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Single-pedal control method, device and system for electric automobile

A control method and electric vehicle technology, applied in electric vehicles, control devices, control drives, etc., can solve the problems of poor driving comfort, low control efficiency, low safety performance, etc., and achieve the effect of stable driving power performance and continuous torque output

Active Publication Date: 2020-05-05
CHINA FIRST AUTOMOBILE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, vehicles with single-pedal mode still have problems such as poor driving comfort, low safety performance, and low control efficiency.

Method used

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  • Single-pedal control method, device and system for electric automobile
  • Single-pedal control method, device and system for electric automobile
  • Single-pedal control method, device and system for electric automobile

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] figure 1 It is the flow chart of the control method in the first embodiment. This embodiment can be applied to the single-pedal control of an electric vehicle. The method can be executed by a single-pedal control device of an electric vehicle. The device can be implemented by software. Configured in electronic equipment, such as motor controller or vehicle controller, refer to figure 1 The single-pedal control method for an electric vehicle proposed in this embodiment includes:

[0033] S1. Receive pedal opening value, rate of change of pedal opening value, vehicle speed, and vehicle acceleration.

[0034] S2. Determine the required torque through the pedal opening value and the vehicle speed.

[0035] In this step, the required torque can be determined by the pedal opening value and the vehicle speed by looking up the table. Exemplarily, the following formula can also be used for calculation:

[0036]

[0037] In the formula, C is the current pedal opening value, A is the cor...

Embodiment 2

[0085] Figure 8 It is the schematic diagram of the control device in the second embodiment, refer to Figure 8 , This embodiment provides a single-pedal control device for an electric vehicle, including:

[0086] The parameter receiving module 1 is used to receive the pedal opening value, the rate of change of the pedal opening value, the vehicle speed and the vehicle acceleration. The torque calculation module 2 is used to determine the required torque through the pedal opening value and the vehicle speed. The correction module 3 is used to determine the driving state of the vehicle through the pedal opening value, the rate of change of the pedal opening value, the vehicle speed and the vehicle acceleration, and to determine the torque coefficient according to the driving state. The output torque calculation module 4 is used to correct the required torque through the torque coefficient to obtain the output torque.

[0087] Among them, the correction module 3 queries the torque c...

Embodiment 3

[0093] Picture 9 It is the schematic diagram of the control system in the third embodiment, refer to Picture 9 This embodiment proposes a single-pedal control system for an electric vehicle, including a vehicle sensor 100, a controller 200, and a motor 300, where the vehicle sensor 100 is electrically connected to the controller 200, and the controller 200 is electrically connected to the motor 300.

[0094] The controller 200 receives the pedal opening value, the rate of change of the pedal opening value, the vehicle speed, and the vehicle acceleration sent by the vehicle sensor 100. The controller 200 determines the required torque through the pedal opening value and the vehicle speed, determines the driving state of the vehicle through the pedal opening value, the rate of change of the pedal opening value, the vehicle speed, and the vehicle acceleration, and determines the torque coefficient according to the driving state. The controller 200 corrects the required torque throu...

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Abstract

The invention discloses a single-pedal control method, device and system of an electric automobile. The single-pedal control method comprises steps of receiving a pedal opening value, a pedal openingvalue change rate, a vehicle speed and a vehicle acceleration; determining a required torque according to the pedal opening value and the vehicle speed; determining a driving state of the vehicle according to the pedal opening value, the pedal opening value change rate, the vehicle speed and the vehicle acceleration, and determining a torque coefficient according to the driving state; and correcting the required torque through the torque coefficient to obtain an output torque. The single-pedal control method is advantaged in that two auxiliary input parameters, namely the pedal opening value change rate and the vehicle acceleration, are increased, redundancy of a control system is increased, the change rate of the pedal opening degree and the speed is considered, so the finally output torque is closer to the operation intention of a driver in a current vehicle driving state, and driving power performance of the electric vehicle is stable.

Description

Technical field [0001] The embodiments of the present invention relate to new energy vehicle technology, and in particular to a single-pedal control method, device and system for an electric vehicle. Background technique [0002] At present, some electric vehicles have a single-pedal control mode. In the single-pedal control mode, when the accelerator pedal is released, the driving motor will recover the kinetic energy with a larger power, so that the vehicle has been decelerated at a faster speed, so under normal road conditions , Part of the braking function can be achieved through the accelerator pedal, that is, the driver can control the acceleration and deceleration of the vehicle through the opening of the accelerator pedal. [0003] The single-pedal control system in the prior art usually includes a single-pedal, a vehicle controller, a motor controller, and a master cylinder pressure regulator of the brake system, wherein the single-pedal is provided with an opening sensor....

Claims

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Application Information

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IPC IPC(8): B60L15/20
CPCB60L15/20B60L15/2009B60L2240/12B60L2240/14B60L2240/423Y02T10/72
Inventor 郭丁伊程健徐家良刘元治
Owner CHINA FIRST AUTOMOBILE
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