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Control method and device for electric vehicle, and electric vehicle

A technology of electric vehicles and control methods, which is applied in the direction of control devices, electric vehicles, control drives, etc., and can solve problems such as difficult control

Inactive Publication Date: 2020-06-09
BORGWARD AUTOMOTIVE CHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, electric vehicles can realize the slope assist function through the motor, but most electric vehicles are not equipped with slope sensors, which are powerless to judge the slope and difficult to control

Method used

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  • Control method and device for electric vehicle, and electric vehicle
  • Control method and device for electric vehicle, and electric vehicle
  • Control method and device for electric vehicle, and electric vehicle

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Embodiment Construction

[0020] Specific embodiments of the present disclosure will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present disclosure, and are not intended to limit the present disclosure.

[0021] For an electric vehicle that is not equipped with a slope sensor, the slope of the road where the vehicle is located can be judged by judging whether the vehicle is sliding or not. This will cause two problems. First, in order to prevent misjudgment, it takes a certain amount of time to judge the slope. Therefore, the intervention will not be timely and the distance of the slope will be too long. Second, when encountering shaking and other situations, it is easy to misjudgment and enter the ramp assist state, causing confusion. Therefore, the inventor thought that when the handbrake is released and the accelerator is released, the electric vehicle can...

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Abstract

The invention relates to a control method and device for an electric vehicle, and the electric vehicle. The method comprises the following steps: when the vehicle speed of the electric vehicle is smaller than a preset vehicle speed threshold value, a hand brake of the electric vehicle is in a loosened state, and when the stroke of a brake pedal of the electric vehicle is smaller than a preset stroke threshold value, the electric vehicle is controlled to enter a hill-holding mode; the torque of a motor of the electric vehicle is adjusted so as to carry out closed-loop control with the rotatingspeed being zero on the motor; and according to the torque of the motor in the closed-loop control, the electric vehicle is controlled to keep or quit the hill-holding mode. Thus, the situation of slope sliding caused by a common method is avoided, and the slope assisting function can be achieved without installing a slope sensor in the electric vehicle.

Description

technical field [0001] The present disclosure relates to the field of vehicle control, in particular, to a control method and device for an electric vehicle, and the electric vehicle. Background technique [0002] A fuel vehicle equipped with an electronic parking system (Electrical Parking Brake, EPB) has the function of hill assist. At present, electric vehicles can realize the slope assist function through the motor, but most electric vehicles are not equipped with slope sensors, which are powerless to judge the slope and difficult to control. Contents of the invention [0003] The purpose of the present disclosure is to provide a simple and efficient control method, device and electric vehicle for electric vehicles. [0004] In order to achieve the above object, the present disclosure provides a control method for an electric vehicle. The method includes: when the vehicle speed of the electric vehicle is less than a predetermined vehicle speed threshold, the handbrak...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60W30/18B60L15/20
CPCB60L15/2018B60L2240/423B60W30/18118Y02T10/72
Inventor 陈瀚
Owner BORGWARD AUTOMOTIVE CHINA CO LTD
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