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A method and device for limiting the maximum speed of an electric vehicle

A technology for electric vehicles and maximum speed, applied in electric vehicles, control devices, transportation and packaging, etc., can solve the problem that the maximum speed cannot be automatically limited, and achieve the effect of preventing overspeed

Active Publication Date: 2019-05-28
WEICHAI POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the maximum speed of the existing electric vehicles cannot be automatically limited when driving

Method used

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  • A method and device for limiting the maximum speed of an electric vehicle
  • A method and device for limiting the maximum speed of an electric vehicle
  • A method and device for limiting the maximum speed of an electric vehicle

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Embodiment Construction

[0042] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0043] The vehicle controller of an electric vehicle is the core control component of an electric vehicle. It collects accelerator pedal signals, brake pedal signals, gear signals, motor signals and other component signals, and after making corresponding judgments, controls the various components of the lower layer. The action of the controller. The core idea of ​​the present invention is to control the driving torque of the motor after correspondingly judging...

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Abstract

The invention discloses a maximum speed limitation method and device used for electric cars. Firstly, the driving torque of a motor is limited under a first threshold; then, whether or not the acceleration of an electric car is larger than a third threshold and the speed of the electric car is larger than a forth threshold are determined in real time; if the acceleration is no more than the third threshold and the speed is no more than the fourth threshold, the driving torque of the motor is controlled unchanged; if the acceleration is larger than the third threshold or the speed is larger than the fourth threshold, the driving torque of the motor is reduced; the driving torque of the motor is adjusted in real time according to the speed and the acceleration of the electric car. By means of the method and device of the invention, the maximum speed of an electric car is limited so as to prevent overspeed of electric cars and prevent personal and property loss.

Description

technical field [0001] The invention relates to the technical field of new energy vehicles, and more specifically, to a method and device for limiting the maximum speed of an electric vehicle. Background technique [0002] With the development of society and the further expansion of demand, the energy crisis and increasingly serious environmental pollution are increasingly restricting people's lives. As a pillar industry of the modern economy, the automobile industry is also facing great challenges and tests. Electric vehicles use electric energy as power and directly drive vehicles through motors. They have the advantages of fast speed increase, stable driving, no pollution, and energy saving. They are an effective way to solve energy and environmental problems. However, the maximum speed of an existing electric vehicle cannot be automatically limited when driving. Contents of the invention [0003] In view of this, the present invention proposes a method and device for ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L15/28
CPCB60L15/28B60L2240/12B60L2240/14B60L2240/423B60L2260/44Y02T10/72
Inventor 陈宾娄丙民
Owner WEICHAI POWER CO LTD