Intelligent switching method and system for driving modes of hybrid vehicle, storage medium and vehicle

Abstract

The invention discloses an intelligent switching method and system for hybrid vehicle driving modes, a storage medium and a vehicle. Before the vehicle is started, according to user requirements, the whole vehicle required power, the maximum power of a pure electric driving mode, the maximum power of a series driving mode and the maximum power of a parallel driving mode are calculated, the maximum power of the pure electric drive mode is smaller than the maximum power of the series drive mode and smaller than the maximum power of the parallel drive mode, whether the whole vehicle demand power is not larger than the maximum power of the pure electric drive mode or not is judged, whether the whole vehicle demand power is not larger than the maximum power of the series drive mode or not is judged, and an appropriate vehicle drive mode is selected. According to the intelligent switching method for the vehicle driving modes, the driving modes are selected by calculating the demand power and the driving power of the vehicle according to the user demand, so that the timeliness of switching the vehicle driving modes and the accuracy of the switching result are ensured.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of hybrid vehicle driving mode switching, and particularly relates to a hybrid vehicle driving mode intelligent switching method and system, a storage medium and a vehicle. BACKGROUND

[0002] In the prior art, hybrid vehicles are a key technical route for the transition from traditional fuel vehicles to pure electric vehicles. By coupling the engine and the electric motor, the respective advantages are utilized to significantly improve the fuel economy and emission level of the vehicle. Intelligent switching of the driving mode is the core of hybrid vehicle technology, which directly determines the energy efficiency, power performance and driving smoothness of the vehicle. However, the switching of the driving mode of the vehicle mostly depends on the analysis of historical data, the timeliness of the data is poor, and the driving mode cannot be changed according to the actual user's will, and the mobility is poor.

[0003] Therefore, a new hybrid vehicle driving mode switching method is needed to solve the above technical problems. SUMMARY

[0004] The application aims to provide a hybrid vehicle driving mode intelligent switching method for the technical problems of driving mode switching not being timely and the switching result being inaccurate in the prior art.

[0005] The application also aims to provide a switching system adopting the hybrid vehicle driving mode intelligent switching method.

[0006] The application also aims to provide a computer-readable storage medium.

[0007] The application also aims to provide a vehicle.

[0008] The technical solution of the application to solve the technical problems is as follows: A hybrid vehicle driving mode intelligent switching method, specifically comprising the following steps: S1: Before the vehicle starts, the vehicle demand power, the maximum power of the pure electric driving mode, the maximum power of the series driving mode, and the maximum power of the parallel driving mode are calculated according to the user's demand, wherein the maximum power of the pure electric driving mode is less than the maximum power of the series driving mode, which is less than the maximum power of the parallel driving mode. It is judged whether the vehicle demand power is not greater than the maximum power of the pure electric driving mode. If yes, the vehicle adopts the pure electric driving mode; if no, step S2 is executed; S2: It is judged whether the vehicle demand power is not greater than the maximum power of the series driving mode. If yes, the vehicle adopts the series driving mode; if no, the vehicle adopts the parallel driving mode.

[0009] Preferably, the calculation formula of the vehicle demand power is: Preq = P HV + P D ; The calculation formula of the maximum power in the pure electric drive mode is: P E = P BMS -P HV ; The calculation formula of the maximum power in the series drive mode is: P S = mix(P ICE , P GMot ) + P BMS -P HV ; The calculation formula of the maximum power in the parallel drive mode is: P p = P ICE + P BMS -P HV ; Wherein, P req is the demand power of the whole vehicle, P HV is the demand power of the high-voltage accessories of the whole vehicle, mainly including the real-time power of the high-voltage DCDC and the real-time power of the AC or PTC, P D is the demand power of the drive of the whole vehicle; P E is the maximum power in the pure electric drive mode, P BMS is the maximum discharge power of the power battery; P s is the maximum power in the series drive mode, P ICE is the maximum power of the engine, P GMot is the maximum power generation of the generator, and P p is the maximum power in the parallel drive mode.

[0010] Preferably, the application further provides a drive mode switching method in the driving process of the vehicle, which comprises the following steps: D1: judging whether the current drive mode of the vehicle is the pure electric drive mode, if yes, executing step D2.1; if no, executing step D2.2; D2.1: judging whether the remaining power of the battery is not less than the first set power, if yes, keeping the pure electric drive mode; if no, executing step D2.2; D2.2: judging whether there is an engine starting request, if yes, executing step D3.1; if no, executing step D3.2; D3.1: judging whether the current drive mode of the vehicle is the series drive mode, if yes, executing step D4.1, if no, executing step D4.2; D3.2: judging whether the remaining power of the battery is not less than the second set power, if yes, keeping the pure electric drive mode; if no, executing step D3.1; D4.1: judging whether there is a special demand for the engine, if yes, maintaining the series drive mode, if no, executing step D4.2; D4.2: judging whether the current drive mode of the vehicle is the parallel drive mode, if yes, executing step D5.1, if no, executing step D2.2; D5.1: judging whether the clutch of the vehicle is available, if yes, executing step D5.2; if no, starting the series drive mode; D5.2: judging whether the current vehicle speed is not greater than the set speed, if yes, starting the series drive mode; if no, maintaining the parallel drive mode.

[0011] Preferably, the first set electric quantity is 5% of the total capacity of the battery, the second set electric quantity is 25% of the total capacity of the battery, and the set speed is 80 km / h.

[0012] A switching system of an intelligent switching method of a hybrid vehicle drive mode, comprising: a battery data module for collecting current, voltage, temperature data of the battery of the vehicle, calculating the maximum discharge power of the battery and the remaining electric quantity of the battery and sending them to the processor; a motor data module for collecting motor power parameters, high-voltage accessory power parameters, motor speed, calculating motor power and high-voltage accessory power and sending them to the processor; an engine data module for collecting engine power parameters and engine speed, sending the calculated engine power and the obtained engine speed, engine special demand and engine start request data to the processor; a user demand module for collecting the clutch state, throttle state and drive mode state of the vehicle and sending them to the processor; a processor for judging the drive state of the current vehicle according to the received maximum discharge power of the battery, the remaining electric quantity of the battery, the motor power, the high-voltage accessory power, the engine power and the obtained engine speed, engine special demand, engine start request data, the clutch state, throttle state and drive mode state of the vehicle, and making a selection of the drive mode of the vehicle.

[0013] A computer readable storage medium storing a computer program, wherein the computer program is executed by a processor to make the device in which the computer readable storage medium is located execute the intelligent switching method of the drive mode of the hybrid vehicle.

[0014] A vehicle characterized by: a switching system of an intelligent switching method of a hybrid vehicle drive mode.

[0015] The beneficial effect of the present application is that: by calculating the whole vehicle demand power, the maximum power of the pure electric drive mode, the maximum power of the series drive mode and the maximum power of the parallel drive mode according to the user demand before the vehicle starts, wherein the maximum power of the pure electric drive mode is less than the maximum power of the series drive mode which is less than the maximum power of the parallel drive mode, judging whether the whole vehicle demand power is not greater than the maximum power of the pure electric drive mode and whether the whole vehicle demand power is not greater than the maximum power of the series drive mode, the appropriate vehicle drive mode is selected. The intelligent switching method of the vehicle drive mode selects the drive mode by calculating the demand power and the drive power of the vehicle according to the user demand, which ensures the timeliness of the vehicle drive mode switching and the accuracy of the switching result. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a flowchart of the intelligent switching method of the hybrid vehicle drive mode of the present application before the vehicle starts; Figure 2 is a flowchart of the intelligent switching method of the hybrid vehicle drive mode of the present application during the vehicle driving. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.

[0018] As shown in Figure 1 , the present application discloses an intelligent switching method of a hybrid vehicle drive mode, which specifically comprises the following steps: S1: before the vehicle starts, calculating the whole vehicle demand power, the maximum power of the pure electric drive mode, the maximum power of the series drive mode and the maximum power of the parallel drive mode according to the user demand, wherein the maximum power of the pure electric drive mode is less than the maximum power of the series drive mode which is less than the maximum power of the parallel drive mode, judging whether the whole vehicle demand power is not greater than the maximum power of the pure electric drive mode, if yes, the vehicle adopts the pure electric drive mode, if no, executing step S2; S2: judging whether the whole vehicle demand power is not greater than the maximum power of the series drive mode, if yes, the vehicle adopts the series drive mode, if no, the vehicle adopts the parallel drive mode.

[0019] Preferably, the calculation formula of the whole vehicle demand power is: P req =P HV +P D ; The calculation formula of the maximum power of the pure electric drive mode is: P E = P BMS -P HV ; The calculation formula of the maximum power of the series drive mode is: P S =mix(P ICE ,P GMot )+ P BMS -P HV ; The calculation formula of the maximum power in the parallel driving mode is: P p =P ICE + P BMS -P HV ; Wherein, P req is the demand power of the whole vehicle, P HV is the demand power of high-voltage accessories of the whole vehicle, mainly including the real-time power of high-voltage DCDC, the real-time power of AC or PTC, P D is the demand power of driving of the whole vehicle; P E is the maximum power in the pure electric driving mode, P BMS is the maximum discharge power of the power battery; P s is the maximum power in the series driving mode, P ICE is the maximum power of the engine, P GMot is the maximum power generation of the generator, and P p is the maximum power in the parallel driving mode.

[0020] As shown in FIG. 1, the application further includes a driving mode switching method in the vehicle driving process, which specifically includes the following steps: Figure 2 D1: judging whether the current driving mode of the vehicle is the pure electric driving mode, if yes, executing step D2.1; if no, executing step D2.2; D2.1: judging whether the remaining power of the battery is not less than the first set power, if yes, maintaining the pure electric driving mode; if no, executing step D2.2; D2.2: judging whether there is an engine starting request, if yes, executing step D3.1; if no, executing step D3.2; D3.1: judging whether the current driving mode of the vehicle is the series driving mode, if yes, executing step D4.1, if no, executing step D4.2; D3.2: judging whether the remaining power of the battery is not less than the second set power, if yes, maintaining the pure electric driving mode; if no, executing step D3.1; D4.1: judging whether there is a special demand of the engine, if yes, maintaining the series driving mode, if no, executing step D4.2; D4.2: judging whether the current driving mode of the vehicle is the parallel driving mode, if yes, executing step D5.1, if no, executing step D2.2; D5.1: judging whether there is an engine starting request, if yes, executing step D6.1; if no, executing step D6.2; D5.1: Determine whether the clutch of the vehicle is available, if yes, execute step D5.2; if no, start the series drive mode; D5.2: Determine whether the current vehicle speed is not greater than the set speed, if yes, start the series drive mode; if no, keep the parallel drive mode.

[0021] The first set electric quantity is 5% of the total capacity of the battery, the second set electric quantity is 25% of the total capacity of the battery, and the set speed is 80 km / h.

[0022] A switching system of an intelligent switching method of a hybrid vehicle driving mode, comprising: A battery data module for collecting current, voltage and temperature data of the battery of the vehicle, calculating the maximum discharge power of the battery and the remaining battery capacity and sending them to the processor; An electric motor data module for collecting electric motor power parameters, high-voltage accessory power parameters and electric motor speed, calculating the electric motor power and the high-voltage accessory power and sending them to the processor; An engine data module for collecting engine power parameters and engine speed, sending the calculated engine power and the obtained engine speed, engine special requirements and engine start request data to the processor; A user demand module for collecting the clutch state, throttle state and driving mode state of the vehicle and sending them to the processor; A processor for judging the driving state of the vehicle according to the received maximum discharge power of the battery, remaining battery capacity, electric motor power, high-voltage accessory power, engine power and the obtained engine speed, engine special requirements, engine start request data, clutch state, throttle state and driving mode state of the vehicle, and making a selection of the driving mode of the vehicle.

[0023] A computer readable storage medium storing a computer program, wherein the computer program is executed by a processor to make the device where the computer readable storage medium is located execute the intelligent switching method of the hybrid vehicle driving mode.

[0024] A vehicle characterized by a switching system of an intelligent switching method of a hybrid vehicle driving mode.

[0025] All other embodiments obtained by those skilled in the art without creative labor based on the embodiments in the present application belong to the scope of protection of the present application.

Claims

1. A method for intelligent switching of driving modes in a hybrid vehicle, characterized in that, Specifically, the following steps are included: S1: Before starting the vehicle, calculate the required power of the whole vehicle, the maximum power of the pure electric drive mode, the maximum power of the series drive mode, and the maximum power of the parallel drive mode according to the user's needs. Among them, the maximum power of the pure electric drive mode is less than the maximum power of the series drive mode, which is less than the maximum power of the parallel drive mode. Determine whether the required power of the whole vehicle is not greater than the maximum power of the pure electric drive mode. If yes, the vehicle adopts the pure electric drive mode; if not, proceed to step S2. S2: Determine whether the vehicle's required power is not greater than the maximum power of the series drive mode. If yes, the vehicle adopts the series drive mode; otherwise, the vehicle adopts the parallel drive mode.

2. The intelligent switching method for hybrid vehicle drive modes according to claim 1, characterized in that, The formula for calculating the required power of the entire vehicle is as follows: P req =P HV +P D ; The formula for calculating the maximum power in pure electric drive mode is: P E = P BMS -P HV ; The formula for calculating the maximum power in series drive mode is: P S =mix(P ICE ,P GMot )+ P BMS -P HV ; The formula for calculating the maximum power in parallel drive mode is: P p =P ICE + P BMS -P HV ; Among them, P req For the power required by the whole vehicle, P HV The power requirements for high-voltage accessories in the vehicle mainly include the real-time power of high-voltage DC-DC converters and the real-time power of AC or PTC converters. D Power required for vehicle drive; P E This represents the maximum power in pure electric drive mode, P BMS Maximum discharge power of the power battery; P s For the maximum power in series drive mode, P ICE P is the engine's maximum power. GMot P is the maximum generating capacity of the generator. p This represents the maximum power in parallel drive mode.

3. The intelligent switching method for hybrid vehicle drive modes according to claim 1, characterized in that, It also includes a method for switching drive modes during vehicle operation, specifically comprising the following steps: D1: Determine whether the vehicle's current driving mode is pure electric drive mode. If yes, proceed to step D2.1; otherwise, proceed to step D2.

2. D2.1: Determine if the remaining battery power is not less than the first set power level. If yes, maintain pure electric drive mode; otherwise, proceed to step D2.

2. D2.2: Determine if there is an engine start request. If yes, proceed to step D3.1; otherwise, proceed to step D3.

2. D3.1: Determine whether the vehicle's current drive mode is series drive mode. If yes, proceed to step D4.1; otherwise, proceed to step D4.

2. D3.2: Determine if the remaining battery power is not less than the second set power level. If yes, maintain pure electric drive mode; otherwise, proceed to step D3.

1. D4.1: Determine if there are any special requirements for the engine. If yes, maintain the series drive mode; otherwise, proceed to step D4.

2. D4.2: Determine whether the vehicle's current drive mode is parallel drive mode. If yes, proceed to step D5.1; otherwise, proceed to step D2.

2. D5.1: Determine if the vehicle clutch is available. If yes, proceed to step D5.2; otherwise, activate the series drive mode. D5.2: Determine if the current vehicle speed is not greater than the set vehicle speed. If yes, start the series drive mode; otherwise, maintain the parallel drive mode.

4. The intelligent switching method for hybrid vehicle drive modes according to claim 3, characterized in that: The first set charge is 5% of the total battery capacity, the second set charge is 25% of the total battery capacity, and the set vehicle speed is 80 km / h.

5. A switching system employing the intelligent switching method for hybrid vehicle drive modes according to any one of claims 1-4, characterized in that, include: The battery data module is used to collect current, voltage, and temperature data of the vehicle battery, calculate the battery's maximum discharge power and remaining battery capacity, and send them to the processor. The motor data module is used to collect motor power parameters, high-voltage accessory power parameters, and motor speed, calculate motor power and high-voltage accessory power, and send them to the processor. The engine data module is used to collect engine power parameters and engine speed, and send the calculated engine power, acquired engine speed, engine special requirements, and engine start request data to the processor. The user requirements module is used to collect the vehicle's clutch status, throttle status, and drive mode status and send them to the processor. The processor is used to determine the current driving state of the vehicle based on the received maximum discharge power of the battery, the remaining battery power, the power of the electric motor, the power of the high-voltage accessories, the engine power, as well as the acquired engine speed, engine special requirements, engine start request data, vehicle clutch status, throttle status, and drive mode status, and to select the vehicle driving mode.

6. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by a processor, it causes the device containing the computer-readable storage medium to perform the method of any one of claims 1-4.

7. A vehicle, characterized in that: A switching system that operates the intelligent switching method for hybrid vehicle drive modes as described in claim 5.

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