Determination method for drive force to be requested for hybrid vehicle, and apparatus

Patent metadata

Field	Value
Publication number	US-12576867-B2
Application number	US-202118280464-A
Country	US
Kind code	B2
Filing date	May 20, 2021
Priority date	May 20, 2021
Publication date	Mar 17, 2026
Grant date	Mar 17, 2026

Abstract

A determination method for a drive force to be requested for a hybrid vehicle, and an apparatus. The determination method comprises the following steps: obtaining a gear state, a current vehicle speed, a current gas pedal degree of engagement, and drive force mapping information of a vehicle, the drive force mapping information indicating a correspondence relationship between vehicle speed, gas pedal degree of engagement, and drive force; if the gear state is such that the vehicle is not in park gear or neutral gear, obtaining a driving mode and altitude data of the vehicle; and if the altitude data is less than a preset altitude, determining a drive force to be requested for the vehicle on the basis of the current vehicle speed, the current gas pedal degree of engagement, the driving mode, and the drive force mapping information.

First claim

The invention claimed is:

1 . A method for determining a requested driving force of a hybrid vehicle, comprising steps of:
acquiring a gear status, a current vehicle velocity, a current accelerator pedal opening and driving force mapping information of the vehicle, wherein the driving force mapping information represents a corresponding relationship among a vehicle velocity, an accelerator pedal opening and a driving force; acquiring altitude data and a drive mode of the vehicle if the gear status is that the vehicle is not in a parking gear or a neutral gear; and determining a requested driving force of the vehicle based on the current vehicle velocity, the current accelerator pedal opening, the drive mode and the driving force mapping information if the altitude data is less than a preset altitude; and driving the hybrid vehicle using the determined requested driving force; wherein after acquiring the gear status, the current vehicle velocity, the current accelerator pedal opening and the driving force mapping information of the vehicle, the method further comprises: acquiring a driving mode and the drive mode of the vehicle if the gear status is that the vehicle is in the parking gear or the neutral gear, wherein the driving mode comprises a forward mode and a reverse mode; determining a creep driving force according to the driving mode and the current vehicle velocity of the vehicle; determining a compensation coefficient according to the creep driving force; determining an initial requested driving force based on the drive mode, the current vehicle velocity, the current accelerator pedal opening and the driving force mapping information; and determining the requested driving force according to the initial requested driving force, the creep driving force and the compensation coefficient.

2 . The method according to claim 1 , wherein after acquiring the altitude data and the drive mode of the vehicle if the gear status is that the vehicle is not in the parking gear or the neutral gear, the method further comprises:
if the altitude data is greater than or equal to the preset altitude, and a driving manner of the vehicle is engine driving, acquiring a current engine revolution speed and mapping information of upper limit of initial engine torque of the vehicle, wherein the mapping information of the upper limit of the initial engine torque represents a corresponding relationship among a revolution speed level, a preset engine revolution speed and an upper limit value of the initial engine torque; determining a current revolution speed level and a preset engine revolution speed which is currently selected according to the current engine revolution speed and the mapping information of the upper limit of the initial engine torque; if the vehicle meets preset conditions, determining a current upper limit value of the initial engine torque according to the current engine revolution speed and the mapping information of the upper limit of the initial engine torque; acquiring a corresponding upper limit value of torque for high-altitude at the current engine revolution speed; determining a torque deviation value according to the current upper limit value of the initial engine torque and the corresponding upper limit value of the torque for high-altitude at the current engine revolution speed, wherein the torque deviation value is positively correlated with time; determining a current upper limit value of the torque for high-altitude according to the torque deviation value and the current upper limit value of the initial engine torque; determining an attenuation coefficient according to the current upper limit value of the torque for high-altitude and the current upper limit value of the initial engine torque; and determining the requested driving force of the vehicle according to the attenuation coefficient, the current vehicle velocity, the current accelerator pedal opening and the driving force mapping information.

3 . The method according to claim 2 , wherein before determining the current upper limit value of the initial engine torque according to the current engine revolution speed and the mapping information of the upper limit of the initial engine torque if the vehicle meets the preset conditions, the method further comprises:
acquiring an actual engine torque and an upper limit value of the actual engine torque; wherein the preset conditions comprise: an average change rate of engine revolution speed is less than 700 rpm; the actual engine torque is greater than 10 Nm; an upper limit of the actual engine torque is greater than 0; a difference between the preset engine revolution speed which is currently selected and the current engine revolution speed is less than 50 rpm; and the current revolution speed level is determined according to a historical revolution speed level.

4 . The method according to claim 3 , wherein determining the requested driving force of the vehicle according to the attenuation coefficient, the current vehicle velocity, the current accelerator pedal opening and the driving force mapping information comprises:
determining a flatland driving force in a current drive mode according to the current vehicle velocity, the current accelerator pedal opening and the driving force mapping information; determining a highland driving force according to the current vehicle velocity, the current accelerator pedal opening and the driving force mapping information; and acquiring the requested driving force according to the flatland driving force, the highland driving force and the attenuation coefficient in the current drive mode.

5 . The method according to claim 2 , wherein after determining the current revolution speed level and the preset engine revolution speed which is currently selected according to the current engine revolution speed and the mapping information of the upper limit of the initial engine torque, the method further comprises:
if the vehicle does not meet the preset conditions, determining the requested driving force according to the current vehicle velocity, the current accelerator pedal opening and the driving force mapping information.

6 . The method according to claim 1 , wherein determining the initial requested driving force based on the driving mode, the drive mode, the current vehicle velocity, the current accelerator pedal opening and the driving force mapping information comprises:
determining a target requested driving force according to the current vehicle velocity, the current accelerator pedal opening, the drive mode and the driving force mapping information; determining a lower limit value of a force for coasting according to the drive mode and the current vehicle velocity; and determining the lower limit value of the force for coasting as the initial requested driving force if the target requested driving force is less than the lower limit value of the force for coasting.

7 . The method according to claim 6 , wherein after determining the lower limit value of the force for coasting according to the driving mode and the current vehicle velocity, the method further comprises:
if the target requested driving force is greater than the lower limit value of the force for coasting, acquiring a wheel driving mode of the vehicle, wherein the wheel driving mode comprises electric motor driving and co-driving of electric motor-engine; determining an upper limit value of the driving force according to the wheel driving mode; and if the target requested driving force is greater than or equal to the upper limit value of the driving force, determining the upper limit value of the driving force as the initial requested driving force.

8 . The method according to claim 7 , w

Assignees

• Geely Holding Group Co Ltd
• Ningbo Geely Royal Engine Components Co Ltd
• Aurobay Tech Co Ltd
• Aurobay Ningbo Intelligent Tech Co Ltd

Inventors

• Jing Junchao
• Liu Yiqiang
• Huang Weishan
• Zuo Botao
• Wang Ruiping
• Scholten Ingo

Classifications

• B60W2510/10

  Change speed gearings · CPC title

• B60W50/10

  Interpretation of driver requests or demands · CPC title

• B60W20/10 Primary

  Controlling the power contribution of each of the prime movers to meet required power demand · CPC title

• B60W2552/25

  Road altitude · CPC title

• B60W20/11

  using model predictive control [MPC] strategies, i.e. control methods based on models predicting performance {(utilising navigation and traffic information in the control strategy B60W20/12)} · CPC title