A vehicle torque control method, device, electronic equipment and hybrid vehicle

Abstract

The vehicle torque control method, device, electronic equipment and hybrid vehicle provided by the present disclosure, which is applied to a hybrid vehicle including an engine and a motor, distributes a driving demand torque of the hybrid vehicle into an engine target torque and a motor target torque; when the hybrid vehicle is in a non-fault state, an actual engine torque is adjusted in a torque increasing manner according to a first step based on the engine target torque, or adjusted in a torque decreasing manner according to a second step, the first step being smaller than the second step; and the actual motor torque is adjusted based on the motor target torque corrected by using the driving demand torque and the adjusted actual engine torque, until the adjusted actual engine torque reaches the engine target torque. Through the engine torque control logic of slow torque increasing and fast torque decreasing, and in combination with the torque compensation advantage of the motor, the vehicle economy and driving dynamics of the hybrid vehicle can be balanced.

Description

Technical Field

[0001] This disclosure relates to the field of hybrid vehicle technology, and more particularly to a vehicle torque control method, device, electronic equipment, and hybrid vehicle. Background Technology

[0002] With increasing environmental awareness, hybrid vehicles, which combine power and environmental friendliness, have received widespread attention. Compared to traditional vehicles, hybrid vehicles add an electric motor, using both the motor and engine as a hybrid power source to provide driving force. Furthermore, the power from the engine and motor can complement each other.

[0003] However, existing torque control methods for hybrid vehicles do not take into account the torque compensation of the motor to the engine, which often delays meeting the vehicle's driving torque requirements, resulting in poor driving dynamics.

[0004] Therefore, how to balance the vehicle economy and driving performance of hybrid vehicles has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] In view of the above problems, this disclosure provides a vehicle torque control method, device, electronic equipment, and hybrid vehicle to overcome or at least partially solve the above problems. The technical solution is as follows:

[0006] A vehicle torque control method, applied to a hybrid vehicle, the hybrid vehicle including an engine and an electric motor, the method comprising:

[0007] The driving torque demand of the hybrid vehicle is allocated to obtain the target torque of the engine and the target torque of the electric motor;

[0008] Obtain the actual engine torque of the engine and the actual motor torque of the motor;

[0009] Determine whether the hybrid vehicle is in a fault state. If not, perform a first torque adjustment on the actual engine torque based on the engine target torque. The first torque adjustment is to increase the actual engine torque according to a first step length, or to decrease the actual engine torque according to a second step length, wherein the first step length is less than the second step length.

[0010] The target torque of the electric motor is corrected using the required driving torque and the adjusted actual engine torque.

[0011] A second torque adjustment is performed on the actual torque of the motor based on the corrected target torque of the motor.

[0012] Determine whether the adjusted actual engine torque reaches the engine target torque. If not, return to the step of performing the first torque adjustment based on the engine target torque according to the adjusted actual engine torque, until the adjusted actual engine torque reaches the engine target torque.

[0013] Optionally, the method further includes:

[0014] If the hybrid vehicle is determined to be in a fault state, a third torque adjustment is performed on the actual engine torque based on the engine target torque. The third torque adjustment includes adjusting the actual engine torque by increasing torque according to a third step length, or adjusting the actual engine torque by decreasing torque according to a fourth step length, wherein the third step length is greater than the first step length.

[0015] Determine whether the adjusted actual engine torque reaches the engine target torque. If not, return to the step of performing the third torque adjustment based on the engine target torque according to the adjusted actual engine torque, until the adjusted actual engine torque reaches the engine target torque.

[0016] Optionally, determining whether the adjusted actual engine torque reaches the engine target torque includes:

[0017] The engine torque difference between the target engine torque and the adjusted actual engine torque is obtained.

[0018] Determine whether the engine torque difference is within the preset engine torque error. If it is, determine that the adjusted actual engine torque has reached the engine target torque. If not, determine that the adjusted actual engine torque has not reached the engine target torque.

[0019] Optionally, the method further includes:

[0020] If the hybrid vehicle is determined to be in a faulty state, a fourth torque adjustment is performed on the actual torque of the motor based on the target torque of the motor.

[0021] Determine whether the adjusted actual torque of the motor reaches the target torque of the motor. If not, return to the step of performing the fourth torque adjustment using the target torque of the motor, based on the adjusted actual torque of the motor.

[0022] Optionally, determining whether the adjusted actual torque of the motor reaches the target torque of the motor includes:

[0023] The motor torque difference between the target torque of the motor and the adjusted actual torque of the motor is obtained;

[0024] Determine whether the motor torque difference is within the preset motor torque error. If yes, determine that the adjusted actual motor torque has reached the motor target torque. If no, determine that the adjusted actual motor torque has not reached the motor target torque.

[0025] Optionally, the fault state includes the hybrid vehicle's state of charge value being lower than a preset charge threshold and vehicle component failure.

[0026] Optionally, before allocating the driving torque demand of the hybrid vehicle to obtain the target engine torque and the target electric motor torque, the method further includes:

[0027] Obtain the accelerator pedal opening of the hybrid vehicle;

[0028] The driving torque required by the hybrid vehicle is obtained by using the accelerator pedal opening.

[0029] A vehicle torque control device is applied to a hybrid vehicle, the hybrid vehicle including an engine and an electric motor. The device includes: a driving demand torque distribution unit, an actual torque acquisition unit, a vehicle fault determination unit, a first engine torque adjustment unit, a motor target torque correction unit, a first electric motor torque adjustment unit, and a first torque determination unit.

[0030] The driving demand torque distribution unit is used to distribute the driving demand torque of the hybrid vehicle to obtain the target torque of the engine and the target torque of the electric motor.

[0031] The actual torque acquisition unit is used to acquire the actual engine torque of the engine and the actual motor torque of the motor.

[0032] The vehicle fault determination unit is used to determine whether the hybrid vehicle is in a fault state. If not, the first engine torque adjustment unit is triggered.

[0033] The first engine torque adjustment unit is used to perform a first torque adjustment on the actual engine torque based on the engine target torque, wherein the first torque adjustment is to increase the actual engine torque according to a first step length, or to decrease the actual engine torque according to a second step length, wherein the first step length is less than the second step length.

[0034] The motor target torque correction unit is used to correct the motor target torque using the driving demand torque and the adjusted actual engine torque;

[0035] The first motor torque adjustment unit is used to perform a second torque adjustment on the actual torque of the motor based on the corrected target torque of the motor.

[0036] The first torque determination unit is used to determine whether the adjusted actual engine torque reaches the engine target torque. If not, the first engine torque adjustment unit is triggered to perform a first torque adjustment on the actual engine torque based on the engine target torque according to the adjusted actual engine torque.

[0037] An electronic device includes at least one processor, at least one memory connected to the processor, and a bus; wherein the processor and the memory communicate with each other via the bus; the processor is used to call program instructions in the memory to execute the vehicle torque control method described above.

[0038] A hybrid vehicle uses the vehicle torque control method described in any of the above claims for vehicle torque control.

[0039] By means of the above technical solution, this disclosure provides a vehicle torque control method, device, electronic device, and hybrid vehicle. The method is applied to a hybrid vehicle, which includes an engine and a motor. The method includes: allocating the driving torque demand of the hybrid vehicle to obtain a target torque for the engine and a target torque for the motor; obtaining the actual torque of the engine and the actual torque of the motor; determining whether the hybrid vehicle is in a fault state; if not, performing a first torque adjustment on the actual torque of the engine based on the target torque of the engine, wherein the first torque adjustment is to increase the torque of the actual torque of the engine by a first step length, or to decrease the torque of the actual torque of the engine by a second step length, wherein the first step length is less than the second step length; correcting the target torque of the motor using the driving torque demand and the adjusted actual torque of the engine; performing a second torque adjustment on the actual torque of the motor based on the corrected target torque of the motor; determining whether the adjusted actual torque of the engine reaches the target torque of the engine; if not, returning to the step of performing the first torque adjustment on the actual torque of the engine based on the target torque of the engine, until the adjusted actual torque of the engine reaches the target torque of the engine. This disclosure utilizes engine torque control logic that involves slow torque increase and rapid torque decrease, combined with the torque compensation advantages of the electric motor, to improve the vehicle economy of hybrid vehicles while simultaneously satisfying their driving dynamics.

[0040] The above description is merely an overview of the technical solution disclosed herein. In order to better understand the technical means of this disclosure and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this disclosure more apparent and understandable, specific embodiments of this disclosure are described below. Attached Figure Description

[0041] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this disclosure. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0042] Figure 1 A schematic diagram of the architecture of a parallel hybrid power system for a hybrid vehicle provided in an embodiment of this disclosure is shown.

[0043] Figure 2 A schematic flowchart of one embodiment of the vehicle torque control method provided in this disclosure is shown;

[0044] Figure 3 A flowchart illustrating another embodiment of the vehicle torque control method provided in this disclosure is shown.

[0045] Figure 4 A flowchart illustrating another embodiment of the vehicle torque control method provided in this disclosure is shown.

[0046] Figure 5 A flowchart illustrating another embodiment of the vehicle torque control method provided in this disclosure is shown.

[0047] Figure 6 A schematic diagram of the structure of the vehicle torque control device provided in an embodiment of this disclosure is shown;

[0048] Figure 7 A schematic diagram of the structure of an electronic device provided in an embodiment of this disclosure is shown. Detailed Implementation

[0049] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0050] To better balance the vehicle economy and driving dynamics of hybrid vehicles, embodiments of this disclosure provide a vehicle torque control method applied to hybrid vehicles, which include an engine and an electric motor.

[0051] Optionally, the hybrid vehicle provided in this disclosure embodiment can be a hybrid heavy-duty truck.

[0052] Figure 1 The diagram shows the architecture of a parallel hybrid power system for a hybrid vehicle according to an embodiment of this disclosure. In addition to the conventional vehicle's mechanical power system (fuel tank-engine-transmission-final reducer-wheels), the hybrid vehicle also includes an electric path power system (battery-motor-transmission-final reducer-wheels). The vehicle control modes of the hybrid vehicle can include a pure electric control mode, an engine control mode, and a hybrid power control mode. In the pure electric control mode, the electric motor drives the vehicle alone; in the engine control mode, the engine drives the vehicle alone; and in the hybrid power control mode, the electric motor and engine jointly drive the vehicle.

[0053] In hybrid control mode, by utilizing the electric motor's fast torque response, the electric drive system can compensate for the engine's slow torque response, thereby quickly meeting the vehicle's driving torque requirements.

[0054] The engine control methods of hybrid vehicles include engine torque control, which targets the required torque, and engine speed control, which targets the required speed.

[0055] The motor control methods of hybrid vehicles include motor torque control, which takes the required torque as the control target, and motor speed control, which takes the required speed as the control target.

[0056] The vehicle torque control method provided in this disclosure can achieve vehicle torque control in the hybrid control mode of a hybrid vehicle based on engine torque control and electric motor torque control.

[0057] like Figure 2 The diagram shows a flowchart of one embodiment of the vehicle torque control method provided in this disclosure. The method may include:

[0058] S100 distributes the driving torque required by the hybrid vehicle to obtain the target torque of the engine and the target torque of the electric motor.

[0059] The driving torque demand refers to the total torque required by the driver to drive the hybrid vehicle. This embodiment of the disclosure can determine the driving torque demand of the hybrid vehicle based on the accelerator pedal signal.

[0060] Specifically, embodiments of this disclosure can allocate the required torque for driving based on specified vehicle parameters of the hybrid vehicle at the current moment. Optionally, the specified vehicle parameters may include battery charge, speed, and operating condition data.

[0061] This disclosure allows for the pre-construction of a torque distribution table related to the overall vehicle efficiency of a hybrid vehicle. Overall vehicle efficiency primarily refers to the fuel consumption per 100 kilometers, also known as fuel economy. The torque distribution table records specified vehicle parameters and driving demand torque distribution information, ensuring that the hybrid vehicle's fuel consumption is minimized during torque distribution. This disclosure allows the use of specified vehicle parameters at the current moment as query conditions to retrieve the torque distribution table. Based on the retrieved driving demand torque distribution information, the driving demand torque is allocated to the engine target torque and the electric motor target torque.

[0062] Among them, the engine target torque is the engine's required torque under engine torque control mode.

[0063] Among them, the target torque of the motor is the required torque of the motor under the motor torque control mode.

[0064] This embodiment of the present disclosure uses a torque distribution table to allocate the driving torque demand into the engine target torque and the electric motor target torque, which is beneficial for controlling the vehicle torque under the fuel and electricity saving requirements of hybrid vehicles, thereby improving the vehicle economy of hybrid vehicles.

[0065] S110, obtain the actual engine torque and the actual motor torque.

[0066] The actual engine torque is the engine's output torque at the current moment. The actual motor torque is the motor's output torque at the current moment.

[0067] The embodiments disclosed herein can obtain communication messages between the engine and the motor via the CAN (Controller Area Network) bus of the hybrid vehicle, and obtain the actual torque of the engine and the actual torque of the motor from the communication messages accordingly.

[0068] S120. Determine whether the hybrid vehicle is in a fault state. If not, proceed to step S130.

[0069] This disclosure embodiment can read various signals from the vehicle controller and the status of vehicle components via the CAN bus of the hybrid vehicle, thereby determining whether the hybrid vehicle is in a fault state.

[0070] Optionally, fault conditions include the state of charge of the hybrid vehicle being lower than a preset charge threshold and vehicle component failure.

[0071] Among them, the State of Charge (SOC) is the ratio of the remaining capacity of a battery to its capacity when it is fully charged, and it is usually expressed as a percentage.

[0072] The preset charge threshold can be set according to actual needs.

[0073] This embodiment of the present disclosure can determine that the hybrid vehicle is not in a faulty state when the state of charge value of the hybrid vehicle is not lower than a preset state of charge threshold and no fault is reported in the vehicle parts.

[0074] S130. Based on the engine target torque, perform a first torque adjustment on the engine actual torque, wherein the first torque adjustment is to increase the engine actual torque according to the first step length, or to decrease the engine actual torque according to the second step length, wherein the first step length is less than the second step length.

[0075] Specifically, in this embodiment, the target engine torque can be compared with the actual engine torque. If the target engine torque is greater than the actual engine torque, the actual engine torque is adjusted to increase torque according to the first step. If the target engine torque is less than the actual engine torque, the actual engine torque is adjusted to decrease torque according to the second step.

[0076] The specific values ​​for the first and second step lengths can be set according to the engine's fuel economy requirements.

[0077] This disclosure utilizes engine torque control logic that involves slow torque increase and rapid torque decrease. By taking advantage of the engine's own characteristics, torque can be increased slowly during power output and stopped quickly when power output ceases, thereby improving engine efficiency.

[0078] It is understood that the embodiments of this disclosure can maintain the current actual engine torque when the target engine torque is equal to the actual engine torque.

[0079] S140: Using the driving demand torque and the adjusted actual engine torque, correct the target torque of the motor.

[0080] Specifically, in this embodiment, the difference between the required driving torque and the adjusted actual engine torque can be calculated, and the target torque of the motor can be corrected based on the difference to obtain the corrected target torque of the motor.

[0081] To facilitate understanding, an example is provided below: Assume the required driving torque is 150 Nm, the target engine torque after torque distribution is 80 Nm, and the target electric motor torque is 70 Nm. If the actual engine torque after torque boosting is 77 Nm, then based on the difference of 3 between the target engine torque and the adjusted actual engine torque, the target electric motor torque is corrected from 70 Nm to 73 Nm.

[0082] S150, Perform a second torque adjustment on the actual torque of the motor based on the corrected target torque of the motor.

[0083] The second torque adjustment can be to increase the actual torque of the motor according to the fifth step, or to decrease the actual torque of the motor according to the sixth step.

[0084] This embodiment of the disclosure compares the corrected target torque of the motor with the actual torque of the motor. If the corrected target torque is greater than the actual torque, the actual torque is adjusted by increasing torque according to the fifth step. If the corrected target torque is less than the actual torque, the actual torque is adjusted by decreasing torque according to the sixth step.

[0085] The specific values ​​for the fifth and sixth steps can be set according to the energy economy requirements of the motor.

[0086] Optionally, the fifth step length can be the same as the sixth step length.

[0087] Optionally, in embodiments of this disclosure, the fifth step length can be set to be the same as the first step length to improve the overall vehicle comfort of the hybrid vehicle during motor torque compensation.

[0088] It is understood that the embodiments of this disclosure can maintain the current actual torque of the motor when the target torque of the motor is equal to the actual torque of the motor.

[0089] S160. Determine whether the adjusted actual engine torque reaches the engine target torque. If not, return to step S130 according to the adjusted actual engine torque until the adjusted actual engine torque reaches the engine target torque.

[0090] Specifically, this embodiment of the disclosure can obtain the engine torque difference between the engine target torque and the adjusted actual engine torque. It is determined whether the engine torque difference is within a preset engine torque error range. If it is, the adjusted actual engine torque is determined to have reached the engine target torque; otherwise, the adjusted actual engine torque is determined to have not reached the engine target torque.

[0091] The preset engine torque error can be set according to actual needs.

[0092] This embodiment of the disclosure can end the torque control process when the adjusted actual engine torque reaches the engine target torque.

[0093] This disclosure provides a vehicle torque control method applicable to hybrid vehicles comprising an engine and an electric motor. The method allocates the driving torque demand of the hybrid vehicle into a target engine torque and a target electric motor torque. When the hybrid vehicle is in a non-faulty state, based on the target engine torque, the actual engine torque is adjusted by increasing torque in a first step or decreasing torque in a second step, where the first step is smaller than the second step. The actual electric motor torque is adjusted based on the target electric motor torque corrected using the driving torque demand and the adjusted actual engine torque, until the adjusted actual engine torque reaches the target engine torque. This disclosure, through a slow torque increase and rapid torque decrease engine torque control logic combined with the torque compensation advantages of the electric motor, can balance the vehicle economy and driving dynamics of the hybrid vehicle.

[0094] In practical applications of hybrid vehicles, when a vehicle malfunctions, it is necessary to limit the motor torque to avoid causing more serious problems due to excessive torque compensation. This disclosed embodiment can determine that the hybrid vehicle is in a faulty state when its state of charge (SBC) value is below a preset SBC threshold or when any vehicle component malfunctions.

[0095] Optional, based on Figure 2 The method shown is as follows: Figure 3 The diagram shows another implementation of the vehicle torque control method provided in this disclosure. In this disclosure, step S200 can be executed when it is determined that the hybrid vehicle is in a fault state.

[0096] S200, based on the engine target torque, performs a third torque adjustment on the engine actual torque, wherein the third torque adjustment includes adjusting the engine actual torque by increasing torque according to a third step length, or adjusting the engine actual torque by decreasing torque according to a fourth step length, wherein the third step length is greater than the first step length.

[0097] Specifically, in this embodiment, the target engine torque can be compared with the actual engine torque. If the target engine torque is greater than the actual engine torque, the actual engine torque is adjusted to increase torque according to a third step. If the target engine torque is less than the actual engine torque, the actual engine torque is adjusted to decrease torque according to a fourth step.

[0098] The specific value of the third step can be set according to the engine power requirements under vehicle malfunction conditions.

[0099] Optionally, the third step length can be greater than the fourth step length, and the fourth step length can be equal to the second step length.

[0100] It is understood that the embodiments of this disclosure can maintain the current actual engine torque when the target engine torque is equal to the actual engine torque.

[0101] S210. Determine whether the adjusted actual engine torque reaches the engine target torque. If not, return to step S200 according to the adjusted actual engine torque until the adjusted actual engine torque reaches the engine target torque.

[0102] The explanation of step S210 can be found in step S160, and will not be repeated here.

[0103] This embodiment of the invention can end the engine torque adjustment process when the actual engine torque after adjustment reaches the engine target torque.

[0104] In the event of a vehicle malfunction, this embodiment enhances the engine's power by increasing the torque variation of the engine torque adjustment, thereby quickly meeting the driving torque requirements of a hybrid vehicle while limiting the motor's torque compensation.

[0105] Optional, based on Figure 3 The method shown is as follows: Figure 4 The diagram shows another implementation of the vehicle torque control method provided in this disclosure. In this disclosure, step S300 can be executed when it is determined that the hybrid vehicle is in a fault state.

[0106] S300 performs a fourth torque adjustment on the actual torque of the motor based on the target torque of the motor.

[0107] This embodiment of the invention compares the target torque of the motor with the actual torque of the motor. If the target torque is greater than the actual torque, the actual torque is adjusted by increasing torque according to a seventh step. If the target torque is less than the actual torque, the actual torque is adjusted by decreasing torque according to an eighth step.

[0108] The specific values ​​of the seventh and eighth steps can be set according to the motor power requirements under vehicle malfunction conditions.

[0109] Optionally, the seventh step length can be the same as the eighth step length.

[0110] Optionally, embodiments of this disclosure may set a uniform torque adjustment step size for the motor, i.e., the fifth, sixth, seventh, and eighth steps are the same, in order to improve the stability of the motor torque adjustment process.

[0111] It is understood that the embodiments of this disclosure can maintain the current actual torque of the motor when the target torque of the motor is equal to the actual torque of the motor.

[0112] S310. Determine whether the adjusted actual motor torque reaches the motor target torque. If not, return to step S300 according to the adjusted actual motor torque.

[0113] Specifically, in this embodiment, the difference between the target torque of the motor and the adjusted actual torque of the motor can be obtained. It is then determined whether the difference in motor torque is within a preset motor torque error range. If it is, the adjusted actual torque of the motor is determined to have reached the target torque; otherwise, the adjusted actual torque of the motor is determined to have not reached the target torque.

[0114] The preset motor torque error can be set according to actual needs.

[0115] This embodiment of the invention can end the motor torque adjustment process when the actual torque of the adjusted motor reaches the target torque of the motor.

[0116] In the event of a vehicle malfunction, this embodiment prohibits motor torque compensation to prevent the hybrid vehicle from experiencing a severely low State of Charge (SOC) and lack of power steering, or the battery motor from bearing excessive charging and discharging power under fault conditions, thereby ensuring the normal operation of the hybrid vehicle's high-voltage system.

[0117] Optional, based on Figure 2 The method shown is as follows: Figure 5 As shown in the schematic flowchart of another embodiment of the vehicle torque control method provided in this disclosure, before step S100, the method may further include:

[0118] S10, Obtain the accelerator pedal opening of the hybrid vehicle.

[0119] Specifically, in this embodiment of the present disclosure, the accelerator pedal signal is read through the CAN bus of the hybrid vehicle to obtain the accelerator pedal opening.

[0120] S20: Utilize the accelerator pedal opening to obtain the driving torque required by the hybrid vehicle.

[0121] Specifically, this embodiment of the present disclosure can obtain a parameter table for a hybrid vehicle, which can be generated through bench testing of the hybrid vehicle. This parameter table records the correspondence between accelerator pedal opening and required driving torque. Therefore, by using the accelerator pedal opening of the hybrid vehicle as a query condition to query the parameter table, the required driving torque can be obtained.

[0122] The embodiments disclosed herein can obtain accurate driving torque by adjusting the accelerator pedal opening, providing a reliable basis for subsequent torque control of the engine and motor, thereby improving vehicle torque and achieving precise torque control.

[0123] The vehicle torque control method provided in this disclosure can be applied to transient torque control scenarios in hybrid vehicles. These transient torque control scenarios may include gear shifting, mode switching, and vehicle start-up. This disclosure utilizes engine torque control logic with slow torque increase and rapid torque decrease, combined with the torque compensation advantages of the electric motor, to improve the vehicle's fuel economy while maintaining its driving dynamics. Furthermore, by differentiating the electric motor torque control process under normal and fault conditions, the normal operation of the vehicle's high-voltage system is ensured.

[0124] Although the operations are described in a specific order, this should not be construed as requiring these operations to be performed in the specific order shown or in a sequential order. In certain environments, multitasking and parallel processing may be advantageous.

[0125] It should be understood that the steps described in the method embodiments of this disclosure may be performed in different orders and / or in parallel. Furthermore, the method embodiments may include additional steps and / or omit the steps shown. The scope of this disclosure is not limited in this respect.

[0126] Corresponding to the above method embodiments, this disclosure also provides a vehicle torque control device, the structure of which is as follows: Figure 6 As shown, the device is applied to a hybrid vehicle, which includes an engine and an electric motor. The vehicle torque control device includes: a driving demand torque distribution unit 100, an actual torque acquisition unit 200, a vehicle fault determination unit 300, a first engine torque adjustment unit 400, an electric motor target torque correction unit 500, a first electric motor torque adjustment unit 600, and a first torque determination unit 700.

[0127] The driving demand torque distribution unit 100 is used to distribute the driving demand torque of the hybrid vehicle to obtain the target torque of the engine and the target torque of the electric motor.

[0128] The actual torque acquisition unit 200 is used to acquire the actual engine torque and the actual motor torque of the motor.

[0129] The vehicle fault determination unit 300 is used to determine whether the hybrid vehicle is in a fault state. If not, the first engine torque adjustment unit 400 is triggered.

[0130] The first engine torque adjustment unit 400 is used to perform a first torque adjustment on the actual engine torque based on the engine target torque. The first torque adjustment is to increase the actual engine torque according to a first step length, or to decrease the actual engine torque according to a second step length, wherein the first step length is less than the second step length.

[0131] The motor target torque correction unit 500 is used to correct the motor target torque using the driving demand torque and the adjusted actual engine torque.

[0132] The first motor torque adjustment unit 600 is used to perform a second torque adjustment on the actual motor torque based on the corrected target motor torque.

[0133] The first torque determination unit 700 is used to determine whether the adjusted actual engine torque reaches the engine target torque. If not, the first engine torque adjustment unit 400 is triggered to perform a first torque adjustment on the actual engine torque based on the engine target torque according to the adjusted actual engine torque.

[0134] Optionally, the vehicle torque control device may further include: a second engine torque adjustment unit and a second torque determination unit.

[0135] The second engine torque adjustment unit is used to adjust the actual engine torque based on the engine target torque when the hybrid vehicle is determined to be in a fault state. The third torque adjustment includes adjusting the actual engine torque by increasing torque according to a third step or adjusting the actual engine torque by decreasing torque according to a fourth step, wherein the third step is longer than the first step.

[0136] The second torque determination unit is used to determine whether the adjusted actual engine torque reaches the engine target torque. If not, the second engine torque adjustment unit is triggered to perform a third torque adjustment on the actual engine torque based on the engine target torque according to the adjusted actual engine torque.

[0137] Optionally, the first torque determination unit 700 or the second torque determination unit can be specifically used to obtain the engine torque difference between the engine target torque and the adjusted engine actual torque; determine whether the engine torque difference is within the preset engine torque error; if yes, determine that the adjusted engine actual torque has reached the engine target torque; if no, determine that the adjusted engine actual torque has not reached the engine target torque.

[0138] Optionally, the vehicle torque control device may further include: a second motor torque adjustment unit and a third torque determination unit.

[0139] The second motor torque adjustment unit is used to perform a fourth torque adjustment on the actual motor torque based on the motor target torque when the hybrid vehicle is determined to be in a fault state.

[0140] The third torque determination unit is used to determine whether the adjusted actual torque of the motor reaches the target torque of the motor. If not, the second motor torque adjustment unit is triggered to perform a fourth torque adjustment on the actual torque of the motor according to the adjusted actual torque of the motor and the target torque of the motor.

[0141] Optionally, the third torque determination unit can be specifically used to obtain the motor torque difference between the motor target torque and the adjusted motor actual torque; determine whether the motor torque difference is within the preset motor torque error; if so, determine that the adjusted motor actual torque has reached the motor target torque; if not, determine that the adjusted motor actual torque has not reached the motor target torque.

[0142] Optionally, fault conditions include the state of charge of the hybrid vehicle being lower than a preset charge threshold and vehicle component failure.

[0143] Optionally, the vehicle torque control device may also include: an accelerator pedal opening unit and a driving demand torque acquisition unit.

[0144] The accelerator pedal opening unit is used to obtain the accelerator pedal opening of the hybrid vehicle before the driving demand torque distribution unit 100 distributes the driving demand torque of the hybrid vehicle and obtains the target torque of the engine and the target torque of the electric motor.

[0145] The driving demand torque acquisition unit is used to obtain the driving demand torque of the hybrid vehicle by utilizing the accelerator pedal opening.

[0146] This disclosure provides a vehicle torque control device applied to a hybrid vehicle including an engine and an electric motor. The device distributes the driving torque demand of the hybrid vehicle into a target engine torque and a target electric motor torque. When the hybrid vehicle is in a non-faulty state, based on the target engine torque, the actual engine torque is adjusted by increasing torque in a first step or decreasing torque in a second step, where the first step is smaller than the second step. The actual electric motor torque is adjusted based on the target electric motor torque corrected using the driving torque demand and the adjusted actual engine torque, until the adjusted actual engine torque reaches the target engine torque. This disclosure, through a slow torque increase and rapid torque decrease engine torque control logic combined with the torque compensation advantage of the electric motor, can balance the vehicle economy and driving dynamics of the hybrid vehicle.

[0147] Regarding the apparatus in the above embodiments, the specific manner in which each unit performs its operation has been described in detail in the embodiments related to the method, and will not be elaborated upon here.

[0148] The vehicle torque control device includes a processor and a memory. The aforementioned driving demand torque distribution unit 100, actual torque acquisition unit 200, vehicle fault determination unit 300, first engine torque adjustment unit 400, motor target torque correction unit 500, first motor torque adjustment unit 600, and first torque determination unit 700 are all stored as program units in the memory. The processor executes the aforementioned program units stored in the memory to realize the corresponding functions.

[0149] The processor contains a kernel, which retrieves the corresponding program unit from memory. One or more kernels can be configured. By adjusting kernel parameters, the engine torque control logic—which involves slow torque increase and rapid torque decrease—combines the torque compensation advantages of the electric motor to balance the vehicle's economy and driving dynamics, and limits the electric motor's torque compensation in the event of a vehicle malfunction.

[0150] This disclosure provides a computer-readable storage medium having a program stored thereon that, when executed by a processor, implements the vehicle torque control method.

[0151] This disclosure provides a processor for running a program, wherein the program executes the vehicle torque control method during runtime.

[0152] like Figure 7 As shown, this disclosure provides an electronic device 1000, which includes at least one processor 1001, at least one memory 1002 connected to the processor 1001, and a bus 1003. The processor 1001 and memory 1002 communicate with each other via the bus 1003. The processor 1001 is used to call program instructions in the memory 1002 to execute the aforementioned vehicle torque control method. The electronic device described herein can be a server, PC, PAD, mobile phone, ECU (Electronic Control Unit), VCU (Vehicle Control Unit), MCU (Micro Controller Unit), HCU (Hybrid Control Unit), etc.

[0153] This disclosure provides a hybrid vehicle that uses the vehicle torque control method described above for vehicle torque control.

[0154] This disclosure also provides a computer program product that, when executed on an electronic device, is adapted to perform a program that initializes a vehicle torque control method step.

[0155] This disclosure is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus, electronic devices (systems), and computer program products according to embodiments of this disclosure. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable device to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable device, generate instructions for implementing the flowchart. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0156] In a typical configuration, an electronic device includes one or more processors (CPUs), memory, and a bus. The electronic device may also include input / output interfaces, network interfaces, etc.

[0157] Memory may include non-persistent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, like read-only memory (ROM) or flash RAM, and memory includes at least one memory chip. Memory is an example of computer-readable media.

[0158] Computer-readable media includes both permanent and non-permanent, removable and non-removable media that can store information using any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0159] In the description of this disclosure, it should be understood that if the terms "upper", "lower", "front", "rear", "left" and "right" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the position or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this disclosure.

[0160] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0161] Those skilled in the art will understand that embodiments of this disclosure can be provided as methods, systems, or computer program products. Therefore, this disclosure can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this disclosure can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0162] The above are merely embodiments of this disclosure and are not intended to limit the scope of this disclosure. Various modifications and variations can be made to this disclosure by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the scope of the claims of this disclosure.

Claims

1. A vehicle torque control method, characterized in that, Applied to a hybrid vehicle, the hybrid vehicle including an engine and an electric motor, the method includes: The driving torque demand of the hybrid vehicle is allocated to obtain the target torque of the engine and the target torque of the electric motor; Obtain the actual engine torque of the engine and the actual motor torque of the motor; Determine whether the hybrid vehicle is in a fault state. If not, perform a first torque adjustment on the actual engine torque based on the engine target torque. This first torque adjustment involves either increasing the actual engine torque by a first step length or decreasing it by a second step length, where the first step length is less than the second step length. Then, using the required driving torque and the adjusted actual engine torque, correct the electric motor target torque. Perform a second torque adjustment on the actual motor torque based on the corrected target torque. Determine whether the adjusted actual engine torque reaches the engine target torque. If not, return to the first torque adjustment step based on the engine target torque, until the adjusted actual engine torque reaches the engine target torque. If the hybrid vehicle is determined to be in a faulty state, a third torque adjustment is performed on the actual engine torque based on the engine target torque. This third torque adjustment includes either increasing the actual engine torque by a third step or decreasing it by a fourth step, where the third step is greater than the first step. It is then determined whether the adjusted actual engine torque reaches the engine target torque. If not, the process returns to the step of performing the third torque adjustment based on the engine target torque, continuing until the adjusted actual engine torque reaches the engine target torque. If the hybrid vehicle is determined to be in a faulty state, a fourth torque adjustment is performed on the actual torque of the motor based on the target torque of the motor; it is then determined whether the adjusted actual torque of the motor reaches the target torque of the motor. If not, the process returns to the step of performing the fourth torque adjustment on the actual torque of the motor based on the adjusted actual torque of the motor.

2. The method according to claim 1, characterized in that, The determination of whether the adjusted actual torque of the engine reaches the target torque of the engine includes: The engine torque difference between the target engine torque and the adjusted actual engine torque is obtained. Determine whether the engine torque difference is within the preset engine torque error. If it is, determine that the adjusted actual engine torque has reached the engine target torque. If not, determine that the adjusted actual engine torque has not reached the engine target torque.

3. The method according to claim 1, characterized in that, The determination of whether the actual torque of the motor after adjustment reaches the target torque of the motor includes: The motor torque difference between the target torque of the motor and the adjusted actual torque of the motor is obtained; Determine whether the motor torque difference is within the preset motor torque error. If yes, determine that the adjusted actual motor torque has reached the motor target torque. If no, determine that the adjusted actual motor torque has not reached the motor target torque.

4. The method according to claim 1, characterized in that, The fault states include the state of charge of the hybrid vehicle being lower than a preset charge threshold and vehicle component malfunctions.

5. The method according to claim 1, characterized in that, Before allocating the driving torque demand of the hybrid vehicle to obtain the target engine torque and the target electric motor torque, the method further includes: Obtain the accelerator pedal opening of the hybrid vehicle; The driving torque required by the hybrid vehicle is obtained by using the accelerator pedal opening.

6. A vehicle torque control device, characterized in that, The device is applied to hybrid vehicles, which include an engine and an electric motor. The device includes: a driving demand torque distribution unit, an actual torque acquisition unit, a vehicle fault determination unit, a first engine torque adjustment unit, a motor target torque correction unit, a first electric motor torque adjustment unit, a first torque determination unit, a second engine torque adjustment unit, a second torque determination unit, a second electric motor torque adjustment unit, and a third torque determination unit. The driving demand torque distribution unit is used to distribute the driving demand torque of the hybrid vehicle to obtain the target torque of the engine and the target torque of the electric motor. The actual torque acquisition unit is used to acquire the actual engine torque of the engine and the actual motor torque of the motor. The vehicle fault determination unit is used to determine whether the hybrid vehicle is in a fault state. If not, the first engine torque adjustment unit is triggered. The first engine torque adjustment unit is used to perform a first torque adjustment on the actual engine torque based on the engine target torque, wherein the first torque adjustment is to increase the actual engine torque according to a first step length, or to decrease the actual engine torque according to a second step length, wherein the first step length is less than the second step length. The motor target torque correction unit is used to correct the motor target torque using the driving demand torque and the adjusted actual engine torque; The first motor torque adjustment unit is used to perform a second torque adjustment on the actual torque of the motor based on the corrected target torque of the motor. The first torque determination unit is used to determine whether the adjusted actual engine torque reaches the engine target torque. If not, the first engine torque adjustment unit is triggered to perform a first torque adjustment on the actual engine torque based on the engine target torque according to the adjusted actual engine torque. The second engine torque adjustment unit is used to adjust the actual engine torque based on the engine target torque when the hybrid vehicle is determined to be in a fault state. The third torque adjustment includes adjusting the actual engine torque by increasing torque according to a third step or adjusting the actual engine torque by decreasing torque according to a fourth step, wherein the third step is greater than the first step. The second torque determination unit is used to determine whether the adjusted actual engine torque reaches the engine target torque. If not, the second engine torque adjustment unit performs a third torque adjustment on the actual engine torque based on the engine target torque according to the adjusted actual engine torque. The second motor torque adjustment unit is used to perform a fourth torque adjustment on the actual torque of the motor based on the target torque of the motor when it is determined that the hybrid vehicle is in a fault state. The third torque determination unit is used to determine whether the adjusted actual torque of the motor reaches the target torque of the motor. If not, the second motor torque adjustment unit is triggered to perform a fourth torque adjustment on the actual torque of the motor according to the adjusted actual torque of the motor and the target torque of the motor.

7. An electronic device, characterized in that, The electronic device includes at least one processor, at least one memory connected to the processor, and a bus; wherein the processor and the memory communicate with each other through the bus; the processor is used to call program instructions in the memory to execute the vehicle torque control method as described in any one of claims 1 to 5.

8. A hybrid vehicle, characterized in that, Vehicle torque control is performed using the vehicle torque control method as described in any one of claims 1 to 5.

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