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Method, system and vehicle for calculating vehicle speed of electric vehicle

A technology of electric vehicles and calculation methods, which is applied to vehicle components, circuits or fluid pipelines, transportation and packaging, etc., can solve the problems of low accuracy and reliability of vehicle speed, inconsistency, etc., and achieve the accuracy and reliability of calculation results high effect

Active Publication Date: 2019-11-22
BORGWARD AUTOMOTIVE CHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the vehicle accelerates rapidly and the wheel slips or the wheel locks in emergency braking, and the wheels appear to slide and roll simultaneously, the calculated result of the vehicle speed will not match the actual value of the vehicle speed, that is, the accuracy and reliability of the obtained vehicle speed are not accurate. high

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  • Method, system and vehicle for calculating vehicle speed of electric vehicle
  • Method, system and vehicle for calculating vehicle speed of electric vehicle
  • Method, system and vehicle for calculating vehicle speed of electric vehicle

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Embodiment Construction

[0040] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the drawings are exemplary, and are only used to explain the present invention, but should not be understood as limiting the present invention.

[0041] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientation or positional relationship indicated by "vertical", "horizontal", "top", "bottom", "inner", "outer" etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and The description is simplified, rather than indicating or i...

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Abstract

The invention provides a vehicle speed calculating method and system of an electric vehicle and the vehicle. The method includes the following steps of determining the current driving mode of the vehicle according to the collected brake pedal signal, accelerator pedal signal and ABS signal of the vehicle, the rotating speed of four wheels and the rotating speed of a motor, wherein the driving modeat least includes the emergency brake mode and the wheel slip mode; if the vehicle is in the wheel slip mode, executing a first calculating strategy to obtain the actual vehicle speed of the vehicle;if the vehicle is in the emergency brake mode, executing a second calculating strategy to obtain the actual vehicle speed of the vehicle. By means of the method, the actual vehicle speed of the vehicle can be rapidly and effectively calculated, and the calculating result is high in accuracy and reliability.

Description

Technical field [0001] The present invention relates to the field of automobile technology, in particular to a vehicle speed calculation method, system and vehicle for an electric automobile. Background technique [0002] When calculating the speed of a pure electric vehicle, the current vehicle speed is usually determined according to the current vehicle's motor speed (or wheel speed), reduction ratio, wheel radius and other parameters. However, when the vehicle is rapidly accelerating, the wheels are slipping or the wheels are locked due to emergency braking, and the wheels are slipping and rolling, which will cause the speed calculation result to be inconsistent with the actual speed value, that is, the accuracy and reliability of the obtained speed high. Summary of the invention [0003] The present invention aims to solve at least one of the above technical problems. [0004] To this end, an object of the present invention is to propose a vehicle speed calculation method for ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60W40/00B60R16/023
Inventor 黄伟伟
Owner BORGWARD AUTOMOTIVE CHINA CO LTD