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Electric vehicle ramp parking control method, control system and electric vehicle

A technology for electric vehicles and control methods, applied in electric vehicles, electric braking systems, control driving, etc., can solve problems such as unspecified explanations, and achieve the effects of avoiding back slipping, simplifying entry conditions, and improving driving convenience.

Active Publication Date: 2020-12-01
CHINA FIRST AUTOMOBILE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the control methods for hill parking in the prior art for hill deceleration and parking all mention that the motor provides a certain torque to balance the gravity component of the vehicle on the slope to make the vehicle stationary, but how to calculate this for balancing the vehicle The motor torque for the gravitational component on the ramp, however, is not specified

Method used

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  • Electric vehicle ramp parking control method, control system and electric vehicle

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Embodiment 1

[0040] This embodiment provides a control system for parking an electric vehicle on a slope. The control system includes a vehicle controller, a motor, a motor controller, an accelerator pedal, a brake pedal, an ABS controller and an ESP controller. The motor is electrically connected to the vehicle controller, and the motor controller is electrically connected to the motor to detect the speed of the motor, send the detected speed to the vehicle controller, and convert the torque request value sent by the vehicle controller into current The value is sent to the motor. There is an accelerator pedal position sensor on the accelerator pedal, and the accelerator pedal position sensor is electrically connected to the vehicle controller; there is a brake pedal position sensor on the brake pedal, and the brake pedal position sensor is electrically connected to the vehicle controller; the ABS controller is used It is used to collect the brake pressure in the brake master cylinder of t...

Embodiment 2

[0049] like figure 1 As shown, this embodiment provides a ramp parking control method for an electric vehicle, which is used in the ramp parking control system for an electric vehicle provided in Embodiment 1, and mainly includes the following steps:

[0050] Step 1. Correct the motor speed signal according to the gear position of the vehicle.

[0051] Specifically, the vehicle controller corrects the received motor speed signal. When the vehicle moves toward the front, the motor speed is positive, and when the vehicle moves toward the rear, the motor speed is negative. In order to ensure that the positive and negative of the motor speed are consistent when the D gear or the R gear is sliding, when the R gear is used, the current motor speed signal is multiplied by -1 as the corrected motor speed signal output. The current motor speed signal is output as the corrected motor speed signal.

[0052] Step 2: performing low-pass filtering on the corrected motor speed signal to ob...

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Abstract

The invention relates to the technical field of electric automobiles, and discloses an electric automobile ramp parking control method, an electric automobile ramp parking control system and an electric automobile. The electric automobile ramp parking control method includes following steps: amending motor rotation speed signals according to automobile gear positions; performing low pass filteringon the amended motor rotation speed signals, and obtaining a low frequency signal of the motor rotation speed signals; comparing the low frequency signal of the motor rotation speed signals with a set range value of a zero interval of motor rotation speed, and obtaining first motor rotation speed not within the zero interval range of the motor rotation speed; obtaining rotation speed deviation and accelerated speed deviation through the first motor rotation speed; judging if an automobile slip prevention function is started, and if yes, obtaining slip prevention torque according to the rotation speed deviation and the accelerated speed deviation; and comparing the slip prevention torque with current brake torque of the automobile, and outputting compensation torque so as to park the automobile. The electric automobile ramp parking control method effectively prevents the automobile from slipping back on a ramp, and improves driving safety.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to a parking control method for an electric vehicle on a slope, a control system and the electric vehicle. Background technique [0002] For electric vehicles, since the motor can provide both positive torque to drive the vehicle forward, and negative torque to decelerate and brake the vehicle, during the operation of the vehicle, the opening of the accelerator pedal and the current vehicle speed can be used to determine The motor is controlled to generate positive or negative torque of different sizes, which is the so-called "single-pedal" driving mode. In the single-pedal driving mode, in most of the daily driving conditions, the driver can control the vehicle to move forward or decelerate and brake only by using the accelerator pedal, which avoids the need to decelerate the vehicle by stepping on the brake pedal in the past, and saves the frequent The operation of swit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L15/20B60L7/00B60T13/74
CPCB60L7/00B60L15/2018B60L2240/423B60T13/74Y02T10/72
Inventor 祝浩徐家良
Owner CHINA FIRST AUTOMOBILE
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