Intelligent electronic water pump control system and method for plug-in hybrid electric vehicle

Abstract

The present invention belongs to the technical field of vehicles. Provided are an intelligent electronic water pump control system and method for a plug-in hybrid electric vehicle. The system comprises a hybrid control unit, an engine system controller and an electronic water pump; the hybrid control unit is used for determining a combination water pump rotation speed of the electronic water pump and sending the combination water pump rotation speed to the engine system controller, and also, on the basis of a fault level of the engine system controller, carrying out fault post-processing; the engine system controller is used for controlling, on the basis of the combination water pump rotation speed, the electronic water pump, and also determining, on the basis of a fault type, the fault level of the engine system controller, and sending the fault level of the engine system controller to the hybrid control unit; the electronic water pump determines own fault type and sends the fault type to the engine system controller, and is also responsible for self-operation after a fault. The present invention defines corresponding fault levels for fault types of the electronic water pump, such that corresponding post-processing can be performed, thus achieving more reasonable and more accurate control.

Description

An intelligent electronic water pump control system and method for plug-in hybrid vehicles Technical Field

[0001] The present invention belongs to the field of automobile technology, and particularly relates to an intelligent electronic water pump control system and method for a plug-in hybrid vehicle. Background Art

[0002] The engine high-temperature cooling system is related to the speed of the electronic fan and the engine electronic water pump. The speed of the electronic fan in a hybrid vehicle is related to the electric circuit. Therefore, it is necessary to establish a correlation between the electronic water pump speed (engine) and the electronic fan (related to the engine high-temperature circuit cooling and the electric low-temperature circuit cooling) to make it more intelligent and energy-saving.

[0003] Electronic water pump failures must be diagnosed while the engine is running. If the water pump stops, the fault disappears. This can cause the engine and the electronic water pump to repeatedly start and stop. Therefore, post-fault self-operation must be implemented based on the type of failure to prevent repeated engine and water pump starts and stops.

[0004] Based on past experience, if any fault occurs in a critical cooling circuit component (such as the fan) (e.g., a fan failure or a damaged relay), the entire vehicle is torque-limited. However, the electronic water pump itself can determine the fault type, but the resulting faults can fall into various categories, each with varying impacts on the vehicle. Therefore, it is necessary to establish a vehicle controller, engine system controller, and electronic water pump control system, along with appropriate post-processing methods based on the fault type.

[0005] Summary of the Invention

[0006] The purpose of the present invention is to solve the above-mentioned difficulties existing in the prior art and provide an intelligent electronic water pump control system and method for plug-in hybrid vehicles, so as to avoid repeated starting and stopping of the engine and vehicle over-processing (i.e. speed / torque limiting) after a failure of the electronic water pump, thereby making the application of the electronic water pump more reasonable.

[0007] The present invention is achieved through the following technical solutions:

[0008] A first aspect of the present invention provides an intelligent electronic water pump control system for a plug-in hybrid vehicle, the system comprising: a vehicle controller, an engine system controller, and an electronic water pump;

[0009] The vehicle controller is used to determine the combined water pump speed of the electronic water pump and send the combined water pump speed to the engine system controller, and perform fault post-processing according to the fault level of the engine system controller;

[0010] The engine system controller is used to control the electronic water pump according to the combined water pump speed, and determine the engine system controller fault level according to the fault type, and send the engine system controller fault level to the vehicle controller;

[0011] The electronic water pump determines the type of its own fault and sends the fault type to the engine system controller, and is responsible for self-operation after the fault occurs.

[0012] A second aspect of the present invention provides an intelligent electronic water pump control method for a plug-in hybrid vehicle, the method comprising:

[0013] (1) The vehicle controller determines the combined water pump speed of the electronic water pump and sends the combined water pump speed to the engine system controller;

[0014] (2) After receiving the combined water pump speed, the engine system controller controls the speed of the electronic water pump to be the combined water pump speed;

[0015] (3) The electronic water pump determines whether there is a fault in real time. If not, it responds to the demand normally. If so, it performs fault diagnosis to obtain the fault category and enters the post-fault self-operation mode;

[0016] (4) The engine system controller determines whether a fault code is received. If so, it determines the fault level of the fault category, sets the engine system controller fault level to the same level as the fault level, and sends the engine system controller fault level to the vehicle controller; if not, it saves the original fault level as a historical fault, sets the engine system controller fault level to zero, and sends the engine system controller fault level to the vehicle controller;

[0017] (5) The vehicle controller performs post-fault processing based on the fault level of the engine system controller.

[0018] Preferably, the operation of the vehicle controller in (1) determining the combined water pump speed of the electronic water pump includes:

[0019] (101), the vehicle controller determines the water pump speed A of the electronic water pump according to the engine water temperature and the engine operating condition; determines the fan speed B according to the air conditioner, the motor cooling water temperature, and the engine water temperature; determines whether the engine water temperature is greater than the first set value, if so, sets the fan speed B to 100, and then proceeds to (102), if not, proceeds to (102);

[0020] (102) It is determined whether the vehicle is powered off and whether the engine water temperature is greater than the second set value. If both are yes, the fan and the electronic water pump are operated for 40 seconds. If one of the two is no, the associated water pump speed of the electronic water pump is found in the electronic water pump speed and cooling fan speed association table according to the water pump speed A and the fan speed B.

[0021] Preferably, the operation of determining the water pump speed A of the electronic water pump according to the engine water temperature and the engine operating condition in (101) includes:

[0022] The maximum value of the water pump request speed corresponding to the engine water temperature and the water pump request speed corresponding to the engine operating condition is taken as the engine water pump speed A.

[0023] Preferably, the operation of determining the fan speed B according to the air conditioner, the motor cooling water temperature, and the engine water temperature in (101) includes:

[0024] The maximum value among the fan request value corresponding to the air conditioning fan, the fan request value corresponding to the motor cooling water temperature, and the fan request value corresponding to the engine water temperature is used as the fan speed B.

[0025] Preferably, the operation of performing fault diagnosis to obtain the fault category in (3) includes:

[0026] If the fault is overcurrent, the fault category is determined to be fault category 1;

[0027] If the fault is a stall, the fault category is determined to be fault category 2;

[0028] If the fault is overvoltage, the fault category is determined to be fault category 3;

[0029] If the fault is overtemperature, the fault category is determined to be fault category 4;

[0030] If the fault is an internal fault, the fault category is determined to be fault category 5;

[0031] If the fault is dry running, the fault category is determined to be fault category 6;

[0032] If the fault is LIN loss, the fault category is determined to be fault category 7.

[0033] Preferably, the operation of the electronic water pump entering the post-fault self-operation mode in (3) includes:

[0034] (301), determining whether there is an external request, if yes, operating according to the external request, if not, the electronic water pump self-triggering restart function, while the electronic water pump continues to send a fault code to the engine system controller, the fault code contains the fault category;

[0035] (302), determine whether the fault is eliminated, if not, return to (301), if yes, the electronic water pump stops sending fault codes.

[0036] Preferably, the operation of determining the fault level of the fault category in (4) includes:

[0037] If the fault category is any one of fault category 1 to fault category 6, the fault level is determined to be a level 5 fault; if the fault category is fault category 7, the fault level is determined to be a level 1 fault.

[0038] Preferably, the operation of setting the engine system controller fault level to the same level as the fault level in (4) includes:

[0039] If the fault level is level five, the engine system controller fault level is set to level five; if the fault level is level one, the engine system controller fault level is set to level one.

[0040] Preferably, the operation of (5) includes:

[0041] If the engine system controller fault level is zero or one, the vehicle controller controls normally;

[0042] If the engine system controller fault level is level five, the engine is shut down, the vehicle enters EV mode, and then enters (51);

[0043] (51) The vehicle controller determines whether the following conditions are met: SOC ≥ SOC setting value and discharge power ≥ power setting value. If so, the EV mode runs normally and returns to (51); if not, the vehicle enters post-processing.

[0044] Compared with the prior art, the present invention has the following beneficial effects:

[0045] The present invention establishes a connection between the engine electronic water pump and the electric circuit cooling (fan), which is more intelligent and energy-efficient. The present invention formulates corresponding fault levels according to the fault types of the electronic water pump, thereby performing corresponding post-processing, making the control more reasonable and accurate, and avoiding over-processing or untimely processing. The present invention avoids exiting the fault judgment when the electronic water pump stops, and avoids repeated and frequent starting and stopping of the engine and the electronic water pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 Engine electronic water pump control system;

[0047] Figure 2 is a flow chart showing the correlation between the engine electronic water pump speed and the fan speed;

[0048] Figure 3 Flowchart of post-processing of engine electronic water pump failure. DETAILED DESCRIPTION

[0049] The present invention is further described in detail below with reference to the accompanying drawings:

[0050] The present invention provides an intelligent electronic water pump control system for plug-in hybrid vehicles. As shown in Figure 1, the system includes: a vehicle controller (HCU), an engine system controller (ECM), and an electronic water pump (i.e., an engine water pump); the vehicle controller communicates with the engine system controller, which in turn communicates with the electronic water pump. Specifically, the vehicle controller communicates with the engine system controller via the CAN bus, and the engine system controller communicates with the electronic water pump via the LIN bus. These components and communication lines are already available in existing plug-in hybrid vehicles. The present invention achieves intelligent control of the electronic water pump by linking the vehicle controller, the engine system controller, and the electronic water pump.

[0051] The vehicle controller is used to determine the combined water pump speed of the electronic water pump and transmit this combined water pump speed to the engine system controller via the CAN bus. It is also used to perform fault post-processing based on the engine system controller fault level transmitted by the engine system controller. Controlling fan speed by the vehicle controller is an existing function and is therefore not shown in Figure 1.

[0052] The vehicle controller determines the combined water pump speed of the electronic water pump through the following operations:

[0053] First, the vehicle controller determines the water pump speed A of the electronic water pump according to the engine water temperature and the engine operating conditions (including speed and torque);

[0054] Secondly, the vehicle controller determines the fan speed B according to the air conditioning, motor cooling water temperature, and engine water temperature;

[0055] Finally, the vehicle controller searches the associated water pump speed of the electronic water pump in the electronic water pump speed and cooling fan speed association table according to the water pump speed A and the fan speed B.

[0056] Table 1 shows the correlation between electronic water pump speed and cooling fan speed. The water pump speed A in Table 1 is the test value at a selected point based on comprehensive cooling performance during thermal management testing of the engine unit bench before shipment. Water pump speed A can be determined by querying the control speed during the test based on real-time engine speed / torque data. The associated water pump speeds (e.g., 0.7A, 0.8A) are calibrated before shipment through bench and road testing. The basic principle of calibration is that high fan and water pump speeds both further dissipate heat. If one speed is high, the speed of the other can be reduced accordingly. (In Table 1, a, b, c, d, and e represent fan speeds; 35 and 40 represent 35% and 40% of full fan speed, respectively; 100 represents 100% fan speed, i.e., full fan speed).

[0057] For example, if the water pump speed A determined by the vehicle controller is 10 and the fan speed B is 80, then the associated water pump speed is 0.7A as found in Table 1, that is, the water pump speed can be 7, and the fan speed can be maintained at fan speed B or fully opened.

[0058] Table 1

[0059] The engine system controller is used to control the operation of the electronic water pump through LIN according to the combined water pump speed sent by the vehicle controller, and at the same time determine the engine system controller fault level according to the fault type sent by the electronic water pump, and send the engine system controller fault level to the vehicle controller.

[0060] As shown in Table 2, the engine system controller fault levels determined by the engine system controller include level 1 and level 5 (corresponding to level 1 and level 5 in Table 2). Level 1 faults have little impact on the vehicle, allowing the vehicle to control the engine. Therefore, the vehicle controller does not take any action, meaning the vehicle remains operational and continues to operate normally. Level 5 faults require the engine to shut down because it cannot operate. Therefore, the vehicle controller shuts down the engine and performs post-fault processing based on the high-voltage battery charge and SOC.

[0061] Table 2

[0062] The electronic water pump determines the type of its own fault and sends the fault type to the engine system controller, and is responsible for self-operation after the fault occurs.

[0063] The present invention also provides an intelligent electronic water pump control method for a plug-in hybrid vehicle, the method comprising:

[0064] (1) The vehicle controller determines the combined water pump speed of the electronic water pump and sends the combined water pump speed to the engine system controller;

[0065] As shown in FIG2 , the operation of the vehicle controller to determine the combined water pump speed of the electronic water pump includes:

[0066] (101), the vehicle controller determines the water pump speed A of the electronic water pump according to the engine water temperature and the engine operating conditions (speed, torque); determines the fan speed B according to the air conditioning, motor cooling water temperature, and engine water temperature; determines whether the engine water temperature is greater than a first set value (for example, 100 degrees), if so, sets the fan speed B to 100, that is, the fan speed is fully open, and then proceeds to (102); if not, the fan speed B remains unchanged and proceeds to (102);

[0067] The operation of determining the water pump speed A of the electronic water pump according to the engine water temperature and the engine operating conditions (speed, torque) includes:

[0068] The maximum of the water pump speed request corresponding to the engine water temperature and the water pump speed request corresponding to the engine operating condition is used as the engine water pump speed A. For example, if the engine water temperature is greater than 110°C, the water pump speed request corresponding to the engine water temperature is greater than 80%, or 80% of the maximum speed. The operating condition corresponding to the engine speed / torque also requires water pump speed. For example, if the speed is 3000 rpm / min and the required torque is 120 Nm (high power demand), the water pump speed request corresponding to the engine operating condition is greater than 85%, or 85% of the maximum water pump speed. The maximum of the two values ​​is used as the water pump speed A, i.e., the water pump speed A is greater than 85%.

[0069] The operation of determining the fan speed B based on the air conditioner, motor cooling water temperature, and engine water temperature includes:

[0070] The air conditioner, motor cooling water temperature, and engine water temperature each correspond to a fan request value, which refers to the fan speed. The maximum of the fan request values ​​corresponding to the air conditioner fan, the motor cooling water temperature, and the engine water temperature is used as the fan speed B.

[0071] (102) It is determined whether the vehicle is powered off and whether the engine water temperature is greater than a second set value (e.g., 110 degrees). If both are yes, the fan and water pump are operated for 40 seconds (this is the vehicle's post-operation strategy, i.e., after the vehicle is powered off, if the temperature is still too high, it needs to be cooled for another 40 seconds); if one of the two is no, the associated water pump speed of the electronic water pump is found in the association table of the electronic water pump speed and the cooling fan speed according to the water pump speed A and the fan speed B.

[0072] (2) After receiving the combined water pump speed, the engine system controller controls the speed of the electronic water pump to the combined water pump speed through the LIN bus;

[0073] (3) The electronic water pump determines whether there is a fault in real time. If not, it responds to the demand normally. If so, it performs fault diagnosis to obtain the fault category and enters the post-fault self-operation mode.

[0074] As shown in FIG3 , the operations for performing fault diagnosis and obtaining the fault category include:

[0075] If the fault is overcurrent, the fault category is determined to be fault category 1;

[0076] If the fault is a stall, the fault category is determined to be fault category 2;

[0077] If the fault is overvoltage, the fault category is determined to be fault category 3;

[0078] If the fault is overtemperature, the fault category is determined to be fault category 4;

[0079] If the fault is an internal fault, the fault category is determined to be fault category 5;

[0080] If the fault is dry running, the fault category is determined to be fault category 6;

[0081] If the fault is LIN loss, the fault category is determined to be fault category 7;

[0082] Existing electronic water pumps can determine the fault type by themselves, and the method for determining the fault type will not be described in detail here.

[0083] The operations of the electronic water pump entering the self-running mode after a fault include:

[0084] (301) Determine whether there is an external request. If yes, it will operate as required (i.e., operate according to the external request). If not, the electronic water pump will trigger the restart function (periodic restart. The absorption function of the electronic water pump is not described here). At the same time, the electronic water pump will continue to send fault codes to the engine system controller. The fault code contains the fault category.

[0085] (302), determine whether the fault is eliminated, if not, return to (301), if yes, the electronic water pump stops sending fault codes.

[0086] (4) The engine system controller determines whether a fault code is received. If so, it determines the fault level of the fault category and sets the engine system controller fault level to the same level as the fault level, and sends the engine system controller fault level to the vehicle controller via the CAN bus; if not, it saves the original fault level as a historical fault, sets the engine system controller fault level to zero (i.e., the initial value, indicating no fault), and sends the engine system controller fault level to the vehicle controller.

[0087] Specifically, the operation of determining the fault level of the fault category includes:

[0088] If the fault category is any one of fault category 1 to fault category 6, the fault level is determined to be a level 5 fault; if the fault category is fault category 7, the fault level is determined to be a level 1 fault.

[0089] The operations for setting the engine system controller fault level to the same level as the fault level include:

[0090] If the fault level is level five, the engine system controller fault level is set to level five; if the fault level is level one, the engine system controller fault level is set to level one.

[0091] Furthermore, in step (4), in order to avoid false alarms after powering on again (because there is a possibility of repair or replacement of parts after powering off), when the entire vehicle is powered off, the engine system controller saves the original fault level (fault level 1 or fault level 5) as a historical fault.

[0092] (5) After receiving the fault level of the engine system controller, the vehicle controller performs fault post-processing according to the fault level of the engine system controller;

[0093] Specifically, the post-fault processing operations according to the engine system controller fault level include:

[0094] If the engine system controller fault level is zero, the vehicle controller will control normally, that is, exit the vehicle fault post-processing, and the vehicle will return to normal.

[0095] If the engine system controller fault level is level one, the vehicle controller will not take any action, that is, normal control is sufficient. Because a level one fault will not affect the use of the entire vehicle, the system vehicle control is maintained and the electronic water pump can operate at the original speed.

[0096] If the engine system controller fault level is level five, the engine is shut down, the vehicle enters EV mode, and then enters (51);

[0097] (15) The vehicle controller determines whether the following conditions are met: SOC ≥ SOC setting value (e.g. 40%) and discharge power ≥ power setting value (e.g. 50kw). If so, the EV mode runs normally, the vehicle system is kept under normal control, and the controller returns to (51). If not (i.e., none of the above conditions are met), the vehicle enters post-processing, such as limiting the vehicle speed to 30km and lighting the slow speed fault light.

[0098] The present invention establishes a control strategy for the linkage between the cooling fan speed (electric circuit) and the electronic water pump speed; the present invention establishes the electronic water pump system fault post-processing logic, and performs corresponding fault post-processing for different fault levels; the present invention develops a self-operating mode based on the fault judgment conditions, and the electronic water pump operates normally and performs fault diagnosis as required to avoid repeated start and stop (repeated start and stop of the engine / repeated start and stop of the electronic water pump), thereby avoiding repeated start and stop.

[0099] In the description of the present invention, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0100] In the description of the present invention, unless otherwise specified, the terms "upper", "lower", "left", "right", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0101] The above technical solution is only one embodiment of the present invention. For those skilled in the art, it is easy to make various types of improvements or modifications based on the principles disclosed in the present invention, and it is not limited to the technical solution described in the above specific embodiments of the present invention. Therefore, the above description is only preferred and does not have a restrictive meaning.

Claims

1. An intelligent electronic water pump control system for a plug-in hybrid vehicle, characterized in that: The system includes: a vehicle controller, an engine system controller, and an electronic water pump; The vehicle controller is used to determine the combined water pump speed of the electronic water pump, and send the combined water pump speed to the engine system controller, and perform post-fault processing according to the fault level of the engine system controller; The engine system controller is used to control the electronic water pump according to the combined water pump speed, and at the same time determine the engine system controller fault level according to the fault type, and send the engine system controller fault level to the vehicle controller; The electronic water pump determines the type of its own fault and sends the fault type to the engine system controller, and is also responsible for self-operation after the fault.

2. An intelligent electronic water pump control method for a plug-in hybrid vehicle, characterized in that: The method comprises: (1) The vehicle controller determines the combined water pump speed of the electronic water pump and sends the combined water pump speed to the engine system controller; (2) After receiving the combined water pump speed, the engine system controller controls the speed of the electronic water pump to be the combined water pump speed; (3) The electronic water pump determines in real time whether there is a fault. If not, it responds normally to the demand. If so, it performs fault diagnosis to obtain the fault category and enters the post-fault self-operation mode; (4) The engine system controller determines whether a fault code is received. If so, the fault level of the fault category is determined, and the engine system controller fault level is set to the same level as the fault level, and the engine system controller fault level is sent to the vehicle controller; if not, the original fault level is saved as a historical fault, and the engine system controller fault level is set to zero, and the engine system controller fault level is sent to the vehicle controller; (5) The vehicle controller performs post-fault processing based on the fault level of the engine system controller.

3. The intelligent electronic water pump control method for plug-in hybrid vehicle according to claim 1, characterized in that: The operation of the vehicle controller in (1) to determine the combined water pump speed of the electronic water pump includes: (101), the vehicle controller determines the water pump speed A of the electronic water pump according to the engine water temperature and the engine operating condition; determines the fan speed B according to the air conditioning, the motor cooling water temperature and the engine water temperature; determines whether the engine water temperature is greater than the first set value, if yes, sets the fan speed B to 100, and then proceeds to (102), if no, proceeds to (102); (102), determine whether the vehicle is powered off and whether the engine water temperature is greater than a second set value. If both are yes, the fan and the electronic water pump will run for 40 seconds; if one of the two is no, find the associated water pump speed of the electronic water pump in the electronic water pump speed and cooling fan speed association table according to the water pump speed A and the fan speed B.

4. The intelligent electronic water pump control method for a plug-in hybrid vehicle according to claim 3 is characterized in that: The operation of determining the water pump speed A of the electronic water pump according to the engine water temperature and the engine operating condition in (101) includes: The maximum value of the water pump request speed corresponding to the engine water temperature and the water pump request speed corresponding to the engine operating condition is taken as the engine water pump speed A.

5. The intelligent electronic water pump control method for a plug-in hybrid vehicle according to claim 3 is characterized in that: The operation of determining the fan speed B according to the air conditioner, the motor cooling water temperature, and the engine water temperature in (101) includes: The maximum value among the fan request value corresponding to the air-conditioning fan, the fan request value corresponding to the motor cooling water temperature, and the fan request value corresponding to the engine water temperature is taken as the fan speed B.

6. The intelligent electronic water pump control method for a plug-in hybrid vehicle according to claim 2, characterized in that: (3) The operations for fault diagnosis and obtaining fault categories include: If the fault is overcurrent, the fault category is determined to be fault category 1; If the fault is a stall, the fault category is determined to be fault category 2; If the fault is overvoltage, the fault category is determined to be fault category 3; If the fault is overtemperature, the fault category is determined to be fault category 4; If the fault is an internal fault, the fault category is determined to be fault category 5; If the fault is dry running, the fault category is determined to be fault category 6; If the fault is LIN loss, the fault category is determined to be fault category 7.

7. The intelligent electronic water pump control method for a plug-in hybrid vehicle according to claim 2, characterized in that: The operation of the electronic water pump entering the self-operation mode after a fault in (3) includes: (301), determining whether there is an external request, if yes, operating according to the external request, if not, the electronic water pump self-triggering restart function, while the electronic water pump continues to send a fault code to the engine system controller, the fault code contains the fault category; (302), determine whether the fault is eliminated, if not, return to (301), if yes, the electronic water pump stops sending fault codes.

8. The intelligent electronic water pump control method for a plug-in hybrid vehicle according to claim 2 is characterized in that: The operation of determining the fault level of the fault category in (4) includes: If the fault category is any one of fault category 1 to fault category 6, the fault level is determined to be a level 5 fault; if the fault category is fault category 7, the fault level is determined to be a level 1 fault.

9. The intelligent electronic water pump control method for a plug-in hybrid vehicle according to claim 2, characterized in that: The operation of setting the engine system controller fault level to the same level as the fault level in (4) includes: If the fault level is level five, the engine system controller fault level is set to level five; if the fault level is level one, the engine system controller fault level is set to level one.

10. The intelligent electronic water pump control method for a plug-in hybrid vehicle according to claim 2, characterized in that: The operation of (5) includes: If the engine system controller fault level is zero or one, the vehicle controller controls normally; If the engine system controller fault level is level five, the engine is shut down, the vehicle enters EV mode, and then enters (51); (51) The vehicle controller determines whether the following conditions are met: SOC ≥ SOC setting value and discharge power ≥ power setting value. If so, the EV mode runs normally and returns to (51); if not, the vehicle enters post-processing.

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