will be output.

[0247] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the division of the above functional units and modules is taken as an example, and in actual application, the above functions can be completed by different functional units and modules according to needs, that is, the internal structure of the device is divided into different functional units or modules to complete all or part of the functions described above. Each functional unit and module in the embodiment can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of software functional unit. In addition, the specific names of each functional unit and module are only for the convenience of mutual distinction, and do not limit the protection scope of the present application. The specific working process of the units and modules in the above system can refer to the corresponding process in the foregoing method embodiments, which will not be described here.

[0248] The embodiment of the present application also provides a vehicle comprising the controller 30 as above. The vehicle can be a hybrid vehicle.

[0249] In the above embodiments, the description of each embodiment has its own emphasis, and the parts not described or recorded in detail in a certain embodiment can be referred to the related description of other embodiments.

[0250] Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in connection with the embodiments disclosed herein can be realized in electronic hardware, or in a combination of computer software and electronic hardware. Whether the functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0251] In the embodiments provided in the present application, it should be understood that the disclosed devices / controllers and methods can be implemented in other ways. For example, the device / controller embodiments described above are only schematic. For example, the division of modules or units is only a logical function division, and actual implementation can have another division manner. For example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units or components shown or discussed can be indirect coupling or communication connection through some interface, device or unit, and can be electrical, mechanical or other forms.

[0252] The units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, i.e. may be located in one place, or may be distributed on multiple network units. Part or all of the units may be selected according to actual needs to achieve the purpose of the embodiment scheme.

[0253] In addition, each functional unit in each embodiment of the present application can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of a software functional unit.

[0254] If the integrated module / unit is realized in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on this understanding, all or part of the processes in the above-mentioned embodiment methods can also be completed by a computer program instructing related hardware, and the computer program can be stored in a computer readable storage medium. When the processor executes the computer program, the steps of each hybrid vehicle control method embodiment described above can be implemented. The computer program includes computer program code, which can be in the form of source code, object code, executable files or some intermediate forms, etc. The computer readable medium can include any entity or device capable of carrying computer program code, recording medium, U disk, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electric carrier signal, telecommunication signal and software distribution medium, etc.

[0255] The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A control method for a hybrid electric vehicle, characterized in that: The heating circuit of the air conditioning system in the hybrid vehicle includes a first circulating water circuit and a second circulating water circuit, wherein the first circulating water circuit is a large circulating water circuit that flows through the engine, and the second circulating water circuit is a small circulating water circuit that does not flow through the engine; The control method includes: When the air conditioner of the hybrid vehicle is in a heating mode, obtaining a first water temperature value, the first water temperature value being a water temperature value of the engine; When the first water temperature value is lower than a preset water temperature value, selecting the second circulating water circuit as a heating circuit of the air-conditioning system; When the first water temperature value is greater than or equal to a preset water temperature value, determining a target circulating water path according to a magnitude relationship between the first water temperature value and the second water temperature value, and using the target circulating water path as a heating circuit of the air-conditioning system; determining the target circulating water path according to the magnitude relationship between the first water temperature value and the second water temperature value includes: Calculating a difference between the first water temperature value and the second water temperature value; When the difference is greater than a first preset value, selecting the first circulating waterway as the target circulating waterway; When the difference is less than a second preset value, selecting the second circulating waterway as the target circulating waterway; When the difference is less than or equal to the first preset value and greater than or equal to the second preset value, selecting the current circulating water path of the air-conditioning system as the target circulating water path; The second water temperature value is the water temperature value of the water outlet of the PTC heater in the hybrid electric vehicle, and the target circulating water path is the first circulating water path or the second circulating water path.

2. The control method of a hybrid vehicle according to claim 1, characterized in that: When the air conditioner of the hybrid vehicle is in a heating mode, the method further includes: determining a start / stop state of the engine; Accordingly, determining the target circulating water path according to the magnitude relationship between the first water temperature value and the second water temperature value includes: determining a switching threshold of the air conditioning system according to the start / stop state of the engine and the second water temperature value; The target circulating water path is determined according to the magnitude relationship between the first water temperature value and the switching threshold.

3. The control method of a hybrid vehicle according to claim 2, characterized in that: The step of determining the switching threshold of the air conditioning system according to the start / stop state of the engine and the second water temperature value includes: If the engine is in the started state, compensating the second water temperature value based on the first compensation temperature value, and using the compensated second water temperature value as the switching threshold of the air conditioning system; If the engine is in a stopped state, after starting the engine, the second water temperature value is compensated based on the second compensation temperature value, and the compensated second water temperature value is used as the switching threshold of the air conditioning system; The first compensation temperature value is smaller than the second compensation temperature value.

4. The control method of a hybrid vehicle according to claim 3, characterized in that: The switching threshold of the air-conditioning system includes a first switching low value and a first switching high value, and the first compensation temperature value includes a first compensation low value and a first compensation high value; Wherein, the first switching low value is the sum of the second water temperature value and the first compensation low value, and the first switching high value is the sum of the second water temperature value and the first compensation high value; And / or, the switching threshold of the air-conditioning system includes a second switching low value and a second switching high value, and the second compensation temperature value includes a second compensation low value and a second compensation high value; The second switching low value is the sum of the second water temperature value and the second compensation low value, and the second switching high value is the sum of the second water temperature value and the second compensation high value; The first compensation low value is smaller than the second compensation low value, and the first compensation high value is smaller than the second compensation high value.

5. The control method of a hybrid vehicle according to claim 2, characterized in that: The method further comprises: Detecting whether the air conditioner is power-limited; When the air conditioning power is not limited, the engine start and stop are controlled according to the relationship between the second water temperature value and the target temperature, where the target temperature is a final target temperature preset by the air conditioning system; When the air-conditioning power is limited, the start and stop of the engine are controlled according to the relationship between the first water temperature value and the target temperature.

6. The control method of a hybrid vehicle according to claim 1, characterized in that: The method further comprises: Controlling the start and stop of the PTC heater according to the relationship between the second water temperature value and a target temperature, wherein the target temperature is a final target temperature preset by the air conditioning system; After the PTC heater stops heating, the opening of the temperature damper of the hybrid vehicle is controlled according to the relationship between the second water temperature value and the target temperature, and the target temperature is the final target temperature preset by the air conditioning system.

7. The control method of a hybrid vehicle according to claim 1, characterized in that: The method further comprises: detecting a heating mode of the air conditioning system and determining a target temperature of the air conditioning system based on the heating mode, the target temperature being a preset final target temperature of the air conditioning system, the heating modes including a single passenger compartment heating mode, a single battery pack heating mode, and a dual-mode heating mode; When the air conditioning system is in a single passenger compartment heating mode, the target temperature is a preset heating temperature of the passenger compartment; When the air conditioning system is in a single battery pack heating mode, the target temperature is a preset heating temperature of the battery pack; When the air-conditioning system is in the dual-mode heating mode, the target temperature is the maximum value of the preset heating temperatures in the passenger compartment and the battery pack.

8. A controller comprising a memory and a processor, wherein the memory stores a computer program that can be run on the processor, characterized in that: When the processor executes the computer program, the steps of the hybrid vehicle control method according to any one of claims 1 to 7 are implemented.

9. A vehicle, characterized in that: Comprising the controller as claimed in claim 8.

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