Control method of electric automobile, and electric automobile

A technology for electric vehicles and vehicle speed, applied in the control of electric vehicles and the field of electric vehicles, can solve the problem of no dynamic adjustment of anti-saturation coefficient, etc., and achieve the effect of preventing vehicles from slipping.

Active Publication Date: 2015-08-19
BEIJING BORGWARD AUTOMOBILE CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] At present, there are few related technologies about automobile creep function, and the control method used in the related technology of cruise control system is PI (proportional integral, proportional integral) control, and the related technology of vehicle speed control is used in PI control. Anti-saturation coefficient, but there is no dynamic adjustment of the anti-saturation coefficient

Method used

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  • Control method of electric automobile, and electric automobile
  • Control method of electric automobile, and electric automobile
  • Control method of electric automobile, and electric automobile

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Embodiment Construction

[0026] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0027] The method for controlling an electric vehicle and the electric vehicle according to embodiments of the present invention will be described below with reference to the accompanying drawings.

[0028] figure 1 is a flowchart of a control method for an electric vehicle according to an embodiment of the present invention. Such as figure 1 As shown, the control method of an electric vehicle according to an embodiment of the present invention includes the following steps:

[0029] Step S101 , when neither the accelerator pedal nor t...

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Abstract

The invention provides a control method of an electric automobile. The control method comprises the following steps: obtaining the current speed and the gear state of the automobile when an accelerator pedal and a brake pedal of the automobile are not depressed; when the current speed is smaller than a preset speed, and the gear state is a forward or reverse gear state, obtaining a proportion coefficient and an integral coefficient according to the characteristics of the automobile, and obtaining a speed difference between a target speed and the current speed; obtaining a proportion correcting coefficient according to the gear state, and obtaining an integral correcting coefficient according to the gear state and the speed difference; obtaining a final proportion coefficient according to the proportion coefficient and the proportion correcting coefficient, and obtaining a final integral coefficient according to the integral coefficient and the integral correcting coefficient; and performing PI control on the driving torque according to the speed difference, the final integral coefficient and the final integral coefficient so as to enable the current speed of the automobile to approach to the target speed. Through the adoption of the control method disclosed by the embodiment of the invention, the driving comfort of a driver can be improved, and the automobile can be prevented from sliding down a slope to a certain degree. The invention further provides the electric automobile.

Description

technical field [0001] The invention relates to the technical field of automobile manufacturing, in particular to a control method of an electric automobile and the electric automobile. Background technique [0002] At present, there are few related technologies about automobile creep function, and the control method used in the related technology of cruise control system is PI (proportional integral, proportional integral) control, and the related technology of vehicle speed control is used in PI control. The anti-saturation coefficient, but there is no dynamic adjustment of the anti-saturation coefficient. [0003] Regarding cruise control, although some related technologies use PI control, the main problem to be solved is different from the creep function. Cruise control is mainly based on the speed required by the driver. Without stepping on the accelerator pedal, the vehicle moves forward at a certain speed to reduce driver fatigue. Driving, and the creep function is m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60W30/02B60W10/08B60W10/06
CPCB60L15/2072B60L2240/12
Inventor 刘营营卢山杨伟斌
Owner BEIJING BORGWARD AUTOMOBILE CO LTD
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