Control method and device based on engine waste heat utilization, hybrid vehicle and storage medium

Abstract

The application provides a control method and device based on engine waste heat utilization, a hybrid vehicle and a storage medium, and belongs to the technical field of vehicle control. The control method based on engine waste heat utilization is applied to a hybrid vehicle. A heat exchange device in the hybrid vehicle is connected to a circulating water circuit of an engine of the hybrid vehicle. The control method based on engine waste heat utilization comprises the following steps: obtaining an operating state of the engine; if the engine is in the operating state, controlling an electronic water pump in the circulating water circuit based on a preset first MAP (Mapping) to transmit waste heat of the engine to the heat exchange device; if the engine is in a shutdown state, obtaining a water temperature of the engine; if the water temperature of the engine is not lower than a preset temperature, controlling the circulating water circuit to operate in a small cycle, and controlling the electronic water pump in the circulating water circuit based on a preset second MAP to transmit the waste heat of the engine to the heat exchange device. The application can effectively improve the energy utilization rate of the engine.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of vehicle control, and more particularly relates to a control method and device based on engine waste heat utilization, a hybrid vehicle, and a storage medium. BACKGROUND

[0002] At present, in order to ensure that the heating demand of the vehicle can be met when the engine is stopped, the hybrid vehicle directly uses an electric heating device to supply heat. However, this method results in that, during normal operation of the engine, the heat generated by the engine is directly taken away by the cooling water and the radiator, and when the engine is stopped, the engine waste heat is slowly exchanged to the air, thereby wasting part of the engine energy.

[0003] Therefore, the engine energy utilization rate of the existing hybrid vehicle is low. SUMMARY

[0004] The present application aims to provide a control method and device based on engine waste heat utilization, a hybrid vehicle, and a storage medium, so as to solve the problem of low engine energy utilization rate of the hybrid vehicle in the prior art.

[0005] In a first aspect, the present application provides a control method based on engine waste heat utilization, which is applied to a hybrid vehicle. A heat exchange device in the hybrid vehicle is connected to a circulating water circuit of an engine in the hybrid vehicle. The control method based on engine waste heat utilization comprises the following steps.

[0006] Obtaining an operating state of the engine;

[0007] If the engine is in the operating state, an electronic water pump in the circulating water circuit is controlled based on a preset first MAP diagram to transmit the engine waste heat to the heat exchange device;

[0008] If the engine is in the stopped state, the water temperature of the engine is obtained;

[0009] If the water temperature of the engine is not lower than a preset temperature, the circulating water circuit is controlled to operate in a small cycle, and the electronic water pump in the circulating water circuit is controlled based on a preset second MAP diagram to transmit the engine waste heat to the heat exchange device.

[0010] In a possible implementation manner, the heat exchange device comprises a core of an engine heater, the hybrid vehicle comprises an electric heater, and the engine heater and the electric heater are both used to supply heat to a cockpit of the hybrid vehicle. After the engine waste heat is transmitted to the core of the engine heater, the control method based on engine waste heat utilization further comprises the following steps.

[0011] detecting whether the heating temperature provided by the engine heater reaches a preset temperature of the user after the user starts the heating of the cockpit;

[0012] controlling the electric heater to be turned on to assist in increasing the heating temperature if the heating temperature provided by the engine heater does not reach the preset temperature of the user.

[0013] In a possible implementation, the control method based on the utilization of the engine waste heat further includes:

[0014] controlling the electric heater to be turned on if the water temperature of the engine is lower than the preset temperature after the user starts the heating of the cockpit.

[0015] In a possible implementation, the heat exchange device includes a battery pack heat exchanger, and the hybrid vehicle includes a battery pack heating and cooling device, both of which are used to heat the battery pack in the hybrid vehicle; after the waste heat of the engine is transmitted to the core of the battery pack heat exchanger, the control method based on the utilization of the engine waste heat further includes:

[0016] detecting whether the heating temperature provided by the battery pack heat exchanger reaches a required temperature of the battery pack when the battery pack of the hybrid vehicle needs to be heated;

[0017] controlling the battery pack heating and cooling device to be turned on to assist in increasing the heating temperature if the heating temperature provided by the battery pack heat exchanger does not reach the required temperature of the battery pack.

[0018] In a possible implementation, the control method based on the utilization of the engine waste heat further includes:

[0019] controlling the battery pack heating and cooling device to be turned on if the water temperature of the engine is lower than the preset temperature when the battery pack of the hybrid vehicle needs to be heated.

[0020] In a possible implementation, the first MAP map takes the target water temperature of the engine as a control target, and the second MAP map takes the required temperature of the corresponding heating object of the heat exchange device as a control target.

[0021] In a possible implementation, the circulating water circuit further includes an electronic ball valve, which is used to cut off the water circulation of a target branch of the circulating water circuit when the engine is in a shutdown state, where the target branch refers to a branch other than the branch in which the heat exchange device is located.

[0022] After the circulating water circuit is controlled to operate in a small circulation mode, the control method based on the utilization of the engine waste heat further includes:

[0023] The electronic ball valve controls the water circulation of the target branch in the circulating water circuit.

[0024] In a second aspect, the application provides a control device based on engine waste heat utilization, which is applied to a hybrid vehicle, a heat exchange device in the hybrid vehicle being connected to a circulating water circuit of an engine in the hybrid vehicle; the control device based on engine waste heat utilization comprises:

[0025] a data acquisition module, configured to acquire an operating state of the engine and a water temperature of the engine when the engine is in a shutdown state;

[0026] a control module, configured to control an electronic water pump in the circulating water circuit to transmit waste heat of the engine to the heat exchange device based on a preset first MAP (Mapping) when the engine is in an operating state; and control the circulating water circuit to operate in a small cycle and control the electronic water pump in the circulating water circuit to transmit waste heat of the engine to the heat exchange device based on a preset second MAP when the engine is in a shutdown state and the water temperature of the engine is not lower than a preset temperature.

[0027] In a third aspect, the application provides a hybrid vehicle, which comprises a control terminal, the control terminal comprising a memory, a processor and a computer program stored in the memory and executable on the processor, and the processor implements the steps of the control method based on engine waste heat utilization when executing the computer program.

[0028] In a fourth aspect, the application provides a computer readable storage medium, which stores a computer program, and the computer program implements the steps of the control method based on engine waste heat utilization when executed by a processor.

[0029] The control method and device based on engine waste heat utilization, the hybrid vehicle and the storage medium provided by the application have the following advantages:

[0030] Different from the scheme of directly using the electric heating device to heat in the prior art, the embodiment of the present application provides a control scheme for waste heat utilization under different operating states of the engine, that is, the heat exchange device capable of heat exchange on the hybrid vehicle is connected to the circulating water circuit of the engine. On this basis, when the engine is in the operating state, the electronic water pump in the circulating water circuit of the engine is controlled according to the first MAP graph, at this time, the circulating water in the circulating water circuit passes through the heat exchange device, and the heat exchange device can provide the waste heat of the engine to the corresponding heat supply object through the heat exchange function. On this basis, when the engine is in the shutdown state, the water temperature of the engine is obtained, when the water temperature of the engine is high, the circulating water circuit is controlled to operate in a small cycle, so as to effectively reduce the waste of the waste heat of the engine, and on this basis, the electronic water pump is controlled according to the second MAP graph, at this time, the circulating water in the circulating water circuit passes through the heat exchange device, and the heat exchange device can provide the waste heat of the engine to the corresponding heat supply object through the heat exchange function.

[0031] That is, whether the engine is in the operating state or the shutdown state, the waste heat of the engine can be fully utilized in the embodiment of the present application, and the waste of engine energy is avoided, so that the problem of the prior art is effectively solved, and the energy utilization rate of the engine of the hybrid vehicle is improved. BRIEF DESCRIPTION OF DRAWINGS

[0032] 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 below. 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.

[0033] Figure 1 The flowchart of the control method based on engine waste heat utilization provided by an embodiment of the present application is shown in the figure.

[0034] Figure 2 The schematic diagram of the engine circulating water circuit provided by an embodiment of the present application is shown in the figure.

[0035] Figure 3 The heating schematic diagram based on engine waste heat utilization provided by an embodiment of the present application is shown in the figure.

[0036] Figure 4 The structural block diagram of the control device based on engine waste heat utilization provided by an embodiment of the present application is shown in the figure.

[0037] Figure 5 The schematic block diagram of the control terminal provided by an embodiment of the present application is shown in the figure. DETAILED DESCRIPTION

[0038] In the following description, for purposes of explanation and not limitation, specific details are set forth such as particular architectures, technologies, techniques, etc. in order to provide 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 can be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.

[0039] In order to make the objects, technical solutions and advantages of the present application clearer, the following will be described in conjunction with the accompanying drawings and specific embodiments.

[0040] First of all, it needs to be pointed out that the control method based on engine waste heat utilization provided by the present application is applied to a hybrid vehicle, and the heat exchange equipment in the hybrid vehicle is connected to the circulating water path of the engine of the hybrid vehicle. The heat exchange equipment refers to the equipment that can exchange or utilize heat in the hybrid vehicle. The circulating water path of the engine refers to the circulating water path of the cooling system of the engine. After connecting the heat exchange equipment to the circulating water path of the engine, when the circulating water path circulates water, the circulating water of the circulating water path will pass through the heat exchange equipment, and at this time, the heat exchange equipment can utilize the waste heat of the engine in the circulating water to provide the waste heat of the engine to the corresponding heat supply object. The heat exchange equipment is a functional description, which can be one equipment, or can include two equipment, or can include multiple equipment, and the present application does not limit this.

[0041] Based on the above premise, please refer to Figure 1 , Figure 1 The flowchart of the control method based on engine waste heat utilization provided by an embodiment of the present application, the control method based on engine waste heat utilization includes:

[0042] S101: Obtain the operating state of the engine.

[0043] In this embodiment, the operating state of the engine includes two kinds, one is the operating state (that is, the engine is in the operating state), and the other is the shutdown state.

[0044] S102: If the engine is in the operating state, control the electronic water pump in the circulating water path based on the preset first MAP to transmit the waste heat of the engine to the heat exchange equipment.

[0045] In this embodiment, when the engine is in the operating state, it can continuously generate heat, and at this time, the electronic water pump in the circulating water path can be controlled based on the preset first MAP to control the operation of the circulating water path, to ensure the heat dissipation of the engine while transmitting the waste heat of the engine to the heat exchange equipment, so that the heat exchange equipment can utilize the waste heat of the engine to heat the corresponding heat supply object.

[0046] S103: If the engine is in a shutdown state, obtain the water temperature of the engine.

[0047] S104: If the water temperature of the engine is not lower than a preset temperature, control the circulating water circuit to operate in a small circulation mode, and control the electronic water pump in the circulating water circuit based on a preset second MAP map to transmit the waste heat of the engine to the heat exchange device.

[0048] In the prior art, after the engine is shut down, the electronic water pump is usually not controlled too much. However, the embodiment considers that even if the engine is shut down, the temperature of the engine cooling water will not suddenly decrease in a short time, so the water temperature of the engine can be obtained after the water temperature of the engine is detected, and when the water temperature of the engine is large (that is, when the water temperature of the engine is not lower than a preset temperature), the circulating water circuit of the engine is controlled to operate in a small circulation mode, at this time, the circulating water of the engine will not enter the radiator, and the waste heat of the engine can be retained as much as possible. On this basis, the electronic water pump in the circulating water circuit is controlled by the preset second MAP map, so that the waste heat of the engine can be transmitted to the heat exchange device, so that the heat exchange device can utilize the waste heat of the engine to heat the corresponding heat supply object.

[0049] In the embodiment, the control of the circulating water circuit to operate in a small circulation mode can be realized by controlling the electronic thermostat in the engine circulating water circuit.

[0050] In the embodiment, the first MAP map and the second MAP map are both pre-calibrated or pre-designed. The control targets of the first MAP map and the second MAP map are different, the control of the first MAP map is mainly for heat dissipation of the engine, and the control of the second MAP map is mainly for transmitting waste heat to the heat exchange device as much as possible.

[0051] In the embodiment, after the waste heat of the engine is transmitted to the heat exchange device, the control method based on the utilization of the waste heat of the engine can further include:

[0052] In response to the heat supply demand of the heat supply object corresponding to the heat exchange device, it is detected whether the heat supply temperature provided by the heat exchange device reaches the demand temperature of the heat supply demand.

[0053] If the heat supply temperature provided by the heat exchange device does not reach the demand temperature of the heat supply demand, the electric heat supply device corresponding to the heat supply object is controlled to be turned on to assist in increasing the heat supply temperature.

[0054] Based on the scheme of the embodiment, reliable heat supply to the corresponding heat supply object can be realized.

[0055] In the embodiment, the control method based on the utilization of the waste heat of the engine can further include:

[0056] If the water temperature of the engine is lower than the preset temperature, the electric heating device corresponding to the heating object is directly controlled to be turned on after detecting the heating demand of the heating object corresponding to the heat exchange device.

[0057] That is, if the engine is in the shutdown state and the water temperature of the engine is low (lower than the preset temperature), it indicates that there is no waste heat available for use, and at this time, the electric heating device corresponding to the heating object can be directly controlled to realize rapid and reliable heating of the corresponding heating object while saving control costs.

[0058] From the above description, it can be seen that, unlike the prior art scheme of directly using an electric heating device for heating, the embodiment of the present application provides a control scheme for waste heat utilization under different operating states of the engine, that is, the heat exchange device on the hybrid vehicle that can exchange heat is connected to the circulating water circuit of the engine, and on this basis, when the engine is in the operating state, the electronic water pump in the circulating water circuit is controlled according to the first MAP graph, at this time, the circulating water in the circulating water circuit passes through the heat exchange device, and the heat exchange device can provide waste heat of the engine to the corresponding heating object through its heat exchange function. On this basis, when the engine is in the shutdown state, the water temperature of the engine is obtained, when the water temperature of the engine is high, the circulating water circuit is controlled to operate in a small cycle, thereby effectively reducing the waste of engine waste heat, and on this basis, the electronic water pump is controlled according to the second MAP graph, at this time, the circulating water in the circulating water circuit passes through the heat exchange device, and the heat exchange device can provide waste heat of the engine to the corresponding heating object through its heat exchange function. That is, whether the engine is in the operating state or the shutdown state, the engine waste heat can be fully utilized in the embodiment of the present application, avoiding the waste of engine energy, thereby effectively solving the problem of the prior art and improving the energy utilization rate of the engine of the hybrid vehicle.

[0059] In a possible implementation, the heat exchange device can include a core of an engine heater, and the hybrid vehicle includes an electric heater, and the engine heater and the electric heater are used to heat the cabin of the hybrid vehicle. After the waste heat of the engine is transmitted to the core of the engine heater, the control method based on the utilization of the engine waste heat further includes:

[0060] After the user starts the heating of the cabin, it is detected whether the heating temperature provided by the engine heater reaches the temperature preset by the user.

[0061] If the heating temperature provided by the engine heater does not reach the temperature preset by the user, the electric heater is controlled to be turned on to assist in increasing the heating temperature.

[0062] In the embodiment, the heat exchange device can include a core of an engine heater, and the heat supply object corresponding to the heat exchange device is a user in the cabin, and the electric heat supply device corresponding to the heat supply object is an electric heater. On this basis, after the user starts the heat supply function by triggering the corresponding button, it can be detected whether the heat supply temperature provided by the engine heater reaches the temperature required by the user (i.e., the temperature preset by the user), that is, whether the waste heat of the engine can support the heating demand of the user. On this basis, if the waste heat of the engine cannot support the heating demand of the user, that is, the heat supply temperature provided by the engine heater does not reach the temperature preset by the user, the electric heater can be controlled to be turned on to assist in supplying heat to the user to meet the heating demand of the user.

[0063] In the embodiment, after the electric heater is controlled to be turned on, the electric heater can be operated in a PID (Proportion-Integral-Derivative Controller) manner. For example, a temperature difference between the heat supply temperature provided by the engine heater and the temperature preset by the user can be obtained, the temperature difference is input into a preset PID controller to obtain a control parameter of the electric heater, and then the operation of the electric heater is controlled based on the control parameter.

[0064] That is, the waste heat of the engine can be preferentially used to heat the user in the cabin. If the waste heat of the engine can support the heating demand of the user, the waste heat of the engine is directly used to heat the user in the cabin. If the waste heat of the engine cannot support the heating demand of the user, the electric heater independent of the waste heat of the engine can be used to heat the user in the cabin.

[0065] In a possible implementation, the control method based on the utilization of the waste heat of the engine further includes:

[0066] If the water temperature of the engine is lower than the preset temperature, the electric heater is controlled to be turned on after the user starts the heat supply of the cabin.

[0067] In the embodiment, if the water temperature of the engine is lower than the preset temperature, the electric heater can be directly controlled to be turned on to supply heat to the user when the user has a heating demand.

[0068] In a possible implementation, the heat exchange device can further include a battery pack heat exchanger, and the hybrid vehicle includes a battery pack heating and cooling device. The battery pack heat exchanger and the battery pack heating and cooling device are both used to supply heat to the battery pack in the hybrid vehicle. After the waste heat of the engine is transmitted to the core of the battery pack heat exchanger, the control method based on the utilization of the waste heat of the engine further includes:

[0069] When the battery pack of the hybrid vehicle needs to be heated, it is detected whether the heat supply temperature provided by the battery pack heat exchanger reaches the required temperature of the battery pack.

[0070] If the heating temperature provided by the battery pack heat exchanger cannot reach the required temperature of the battery pack, the battery pack heating cooler is controlled to be turned on to assist in increasing the heating temperature.

[0071] In this embodiment, the heat exchange device can include a battery pack heat exchanger for providing heat to the battery pack in the hybrid vehicle by using the waste heat of the engine. At this time, the heat exchange device corresponds to the battery pack of the hybrid vehicle as the heat supply object, and the battery pack heating cooler corresponds to the electric heating device as the heat supply object. On this basis, when the temperature of the battery pack is detected to be lower than the corresponding threshold temperature, it is determined that the battery pack needs to be heated. At this time, whether the heating temperature provided by the battery pack heat exchanger can reach the required temperature of the battery pack, that is, whether the waste heat of the engine can support the heating demand of the battery pack is detected. On this basis, if the waste heat of the engine cannot support the heating demand of the user, that is, the heating temperature provided by the battery pack heat exchanger cannot reach the required temperature of the battery pack, the battery pack heating cooler can be controlled to be turned on to assist in heating the battery pack to meet the heating demand of the battery pack.

[0072] That is, the waste heat of the engine can be preferentially used to heat the battery pack. If the waste heat of the engine can support the heating demand of the battery pack, the waste heat of the engine is directly used to heat the battery pack. If the waste heat of the engine cannot support the heating demand of the battery pack, the battery pack heating cooler that does not depend on the waste heat of the engine can be used to heat the battery pack.

[0073] In a possible implementation, the control method based on the engine waste heat utilization further includes:

[0074] If the water temperature of the engine is lower than the preset temperature, when the battery pack of the hybrid vehicle needs to be heated, the battery pack heating cooler is controlled to be turned on.

[0075] In this embodiment, if the water temperature of the engine is lower than the preset temperature, when the battery pack has a heating demand, the battery pack heating cooler can be directly controlled to heat the battery pack.

[0076] Based on the above embodiment, the heat supply device can include the core of the engine heater and the battery pack heat exchanger. On this basis, the core of the engine heater and the battery pack heat exchanger need to be connected to the circulating water circuit of the engine. The specific connection examples can be referred to in Figure 2 , Figure 2 A schematic diagram of an engine circulating water circuit is provided. Figure 2 In the engine circulating water circuit, the cooling water of the engine flows out from the cylinder head / cylinder block, passes through each branch, and finally reaches the node of the main radiator and the thermostat. At this time, whether the cooling water passes through the main radiator can be controlled by controlling the thermostat. After passing through the node of the main radiator and the thermostat, the cooling water passes through the water pump (this water pump refers to Figure 2The water pump closer to the thermostat re-enters the cylinder block to complete the entire cooling water circulation process.

[0077] Figure 2 In the embodiment, the heater core refers to the core of the engine heater, and the heater core is connected to the engine water circulation system. Figure 2 As can be seen, the heater core takes water from the engine cylinder head and is connected to the engine water circulation system. Based on this, the engine heater can be used to provide heat for users according to the heat supply requirement of the users. If the heat supply capacity of the engine heater cannot meet the requirement of the users, the electric heater can be controlled to be turned on to provide auxiliary heat supply.

[0078] Figure 2 In the embodiment, the battery pack heat exchanger takes water from the engine cylinder head and is connected to the engine water circulation system. Based on this, the battery pack heat exchanger can be used to heat the battery pack circulating water to provide heat for the battery pack. If the heat supply capacity of the battery pack heat exchanger cannot meet the requirement of the battery pack, the battery pack heater-cooler can be controlled to be turned on to provide auxiliary heat supply.

[0079] Based on this, in the specific control, if the engine is running normally, the electronic water pump runs MAP1 (i.e., the first MAP graph), and the duty cycle of the electronic water pump is controlled according to the target water temperature of the engine. After the engine is stopped, the electronic thermostat closes the large circulation, the electronic water pump runs MAP2 (the second MAP graph), and the engine water circulation system runs the small circulation to ensure that the heat exchange equipment takes water. At this time, the duty cycle of the electronic water pump is controlled according to the temperature requirement of the heat supply object corresponding to the heat exchange equipment.

[0080] According to the above description, when the heat supply equipment includes the core of the engine heater and the battery pack heat exchanger, the specific heating process can refer to Figure 3 , Figure 3 In the embodiment, T0 is the preset temperature, MAP1 is the first MAP graph, and MAP2 is the second MAP graph. In the embodiment, Figure 3 The example is given on the premise that the user and the battery pack have a heating requirement.

[0081] As shown in Figure 3 , in the engine normal running state, the electronic water pump runs the duty cycle MAP1 according to the target water temperature of the engine. At this time, the engine circulating water is used to heat the heater core and the battery pack heat exchanger. If the heating requirement of the cab and the battery pack can be met, the state is maintained. At this time, if the engine heating is insufficient, the electric heater is involved to increase the heating capacity. Correspondingly, if the heat supply of the battery pack heat exchanger is insufficient, the battery pack heater-cooler is involved to increase the heat supply capacity.

[0082] As shown in Figure 3As shown, in the engine stop state, if the engine water temperature is lower than T0, the electric heater is directly used for heating. Correspondingly, the battery pack is also directly heated by the battery pack heating cooler. If the engine water temperature is higher than T0, the electronic thermostat closes the large circulation, the electronic water pump operates at the MAP2 duty ratio, the engine circulation water circuit operates in the small circulation to ensure that the heater takes water (or the battery pack heat exchanger takes water), and the engine circulation water is used to heat the heater core and the battery pack heat exchanger. If the heating requirement of the cab and the battery pack can be met, this state is maintained. If the heater of the engine is insufficient, the electric heater is involved to increase the heating capacity. Correspondingly, if the battery pack heat exchanger is insufficient, the battery pack heating cooler is involved to increase the heating capacity.

[0083] In the above two cases, the electric heater can be used for temperature regulation based on PID.

[0084] In a possible implementation, the first MAP map takes the target water temperature of the engine as the control target, and the second MAP map takes the demand temperature of the heating object corresponding to the heat exchanger as the control target.

[0085] In the embodiment, the control of the first MAP map is mainly for heat dissipation of the engine, and the control of the second MAP map is mainly for transferring the waste heat to the heat exchanger as much as possible. On this basis, the first MAP map can take the target water temperature of the engine as the control target, and the second MAP map can take the demand temperature of the heating object corresponding to the heat exchanger as the control target.

[0086] In a possible implementation, an electronic ball valve is further arranged in the circulation water circuit, and the electronic ball valve is used to cut off the water circulation of the target branch in the circulation water circuit when the engine is in the stop state. The target branch refers to a branch other than the branch in which the heat exchanger is arranged in the circulation water circuit.

[0087] After the circulation water circuit is controlled to operate in the small circulation, the control method based on the engine waste heat utilization further includes:

[0088] The electronic ball valve is controlled to cut off the water circulation of the target branch in the circulation water circuit.

[0089] In the embodiment, the electronic ball valve can also be arranged in the circulation water circuit, and the electronic ball valve is mainly used to cut off / conduct the branches of the circulation water circuit. For example, the electronic ball valve can be arranged to cut off the branches other than the branch in which the heat exchanger is arranged in the circulation water circuit. At this time, after the circulation water circuit is controlled to operate in the small circulation, the electronic ball valve can be controlled to cut off the water circulation of the branches other than the branch in which the heat exchanger is arranged in the circulation water circuit. When the water circulation is performed in the circulation water circuit, the circulation water of the engine only passes through the heat exchanger, and at this time, the waste heat of the engine can be used to the greatest extent, and the energy utilization rate of the engine is improved.

[0090] The circulating water mentioned in the present application is the cooling water of the engine in the circulating water path.

[0091] The control method based on engine waste heat utilization corresponding to the above embodiment, Figure 4 The structural block diagram of the control device based on engine waste heat utilization provided by an embodiment of the present application is shown. For the convenience of description, only the parts related to the embodiments of the present application are shown. The control device based on engine waste heat utilization provided by the present embodiment is applied to a hybrid vehicle. The heat exchange device in the hybrid vehicle is connected to the circulating water path of the engine of the hybrid vehicle. On this basis, the control device based on engine waste heat utilization is described with reference to Figure 4 The control device based on engine waste heat utilization 20 comprises a data acquisition module 21 and a control module 22.

[0092] The data acquisition module 21 is configured to acquire the operating state of the engine, and acquire the water temperature of the engine when the engine is in the shutdown state.

[0093] The control module 22 is configured to, when the engine is in the operating state, control the electronic water pump in the circulating water path based on a preset first MAP graph to transmit the waste heat of the engine to the heat exchange device. When the engine is in the shutdown state and the water temperature of the engine is not lower than a preset temperature, control the circulating water path to operate in a small circulation mode, and control the electronic water pump in the circulating water path based on a preset second MAP graph to transmit the waste heat of the engine to the heat exchange device.

[0094] In a possible implementation, the heat exchange device comprises the core of the engine heater, and the hybrid vehicle comprises an electric heater. Both the engine heater and the electric heater are used to heat the cabin of the hybrid vehicle. After the waste heat of the engine is transmitted to the core of the engine heater, the control module 22 is further configured to:

[0095] After the user starts the heating of the cabin, it is detected whether the heating temperature provided by the engine heater reaches the temperature preset by the user.

[0096] If the heating temperature provided by the engine heater does not reach the temperature preset by the user, the electric heater is controlled to be turned on to assist in increasing the heating temperature.

[0097] In a possible implementation, the control module 22 is further configured to:

[0098] After the water temperature of the engine is lower than the preset temperature and the user starts the heating of the cabin, the electric heater is controlled to be turned on.

[0099] In one possible implementation, the heat exchange equipment includes a battery pack heat exchanger, and the hybrid vehicle includes a battery pack heater / cooler. Both the battery pack heat exchanger and the battery pack heater / cooler are used to heat the battery pack in the hybrid vehicle. After transferring the engine's waste heat to the core of the battery pack heat exchanger, the control module 22 is further configured to:

[0100] When the battery pack of a hybrid vehicle requires heating, it is checked whether the heating temperature provided by the battery pack heat exchanger meets the required temperature of the battery pack.

[0101] If the heating temperature provided by the battery pack heat exchanger does not reach the required temperature of the battery pack, the battery pack heater / cooler will be turned on to help increase the heating temperature.

[0102] In one possible implementation, the control module 22 is also used for:

[0103] When the engine coolant temperature is lower than the preset temperature and the hybrid vehicle's battery pack needs heating, the battery pack heater / cooler is turned on.

[0104] In one possible implementation, the first MAP map uses the engine's target water temperature as the control target, and the second MAP map uses the required temperature of the heat exchanger's corresponding heat supply object as the control target.

[0105] In one possible implementation, an electronic ball valve is also installed in the circulating water circuit. The electronic ball valve is used to cut off the water circulation of the target branch in the circulating water circuit when the engine is stopped. The target branch refers to other branches in the circulating water circuit besides the branch where the heat exchange equipment is located.

[0106] After controlling the circulating water circuit to operate in a small circulation mode, the control module 22 is also used for:

[0107] Control the electronic ball valve to cut off the water circulation in the target branch of the circulating water circuit.

[0108] This invention also provides a vehicle, which includes a control terminal, see below. Figure 5 , Figure 5 This is a schematic block diagram of a control terminal provided in an embodiment of the present invention. Figure 5 The terminal 300 in this embodiment may include one or more processors 301, one or more input devices 302, one or more output devices 303, and one or more memories 304. The processors 301, input devices 302, output devices 303, and memories 304 communicate with each other via a communication bus 305. The memories 304 store computer programs, including program instructions. The processors 301 execute the program instructions stored in the memories 304. Specifically, the processors 301 are configured to invoke the program instructions to perform the functions of the modules / units in the above-described device embodiments, such as...Figure 4 The functions of the illustrated modules 21-22.

[0109] It should be understood that, in the embodiments of the present application, the processor 301 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 gates or transistor logic components, discrete hardware components, etc. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor.

[0110] The input device 302 can include a touchpad, a fingerprint acquisition sensor (for acquiring fingerprint information and direction information of a user's fingerprint), a microphone, etc., and the output device 303 can include a display (LCD, etc.), a speaker, etc.

[0111] The memory 304 can include read-only memory and random access memory, and provide instructions and data for the processor 301. A portion of the memory 304 can also include non-volatile random access memory. For example, the memory 304 can also store device type information.

[0112] In specific implementations, the processor 301, the input device 302, and the output device 303 described in the embodiments of the present application can execute the implementation manners described in the first and second embodiments of the control method based on utilization of engine waste heat provided by the embodiments of the present application, and can also execute the implementation manners of the terminal described in the embodiments of the present application, which will not be described here again.

[0113] In another embodiment of the present application, a computer readable storage medium is provided, which stores a computer program. The computer program includes program instructions, which, when executed by a processor, implement all or part of the processes of the above-mentioned embodiments. The computer program can also instruct related hardware to complete the implementation. The computer program can be stored in a computer readable storage medium. When the computer program is executed by the processor, the steps of the above-mentioned various method embodiments can be implemented. The computer program includes computer program code, which can be in the form of source code, object code, executable code, or some intermediate form. The computer readable medium can include any entity or device capable of carrying the computer program code, recording medium, U disk, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signal, telecommunication signal, and software distribution medium, etc. It should be noted that the computer readable medium can include or exclude some contents according to the requirements of legislation and patent practice in the jurisdiction, for example, in some jurisdictions, according to legislation and patent practice, the computer readable medium does not include electrical carrier signals and telecommunication signals.

[0114] The computer readable storage medium can be an internal storage unit of the terminal, such as a hard disk or a memory of the terminal. The computer readable storage medium can also be an external storage device of the terminal, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. Further, the computer readable storage medium can include both the internal storage unit and the external storage device of the terminal. The computer readable storage medium is used to store the computer program and other programs and data required by the terminal. The computer readable storage medium can also be used to temporarily store data that has been output or will be output.

[0115] Those skilled in the art can realize that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be realized in electronic hardware, computer software or a combination of both. In order to clearly illustrate the interchangeability of hardware and software, the components and steps of the examples have been described in general terms in the above description. Whether the functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. A person 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.

[0116] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the terminal and the unit described above can refer to the corresponding process in the foregoing method embodiment, and will not be repeated here.

[0117] In several embodiments provided in the present application, it should be understood that the disclosed terminal and method can be implemented in other ways. For example, the apparatus embodiments described above are merely schematic, for example, the division of 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 shown or discussed can be indirect coupling or communication connection through some interfaces or units, and can also be electrical, mechanical or other form of connection.

[0118] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, that is, they can be located in one place, or can be distributed on a plurality of network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiment of the present application.

[0119] In addition, each functional unit in each embodiment of the present application can be integrated into a processing unit, or each unit can exist physically independently, or two or more units can be integrated into one unit. The integrated unit can be realized in the form of hardware or in the form of a software functional unit.

[0120] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto, and any skilled person in the art can easily think of various equivalent modifications or replacements within the technical range disclosed by the present application, and these modifications or replacements should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A control method based on engine waste heat utilization, characterized by, The engine waste heat utilization-based control method is applied to a hybrid vehicle, and a heat exchange device in the hybrid vehicle is connected to a circulating water circuit of an engine of the hybrid vehicle; The engine waste heat utilization-based control method comprises: obtaining an operating state of the engine; if the engine is in the operating state, controlling an electronic water pump in the circulating water circuit based on a preset first MAP (Mapping Area) to transmit waste heat of the engine to the heat exchange device; if the engine is in a shutdown state, obtaining a water temperature of the engine; if the water temperature of the engine is not lower than a preset temperature, controlling the circulating water circuit to operate in a small cycle and controlling the electronic water pump in the circulating water circuit based on a preset second MAP to transmit waste heat of the engine to the heat exchange device; the control targets of the first MAP and the second MAP are different, the control of the first MAP is mainly for heat dissipation of the engine, and the duty cycle of the electronic water pump is controlled, and the control of the second MAP is mainly for transmitting waste heat to the heat exchange device as much as possible, and the duty cycle of the electronic water pump is controlled.

2. The control method based on engine waste heat utilization according to claim 1, characterized by, The heat exchange device comprises a core of an engine heater, and the hybrid vehicle comprises an electric heater, and the engine heater and the electric heater are both used for heating a cabin of the hybrid vehicle; after the waste heat of the engine is transmitted to the core of the engine heater, the engine waste heat utilization-based control method further comprises: after a user starts heating of the cabin, detecting whether a heating temperature provided by the engine heater reaches a temperature preset by the user; if the heating temperature provided by the engine heater does not reach the temperature preset by the user, controlling the electric heater to be turned on to assist in increasing the heating temperature.

3. The control method based on engine waste heat utilization according to claim 2, characterized by, The engine waste heat utilization-based control method further comprises: if the water temperature of the engine is lower than the preset temperature, controlling the electric heater to be turned on after the user starts heating of the cabin.

4. The control method based on engine waste heat utilization according to claim 1, characterized by, The heat exchange device comprises a battery pack heat exchanger, and the hybrid vehicle comprises a battery pack heating and cooling device, and the battery pack heat exchanger and the battery pack heating and cooling device are both used for heating a battery pack in the hybrid vehicle; after the waste heat of the engine is transmitted to the core of the battery pack heat exchanger, the engine waste heat utilization-based control method further comprises: when the battery pack in the hybrid vehicle needs to be heated, detecting whether a heating temperature provided by the battery pack heat exchanger reaches a required temperature of the battery pack; if the heating temperature provided by the battery pack heat exchanger does not reach the required temperature of the battery pack, controlling the battery pack heating and cooling device to be turned on to assist in increasing the heating temperature.

5. The control method based on engine waste heat utilization according to claim 4, characterized by, The engine waste heat utilization-based control method further comprises: if the water temperature of the engine is lower than the preset temperature, controlling the battery pack heating and cooling device to be turned on when the battery pack in the hybrid vehicle needs to be heated.

6. The control method based on utilization of engine waste heat according to any one of claims 1 to 5, characterized by, The first MAP takes a target water temperature of the engine as a control target, and the second MAP takes a required temperature of a heating object corresponding to the heat exchange device as a control target.

7. The control method based on utilization of engine waste heat according to any one of claims 1 to 5, characterized by, The circulating water circuit is further provided with an electronic ball valve, which is used to cut off water circulation of a target branch of the circulating water circuit when the engine is in a shutdown state, the target branch referring to a branch of the circulating water circuit other than the branch in which the heat exchange device is located; After the circulating water circuit is controlled to operate in a small circulation mode, the engine waste heat utilization-based control method further includes: controlling the electronic ball valve to cut off water circulation of the target branch of the circulating water circuit.

8. A control device based on engine waste heat utilization, characterized by, The engine waste heat utilization-based control device is applied to a hybrid vehicle, and a heat exchange device in the hybrid vehicle is connected to a circulating water circuit of an engine of the hybrid vehicle; The engine waste heat utilization-based control device includes: a data acquisition module, configured to acquire an operating state of the engine and a water temperature of the engine when the engine is in a shutdown state; a control module, configured to, when the engine is in an operating state, control an electronic water pump in the circulating water circuit based on a preset first MAP (Mapping) to transmit waste heat of the engine to the heat exchange device; and when the engine is in a shutdown state and the water temperature of the engine is not lower than a preset temperature, control the circulating water circuit to operate in a small circulation mode and control the electronic water pump in the circulating water circuit based on a preset second MAP to transmit waste heat of the engine to the heat exchange device; the control targets of the first MAP and the second MAP are different, the control of the first MAP is mainly for heat dissipation of the engine, and the duty cycle of the electronic water pump is controlled, and the control of the second MAP is mainly for transmitting as much waste heat as possible to the heat exchange device, and the duty cycle of the electronic water pump is controlled.

9. A hybrid vehicle characterized by comprising: comprise: a control terminal; the control terminal comprises a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor implements the steps of the method according to any one of claims 1 to 7 when executing the computer program.

10. A computer-readable storage medium storing a computer program, the computer program comprising instructions that, when executed by a computer, cause the computer to perform the method of any one of claims 1 to 9. The computer program is executed by the processor to implement the steps of the method according to any one of claims 1 to 7.

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