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Dynamic torque control method and system of electric vehicle

An electric vehicle and control method technology, applied in the automotive field, can solve the problems of poor power and comfort, and achieve the effect of comprehensive power

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

AI Technical Summary

Problems solved by technology

The method can solve the problem of poor dynamics and comfort caused by torque changing at a fixed value

Method used

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  • Dynamic torque control method and system of electric vehicle
  • Dynamic torque control method and system of electric vehicle
  • Dynamic torque control method and system of electric vehicle

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Embodiment Construction

[0034] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote 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.

[0035] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner" and "outer" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and Simplified descriptions, rather than indicating or implying that the device or e...

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Abstract

The invention proposes a dynamic torque control method and system of an electric vehicle, wherein the method comprises the steps of: obtaining the acceleration pedal openness, the acceleration pedal change rate, the vehicle speed and the motor rotating speed to obtain the real-time torque; determining the target rotating speed according to the acceleration pedal openness, the vehicle speed or the motor rotating speed, judging if the real-time torque satisfies preset conditions through the target torque; and obtaining the torque variation changed with the acceleration pedal openness and the acceleration pedal change rate to determine the sent torque sent to the motor according to the real-time torque and the torque variation when the real-time torque satisfies the preset conditions. The dynamic torque control method of the electric vehicle, proposed by the embodiment of the invention, selectively controls the torque increment or decrement speed through the torque variation changed with the acceleration pedal openness and the acceleration pedal change rate to synthesize the dynamic property, the comfort and the safety.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a method and system for controlling dynamic torque of electric vehicles. Background technique [0002] When riding an electric car or an urban rail vehicle, there will be shaking and other uncomfortable feelings during the starting stage, which is caused by the characteristics of the motor torque. [0003] In the past, the torque analysis of electric vehicles was based on the pedal opening, motor speed or vehicle speed, and interpolated to determine the target torque of the motor. Then filter the target torque and send it to the motor controller. The purpose of torque filtering is to make the torque sent to the motor increase smoothly. [0004] However, in the prior art, when the target torque is filtered, it only increases or decreases with a fixed value or a fixed variable value, so the driver or passengers feel uncomfortable when the torque is increased too fast at the st...

Claims

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Application Information

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IPC IPC(8): B60L15/20
CPCY02T10/72
Inventor 杨伟斌
Owner BEIJING BORGWARD AUTOMOBILE CO LTD
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