CN113954842A

CN113954842A - Hybrid wheel end torque capacity determination method and device, electronic equipment and storage medium

Info

Publication number: CN113954842A
Application number: CN202111265202.5A
Authority: CN
Inventors: 伍庆龙; 于长虹
Original assignee: FAW Group Corp
Current assignee: FAW Group Corp
Priority date: 2021-10-28
Filing date: 2021-10-28
Publication date: 2022-01-21
Anticipated expiration: 2041-10-28
Also published as: CN113954842B; WO2023071619A1

Abstract

The embodiment of the invention discloses a method and a device for determining the torque capacity of a hybrid wheel end, electronic equipment and a storage medium. The method comprises the following steps: determining the motor power of the motor based on the battery power, the air conditioner power, the converter power, the reserved motor power and the motor efficiency; determining the initial torque capacity of a motor of the driving system based on the motor power of the motor, and determining the wheel end torque capacity of the motor of the driving system based on the initial torque capacity of the motor, the torque loss of a gearbox of the driving system and the wheel end transmission ratio of the driving system; the method comprises the steps of obtaining the net torque capacity of an engine in a driving system, determining the wheel end torque capacity of the engine of the driving system based on the net torque capacity and the torque loss of a gearbox, determining the mixed wheel end torque capacity of the driving system based on the wheel end torque capacity of a motor and the wheel end torque capacity of the engine, and effectively, truly and reliably calculating the torque capacity output to the wheel end by a mixed power system.

Description

Hybrid wheel end torque capacity determination method and device, electronic equipment and storage medium

Technical Field

The embodiment of the invention relates to the technical field of new energy automobiles, in particular to a method and a device for determining the torque capacity of a hybrid wheel end, electronic equipment and a storage medium.

Background

Because of its own advantages of good fuel-saving effect, low cost and the like, the hybrid electric vehicle is being popularized and developed by more and more automobile manufacturers, and the hybrid electric vehicle is mainly an automobile which obtains power from two power sources, namely an electric drive system and an engine drive system. The motor is powered by the battery, and the torque capacity of the engine is superposed, so that the driving output capacity of the whole vehicle can be ensured, the working area of the engine can be optimized, meanwhile, in the sliding and braking stages, the hybrid power system can carry out effective energy recovery, the oil consumption and the emission are finally reduced, and the aims of saving energy and reducing emission of the whole vehicle are fulfilled.

The charge-discharge torque capacity of the hybrid power system is an important factor influencing the power driving and energy recovery of the whole vehicle, and if the torque capacity of the hybrid power system cannot be accurately calculated, the driving torque demand and the energy recovery torque of the whole vehicle cannot be accurately and reliably obtained, so that how to provide a reliable and accurate hybrid power torque capacity calculation method is necessary.

Disclosure of Invention

The invention provides a method and a device for determining the torque capacity of a hybrid wheel end, electronic equipment and a storage medium, which are used for effectively, truly and reliably calculating the torque capacity output to the wheel end by a hybrid power system.

In a first aspect, an embodiment of the present invention provides a hybrid wheel end torque capacity determination method, including:

the method comprises the steps of obtaining battery power of a battery in a driving system, air conditioner power of an air conditioner, converter power of a converter and motor reserved power of a motor, and determining the motor power of the motor based on the battery power, the air conditioner power, the converter power, the motor reserved power and the motor efficiency;

determining a motor initial torque capacity of the drive system based on the motor power of the motor, and determining a motor wheel end torque capacity of the drive system based on the motor initial torque capacity, a motor torque loss, a gearbox torque loss of the drive system, and a wheel end transmission ratio of the drive system;

the method comprises the steps of obtaining the net torque capacity of an engine in the driving system, determining the wheel end torque capacity of the engine of the driving system based on the net torque capacity and the torque loss of the gearbox, and determining the mixed wheel end torque capacity of the driving system based on the wheel end torque capacity of the motor and the wheel end torque capacity of the engine.

Optionally, if the motor power includes a maximum continuous charging power of the motor;

correspondingly, the determining the motor power of the motor based on the battery power, the air conditioner power, the converter power, and the reserved power and the motor efficiency of the motor in the driving system includes:

determining the maximum continuous charging power of the motor based on the product of the continuous charging power of the battery in the battery power and a continuous charging power temperature correction coefficient, the air conditioner power, the converter power, the maximum continuous charging reserved power of the motor in the reserved power of the motor and the motor efficiency;

if the motor power comprises the maximum peak charging power of the motor;

correspondingly, the determining the motor power of the motor based on the battery power, the air conditioner power, the converter power, the motor reserve power and the motor efficiency includes:

determining a maximum peak charging power of a motor of the motor based on a product of a peak charging power of the battery and a peak charging power temperature correction coefficient in the battery power, the air conditioner power, the converter power, a maximum peak charging reserve power of the motor in the reserve power of the motor, and a motor efficiency;

if the motor power comprises the maximum continuous discharge power of the motor;

determining a motor maximum continuous discharge power of the motor based on a product of a battery continuous discharge power and a continuous discharge power temperature correction coefficient in the battery power, the air conditioner power, the converter power, a motor maximum continuous discharge reserve power in the motor reserve power, and a motor efficiency;

if the motor power comprises the maximum peak discharge power of the motor;

and determining the maximum peak discharge power of the motor based on the product of the battery peak discharge power and the peak discharge power temperature correction coefficient in the battery power, the air conditioner power, the converter power, the maximum peak discharge reserve power of the motor in the reserve power of the motor and the motor efficiency.

Optionally, the determining the motor initial torque capacity of the motor based on the motor power of the motor includes:

determining an initial torque capacity of the motor based on a ratio of motor power to motor speed of the motor;

acquiring the maximum torque capacity of a motor body corrected by the temperature of the motor body, the maximum torque capacity of an IGBT corrected by the temperature of the IGBT of the motor and the maximum torque capacity of the voltage of a motor bus after the voltage of the motor bus is corrected, and determining the maximum allowable torque capacity of the motor based on the numerical comparison result of the maximum torque capacity of the motor body, the maximum torque capacity of the IGBT of the motor and the maximum torque capacity of the voltage of the motor bus;

determining a motor initial torque capacity of the drive system based on a numerical comparison of the motor maximum allowable torque capacity, the initial torque capacity, and a driveline torque capacity of the motor.

Optionally, if the torque capacity of the wheel end of the motor includes the minimum continuous torque capacity of the wheel end of the motor;

correspondingly, the determining the motor wheel end torque capacity of the driving system based on the motor initial torque capacity, the motor torque loss, the transmission torque loss of the driving system and the wheel end transmission ratio value of the driving system comprises:

determining a motor wheel end minimum continuous torque capacity of the drive system based on a motor initial minimum continuous torque capacity, a motor torque loss, a gearbox torque loss of the drive system and a wheel end transmission ratio value of the drive system in the motor initial torque capacities;

if the torque capacity of the wheel end of the motor comprises the minimum peak torque capacity of the wheel end of the motor;

determining a motor wheel end minimum peak torque capacity of the drive system based on a motor initial minimum peak torque capacity, a motor torque loss, a gearbox torque loss of the drive system, and a wheel end transmission ratio of the drive system in the motor initial torque capacities;

if the torque capacity of the wheel end of the motor comprises the maximum continuous torque capacity of the wheel end of the motor;

determining a motor wheel end maximum continuous torque capacity of the drive system based on a motor initial maximum continuous torque capacity, a motor torque loss, a gearbox torque loss of the drive system and a wheel end transmission ratio of the drive system in the motor initial torque capacities;

if the torque capacity of the wheel end of the motor comprises the maximum peak torque capacity of the wheel end of the motor;

determining a motor wheel end maximum peak torque capacity of the drive system based on a motor initial maximum peak torque capacity, a motor torque loss, a gearbox torque loss of the drive system, and a wheel end transmission ratio of the drive system in the motor initial torque capacities.

Optionally, the obtaining a net engine torque capacity of an engine in the drive system and determining an engine wheel end torque capacity of the drive system based on the net torque capacity, the transmission torque loss and the transmission torque loss includes:

obtaining an engine torque capacity and an engine friction torque capacity of the engine, and determining an engine net torque capacity of the engine based on the engine torque capacity and the engine friction torque capacity;

if the engine wheel end torque capacity comprises an engine minimum wheel end torque capacity;

accordingly, the determining an engine wheel end torque capacity of the drive system based on the net torque capacity, the transmission torque loss, and the transmission torque loss includes:

determining an engine minimum wheel end torque capacity of the drive system based on the engine minimum torque capacity of the net engine torque capacity, the transmission torque loss, and the wheel end gear ratio value;

if the engine wheel end torque capacity comprises the maximum wheel end torque capacity of the engine;

determining an engine maximum wheel end torque capacity of the drive system based on the engine maximum torque capacity of the net engine torque capacity, the transmission torque loss, and the wheel end gear ratio value.

Optionally, if the hybrid wheel end torque capacity comprises a hybrid wheel end minimum continuous torque capacity;

accordingly, determining a hybrid wheel end torque capability of the drive system based on the motor wheel end torque capability, the engine wheel end torque capability, the transmission torque loss, and the wheel end drive ratio value comprises:

determining a hybrid wheel end minimum creep torque capability of the drive system based on an engine minimum torque capability of the engine net torque capabilities and an electric machine initial minimum creep torque capability of the electric machine initial torque capabilities;

if the hybrid wheel end torque capacity comprises a hybrid wheel end minimum peak torque capacity;

determining a hybrid wheel end minimum peak torque capability of the drive system based on an engine minimum torque capability of the net engine torque capabilities and a motor initial minimum peak torque capability of the motor initial torque capabilities;

if the hybrid wheel end torque capacity comprises a hybrid wheel end maximum sustained torque capacity;

determining a hybrid wheel end maximum creep torque capability of the drive system based on an engine maximum torque capability of the net engine torque capabilities and an electric machine initial maximum creep torque capability of the electric machine initial torque capabilities;

if the hybrid wheel end torque capacity comprises a hybrid wheel end maximum peak torque capacity;

determining a hybrid wheel end peak maximum torque capability of the drive system based on an engine peak maximum torque capability of the net engine torque capabilities and an electric machine initial peak maximum torque capability of the electric machine initial torque capabilities.

Optionally, after determining the hybrid wheel end torque capacity of the drive system, the method further includes:

the method comprises the steps of obtaining the running condition of a current vehicle, and determining the required torque capacity corresponding to the running condition based on the running condition and the torque capacity of the hybrid wheel end.

In a second aspect, embodiments of the present invention also provide a hybrid wheel end torque capacity determination apparatus, comprising:

the motor power determination module is used for acquiring battery power of a battery in a driving system, air conditioner power of an air conditioner, converter power of a converter and motor reserved power of a motor, and determining the motor power of the motor based on the battery power, the air conditioner power, the converter power, the motor reserved power and motor efficiency;

the motor wheel end torque capacity determining module is used for determining the motor initial torque capacity of the driving system based on the motor power of the motor and determining the motor wheel end torque capacity of the driving system based on the motor initial torque capacity, the motor torque loss, the gearbox torque loss of the driving system and the wheel end transmission ratio of the driving system;

the hybrid wheel end torque capacity determination module is used for acquiring the net torque capacity of an engine in the driving system, determining the wheel end torque capacity of the engine of the driving system based on the net torque capacity and the torque loss of the gearbox, and determining the hybrid wheel end torque capacity of the driving system based on the wheel end torque capacity of the motor and the wheel end torque capacity of the engine.

In a third aspect, an embodiment of the present invention further provides an electronic device, where the electronic device includes:

one or more processors;

a storage device for storing one or more programs,

when executed by the one or more processors, cause the one or more processors to implement a hybrid wheel end torque capability determination method as provided by any of the embodiments of the invention.

In a fourth aspect, embodiments of the present invention also provide a computer-readable storage medium, on which a computer program is stored, which, when executed by a processor, implements the hybrid wheel end torque capacity determination method provided by any of the embodiments of the present invention.

According to the technical scheme of the embodiment of the invention, the battery power of a battery in a driving system, the air conditioner power of an air conditioner, the converter power of a converter and the motor reserved power of a motor are obtained, and the motor power of the motor is determined based on the battery power, the air conditioner power, the converter power, the motor reserved power and the motor efficiency; more accurate motor power is determined based on the working power of various modules in the driving system; further determining the initial torque capacity of the motor of the driving system based on the motor power of the motor, and determining the wheel end torque capacity of the motor of the driving system based on the initial torque capacity of the motor, the torque loss of a gearbox of the driving system and the wheel end transmission ratio of the driving system; based on the torque loss and the rated output torque of the driving motor, the output torque of the driving system motor at the wheel end determined by the driving motor is effectively calculated, so that the reliability and the accuracy of the torque capacity of the motor in the driving system are improved; the engine net torque capacity of an engine in the driving system is obtained in the next step, the engine wheel end torque capacity of the driving system is determined based on the net torque capacity and the gearbox torque loss, and therefore the hybrid wheel end torque capacity of the driving system is determined based on the motor wheel end torque capacity and the engine wheel end torque capacity; the wheel end torque capacity of the engine is determined based on the torque capacity of the engine, so that the reliability and the accuracy of the engine torque capacity in the hybrid drive system are improved; and determining the torque capacity of the hybrid wheel end of the driving system based on the torque capacity of the motor and the torque capacity of the engine, so that the reliability and the accuracy of the torque capacity of the hybrid wheel end output by the driving system are further improved.

Drawings

In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, a brief description is given below of the drawings used in describing the embodiments. It should be clear that the described figures are only views of some of the embodiments of the invention to be described, not all, and that for a person skilled in the art, other figures can be derived from these figures without inventive effort.

FIG. 1 is a schematic flow chart diagram of a hybrid wheel end torque capacity determination method provided in accordance with an embodiment of the present invention;

FIG. 2 is a schematic flow chart diagram of a hybrid wheel end torque capacity determination method provided by a second embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a hybrid wheel end torque capacity determining apparatus provided in accordance with a third embodiment of the present invention;

fig. 4 is a schematic structural diagram of an electronic device according to a fourth embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

Example one

Fig. 1 is a flowchart of a hybrid wheel end torque capacity determination method according to an embodiment of the present invention, which is applicable to a case of determining a hybrid wheel end torque capacity, and is more applicable to a case of determining a motor wheel end torque capacity based on a motor torque loss, and determining a hybrid wheel end torque capacity based on the motor wheel end torque capacity and an engine wheel end torque capacity. The method may be performed by a hybrid wheel end torque capacity determination device, which may be implemented in software and/or hardware.

Before describing the technical solution of the present embodiment, an application scenario of the technical solution of the present embodiment is described in an exemplary manner. Specifically, the application scenarios include:

the hybrid electric vehicle is mainly an automobile which obtains power from two power sources of an electric drive system and an engine drive system, the motor is powered by a battery, and the torque capacity of the engine is superposed, so that the driving output capacity of the whole vehicle can be ensured, the working area of the engine can be optimized, meanwhile, in the sliding and braking stages, the hybrid electric system can carry out effective energy recovery, the oil consumption and the emission are finally reduced, and the aims of saving energy and reducing emission of the whole vehicle are fulfilled.

However, in the prior art, the process of calculating the torque capacity of the motor drive system mainly considers the maximum torque output calculated from the two aspects of the motor and the battery, the power consumption of the DCDC and the consumption of the air conditioner are not considered, or the maximum output torque of the motor is obtained by comparing the motor capacity and the torque capacity of the transmission system, or the total vehicle required torque of the vehicle is calculated according to the current working condition of the vehicle, the accelerator pedal required torque, the brake pedal required torque, the creep torque, the required torque and the brake limiting coefficient, but no description is given to whether the drive motor can meet the required torque, that is, the calculation range of the torque capacity of the drive motor is not involved, and the torque capacity of the wheel end is not considered in the process of calculating the power torque capacity. Therefore, in the actual vehicle operation process, the torque that can be output by the hybrid drive system is different from the rated output torque, and a more efficient, reliable and accurate method for calculating the power torque capacity of the hybrid drive system is needed.

Based on the above technical problems, a technical idea of an embodiment of the present invention is to provide a method for calculating a power torque capability of a hybrid drive system, which fully considers power output conditions of various assemblies such as a driving motor, a power battery pack, a DCDC (direct current converter), an air conditioner, and an engine according to a P2 configuration characteristic of hybrid drive, and can more effectively calculate a continuous torque capability and a peak torque capability of the power system, thereby providing a true and reliable torque value for vehicle driving and energy recovery.

Based on the technical thought, the technical scheme of the embodiment of the invention determines the motor power of the motor by acquiring the battery power of the battery in the driving system, the air conditioner power of the air conditioner, the converter power of the converter and the motor reserved power of the motor and based on the battery power, the air conditioner power, the converter power, the motor reserved power and the motor efficiency; more accurate motor power is determined based on the working power of various modules in the driving system; further determining the initial torque capacity of the motor of the driving system based on the motor power of the motor, and determining the wheel end torque capacity of the motor of the driving system based on the initial torque capacity of the motor, the torque loss of a gearbox of the driving system and the wheel end transmission ratio of the driving system; based on the torque loss and the rated output torque of the driving motor, the output torque of the driving system motor at the wheel end determined by the driving motor is effectively calculated, so that the reliability and the accuracy of the torque capacity of the motor in the driving system are improved; the engine net torque capacity of an engine in the driving system is obtained in the next step, the engine wheel end torque capacity of the driving system is determined based on the net torque capacity and the gearbox torque loss, and therefore the hybrid wheel end torque capacity of the driving system is determined based on the motor wheel end torque capacity and the engine wheel end torque capacity; the wheel end torque capacity of the engine is determined based on the torque capacity of the engine, so that the reliability and the accuracy of the engine torque capacity in the hybrid drive system are improved; and determining the torque capacity of the hybrid wheel end of the driving system based on the torque capacity of the motor and the torque capacity of the engine, so that the reliability and the accuracy of the torque capacity of the hybrid wheel end output by the driving system are further improved.

As shown in fig. 1, the technical solution of this embodiment specifically includes the following steps:

s110, acquiring battery power of a battery in a driving system, air conditioner power of an air conditioner, converter power of a converter and motor reserved power of a motor, and determining the motor power of the motor based on the battery power, the air conditioner power, the converter power, the motor reserved power and the motor efficiency.

In an embodiment of the invention, the battery is a power battery pack for powering the motor. Specifically, the battery may be a high voltage battery located within the drive system, and the battery power may be the power generated by the battery as calculated by the battery management system. The air conditioner may be an air conditioning module of a current hybrid vehicle, and the air conditioning power may be power consumed by the air conditioner in use, which is calculated by an air conditioning management system. The converter may be a DCDC (Direct Current) converter, and the converter power may be the power generated by the input voltage and the input Current of the converter. The reserved power of the motor can be a reserved value preset for preventing the motor from exceeding the rated power so that the motor can be normally used.

In the present embodiment, the battery power of the battery includes a battery continuous charging power, a battery peak charging power, a battery continuous discharging power, and a battery peak discharging power. In this embodiment, before obtaining the battery power, the method further includes: the battery management system judges the limiting signal state of the battery and outputs the battery power of the battery according to the limiting signal state of the battery. Optionally, for example, the battery continuous charging power and the battery peak discharging power in the battery power are obtained, the battery management system determines a state of a charging limiting signal of the battery, and determines the battery continuous charging power and the battery peak charging power of the battery according to the state of the charging limiting signal.

Specifically, when the battery charging limiting signal state is a trigger state, the battery continuous charging power value is 0; when the State of the battery charging limiting signal is an unfired State and the SOC (State of Charge) is less than a, the battery continuous charging power is normally output; when the SOC is larger than b when the battery charging limiting signal is not triggered, the battery continuous charging power is 0. Where a and b are preset values, a < b, for example, a is 91% and b is 93%.

Specifically, when the battery charging limiting signal state is a trigger state, the battery peak charging power output value is 0; when the state of the battery charging limiting signal is an un-triggered state and the SOC is less than c, normally outputting the peak charging power of the battery; when the state of the battery charging limiting signal is an unfired state and the SOC is larger than d, the battery peak charging power output value is 0. Where a, b, c, d are preset values, a < b < c < d, e.g., c is 94%, d is 96%.

Optionally, the method for determining battery power by taking the battery continuous discharge power and the battery peak discharge power in the battery power as an example specifically includes: the battery management system judges the state of the discharge limiting signal of the battery and determines the battery continuous discharge power and the battery peak discharge power of the battery according to the state of the discharge limiting signal.

Specifically, when the battery discharge limiting signal state is a trigger state, the battery continuous discharge power value is 0; when the battery discharge limiting signal state is an unfired state and the SOC is less than e, the battery continuous discharge power output value is 0; and when the battery discharge limiting signal state is an unfired state and the SOC is more than f, normally outputting the continuous discharge power of the battery. Where e and f are preset values, e < f, e is 18% and f is 20%, for example.

Specifically, when the battery discharge limiting signal state is a trigger state, the battery peak discharge power output value is 0; when the battery discharge limiting signal state is an unfired state and the SOC is less than g, the battery peak discharge power output value is 0; and when the battery discharge limiting signal state is an unfired state and the SOC is greater than h, normally outputting the battery peak discharge power. Wherein e, f, g and h are preset values, g < h < e < f, such as g being 13% and h being 15%.

Further, the converter power of the converter in the present embodiment may be determined based on the converter management system, or the DCDC high-voltage side electric power may be calculated based on the voltage and current of the input of the converter; specifically, the calculation expression may be:

P_DC＝V_DC×I_DC

wherein P _ DC represents the converter power; v _ DC represents the voltage of the input of the converter; i _ DC represents the current at the input of the converter.

Further, the air conditioner power of the air conditioner in this embodiment may be determined based on the air conditioner management system, or may be calculated based on the voltage and the current of the air conditioner.

Further, in order to ensure the capability of each component, the reserved power of the motor is preset in the embodiment.

Further, the motor efficiency in this embodiment may be obtained by searching a motor efficiency MAP, and the motor efficiency value is output, and the power output is ensured to be between the maximum efficiency and the minimum efficiency of the motor.

Specifically, after battery power of a battery in a driving system, air conditioner power of an air conditioner, converter power of a converter and motor reserve power of a motor are acquired, motor power of the motor is determined based on the battery power, the air conditioner power, the converter power, the motor reserve power and motor efficiency.

The motor power in this embodiment includes a motor maximum continuous charging power, a motor maximum peak charging power, a maximum continuous discharging power, and a motor maximum peak discharging power.

If the motor power comprises the maximum continuous charging power of the motor; correspondingly, determining the motor power of the motor based on the battery power, the air conditioner power, the converter power and the motor reserve power of the motor, and based on the battery power, the air conditioner power, the converter power, the motor reserve power and the motor efficiency, includes: and determining the maximum continuous charging power of the motor based on the product of the continuous charging power of the battery and the temperature correction coefficient of the continuous charging power in the battery power, the air conditioner power, the converter power, the maximum continuous charging reserved power of the motor in the reserved power of the motor and the motor efficiency.

For example, the maximum continuous charging power of the electric machine is determined based on the following formula:

P_mMaxCtChrg＝(P_ChrgCt×Q_ChrgCt+P_AC+P_DC-P_MCtCPRed)×E_m；

wherein P _ mMaxCtChrg denotes a maximum continuous charging power of the motor; p _ ChrgCt represents battery continuous charging power in battery power; q _ ChrgCt represents a continuous charging power temperature correction coefficient; p _ AC represents air conditioner power; p _ DC represents the converter power; p _ MCtCPRed represents the maximum continuous charging reserved power of the motor; e _ m represents the motor efficiency.

Specifically, if the motor power includes the maximum peak charging power of the motor; correspondingly, determining the motor power of the motor based on the battery power, the air conditioner power, the converter power, the reserved motor power and the motor efficiency comprises: and determining the maximum peak charging power of the motor based on the product of the battery peak charging power and the peak charging power temperature correction coefficient in the battery power, the air conditioner power, the converter power, the maximum peak charging reserved power of the motor in the reserved power of the motor and the motor efficiency.

For example, the maximum peak motor charging power for the motor is determined based on the following equation: p _ mMaxPkChrg ═ (P _ ChrgPk × Q _ ChrgPk + P _ AC + P _ DC-P _ mpkcred) × E _ m;

wherein P _ mMaxPkChrg represents a maximum peak charging power of the motor; p _ ChrgPk represents a battery peak charging power among the battery powers; q _ ChrgPk represents a peak charging power temperature correction coefficient; p _ AC represents air conditioner power; p _ DC represents the converter power; p _ MPkCPRed represents the maximum peak value charging reserved power of the motor; e _ m represents the motor efficiency.

Specifically, if the motor power includes the maximum sustained discharge power of the motor; correspondingly, determining the motor power of the motor based on the battery power, the air conditioner power, the converter power, the reserved motor power and the motor efficiency comprises:

and determining the maximum continuous discharge power of the motor based on the product of the battery continuous discharge power and the temperature correction coefficient of the continuous discharge power in the battery power, the air conditioner power, the converter power, the maximum continuous discharge reserved power of the motor in the reserved power of the motor and the motor efficiency.

For example, the maximum sustained discharge power of the motor is determined based on the following formula:

P_mMaxCtDisrg＝(P_DisrgCt×Q_DisrgCt-P_AC-P_DC-P_MCtDPRed)×E_m；

wherein, P _ mMaxCtDisrg represents the maximum continuous discharge power of the motor; p _ distrgct represents a battery continuous discharge power in the battery power; q _ DisrgCt represents a continuous discharge power temperature correction coefficient; p _ AC represents air conditioner power; p _ DC represents the converter power; p _ MCtDPRed represents the maximum sustained discharge reserved power of the motor; e _ m represents the motor efficiency.

Specifically, if the motor power includes the maximum peak discharge power of the motor; correspondingly, determining the motor power of the motor based on the battery power, the air conditioner power, the converter power, the reserved motor power and the motor efficiency comprises:

and determining the maximum peak discharge power of the motor based on the product of the battery peak discharge power and the peak discharge power temperature correction coefficient in the battery power, the air conditioner power, the converter power, the maximum peak discharge reserve power of the motor in the motor reserve power and the motor efficiency.

For example, the maximum peak motor discharge power of the motor is determined based on the following equation:

P_mMaxPkDisrg＝(P_DisrgPk×Q_DisrgPk-P_AC-P_DC-P_MPkDPRed)×E_m；

wherein, P _ mMaxPkDisrg represents the maximum peak discharge power of the motor; p _ distrgpk represents a battery peak discharge power among the battery powers; q _ DisrgPk represents a peak discharge power temperature correction coefficient; p _ AC represents air conditioner power; p _ DC represents the converter power; p _ MPkDPRed represents the maximum peak discharge reserved power of the motor; e _ m represents the motor efficiency.

It should be noted that the reserved power of each motor is a preset value, and the power temperature correction coefficient of each motor can be obtained by searching the current battery temperature MAP.

And S120, determining the initial torque capacity of the motor of the driving system based on the motor power of the motor, and determining the wheel end torque capacity of the motor of the driving system based on the initial torque capacity of the motor, the torque loss of a gearbox of the driving system and the wheel end transmission ratio of the driving system.

In the present embodiment, the motor initial torque capacity of the drive system may refer to the motor torque capacity before being transmitted to the wheel end, in other words, may be interpreted as the motor torque capacity determined based on the motor rated torque capacity in the drive system. Specifically, the method for determining the initial torque capacity of the motor of the drive system may be to determine the initial torque capacity of the motor based on the motor speed and the motor power of the motor, and determine the initial torque capacity of the motor of the drive system based on the initial torque capacity. The initial torque capacity of the motor refers to a rated torque capacity of the motor, namely, the rated torque capacity of the motor determined based on a ratio of motor power and motor speed. It should be noted that, in the technical scheme of this embodiment, the rotation speed of the motor is filtered before the rated motor torque is determined, so that the output is performed between the maximum rotation speed and the minimum rotation speed of the motor after the rotation speed of the motor is determined, thereby ensuring the normal operation of the motor.

Specifically, optionally, after determining the initial torque of the motor, or before determining the initial torque capacity of the motor of the drive system based on the initial torque capacity, determining the maximum allowable torque capacity of the motor, and determining the initial torque capacity of the motor of the drive system based on the numerical comparison result of the drive train torque capacity of the motor, the external characteristic maximum torque capacity of the motor, the maximum allowable torque capacity of the motor, and the initial torque capacity.

Specifically, the method for determining the maximum allowable torque capacity of the motor may be: the method comprises the steps of obtaining the motor external characteristic maximum torque capacity of a motor, and respectively determining the motor body maximum torque capacity corrected by the motor body temperature, the motor IGBT maximum torque capacity corrected by the motor IGBT temperature and the motor bus voltage maximum torque capacity corrected by the motor bus voltage based on the motor external characteristic maximum torque capacity.

Specifically, the maximum torque capacity of the motor body for temperature correction of the motor body is determined based on the product of the maximum torque of the external characteristic of the motor and the temperature correction coefficient of the motor; determining the IGBT maximum torque capacity of the motor for correcting the IGBT temperature based on the product of the motor external characteristic maximum torque and the IGBT temperature correction coefficient; and determining the maximum torque capacity of the motor bus voltage after the motor bus voltage is corrected based on the product of the maximum torque of the external characteristic of the motor and the motor bus voltage correction coefficient. And determining the maximum allowable torque capacity of the motor through a numerical comparison result based on the maximum torque capacity of the motor body, the maximum torque capacity of the motor IGBT and the maximum torque capacity of the motor bus voltage. For example, the torque capacity with the smallest value among the maximum torque capacity of the motor body, the maximum torque capacity of the motor IGBT and the maximum torque capacity of the motor bus voltage may be determined as the maximum allowable torque capacity T _ mmaxavir of the motor.

In this embodiment, the motor initial torque capabilities of the drive system include a motor initial maximum sustained torque capability, a motor initial maximum peak torque capability, a motor initial minimum sustained torque capability, and a motor initial minimum peak torque capability.

Specifically, the method for determining the initial minimum sustainable torque capacity of the motor in the initial torque capacities of the motors may include:

an initial maximum continuous charging torque capability, T _ mCtChrg, of the electric machine is determined based on a ratio of the maximum continuous charging power of the electric machine to the rotational speed of the electric machine. Specifically, the expression may be:

T_mCtChrg＝|P_mMaxCtChrg×9549/n_m|

wherein an initial maximum continuous charging torque capability of the T _ mCTCHrg motor; p _ mMaxCtChrg denotes a maximum continuous charging power of the motor; 9549/n _ m represents the filtered motor speed.

Further, during the electric drive running, the transmission input shaft limit value T _ transfavil of the drive system is determined based on the search result of the MAP.

Specifically, an electric machine initial minimum sustainable torque capacity, T _ mMinCtChrg, is determined based on an initial maximum sustainable charge torque capacity, T _ mCTChrg, an electric machine maximum allowable torque capacity, T _ mMaxAvil, and a transmission input shaft limit, T _ TransAvil. Specifically, the 3 torque capacities may be minimum and then subjected to a negative operation to serve as the initial minimum sustained torque capacity T _ mMinCtChrg of the motor.

For example, the motor initial minimum sustained torque capacity T _ mMinCtChrg may be determined based on the following expression:

T_mMinCtChrg＝-Min(T_mCtChrg,T_mMaxAvil,T_TransAvil)；

specifically, the method for determining the initial minimum peak torque capacity of the motor in the initial torque capacities of the motor may include:

an initial maximum peak charge torque capacity, T _ mPkChrg, of the electric machine is determined based on a ratio of the maximum peak charge power of the electric machine to the rotational speed of the electric machine. Specifically, the expression may be:

T_mPkChrg＝|P_mMaxPkChrg×9549/n_m|

wherein an initial maximum peak charge torque capability of the T _ mPkChrg motor; p _ mMaxPkChrg represents the maximum peak charging power of the motor; 9549/n _ m represents the filtered motor speed.

Specifically, an initial minimum peak torque capacity of the motor, T _ mMinPkChrg, is determined based on the initial maximum peak charging torque capacity, T _ mPkChrg, the maximum allowable torque capacity of the motor, T _ mmaxavir, and the transmission input shaft limit, T _ transcavil. Specifically, the 3 torque capacities may be set to the minimum value and then subjected to a negative operation to be used as the initial minimum peak torque capacity T _ mminpkcchrg of the motor.

For example, the motor initial minimum peak torque capability T _ mminpkcchrg may be determined based on the following expression:

T_mMinPkChrg＝-Min(T_mPkChrg,T_mMaxAvil,T_TransAvil)；

specifically, the method for determining the initial maximum sustainable torque capacity of the motor in the initial torque capacity of the motor may include:

an initial maximum sustained discharge torque capability, T _ mCtDisrg, of the motor is determined based on a ratio of the motor maximum sustained discharge power to the motor speed. Specifically, the expression may be:

T_mCtDisrg＝P_mMaxCtDisrg×9549/n_m

wherein an initial maximum sustained discharge torque capability of the T _ mCTDisrg motor; p _ mmaxctdistrg represents the maximum sustained discharge power of the motor; 9549/n _ m represents the filtered motor speed.

Specifically, an initial maximum sustainable torque capacity of the electric machine, T _ mMaxClarge, is determined based on the initial maximum sustainable discharge torque capacity, T _ mCitDisrg, the maximum allowable torque capacity of the electric machine, T _ mMaxAvil, and a transmission input shaft limit, T _ TransAvil. Specifically, the above-mentioned 3 torque capacities may be taken as the minimum value as the initial maximum sustained torque capacity T _ mmaxctdistrg of the motor.

For example, the motor initial maximum sustained torque capacity T _ mmaxctdistrg may be determined based on the following expression:

T_mMaxCtDisrg＝Min(T_mCtDisrg,T_mMaxAvil,T_TransAvil)

specifically, the method for determining the initial maximum peak torque capacity of the motor in the initial torque capacity of the motor may include:

an initial maximum peak discharge torque capability, T _ mPkDischrg, of the motor is determined based on a ratio of the motor maximum peak discharge power to the motor speed. Specifically, the expression may be:

T_mPkDischrg＝P_mMaxPkDisrg×9549/n_m

wherein an initial maximum peak discharge torque capability of the T _ mPkDischrg motor; p _ mMaxPkDisrg represents the maximum peak discharge power of the motor; 9549/n _ m represents the filtered motor speed.

Specifically, an initial peak maximum torque capacity of the electric machine, T _ mMaxPridDisrg, is determined based upon the initial peak discharge torque capacity, T _ mMaxAvil, the maximum allowable torque capacity of the electric machine, T _ mMaxAvil, and the transmission input shaft limit, T _ TransAvil. Specifically, the minimum value of the 3 torque capacities may be set as the initial maximum peak torque capacity T _ mmaxpkdist of the motor.

For example, the motor initial maximum peak torque capacity T _ mmaxpkdist may be determined based on the following expression:

T_mMaxPkDisrg＝Min(T_mPkDisrg,T_mMaxAvil,T_TransAvil)

further, the motor wheel end torque capacity of the drive system is determined based on the motor initial torque capacity, the motor torque loss, the transmission torque loss of the drive system and the wheel end transmission ratio of the drive system.

In the embodiment of the invention, after the initial torque capacity of the motor of the driving system is obtained, the motor loss torque of the motor is determined, and the motor wheel end torque capacity of the driving system is determined according to the initial torque capacity of the motor, the motor torque loss, the gearbox torque loss of the driving system and the wheel end transmission ratio of the driving system.

Alternatively, the method of determining a torque loss of the electric machine may comprise: determining the maximum allowable motor power of the motor based on the product of the maximum allowable motor torque capacity and the motor rotating speed of the motor, and determining the first motor loss power of the motor based on the difference value of the maximum allowable motor power and the maximum peak discharge power of the motor; acquiring motor electric power and motor mechanical power of the motor, and determining second motor loss power of the motor based on a difference value of the motor electric power and the motor mechanical power; determining the motor loss power of the motor based on the numerical comparison result of the first motor loss power and the second motor loss power; and determining the motor torque loss of the motor based on the ratio of the motor loss power and the motor speed.

Optionally, determining the maximum allowable motor power of the motor based on the product of the maximum allowable motor torque capacity and the motor rotation speed of the motor; for example, the following equation may be used to determine the first motor power loss for the motor:

P_mLoss1＝(T_mMaxAvil×n_m/9549)-P_mMaxPkDisrg

wherein P _ mLoss1 represents the first motor power loss; t _ mMaxAvil represents the maximum allowable torque capacity of the motor; p _ mmaxpkdistg represents the maximum peak discharge power of the motor.

Specifically, the method for obtaining the electric power of the motor can comprise the following steps: calculating motor electric power based on the battery discharge capacity, the DCDC and the air conditioner power consumption; for example, the electric power of the motor may be determined based on the following formula:

P_mEle＝V_Bat×(I_Bat-I_DC)-P_AC

p _ mEle represents the motor electric power; v _ Bat represents the battery voltage; i _ Bat-represents the battery current; i _ DC represents the DCDC converter input current; p _ AC represents air-conditioning electric power.

Specifically, the method for obtaining the mechanical power of the motor may include: calculating the mechanical power of the motor according to the torque and the rotating speed of the motor; for example, the mechanical power of the motor may be determined based on the following formula:

P_mMec＝T_m×n_m/9549

wherein P _ mMec represents the mechanical power of the motor; t _ m represents the motor torque capacity; n _ m represents the motor speed.

Optionally, determining a second motor loss power of the motor based on the difference between the motor electric power and the motor mechanical power; illustratively, the mechanical power of the motor is determined based on the following formula:

P_mLoss2＝P_mEle-P_mMec

where P _ mLoss2 represents the second motor loss power.

Optionally, the motor loss power of the motor is determined based on a comparison result of the first motor loss power and the second motor loss power. Specifically, the power loss with the largest value may be determined as the power loss of the motor; an exemplary determination of motor power loss is based on the following expression:

P_mLoss＝Max(P_mLoss1，P_mLoss2)

wherein P _ mLoss represents motor power loss.

Further, determining the motor torque loss of the motor based on the ratio of the motor loss power and the motor rotating speed; illustratively, the motor torque loss of the electric machine is determined based on the following expression:

T_mLoss＝(9549×P_mLoss)/n_m

where T _ mLoss represents motor torque loss.

In this embodiment, the motor wheel end torque capabilities include a motor wheel end minimum sustained torque capability, a motor wheel end minimum peak torque capability, a motor wheel end maximum sustained electric torque capability, and a motor wheel end maximum peak torque capability.

Specifically, if the torque capacity of the wheel end of the motor comprises the minimum continuous torque capacity of the wheel end of the motor;

correspondingly, determining the motor wheel end torque capacity of the drive system based on the motor initial torque capacity, the motor torque loss, the transmission torque loss of the drive system and the wheel end transmission ratio of the drive system, includes:

and determining the motor wheel end minimum continuous torque capacity of the driving system based on the motor initial minimum continuous torque capacity, the motor torque loss, the gearbox torque loss of the driving system and the wheel end transmission ratio value of the driving system in the motor initial torque capacity.

Illustratively, the motor wheel end minimum continuous torque capability is determined based on the following equation:

-(|T_mMinCtChrg+T_mLoss|-T_TranLoss)×i_TranRatio；

wherein T _ mMinCtChrg represents a motor initial minimum sustained torque capability of the motor initial torque capabilities; t _ mLoss represents motor torque loss; t _ TranLoss represents transmission torque loss; i _ TranRatio represents a wheel end transmission ratio value.

Specifically, if the torque capacity of the wheel end of the motor comprises the minimum peak torque capacity of the wheel end of the motor;

and determining the motor wheel end minimum peak torque capacity of the driving system based on the motor initial minimum peak torque capacity, the motor torque loss, the gearbox torque loss of the driving system and the wheel end transmission ratio of the driving system in the motor initial torque capacity.

Illustratively, the motor wheel end minimum peak torque capability is determined based on the following equation:

-(|T_mMinPkChrg+T_mLoss|-T_TranLoss)×i_TranRatio

wherein T _ mminpkcchrg represents a motor initial minimum peak torque capability among the motor initial torque capabilities; t _ mLoss represents motor torque loss; t _ TranLoss represents transmission torque loss; i _ TranRatio represents a wheel end transmission ratio value.

Specifically, if the torque capacity of the wheel end of the motor comprises the maximum continuous torque capacity of the wheel end of the motor;

and determining the maximum continuous torque capacity of the motor wheel end of the driving system based on the initial maximum continuous torque capacity of the motor, the torque loss of a gearbox of the driving system and the wheel end transmission ratio of the driving system in the initial torque capacity of the motor.

Illustratively, the motor wheel end maximum continuous torque capability is determined based on the following equation:

(T_mMaxCtDisrg+T_mLoss-T_TranLoss)×i_TranRatio；

wherein T _ mmaxctdistrg represents the motor initial maximum sustained torque capability of the motor initial torque capabilities; t _ mLoss represents motor torque loss; t _ TranLoss represents transmission torque loss; i _ TranRatio represents a wheel end transmission ratio value.

Specifically, if the torque capacity of the wheel end of the motor comprises the maximum peak torque capacity of the wheel end of the motor;

and determining the maximum peak torque capacity of the wheel end of the motor of the driving system based on the initial maximum peak torque capacity of the motor, the torque loss of a gearbox of the driving system and the transmission ratio of the wheel end of the driving system in the initial torque capacity of the motor.

Illustratively, the motor wheel end maximum peak torque capability is determined based on the following equation:

(T_mMaxPkDisrg+T_mLoss-T_TranLoss)×i_TranRatio；

wherein T _ mmaxpkdistg represents an initial maximum peak torque capacity of the motor among initial torque capacities of the motor; t _ mLoss represents motor torque loss; t _ TranLoss represents transmission torque loss; i _ TranRatio represents a wheel end transmission ratio value.

S130, obtaining engine net torque capacity of an engine in the driving system, determining engine wheel end torque capacity of the driving system based on the net torque capacity and gearbox torque loss, and determining hybrid wheel end torque capacity of the driving system based on the motor wheel end torque capacity and the engine wheel end torque capacity.

In the present embodiment, the net engine torque capacity of the engine may be determined based on the engine torque capacity of the engine and the engine friction torque capacity. Alternatively, the engine net torque capacity of the engine may be determined by obtaining an engine torque capacity of the engine and an engine friction torque capacity, and determining the engine net torque capacity of the engine based on the engine torque capacity and the engine friction torque capacity.

Wherein the engine torque capacity of the engine comprises an engine maximum torque capacity and an engine minimum torque capacity; accordingly, the net engine torque capacity of the engine includes a maximum net engine torque capacity and a minimum net engine torque capacity.

Specifically, if the net engine torque capacity of the engine comprises a maximum net engine torque capacity, determining the net engine torque capacity of the engine based on the engine torque capacity and the engine friction torque capacity accordingly comprises:

determining an engine maximum net torque capacity of the engine based on a difference between the engine maximum torque capacity and the engine friction torque capacity; for example, the maximum net engine torque capacity of the engine may be determined based on the following equation:

T_EngMaxPu＝T_EngMax-T_EngLoss

wherein T _ EngMaxPu represents the maximum net engine torque capacity of the engine; t _ EngMax represents the engine torque capacity; t _ EngLoss represents the engine friction torque capability.

Specifically, if the net engine torque capacity of the engine comprises a minimum net engine torque capacity, determining the net engine torque capacity of the engine based on the engine torque capacity and the engine friction torque capacity accordingly comprises:

determining an engine minimum net torque capacity of the engine based on a difference between the engine minimum torque capacity and the engine friction torque capacity; for example, the engine minimum net torque capacity of the engine may be determined based on the following equation:

T_EngMinPu＝T_EngMin-T_EngLoss

wherein T _ EngMinPu represents an engine minimum net torque capacity of the engine; t _ EngMin represents the engine minimum torque capacity; t _ EngLoss represents the engine friction torque capability.

Further, after determining the engine net torque capacity, an engine wheel end torque capacity of the drive system is determined based on the engine net torque capacity, the transmission torque loss, and the transmission torque loss.

In the present embodiment, the engine wheel end torque capacity includes an engine minimum wheel end torque capacity and an engine maximum wheel end torque capacity.

Specifically, if the engine wheel end torque capacity comprises the minimum wheel end torque capacity of the engine; accordingly, determining an engine wheel end torque capacity of the drive system based on the net torque capacity, the transmission torque loss, and the transmission torque loss includes: an engine minimum wheel end torque capacity of the drive system is determined based on an engine minimum torque capacity of the net torque capacity of the engine, a transmission torque loss, and a wheel end gear ratio value.

Illustratively, the engine minimum wheel end torque capacity is determined based on the following equation:

(T_EngMin-T_EngLoss-T_TranLoss)×i_TranRatio；

wherein T _ EngMin represents the engine minimum torque capacity; t _ EngLoss represents engine friction torque capability; t _ EngMinPu represents the minimum net torque capacity of the engine; t _ TranLoss represents transmission torque loss; i _ TranRatio represents a wheel end transmission ratio value.

Specifically, if the engine wheel end torque capacity comprises the maximum wheel end torque capacity of the engine;

accordingly, determining an engine wheel end torque capacity of the drive system based on the net torque capacity, the transmission torque loss, and the transmission torque loss includes:

an engine maximum wheel end torque capacity of the drive system is determined based on the engine maximum torque capacity, the transmission torque loss, and the wheel end drive ratio value in the net torque capacity of the engine.

Illustratively, the engine maximum wheel end torque capacity is determined based on the following equation:

(T_EngMax-T_EngLoss-T_TranLoss)×i_TranRatio；

wherein T _ EngMax represents the engine maximum torque capacity; t _ EngLoss represents engine friction torque capability; t _ EngMaxPu represents the maximum net torque capacity of the engine; t _ TranLoss represents transmission torque loss; i _ TranRatio represents a wheel end transmission ratio value.

Further, after determining the motor wheel end torque capacity and the engine wheel end capacity in the drive system, a hybrid wheel end torque capacity of the drive system is determined based on the motor wheel end torque capacity and the engine wheel end capacity.

In an embodiment of the present invention, the hybrid wheel end torque capabilities of the drive system include a hybrid wheel end minimum creep torque capability, a hybrid wheel end minimum peak torque capability, a hybrid wheel end maximum creep torque capability, and a hybrid wheel end maximum peak torque capability.

Specifically, if the hybrid wheel end torque capacity comprises a hybrid wheel end minimum continuous torque capacity;

correspondingly, determining a hybrid wheel end torque capacity of the drive system based on the motor wheel end torque capacity, the engine wheel end torque capacity, the transmission torque loss, and the wheel end drive ratio, includes:

a hybrid wheel end minimum creep torque capability of the drive system is determined based on an engine minimum torque capability of the net engine torque capabilities and an electric machine initial minimum creep torque capability of the electric machine initial torque capabilities.

Illustratively, the hybrid wheel end minimum continuous torque capability is determined based on the following equation:

(T_EngMinPu+|T_mMinCtChrg+T_mLoss|-T_TranLoss)×i_TranRatio；

wherein T _ EngMinPu represents the minimum net torque capacity of the engine; t _ mMinCtChrg represents a motor initial minimum sustained torque capability of the motor initial torque capabilities; t _ mLoss represents motor torque loss; t _ TranLoss represents transmission torque loss; i _ TranRatio represents a wheel end transmission ratio value.

Specifically, if the hybrid wheel end torque capacity comprises a hybrid wheel end minimum peak torque capacity;

a hybrid wheel end minimum peak torque capability of the drive system is determined based on an engine minimum torque capability of the net engine torque capabilities and an electric machine initial minimum peak torque capability of the electric machine initial torque capabilities.

Illustratively, the hybrid wheel end minimum peak torque capability is determined based on the following equation:

(T_EngMinPu+|T_mMinPkChrg+T_mLoss|-T_TranLoss)×i_TranRatio

wherein T _ EngMinPu represents the minimum net torque capacity of the engine; t _ mMinPkChrg represents a motor initial minimum peak torque capability among the motor initial torque capabilities; t _ mLoss represents motor torque loss; t _ TranLoss represents transmission torque loss; i _ TranRatio represents a wheel end transmission ratio value.

Specifically, if the hybrid wheel end torque capacity comprises a hybrid wheel end maximum sustained torque capacity;

a hybrid wheel end maximum creep torque capability of the drive system is determined based on an engine maximum creep torque capability of the net engine torque capability and an electric machine initial maximum creep torque capability of the electric machine initial torque capability.

Illustratively, the hybrid wheel end maximum continuous torque capability is determined based on the following equation:

(T_EngMaxPu+T_mMaxCtDisrg+T_mLoss-T_TranLoss)×i_TranRatio

wherein T _ EngMaxPu represents the maximum net torque capacity of the engine; t _ mmaxctdirg denotes a motor initial maximum sustained torque capacity among motor initial torque capacities; t _ mLoss represents motor torque loss; t _ TranLoss represents transmission torque loss; i _ TranRatio represents a wheel end transmission ratio value.

Specifically, if the hybrid wheel end torque capacity comprises a hybrid wheel end maximum peak torque capacity;

a hybrid wheel end peak maximum torque capability of the drive system is determined based on an engine peak torque capability of the net engine torque capability and an electric machine initial peak maximum torque capability of the electric machine initial torque capability.

Illustratively, the hybrid wheel end maximum peak torque capability is determined based on the following equation:

(T_EngMaxPu+T_mMaxPkDisrg+T_mLoss-T_TranLoss)×i_TranRatio

wherein T _ EngMaxPu represents the maximum net torque capacity of the engine; t _ mmaxpkdistg represents an initial maximum peak torque capacity of the motor among initial torque capacities of the motor; t _ mLoss represents motor torque loss; t _ TranLoss represents transmission torque loss; i _ TranRatio represents a wheel end transmission ratio value.

Example two

Fig. 2 is a flowchart of a method for determining a torque capacity of a hybrid wheel end according to a second embodiment of the present invention, where on the basis of the foregoing embodiments, after "obtaining a net torque capacity of an engine in a drive system, determining a torque capacity of the engine wheel end of the drive system based on the net torque capacity and a torque loss of a transmission, and determining a torque capacity of the hybrid wheel end of the drive system based on a torque capacity of the wheel end of a motor and the torque capacity of the wheel end of the engine", the present embodiment adds "obtaining a current driving condition of a vehicle, and determining a required torque capacity corresponding to the driving condition based on the driving condition and the torque capacity of the hybrid wheel end", and explanations of terms the same as or corresponding to the foregoing embodiments are omitted. Referring to fig. 2, the present embodiment provides a hybrid wheel end torque capacity determination method including:

s210, obtaining battery power of a battery in a driving system, air conditioner power of an air conditioner, converter power of a converter and motor reserved power of a motor, and determining the motor power of the motor based on the battery power, the air conditioner power, the converter power, the motor reserved power and the motor efficiency.

S220, determining the initial torque capacity of the motor of the driving system based on the motor power of the motor, and determining the wheel end torque capacity of the motor of the driving system based on the initial torque capacity of the motor, the torque loss of a gearbox of the driving system and the wheel end transmission ratio of the driving system.

S230, obtaining the net torque capacity of an engine in the driving system, determining the wheel end torque capacity of the engine of the driving system based on the net torque capacity and the torque loss of the gearbox, and determining the mixed wheel end torque capacity of the driving system based on the wheel end torque capacity of the motor and the wheel end torque capacity of the engine.

S240, obtaining the running condition of the current vehicle, and determining the required torque capacity corresponding to the running condition based on the running condition and the torque capacity of the hybrid wheel end.

In the embodiment, the driving conditions of the vehicle may include driving conditions such as emergency overtaking, emergency braking, normal driving, and energy recovery.

Specifically, when the vehicle is in a normal driving condition or an energy recovery condition, the vehicle controller reasonably uses the minimum continuous/maximum continuous torque capacity of the driving system to determine the corresponding required torque capacity under the current condition by combining the driving state of the vehicle so as to meet the driving condition of a user.

Specifically, when the vehicle is in a passing working condition or an emergency braking working condition, the vehicle controller reasonably uses the minimum peak value/maximum peak value torque capacity of the driving system to determine the corresponding required torque capacity under the current working condition by combining the running state of the vehicle so as to meet the running working condition of a user.

According to the technical scheme of the embodiment, the power and torque capacity characteristics of each power source, the charge and discharge power and the torque capacity under different conditions are considered, and finally the minimum continuous/maximum continuous wheel end torque capacity and the minimum peak value/maximum peak value wheel end torque capacity of the power system can be effectively and reliably calculated; and further, according to the working condition of the vehicle, the required torque capacity corresponding to the working condition is determined, so that the driving output capacity of the whole vehicle is ensured, the whole vehicle can carry out effective energy recovery, and the aims of energy conservation and emission reduction are finally achieved.

The following is an embodiment of the hybrid wheel end torque capacity determination apparatus provided in the embodiments of the present invention, which belongs to the same inventive concept as the hybrid wheel end torque capacity determination methods of the above embodiments, and reference may be made to the embodiment of the hybrid wheel end torque capacity determination method described above for details that are not described in detail in the embodiments of the hybrid wheel end torque capacity determination apparatus.

EXAMPLE III

Fig. 3 is a schematic structural diagram of a hybrid wheel end torque capacity determining apparatus according to a third embodiment of the present invention, which is applicable to a performance test in a software test. The concrete structure of the hybrid wheel end torque capacity determination device comprises: a motor power determination module 310, a motor wheel end torque capability determination module 320, and a hybrid wheel end torque capability determination module 330; wherein the content of the first and second substances,

a motor power determination module 310, configured to obtain a battery power of a battery in a driving system, an air conditioner power of an air conditioner, a converter power of a converter, and a motor reserve power of a motor, and determine the motor power of the motor based on the battery power, the air conditioner power, the converter power, the motor reserve power, and a motor efficiency;

a motor wheel end torque capacity determination module 320, configured to determine a motor initial torque capacity of the drive system based on a motor power of the motor, and determine a motor wheel end torque capacity of the drive system based on the motor initial torque capacity, a motor torque loss, a transmission torque loss of the drive system, and a wheel end transmission ratio of the drive system;

a hybrid wheel end torque capability determination module 330 configured to obtain an engine net torque capability of an engine in the drive system, determine an engine wheel end torque capability of the drive system based on the net torque capability and the transmission torque loss, and determine a hybrid wheel end torque capability of the drive system based on the motor wheel end torque capability and the engine wheel end torque capability.

According to the technical scheme of the embodiment of the invention, the battery power of a battery in a driving system, the air conditioner power of an air conditioner, the converter power of a converter and the motor reserved power of a motor are obtained, and the motor power of the motor is determined based on the battery power, the air conditioner power, the converter power, the motor reserved power and the motor efficiency; more accurate motor power is determined based on the working power of various modules in the driving system; further determining a motor initial torque capacity of the driving system based on the motor power of the motor, and determining a motor wheel end torque capacity of the driving system based on the motor initial torque capacity, the motor torque loss, a gearbox torque loss of the driving system and a wheel end transmission ratio of the driving system; based on the torque loss and the rated output torque of the driving motor, the output torque of the driving system motor at the wheel end determined by the driving motor is effectively calculated, so that the reliability and the accuracy of the torque capacity of the motor in the driving system are improved; obtaining the net torque capacity of an engine in the driving system, and determining the wheel end torque capacity of the engine of the driving system based on the net torque capacity and the torque loss of the gearbox, so as to determine the mixed wheel end torque capacity of the driving system based on the wheel end torque capacity of the motor and the wheel end torque capacity of the engine; the wheel end torque capacity of the engine is determined based on the torque capacity of the engine, so that the reliability and the accuracy of the engine torque capacity in the hybrid drive system are improved; and determining the torque capacity of the hybrid wheel end of the driving system based on the torque capacity of the motor and the torque capacity of the engine, so that the reliability and the accuracy of the torque capacity of the hybrid wheel end output by the driving system are further improved.

On the basis of the above embodiments, if the motor power includes the maximum continuous charging power of the motor;

accordingly, the motor power determination module 310 includes:

a motor maximum continuous charging power determination unit of the motor, configured to determine a motor maximum continuous charging power of the motor based on a product of a battery continuous charging power and a continuous charging power temperature correction coefficient in the battery power, the air conditioner power, the converter power, a motor maximum continuous charging reserved power in the motor reserved power, and a motor efficiency;

if the motor power comprises the maximum peak charging power of the motor;

accordingly, the motor power determination module 310 includes:

a motor maximum peak charging power determination unit for determining a motor maximum peak charging power of the motor based on a product of a battery peak charging power and a peak charging power temperature correction coefficient in the battery power, the air conditioner power, the converter power, a motor maximum peak charging reserve power in the motor reserve power, and a motor efficiency;

accordingly, the motor power determination module 310 includes:

a motor maximum sustained discharge power determination unit of a motor for determining a motor maximum sustained discharge power of the motor based on a product of a battery sustained discharge power and a sustained discharge power temperature correction coefficient in the battery power, the air conditioning power, the converter power, a motor maximum sustained discharge reserve power in the motor reserve power, and a motor efficiency;

if the motor power comprises the maximum peak discharge power of the motor;

accordingly, the motor power determination module 310 includes:

a motor maximum peak discharge power determination unit for determining a motor maximum peak discharge power of the motor based on a product of a battery peak discharge power and a peak discharge power temperature correction coefficient in the battery power, the air conditioner power, the converter power, a motor maximum peak discharge reserve power in the motor reserve power, and a motor efficiency.

Based on the above embodiments, the motor wheel end torque capacity determination module 320 includes:

an initial torque capacity determination unit for determining an initial torque capacity of the motor based on a ratio of motor power to motor speed of the motor;

the motor maximum allowable torque capacity determining unit is used for acquiring the motor body maximum torque capacity corrected by the motor body temperature, the motor IGBT maximum torque capacity corrected by the motor IGBT temperature and the motor bus voltage maximum torque capacity corrected by the motor bus voltage, and determining the motor maximum allowable torque capacity of the motor based on the numerical comparison result of the motor body maximum torque capacity, the motor IGBT maximum torque capacity and the motor bus voltage maximum torque capacity;

a motor initial torque capacity determination unit, configured to determine a motor initial torque capacity of the drive system based on a comparison result of the values of the motor maximum allowable torque capacity, the initial torque capacity, and a driveline torque capacity of the motor.

On the basis of the above embodiments, if the motor wheel end torque capacity includes a motor wheel end minimum continuous torque capacity;

accordingly, the motor wheel end torque capacity determination module 320 includes:

a motor wheel end minimum continuous torque capacity determining unit, configured to determine a motor wheel end minimum continuous torque capacity of the drive system based on a motor initial minimum continuous torque capacity, a motor torque loss, a transmission torque loss of the drive system, and a wheel end transmission ratio of the drive system in the motor initial torque capacities;

the motor wheel end minimum peak torque capacity determining unit is used for determining the motor wheel end minimum peak torque capacity of the driving system based on the motor initial minimum peak torque capacity, the motor torque loss, the gearbox torque loss of the driving system and the wheel end transmission ratio of the driving system in the motor initial torque capacity;

the motor wheel end maximum continuous torque capacity determining unit is used for determining the motor wheel end maximum continuous torque capacity of the driving system based on the motor initial maximum continuous torque capacity, the motor torque loss, the gearbox torque loss of the driving system and the wheel end transmission ratio of the driving system in the motor initial torque capacity;

and the motor wheel end maximum peak torque capacity determining unit is used for determining the motor wheel end maximum peak torque capacity of the driving system based on the motor initial maximum peak torque capacity, the motor torque loss, the gearbox torque loss of the driving system and the wheel end transmission ratio of the driving system in the motor initial torque capacity.

Based on the above embodiments, the hybrid wheel end torque capacity determination module 330 includes:

an engine net torque capacity determination unit for obtaining an engine torque capacity and an engine friction torque capacity of the engine and determining the engine net torque capacity of the engine based on the engine torque capacity and the engine friction torque capacity;

accordingly, the hybrid wheel end torque capacity determination module 330 includes:

an engine minimum wheel end torque capacity determination unit for determining an engine minimum wheel end torque capacity of the drive system based on the engine minimum torque capacity of the engine net torque capacity, the gearbox torque loss and the wheel end transmission ratio value;

an engine maximum wheel end torque capacity determination unit for determining an engine maximum wheel end torque capacity of the drive system based on the engine maximum torque capacity of the net engine torque capacity, the gearbox torque loss and the wheel end transmission ratio value.

On the basis of the above embodiments, if the hybrid wheel end torque capacity includes a hybrid wheel end minimum continuous torque capacity;

a hybrid wheel end minimum creep torque capacity determination unit for determining a hybrid wheel end minimum creep torque capacity of the drive system based on an engine minimum torque capacity of the engine net torque capacities and a motor initial minimum creep torque capacity of the motor initial torque capacities;

a hybrid wheel end minimum peak torque capacity determination unit for determining a hybrid wheel end minimum peak torque capacity of the drive system based on an engine minimum torque capacity of the engine net torque capacities and a motor initial minimum peak torque capacity of the motor initial torque capacities;

a hybrid wheel end maximum creep torque capacity determination unit for determining a hybrid wheel end maximum creep torque capacity of the drive system based on an engine maximum torque capacity of the engine net torque capacities and a motor initial maximum creep torque capacity of the motor initial torque capacities;

a hybrid wheel end peak maximum torque capacity determination unit for determining a hybrid wheel end peak maximum torque capacity of the drive system based on an engine peak maximum torque capacity of the net engine torque capacities and an electric machine peak initial maximum torque capacity of the electric machine initial torque capacities.

On the basis of the above embodiments, the apparatus further includes:

the required torque capacity determining unit is used for acquiring the running condition of the current vehicle after determining the mixed wheel end torque capacity of the driving system, and determining the required torque capacity corresponding to the running condition based on the running condition and the mixed wheel end torque capacity.

The hybrid wheel end torque capacity determining device provided by the embodiment of the invention can execute the hybrid wheel end torque capacity determining method provided by any embodiment of the invention, and has corresponding functional modules and beneficial effects of the executing method. It should be noted that, in the embodiment of the hybrid wheel end torque capacity determining apparatus, the included units and modules are only divided according to the functional logic, but are not limited to the above division as long as the corresponding functions can be realized; in addition, specific names of the functional units are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present invention.

Example four

Fig. 4 is a schematic structural diagram of an electronic device according to a fourth embodiment of the present invention. FIG. 4 illustrates a block diagram of an exemplary electronic device 12 suitable for use in implementing embodiments of the present invention. The electronic device 12 shown in fig. 4 is only an example and should not bring any limitation to the function and the scope of use of the embodiment of the present invention.

As shown in FIG. 4, electronic device 12 is embodied in the form of a general purpose computing electronic device. The components of electronic device 12 may include, but are not limited to: one or more processors or processing units 16, a system memory 28, and a bus 18 that couples various system components including the system memory 28 and the processing unit 16.

Bus 18 represents one or more of any of several types of bus structures, including a memory bus or memory controller, a peripheral bus, an accelerated graphics port, and a processor or local bus using any of a variety of bus architectures. By way of example, such architectures include, but are not limited to, Industry Standard Architecture (ISA) bus, micro-channel architecture (MAC) bus, enhanced ISA bus, Video Electronics Standards Association (VESA) local bus, and Peripheral Component Interconnect (PCI) bus.

Electronic device 12 typically includes a variety of computer system readable media. Such media may be any available media that is accessible by electronic device 12 and includes both volatile and nonvolatile media, removable and non-removable media.

The system memory 28 may include computer system readable media in the form of volatile memory, such as Random Access Memory (RAM)30 and/or cache memory 32. The electronic device 12 may further include other removable/non-removable, volatile/nonvolatile computer system storage media. By way of example only, storage system 34 may be used to read from and write to non-removable, nonvolatile magnetic media (not shown in FIG. 4, and commonly referred to as a "hard drive"). Although not shown in FIG. 4, a magnetic disk drive for reading from and writing to a removable, nonvolatile magnetic disk (e.g., a "floppy disk") and an optical disk drive for reading from or writing to a removable, nonvolatile optical disk (e.g., a CD-ROM, DVD-ROM, or other optical media) may be provided. In these cases, each drive may be connected to bus 18 by one or more data media interfaces. System memory 28 may include at least one program product having a set (e.g., at least one) of program modules that are configured to carry out the functions of embodiments of the invention.

A program/utility 40 having a set (at least one) of program modules 42 may be stored, for example, in system memory 28, such program modules 42 including, but not limited to, an operating system, one or more application programs, other program modules, and program data, each of which examples or some combination thereof may comprise an implementation of a network environment. Program modules 42 generally carry out the functions and/or methodologies of the described embodiments of the invention.

Electronic device 12 may also communicate with one or more external devices 14 (e.g., keyboard, pointing device, display 24, etc.), with one or more devices that enable a user to interact with electronic device 12, and/or with any devices (e.g., network card, modem, etc.) that enable electronic device 12 to communicate with one or more other computing devices. Such communication may be through an input/output (I/O) interface 22. Also, the electronic device 12 may communicate with one or more networks (e.g., a Local Area Network (LAN), a Wide Area Network (WAN), and/or a public network, such as the Internet) via the network adapter 20. As shown in FIG. 4, the network adapter 20 communicates with the other modules of the electronic device 12 via the bus 18. It should be appreciated that although not shown in FIG. 4, other hardware and/or software modules may be used in conjunction with electronic device 12, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems, among others.

The processing unit 16 executes various functional applications and sample data acquisition by running a program stored in the system memory 28, for example, implementing the steps of a hybrid wheel end torque capacity determination method provided in the present embodiment, the hybrid wheel end torque capacity determination method including:

Of course, those skilled in the art can understand that the processor may also implement the technical solution of the sample data obtaining method provided in any embodiment of the present invention.

EXAMPLE five

The fifth embodiment provides a computer readable storage medium, on which a computer program is stored, the program, when executed by a processor, implementing the steps of a hybrid wheel end torque capacity determination method provided by the fifth embodiment of the present invention, for example, the hybrid wheel end torque capacity determination method includes:

Computer storage media for embodiments of the invention may employ any combination of one or more computer-readable media. The computer readable medium may be a computer readable signal medium or a computer readable storage medium. The computer-readable storage medium may be, for example but not limited to: an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples (a non-exhaustive list) of the computer readable storage medium would include the following: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the context of this document, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.

A computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take many forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.

Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to: wireless, wire, fiber optic cable, RF, etc., or any suitable combination of the foregoing.

Computer program code for carrying out operations for aspects of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, Smalltalk, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet service provider).

It will be understood by those skilled in the art that the modules or steps of the invention described above may be implemented by a general purpose computing device, they may be centralized on a single computing device or distributed across a network of computing devices, and optionally they may be implemented by program code executable by a computing device, such that it may be stored in a memory device and executed by a computing device, or it may be separately fabricated into various integrated circuit modules, or it may be fabricated by fabricating a plurality of modules or steps thereof into a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.

It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A hybrid wheel end torque capacity determination method, applied to a hybrid drive system, comprising:

2. The method of claim 1, wherein if the motor power comprises a motor maximum continuous charging power;

if the motor power comprises the maximum peak charging power of the motor;

if the motor power comprises the maximum peak discharge power of the motor;

3. The method of claim 1, wherein the determining a motor initial torque capacity of the motor based on a motor power of the motor comprises:

4. The method of claim 1, wherein if the motor wheel end torque capacity comprises a motor wheel end minimum continuous torque capacity;

5. The method of claim 1, wherein the obtaining a net engine torque capacity of an engine in the drive system and determining an engine wheel end torque capacity of the drive system based on the net torque capacity, the transmission torque loss, and the transmission torque loss comprises:

6. The method of claim 1, wherein if the hybrid wheel end torque capacity comprises a hybrid wheel end minimum continuous torque capacity;

7. The method of claim 1, after determining a hybrid wheel end torque capability of the drive system, further comprising:

8. A hybrid wheel end torque capacity determination device, comprising:

9. An electronic device, comprising:

one or more processors;

a storage device for storing one or more programs,

when executed by the one or more processors, cause the one or more processors to implement the hybrid wheel end torque capability determination method of any of claims 1-7.

10. A computer-readable storage medium, on which a computer program is stored, which program, when executed by a processor, carries out the hybrid wheel end torque capacity determination method according to any one of claims 1 to 7.