Hydrogen-electric plug-in hybrid power system vehicle and hydrogen-electric plug-in hybrid power system vehicle control method

Abstract

The application discloses a hydrogen-electric plug-in hybrid power system vehicle and a hydrogen-electric plug-in hybrid power system vehicle control method, and relates to the field of hydrogen-electric vehicles.The hydrogen-electric plug-in hybrid power system vehicle comprises a power system, an energy storage system, a transmission system, a conduction system, a conversion system and an output system.The power system comprises a hydrogen power system and an electric power system.The energy storage system comprises a hydrogen energy storage system and an electric energy storage system.The transmission system comprises a gearbox system.The conduction system comprises a hydrogen energy pipeline system and an electric energy line system.The conversion system comprises an energy conversion system.The output system comprises a kinetic energy output system.Through the threshold limit of the optimal economic working interval, the switching point of the power source is controlled in the optimal state.Through the expected torque, the speed of the hydrogen internal combustion engine is calculated and controlled, so that the speed control of the hydrogen internal combustion engine has a clear target and curve.Through tracking the battery power state, the timeliness of switching the working mode and the cost performance of energy utilization are ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of hydrogen electric vehicles, in particular to a hydrogen electric plug-in hybrid power system vehicle, a hydrogen electric plug-in hybrid power system vehicle control method, a hydrogen electric plug-in hybrid power system vehicle working mode control method electronic device, a storage medium and a simulation platform. BACKGROUND

[0002] Due to the significant advantages of zero carbon emissions and low cost, as well as a relatively strong manufacturing foundation and low-purity hydrogen fuel requirements, hydrogen internal combustion engines and hydrogen internal combustion engine vehicles have been included in the new energy vehicle industry development plan and have become one of the important directions of hydrogen energy application. However, compared with fuel engines, hydrogen internal combustion engines still have the following two pain points and difficulties that hinder their development and mass production:

[0003] 1. Range problem. The volume hydrogen storage density of hydrogen cylinders is generally 40g / L, and the space of a general passenger vehicle can only arrange about 100-150L of hydrogen cylinders, which is equivalent to storing about 4Kg-6Kg of hydrogen. When hydrogen consumption is calculated at 1.3Kg / 100Km, the vehicle's range is between 300-460Km. After the hydrogen cylinder gradually reduces the pressure due to use and cannot meet the hydrogen supply pressure requirements of the hydrogen internal combustion engine, the residual hydrogen in the hydrogen cylinder cannot be used, resulting in a lower actual range and failing to provide users with a good driving experience.

[0004] 2. Slow power improvement problem. In order to reduce nitrogen oxide emissions, hydrogen internal combustion engines generally need to work at a high dilution ratio of more than 2, which means that higher intake air is required to meet the transient operating condition changes. This inevitably results in a much slower torque increase speed of the hydrogen internal combustion engine, and the driver will feel that the engine is powerless and the vehicle speed is slow after stepping on the accelerator.

[0005] Therefore, a related scheme of a hydrogen electric plug-in hybrid power system vehicle is needed, which can reasonably allocate power output shares and adapt to vehicle states and external environmental conditions. SUMMARY

[0006] The purpose of the present application is to provide a hydrogen electric plug-in hybrid power system vehicle, a hydrogen electric plug-in hybrid power system vehicle control method, a hydrogen electric plug-in hybrid power system vehicle working mode control method electronic device, a storage medium and a simulation platform, which at least solve the problem of reasonably allocating power output shares and solve one of the problems of adapting to vehicle states and external environmental conditions.

[0007] The present application provides the following scheme:

[0008] According to one aspect of the present application, a hydrogen electric plug-in hybrid power system vehicle is provided, which comprises a power system, an energy storage system, a transmission system, a conduction system, a conversion system and an output system.

[0009] The power system comprises a hydrogen power system and an electric power system;

[0010] The energy storage system comprises a hydrogen energy storage system and an electric energy storage system;

[0011] The transmission system comprises a gearbox system;

[0012] The conduction system comprises a hydrogen energy pipeline system and an electric energy line system;

[0013] The conversion system comprises an energy conversion system;

[0014] The output system comprises a kinetic energy output system.

[0015] Further comprising:

[0016] The hydrogen energy storage system is connected to the hydrogen power system through the hydrogen energy pipeline system, and is connected to the kinetic energy output system through the gearbox system;

[0017] The electric energy storage system is connected to the electric power system through the electric energy line system, and is connected to the kinetic energy output system through the gearbox system;

[0018] The gearbox system is connected to the electric energy storage system through the energy conversion system and the electric energy line system;

[0019] The energy conversion system comprises a generator and an inverter.

[0020] According to the two aspects of the present application, a hydrogen-electric plug-in hybrid power system vehicle control method is provided, and the hydrogen-electric plug-in hybrid power system vehicle control method comprises:

[0021] Obtaining state information of an accelerator pedal opening degree, a battery charge and a vehicle speed;

[0022] The state information of the accelerator pedal opening degree comprises accelerator pedal opening degree states corresponding to an empty accelerator and an effective accelerator;

[0023] The state information of the battery charge comprises a battery charge state compared with a preset lower charge threshold;

[0024] The state information of the vehicle speed comprises a vehicle speed state of parking or driving;

[0025] According to the state information of the accelerator pedal opening degree, the battery charge and the vehicle speed, a power output control mode is set;

[0026] The power output control mode comprises idle charge, energy recovery, pure electric driving, series power generation, series assistance, separate direct drive and parallel driving power output control modes.

[0027] According to three aspects of the present application, a control method of working mode of hydrogen-electric plug-in hybrid power system vehicle is provided, which comprises:

[0028] Obtaining characteristic curve database of hydrogen internal combustion engine;

[0029] In combination with emission requirement and knock risk working condition point limitation, obtaining hydrogen internal combustion engine economic working interval data according to the characteristic curve database of hydrogen internal combustion engine;

[0030] The hydrogen internal combustion engine economic working interval data comprises minimum speed N ENG ;

[0031] Obtaining data of N ENG , speed ratio of hydrogen internal combustion engine to differential and wheel radius;

[0032] Obtaining vehicle speed V N according to the data of N ENG , speed ratio of hydrogen internal combustion engine to differential and wheel radius;

[0033] Setting the vehicle speed V N as switching point of preferred power source of vehicle power system;

[0034] Obtaining current vehicle speed V and comparing with the vehicle speed V N ;

[0035] When the vehicle speed V≤V N , providing driving torque of vehicle by taking driving motor as one of power sources;

[0036] When the vehicle speed V>V N , determining to enter hydrogen internal combustion engine economic working interval and providing driving torque of vehicle by taking hydrogen internal combustion engine as main power source.

[0037] Further, the control method of working mode of hydrogen-electric plug-in hybrid power system vehicle comprises:

[0038] Obtaining PEDAL MAP corresponding to accelerator pedal opening and vehicle speed;

[0039] The PEDAL MAP comprises information corresponding to current vehicle acceleration demand of accelerator pedal opening;

[0040] Obtaining information corresponding to wheel edge required torque of power output control mode according to the information corresponding to current vehicle acceleration demand of accelerator pedal opening;

[0041] Controlling wheel edge required torque according to accelerator pedal opening corresponding to current power output control mode;

[0042] Based on the correlation between acceleration a and wheel edge driving force F, obtaining formula F轮边 = δma;

[0043] wherein m is the vehicle mass and δ is the vehicle mass conversion factor;

[0044] the acquisition formula

[0045] wherein T 轮边 is the wheel-side required torque and r is the wheel radius.

[0046] Further, when the vehicle speed V≤V N , the driving motor is used as one of the power sources to provide the driving torque of the vehicle, including:

[0047] acquiring a preset lower limit threshold value SOC 保电 of the charge of the power battery and the battery charge SOC of the power battery;

[0048] when the vehicle speed V≤V N and when the power battery SOC<SOC 保电 , entering the series power generation mode to start the hydrogen internal combustion engine and control the clutch to be in the disengaged state;

[0049] when the vehicle speed V≤V N and when the power battery SOC≥SOC 保电 , according to the hydrogen internal combustion engine optimal economic interval to confirm the hydrogen internal combustion engine output power interval P ENG , the mechanical transmission efficiency η ENG of the hydrogen internal combustion engine and the power generation efficiency η GM of the generator, the power generation power interval P GM of the generator is obtained as P ENG ×η ENG ×η GM .

[0050] Further, when the vehicle speed V>V N , it is determined to enter the hydrogen internal combustion engine economic working interval, and the hydrogen internal combustion engine is used as the main power source to provide the driving torque of the vehicle, including:

[0051] when the vehicle speed V>V N , the hydrogen internal combustion engine is used as the main power source to provide the driving force of the vehicle, and the clutch is controlled to be engaged;

[0052] wherein the expected torque T ENGD of the hydrogen internal combustion engine is obtained;

[0053] when T ENGD is in the hydrogen internal combustion engine economic working interval, entering the single direct drive mode and controlling the driving motor to follow the rotation;

[0054] when T ENGDGreater than the maximum torque of the hydrogen internal combustion engine economic working interval and the power battery SOC > SOC 保电 Enter parallel driving mode, and the hydrogen internal combustion engine and the driving motor jointly provide driving force.

[0055] When T ENGD Greater than the maximum torque of the hydrogen internal combustion engine economic working interval and the power battery SOC ≤ SOC 保电 Enter single direct drive mode.

[0056] According to the four aspects of the present application, a hydrogen-electric plug-in hybrid power system vehicle control device is provided, which comprises:

[0057] An information acquisition module is configured to acquire state information of an accelerator pedal opening degree, a battery charge, and a vehicle speed.

[0058] The state information of the accelerator pedal opening degree comprises accelerator pedal opening degree states corresponding to an empty accelerator and an effective accelerator.

[0059] The state information of the battery charge comprises a battery charge state compared with a preset lower charge threshold.

[0060] The state information of the vehicle speed comprises a vehicle speed state of parking or driving.

[0061] A mode control module is configured to set a power output control mode according to the state information of the accelerator pedal opening degree, the battery charge, and the vehicle speed.

[0062] The control mode of the power output comprises power output control modes of idle charge, energy recovery, pure electric driving, series generation, series assistance, single direct drive, and parallel driving.

[0063] According to the five aspects of the present application, an electronic device is provided, which comprises a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory complete mutual communication through the communication bus.

[0064] The memory stores a computer program, and when the computer program is executed by the processor, the processor executes the steps of the hydrogen-electric plug-in hybrid power system vehicle working mode control method.

[0065] According to the six aspects of the present application, a computer readable storage medium is provided, which stores a computer program executable by an electronic device, and when the computer program runs on the electronic device, the electronic device executes the steps of the hydrogen-electric plug-in hybrid power system vehicle working mode control method.

[0066] According to the seven aspects of the present application, a simulation platform is provided, which comprises:

[0067] An electronic device for implementing the steps of the hydrogen-electric plug-in hybrid power system vehicle control;

[0068] A processor, the processor running a program, when the program is running, executing the steps of the hydrogen-electric plug-in hybrid power system vehicle control from the data output by the electronic device;

[0069] A storage medium for storing a program, the program executing the steps of the hydrogen-electric plug-in hybrid power system vehicle control for data output from the electronic device when running.

[0070] Through the above scheme, the following beneficial technical effects are obtained:

[0071] The present application can obtain a usable hydrogen internal combustion engine optimal economic working interval by combining emission, knock risk and other working condition point restrictions, and the switching point of the power source is controlled in the optimal state through threshold limitation of the optimal economic working interval.

[0072] The present application calculates and controls the speed of the hydrogen internal combustion engine through the expected torque, so that the speed control of the hydrogen internal combustion engine has a clear target and curve.

[0073] The present application tracks the battery power state to ensure the timeliness of switching the working mode and the high cost performance of energy utilization. BRIEF DESCRIPTION OF DRAWINGS

[0074] Figure 1 is a structural diagram of a hydrogen-electric plug-in hybrid power system vehicle provided by one or more embodiments of the present application.

[0075] Figure 2 is a flowchart of a hydrogen-electric plug-in hybrid power system vehicle control method provided by one or more embodiments of the present application.

[0076] Figure 3 is a flowchart of a hydrogen-electric plug-in hybrid power system vehicle working mode control method provided by one or more embodiments of the present application.

[0077] Figure 4 is a structural diagram of a hydrogen-electric plug-in hybrid power system vehicle control device provided by one or more embodiments of the present application.

[0078] Figure 5 is a schematic diagram of a hydrogen-electric plug-in hybrid power system provided by one specific embodiment of the present application.

[0079] Figure 6 is a schematic diagram of a hydrogen-electric plug-in hybrid power system control strategy provided by one specific embodiment of the present application.

[0080] Figure 7 is a schematic diagram of a hydrogen-electric plug-in hybrid power system control strategy working mode provided by one specific embodiment of the present application.

[0081] Figure 8 This is an electronic device structural block diagram of a method for controlling the operating mode of a hydrogen-electric plug-in hybrid power system vehicle provided in one or more embodiments of the present invention.

[0082] Reference numerals: 10, Hydrogen storage system; 20, Power battery; 30, Storage battery; 40, Exhaust aftertreatment system; 50, Hydrogen internal combustion engine assembly; 60, DC-DC integrated OBC unit; 70, Drive motor assembly; 80, Drive shaft; 90, Differential; 100, Wheel; 110, Energy replenishment port; 501, Internal combustion engine flywheel; 601, DC-DC module; 602, OBC module; 701, Generator; 702, Inverter; 703, Input shaft; 704, Drive motor; 705, Generator pinion; 706, Generator gear; 707, Clutch; 708, Coupling gear (large); 709, Coupling gear (medium); 710, Coupling gear (small); 711, Reduction gear (large); 712, Reduction gear (small). Detailed Implementation

[0083] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0084] Figure 1 This is a structural diagram of a hydrogen-electric plug-in hybrid powertrain vehicle provided in one or more embodiments of the present invention.

[0085] like Figure 1 The hydrogen-electric plug-in hybrid vehicle shown includes: a power system, an energy storage system, a transmission system, a conduction system, a conversion system, and an output system;

[0086] The power system includes hydrogen power systems and electric power systems;

[0087] Energy storage systems include hydrogen energy storage systems and electrical energy storage systems;

[0088] The transmission system includes the gearbox system;

[0089] The transmission system includes hydrogen pipeline systems and electrical power line systems;

[0090] The conversion system includes an energy conversion system;

[0091] The output system includes a kinetic energy output system.

[0092] Specifically, the hydrogen power system includes a hydrogen internal combustion engine; the electric power system includes a driving motor; the hydrogen energy storage system includes a hydrogen storage tank and the like; the electric energy storage system includes a power battery, a storage battery and the like; the gearbox system includes a transmission shaft connected with the hydrogen internal combustion engine, the driving motor, the generator, the differential and the like, and further includes a reduction gear, a coupling gear, a clutch and the like; the hydrogen energy pipeline system includes a hydrogen fuel pipeline, a pipeline valve, a pressure valve, a hydrogen injection port system and the like; the electric energy line system includes a hard wire, a switch, a boost / buck module, an AC / DC module, a charging port and the like; the energy conversion system includes a generator, an inverter and the like; the kinetic energy output system includes a differential and a wheel.

[0093] In the embodiment, the hydrogen-electric plug-in hybrid power system vehicle includes:

[0094] The hydrogen energy storage system is connected with the hydrogen power system through the hydrogen energy pipeline system, and is further connected with the kinetic energy output system through the gearbox system;

[0095] The electric energy storage system is connected with the electric power system through the electric energy line system, and is further connected with the kinetic energy output system through the gearbox system;

[0096] The gearbox system is connected with the electric energy storage system through the energy conversion system and the electric energy line system;

[0097] The energy conversion system includes a generator and an inverter.

[0098] Specifically, the two-way driving differential makes the energy loop of the vehicle rotation output include, from the hydrogen storage tank, through the hydrogen internal combustion engine combustion, driving the transmission shaft to drive the gear system in the gearbox, and finally driving the vehicle rotation through the differential; also includes, from the battery pack, through the electromagnetic work of the motor, driving the transmission shaft to drive the gear system in the gearbox, and finally driving the vehicle rotation through the differential;

[0099] When decelerating, the generator absorbs the kinetic energy from the gearbox, converts it into a direct current signal through the inverter, and injects it into the power battery for storage.

[0100] In one embodiment, the hydrogen-electric plug-in hybrid power system vehicle includes a hydrogen internal combustion engine, a hydrogen supply system, an exhaust aftertreatment system, a driving motor assembly, a power battery, a storage battery, a DCDC on-board charging all-in-one machine, a differential, a wheel, an energy supplement interface and the like.

[0101] The fuel of the hydrogen internal combustion engine is connected to the cylinder of the internal combustion engine through the hydrogen supply pipeline of the hydrogen supply system, and the hydrogen supply system includes a hydrogen storage bottle, a pressure reducing valve, a hydrogen bottle on-off valve, a safety relief device, a temperature sensor, a pressure sensor and the like. The hydrogen supply system needs to provide the required hydrogen according to the hydrogen supply pressure requirement of the hydrogen internal combustion engine (not expanded in detail in the embodiment, only described as a system that must be included in the whole vehicle configuration).

[0102] The exhaust port of the hydrogen internal combustion engine is connected to an exhaust aftertreatment system through an exhaust pipeline, and the exhaust aftertreatment system is used to adsorb nitrogen oxides and excess oxygen generated during combustion of the hydrogen internal combustion engine (there is currently no hydrogen internal combustion engine emission regulation requirement, so the specific composition of the exhaust aftertreatment system is not expanded in detail in this example, and only described as a system that must be included in the overall vehicle composition).

[0103] The flywheel end of the hydrogen internal combustion engine is connected to the input shaft of the drive motor assembly, the input shaft has a large gear, the large gear is engaged with a small gear, and the small gear is connected to the shaft of the generator. There is also an electrically controlled clutch inside the drive motor, the driving disc of the clutch is connected to the large gear at the end of the input shaft, and the driven disc is connected to another large gear. When the clutch is engaged, the torque of the engine can be transmitted. The large gear of the driven disc is engaged with the middle gear of the coupling structure, the middle gear is also engaged with a small gear, and the small gear is connected to the shaft of the drive motor. The middle gear is connected to the small gear of the reduction gear through the shaft, and the small gear is engaged with the large gear of the reduction mechanism. The generator and the drive motor are connected to the inverter through a wire harness, and the inverter is responsible for the mutual conversion of alternating current and direct current. In particular, the generator, drive motor, clutch, inverter, etc. can also be separate devices. Considering the layout space, integration degree and current market product application situation, the integrated drive motor assembly has more advantages in application.

[0104] The output end of the drive motor assembly is connected to the transmission shaft, and the other end of the transmission shaft is connected to the differential. Finally, the torque is transmitted to the wheels.

[0105] The power battery is connected to the drive motor assembly and the DCDC on-board charging integrated machine through a wire harness. The power battery can provide energy for the operation of the drive motor, and can also be used as a charging and energy storage device, which can be charged through the DC charging connector of the charging pile or through the brake energy recovery function. Further, it can also be charged through the AC charging connector of the charging pile through the OBC charging module in the DCDC on-board charging integrated machine.

[0106] The DCDC on-board charging integrated machine serves as the voltage conversion and energy transmission mechanism of the vehicle. The DCDC module can convert and transmit the energy of the power battery to the low-voltage power supply system and the storage battery of the vehicle, and the OBC module can convert alternating current into direct current. Further, the OBC module is not a special requirement. Without the module, the vehicle can be charged through the external DC charging connector.

[0107] The energy supplement interface includes a hydrogen supplement interface, a DC charging interface and an AC charging interface, which can supplement hydrogen for the hydrogen storage bottle and energy for the power battery.

[0108] Figure 2This is a flowchart of a hydrogen-electric plug-in hybrid vehicle control method provided in one or more embodiments of the present invention.

[0109] like Figure 2 The hydrogen plug-in hybrid electric vehicle control method shown includes:

[0110] Step S1: Obtain status information of accelerator pedal opening, battery charge, and vehicle speed;

[0111] The accelerator pedal opening status information includes the accelerator pedal opening status corresponding to no throttle and active throttle;

[0112] Battery charge status information includes battery charge status compared to a preset lower charge threshold.

[0113] Vehicle speed status information includes the speed status when the vehicle is parked or moving.

[0114] Step S2: Set the power output control mode based on the accelerator pedal opening, battery charge and vehicle speed information;

[0115] The power output control modes include idle charging, energy recovery, pure electric drive, series power generation, series assist, individual direct drive, and parallel drive.

[0116] Specifically, this embodiment confirms the working mode of the power system under different operating conditions, mainly by referring to the states of three variables: accelerator pedal opening, power battery state of charge, and vehicle speed.

[0117] Based on the depth of the accelerator pedal, it can be divided into two ranges: empty accelerator and effective accelerator. The empty accelerator range means that the driver does not need to accelerate.

[0118] To ensure battery safety, the state of charge of a power battery generally has a lower limit for over-discharge. In the vehicle control strategy, considering transient conditions or special scenarios such as climbing, an additional usage range needs to be reserved for each to limit the charge. When the charge is below the final lower limit range, it is defined as the charge-preserving state, and when it is greater than or equal to the lower limit range, it is defined as the non-charge-preserving state.

[0119] Based on vehicle speed, the driving state can be divided into parking and driving states. The powertrain control method is determined based on the system configuration and the vehicle's state. This includes the following operating modes:

[0120] Idle charging. When the vehicle is parked and the battery is in a charge-maintaining state, the generator drives the hydrogen internal combustion engine to a certain speed, after which the engine ignites and starts. The engine then drives the generator to charge the battery. At this time, the clutch is disengaged, the drive motor stops, and the energy flow is from the generator to the battery via the inverter. If the vehicle is parked but the battery is not in a charge-maintaining state, the entire powertrain system will not operate.

[0121] Energy recovery; the vehicle is in running state and the accelerator pedal is in the idle interval, the drive motor outputs negative torque, that is, the drive motor does not output driving force, provides braking force, and rotates following the inertial rotation of the wheels, and due to the magneto-electric effect, the drive motor becomes a generator at this time, and charges the power battery through the inverter. When the brake pedal is depressed, it is called braking energy recovery, and when the brake pedal is not depressed, it is called coasting energy recovery.

[0122] Pure electric drive; the vehicle is in running state, the accelerator pedal is depressed, the power battery is in non-power preservation state, the drive motor is controlled to provide driving force, the clutch is controlled to be in the separated state, and the hydrogen internal combustion engine is controlled to be in the stopped state, at this time the power battery discharges and provides driving energy for the drive motor through the inverter.

[0123] Series power generation; the vehicle is in running state, the accelerator pedal is depressed, the power battery is in non-power preservation state, the drive motor is controlled to provide driving force, the clutch is controlled to be in the separated state, and the hydrogen internal combustion engine is controlled to be in the working state to drive the generator to generate electricity, and the drive motor is provided with driving energy through the inverter, at this time the power battery neither charges nor discharges.

[0124] Series assistance; the vehicle is in running state, the accelerator pedal is depressed, the power battery is in non-power preservation state, the drive motor is controlled to provide driving force, the clutch is controlled to be in the separated state, and the hydrogen internal combustion engine is controlled to be in the working state to drive the generator to generate electricity, and the drive motor is provided with driving energy through the inverter, at this time the power battery discharges and provides driving energy for the drive motor.

[0125] Single direct drive; the vehicle is in running state, the accelerator pedal is depressed, the drive motor is controlled to be in the following rotation state, the clutch is controlled to be in the combined state, the hydrogen internal combustion engine is controlled to be in the working state, and the generator is controlled to be in the following rotation state, the hydrogen internal combustion engine alone provides driving force for the vehicle at this time, and the power battery neither charges nor discharges.

[0126] Parallel drive; the vehicle is in running state, the accelerator pedal is depressed, the power battery is in non-power preservation state, the drive motor is controlled to provide driving force, the clutch is controlled to be in the combined state, the hydrogen internal combustion engine is controlled to be in the working state, and the generator is controlled to be in the following rotation state, the hydrogen internal combustion engine and the drive motor jointly provide driving force for the vehicle at this time, and the power battery discharges.

[0127] Figure 3 The flowchart of the control method of the hydrogen-electric plug-in hybrid power system vehicle working mode provided by one or more embodiments of the present application.

[0128] The control method of the hydrogen-electric plug-in hybrid power system vehicle working mode as shown in Figure 3 The control method of the hydrogen-electric plug-in hybrid power system vehicle working mode includes:

[0129] obtaining a characteristic curve database of the hydrogen internal combustion engine;

[0130] In combination with the emission requirement and knock risk working condition point restriction, obtaining hydrogen internal combustion engine economic working interval data according to the characteristic curve database of the hydrogen internal combustion engine;

[0131] The hydrogen internal combustion engine economic working interval data includes minimum speed N ENG ;

[0132] Obtaining N ENG and the speed ratio of the hydrogen internal combustion engine to the differential and the wheel radius data;

[0133] Obtaining vehicle speed V ENG according to N N and the speed ratio of the hydrogen internal combustion engine to the differential and the wheel radius data;

[0134] Setting the vehicle speed V N as the switching point of the preferred power source of the vehicle power system;

[0135] Obtaining the current vehicle speed V and comparing the vehicle speed V N ;

[0136] When the vehicle speed V≤V N , the drive motor is used as one of the power sources to provide the driving torque of the vehicle;

[0137] When the vehicle speed V>V N , it is determined to enter the hydrogen internal combustion engine economic working interval, and the hydrogen internal combustion engine is used as the main power source to provide the driving torque of the vehicle.

[0138] Specifically, first, a hydrogen internal combustion engine bench test is established to obtain the external characteristic curve of the hydrogen internal combustion engine. Further, in combination with the emission, knock risk and other working condition point restrictions, the available hydrogen internal combustion engine optimal economic working interval is obtained, and the minimum speed in the interval is N ENG . According to N ENG and the speed ratio of the hydrogen internal combustion engine to the differential and the wheel radius, the corresponding vehicle speed V N can be calculated, and V N is set as the switching point of the preferred power source of the vehicle power system. When the vehicle speed V≤V N , the drive motor is used as a power source to provide the driving torque of the vehicle. When the vehicle speed V>V N , the hydrogen internal combustion engine economic working interval is entered, and the hydrogen internal combustion engine is used as the main power source to provide the driving torque of the vehicle.

[0139] In this embodiment, the control method of the hydrogen electric plug-in hybrid power system vehicle working mode includes:

[0140] Step S3, obtaining a PEDAL MAP corresponding to the accelerator pedal opening and the vehicle speed;

[0141] PEDAL MAP includes information on how the accelerator pedal opening corresponds to the current vehicle acceleration requirements;

[0142] Step S4: Based on the information about the accelerator pedal opening and the current vehicle acceleration demand, obtain the wheel-side torque demand information for the corresponding power output control mode.

[0143] Step S5: Based on the current power output control mode, control the wheel torque required according to the accelerator pedal opening.

[0144] Based on the relationship between acceleration a and wheel-side driving force F, the formula F is obtained. 轮边 =δma;

[0145] Where m is the vehicle mass and δ is the vehicle mass conversion factor;

[0146] Get Formula

[0147] Among them, T 轮边 Let r be the torque required at the wheel end, and r be the wheel radius.

[0148] Specifically, a table showing the relationship between the vehicle's accelerator pedal and speed, known as the driver's PEDALMAP, illustrates how the degree to which the driver depresses the accelerator corresponds to the required acceleration of the vehicle. This is achieved through a simplified formula F. 轮边 =δma can be used to determine the relationship between acceleration a and wheel-side driving force F. 轮边 Related, where δ is the vehicle mass conversion factor, which is related to the inertial force obtained from the component's rotational inertia and transmission ratio. Through The required torque T at the wheel end can be obtained. 轮边 Where r is the wheel radius. From this, we can obtain a table of the vehicle's required torque, with vehicle speed on the horizontal axis, accelerator pedal opening on the vertical axis, and the output being the wheel-side required torque T. 轮边 This table needs to be adjusted through calibration on the actual vehicle. If the vehicle has different driving modes such as Sport mode, Eco mode, Snow mode, etc., different tables can be designed, as the required torque at the wheel side is different at the same coordinate point.

[0149] Furthermore, through the wheel-side driving force T 轮边 Differential transmission efficiency η 90 差速 80 transmission shaft, transmission efficiency η 传动 The transmission ratio i between the large reduction gear 711 and the small reduction gear 712 can obtain the driving torque required by the coupling gear 709. Let it be the desired torque T D .

[0150] In this embodiment, when the vehicle speed V≤V NWhen the drive motor is used as one of the power sources, the driving torque provided to the vehicle includes:

[0151] Obtain the preset lower charge threshold (SOC) of the power battery. 保电 and the state of charge (SOC) of the power battery;

[0152] When the vehicle speed V≤V N And when the SOC of the power battery < SOC 保电 At this time, the hydrogen internal combustion engine is started in series power generation mode and the clutch is kept in the disengaged state.

[0153] When the vehicle speed V≤V N And when the SOC of the power battery is greater than or equal to the SOC 保电 At that time, the output power range P of the hydrogen internal combustion engine is determined according to the optimal economic range of the hydrogen internal combustion engine. ENG The mechanical transmission efficiency η of a hydrogen internal combustion engine ENG and the generator's power generation efficiency η GM Find the generator's power output range P. GM =P ENG ×η ENG ×η GM .

[0154] Specifically, when the vehicle speed V≤V N At this time, the drive motor acts as a power source, providing the vehicle with driving torque.

[0155] When the vehicle speed V≤V N And when the SOC of the power battery < SOC 保电 At this time, the hydrogen internal combustion engine is started in series power generation mode, and the clutch is kept in the disengaged state. Based on the desired torque T... D The required torque of the drive motor can be calculated from the radius ratio of the coupling gear (middle) 709 to the coupling gear (small) 710. According to the speed N of the drive motor TM The desired output power of the drive motor can be calculated. Further based on the efficiency η of the drive motor TM The input power requirement of the drive motor can be calculated. Divide by the mechanical transmission efficiency η of the hydrogen internal combustion engine ENG and the generator's power generation efficiency η GM The output power of the hydrogen internal combustion engine can be calculated. The operating torque T of the hydrogen internal combustion engine was confirmed through universal characteristics and calibration. ENGD and the corresponding N of the output speed ENGD The negative torque of the generator is confirmed by the radius ratio of the generator pinion 705 and the generator gear 706. The load on the hydrogen internal combustion engine is used to control its speed.

[0156] When the vehicle speed V≤V N and when the power battery SOC≥SOC 保电 , the hydrogen internal combustion engine output power interval P ENG can be determined according to the hydrogen internal combustion engine optimal economic interval, multiplied by the mechanical transmission efficiency η ENG of the hydrogen internal combustion engine and the power generation efficiency η GM of the generator, the power generation power interval P GM of the generator can be obtained, that is, P ENG ×

[0157] η ENG ×η GM .

[0158] In the embodiment, when the vehicle speed V>V N , it is determined to enter the hydrogen internal combustion engine economic working interval, and the hydrogen internal combustion engine is used as the main power source to provide the driving torque of the vehicle, including:

[0159] When the vehicle speed V>V N , the hydrogen internal combustion engine is used as the main power source to provide the driving force of the vehicle, and the clutch is controlled to be engaged;

[0160] wherein the expected torque T ENGD of the hydrogen internal combustion engine is obtained;

[0161] When T ENGD is within the hydrogen internal combustion engine economic working interval, the single direct drive mode is entered, and the driving motor is controlled to follow the rotation;

[0162] When T ENGD is greater than the maximum torque of the hydrogen internal combustion engine economic working interval and the power battery SOC>SOC 保电 , the parallel drive mode is entered, and the driving force is provided by the hydrogen internal combustion engine and the driving motor together;

[0163] When T ENGD is greater than the maximum torque of the hydrogen internal combustion engine economic working interval and the power battery SOC≤SOC 保电 , the single direct drive mode is entered.

[0164] Specifically, when P TMIN is determined to be within the interval P GM , the clutch is controlled to be disengaged, the hydrogen internal combustion engine is started to enter the series power generation mode, the working point torque T ENG of the hydrogen internal combustion engine and the output speed N ENG are determined through the universal characteristic and calibration, the negative torque T GM of the generator, that is, the load of the hydrogen internal combustion engine, is determined through the radius ratio of the power generation pinion 705 and the power generation ring gear 706, and is used to control the speed of the hydrogen internal combustion engine.

[0165] When P TMIN Confirmed in P GM When the range is short, it enters pure electric drive mode, controls the clutch to disengage, controls the hydrogen internal combustion engine to stop, and the power battery discharge power P PB =P TMIN .

[0166] When P TMIN Confirmed in P GM When the range is reached, the system enters series assist mode, disengages the clutch, and starts the hydrogen internal combustion engine. The operating point and output power of the hydrogen internal combustion engine within the economic zone are confirmed through universal characteristics and calibration. The power battery discharge power P... PB =P TMIN -P GM .

[0167] When the vehicle speed V > V N At this time, the hydrogen internal combustion engine serves as the primary power source, providing driving force for the vehicle and controlling clutch engagement. Based on the desired torque T... D The desired torque of the hydrogen internal combustion engine is calculated based on the radius ratio of the large coupling gear 708 and the medium coupling gear 709. When T ENGD Within the economic zone, it enters a standalone direct drive mode, controlling the drive motor to rotate accordingly. When T ENGD The torque is greater than the maximum torque in the economic zone and the power battery SOC > SOC. 保电 Entering parallel drive mode requires both the hydrogen internal combustion engine and the drive motor to provide driving force, and the driving torque T of the hydrogen internal combustion engine is calibrated. ENG Located within the economic zone, the drive motor's driving torque is determined by the formula... Find T TM The power battery discharges. When T ENGD The torque is greater than the maximum torque in the economic zone and the power battery SOC is less than or equal to the SOC. 保电 When it enters the independent direct drive mode, the engine cannot operate within the economic zone.

[0168] Figure 4 This is a structural diagram of a hydrogen-electric plug-in hybrid powertrain vehicle control device provided in one or more embodiments of the present invention.

[0169] like Figure 4 The hydrogen-electric plug-in hybrid vehicle control device shown includes: an information acquisition module and a mode control module;

[0170] The information acquisition module is used to acquire status information such as accelerator pedal opening, battery charge, and vehicle speed;

[0171] The accelerator pedal opening status information includes the accelerator pedal opening status corresponding to no throttle and active throttle;

[0172] The state information of the battery charge includes a battery charge state compared with a preset lower threshold of the battery charge;

[0173] The state information of the vehicle speed includes a vehicle speed state of parking or driving;

[0174] The mode control module is configured to set a power output control mode according to the state information of the accelerator pedal opening, the battery charge and the vehicle speed;

[0175] The control mode of the power output includes idle charge, energy recovery, pure electric drive, series power generation, series assist, single direct drive and parallel drive power output control modes.

[0176] It is worth noting that, although the system only discloses the information acquisition module and the mode control module, it does not mean that the device is limited to the above basic functional modules. On the contrary, the meaning expressed by the present application is that on the basis of the above basic functional modules, a person skilled in the art can add one or more functional modules to form an infinite number of embodiments or technical solutions in combination with the prior art. That is to say, the system is open rather than closed, and it cannot be considered that the protection scope of the present application is limited to the above disclosed basic functional modules because the present embodiment only discloses individual basic functional modules.

[0177] Figure 5 is a schematic diagram of a hydrogen-electric plug-in hybrid power system according to an embodiment of the present application.

[0178] Figure 6 is a schematic diagram of a hydrogen-electric plug-in hybrid power system control strategy according to an embodiment of the present application.

[0179] Figure 7 is a schematic diagram of a hydrogen-electric plug-in hybrid power system control strategy working mode according to an embodiment of the present application.

[0180] In one embodiment, as shown in Figure 5 the hydrogen-electric plug-in hybrid power system structure includes: 10, a hydrogen storage system; 20, a power battery; 30, a storage battery; 40, an exhaust aftertreatment system; 50, a hydrogen internal combustion engine assembly; 60, a DCDC integrated OBC all-in-one machine; 70, a drive motor assembly; 80, a transmission shaft; 90, a differential; 100, a wheel; 110, an energy supplement port; 501, an internal combustion engine flywheel; 601, a DCDC module; 602, an OBC module; 701, a generator; 702, an inverter; 703, an input shaft; 704, a drive motor; 705, a power generation pinion; 706, a power generation gear; 707, a clutch; 708, a coupling gear (large); 709, a coupling gear (medium); 710, a coupling gear (small); 711, a reduction gear (large); 712, a reduction gear (small).

[0181] In another specific embodiment, the hydrogen-electricity plug-in hybrid power system control strategy, as shown in Figure 6 includes: obtaining the current vehicle speed V, obtaining the accelerator pedal value A (indicating the depression depth of the accelerator pedal), and judging whether the SOC is in the power protection state (judging whether the power battery is in the low power state), according to the depression depth of the accelerator pedal, the empty accelerator and the effective accelerator are divided into two intervals, and the empty accelerator interval represents that the driver has no speed-up demand. The high and low of the vehicle speed can be divided into parking and driving states.

[0182] The power battery state of charge generally has a lower limit value for battery use safety. In the vehicle control strategy, a part of the use interval is additionally reserved for limitation considering the transient working condition or special scene such as climbing, and the lower limit interval is defined as the power protection state when it is lower than the final lower limit interval, and the non-power protection state when it is greater than or equal to the lower limit interval.

[0183] In another specific embodiment, the hydrogen-electricity plug-in hybrid power system control strategy working mode, as shown in Figure 7 includes:

[0184] In the two-dimensional coordinates of the accelerator pedal opening and the vehicle speed, according to the external characteristics of the vehicle power system (hydrogen internal combustion engine), the working mode is switched in different coordinate regions.

[0185] Figure 8 is an electronic device structure block diagram of the hydrogen-electricity plug-in hybrid power system vehicle working mode control method provided by one or more embodiments of the application.

[0186] As shown in Figure 8 , the application provides an electronic device, including: a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory complete mutual communication through the communication bus;

[0187] The memory stores a computer program, and when the computer program is executed by the processor, the processor executes the steps of the hydrogen-electricity plug-in hybrid power system vehicle working mode control method.

[0188] The application also provides a computer readable storage medium, which stores the steps of the hydrogen-electricity plug-in hybrid power system vehicle working mode control method executable by the electronic device.

[0189] The application also provides a simulation platform, including:

[0190] The electronic device is used to realize the steps of the hydrogen-electricity plug-in hybrid power system vehicle working mode control method;

[0191] The processor runs the program, and when the program runs, the data output from the electronic device executes the steps of the hydrogen-electricity plug-in hybrid power system vehicle working mode control method;

[0192] A storage medium for storing a program that, when executed, performs the steps of the control method for a hydrogen-electric hybrid power system vehicle operating mode on data output from an electronic device.

[0193] From the above description of the embodiments, those skilled in the art can clearly understand that the present application can be implemented by means of software plus necessary universal hardware platforms. Based on such an understanding, the technical solutions of the present application, in essence, or the parts that make contributions to the prior art, can be embodied in the form of a software product. The computer software product can be stored in a storage medium, such as a ROM / RAM, a magnetic disk, an optical disk, etc., and includes a number of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments of the present application.

[0194] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent substitutions for some or all of the technical features; and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A control method for the operating mode of a hydrogen-electric plug-in hybrid vehicle system, characterized in that, The control method for the operating mode of the hydrogen-electric plug-in hybrid powertrain vehicle includes: Obtain a database of characteristic curves for hydrogen internal combustion engines; Combining emission requirements and knock risk operating point limits, the economic operating range data of hydrogen internal combustion engines is obtained based on the characteristic curve database of hydrogen internal combustion engines; The hydrogen internal combustion engine economic working interval data includes a minimum speed N ENG ; N is obtained ENG and data of the speed ratio of the hydrogen internal combustion engine to the differential and the wheel radius; According to N ENG The vehicle speed V is obtained by taking data on the speed ratio from the hydrogen internal combustion engine to the differential and the wheel radius. N ; Vehicle speed V N Set as the switching point for the vehicle's primary power source; Get the current vehicle speed V and compare it with the vehicle speed V. N ; When the vehicle speed V≤V N At this time, the drive motor is used as one of the power sources to provide the vehicle's driving torque; When the vehicle speed V > V N When the vehicle enters the economic operating range of the hydrogen internal combustion engine, the hydrogen internal combustion engine is used as the main power source to provide the driving torque for the vehicle. Wherein, when the vehicle speed V > V N When the vehicle is determined to be in its economic operating range for the hydrogen internal combustion engine, the driving torque provided by the hydrogen internal combustion engine as the primary power source includes: When the vehicle speed V > V N At this time, the hydrogen internal combustion engine serves as the main power source, providing driving force for the vehicle and controlling the engagement of the clutch; Among them, the desired torque T of the hydrogen internal combustion engine is obtained. ENGD ; When T ENGD When the hydrogen internal combustion engine is in its economic operating range, it enters a separate direct drive mode and controls the drive motor to rotate accordingly. Obtain the preset lower charge threshold (SOC) of the power battery. 保电 and the state of charge (SOC) of the power battery; When T ENGD The torque is greater than the maximum torque in the economic operating range of the hydrogen internal combustion engine and the SOC of the power battery is greater than the SOC. 保电 It enters parallel drive mode, where the hydrogen internal combustion engine and the drive motor jointly provide driving force. When T ENGD The torque is greater than the maximum torque in the economic operating range of the hydrogen internal combustion engine and the SOC of the power battery is less than or equal to the SOC of the power battery. 保电 At that time, it enters the independent direct drive mode.

2. The control method for the operating mode of a hydrogen-electric plug-in hybrid powertrain vehicle according to claim 1, characterized in that, The control method for the operating mode of the hydrogen-electric plug-in hybrid powertrain vehicle includes: Obtain the PEDAL MAP of the corresponding accelerator pedal opening and vehicle speed; The PEDAL MAP includes information on how the accelerator pedal opening corresponds to the current vehicle acceleration requirements. Based on the information about the accelerator pedal opening and the current vehicle acceleration demand, obtain the wheel-side torque demand information for the corresponding power output control mode; Based on the current power output control mode, the required torque at the wheel is controlled according to the corresponding accelerator pedal opening. Based on the relationship between acceleration a and wheel-side driving force F, the formula is obtained. ; Where m is the vehicle mass and δ is the vehicle mass conversion factor; Get Formula ; Among them, T 轮边 Let r be the torque required at the wheel end, and r be the wheel radius.

3. The control method for the operating mode of a hydrogen-electric plug-in hybrid powertrain vehicle according to claim 2, characterized in that, When the vehicle speed V≤V N When the drive motor is used as one of the power sources, the driving torque provided to the vehicle includes: When the vehicle speed V≤V N And when the SOC of the power battery < SOC 保电 At this time, the hydrogen internal combustion engine is started in series power generation mode and the clutch is kept in the disengaged state. When the vehicle speed V≤V N And when the SOC of the power battery is greater than or equal to the SOC 保电 At that time, the output power range P of the hydrogen internal combustion engine is determined according to the optimal economic range of the hydrogen internal combustion engine. ENG The mechanical transmission efficiency η of a hydrogen internal combustion engine ENG and the generator's power generation efficiency η GM The power output range of the generator can be obtained. .

4. A control method for a hydrogen-electric plug-in hybrid vehicle, used to implement the control method for the operating mode of the hydrogen-electric plug-in hybrid vehicle as described in any one of claims 1 to 3, characterized in that, The hydrogen-electric plug-in hybrid powertrain vehicle control method includes: Acquire status information such as accelerator pedal opening, battery charge, and vehicle speed; The accelerator pedal opening status information includes the accelerator pedal opening status corresponding to no throttle and active throttle; Battery charge status information includes battery charge status compared to a preset lower charge threshold. Vehicle speed status information includes the speed status when the vehicle is parked or moving. The power output control mode is set based on the accelerator pedal opening, battery charge, and vehicle speed information. The power output control modes include idle charging, energy recovery, pure electric drive, series power generation, series assist, individual direct drive, and parallel drive power output control modes.

5. A hydrogen-electric plug-in hybrid vehicle, characterized in that, The method for controlling a hydrogen-electric plug-in hybrid vehicle as described in claim 4, wherein the hydrogen-electric plug-in hybrid vehicle comprises: a power system, an energy storage system, a transmission system, a conduction system, a conversion system, and an output system; The power system includes a hydrogen power system and an electric power system; The energy storage system includes a hydrogen energy storage system and an electrical energy storage system; The transmission system includes a gearbox system; The transmission system includes a hydrogen pipeline system and an electrical power line system; The conversion system includes an energy conversion system; The output system includes a kinetic energy output system.

6. The hydrogen-electric plug-in hybrid vehicle according to claim 5, characterized in that, include: The hydrogen energy storage system is connected to the hydrogen power system via a hydrogen energy pipeline system, and then connected to the kinetic energy output system via a gearbox system; The electric energy storage system is connected to the electric power system via the power line system, and then connected to the kinetic energy output system via the gearbox system; The gearbox system is connected to the energy storage system via an energy conversion system and an electrical power line system. The energy conversion system includes a generator and an inverter.

7. A vehicle control device for a hydrogen-electric plug-in hybrid power system, characterized in that, A control method for operating a hydrogen-electric plug-in hybrid vehicle operating mode as described in any one of claims 1 to 3, wherein the hydrogen-electric plug-in hybrid vehicle control device comprises: The information acquisition module is used to acquire status information such as accelerator pedal opening, battery charge, and vehicle speed; The accelerator pedal opening status information includes the accelerator pedal opening status corresponding to no throttle and active throttle; Battery charge status information includes battery charge status compared to a preset lower charge threshold. Vehicle speed status information includes the speed status when the vehicle is parked or moving. The mode control module is used to set the power output control mode based on the accelerator pedal opening, battery charge and vehicle speed information; The power output control modes include idle charging, energy recovery, pure electric drive, series power generation, series assist, individual direct drive, and parallel drive power output control modes.

8. An electronic device, characterized in that, include: The processor, communication interface, memory, and communication bus are connected, with the processor, communication interface, and memory communicating with each other via the communication bus. The memory stores a computer program that, when executed by the processor, causes the processor to perform the steps of the control method for the operating mode of a hydrogen-electric plug-in hybrid powertrain vehicle as described in any one of claims 1 to 3.

9. A computer-readable storage medium, characterized in that, It stores a computer program executable by an electronic device, which, when run on the electronic device, causes the electronic device to perform the steps of the control method for the operating mode of the hydrogen-electric plug-in hybrid power system vehicle as described in any one of claims 1 to 3.

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