The invention provides a motormeter overspeed alarm method and system, is applied to motormeters, and relates to the technical field of engine rotating speed early warning. The method comprises the steps that the current highest rotating speed value and the current actual rotating speed value of an engine are obtained; determining a current rotating speed difference value according to the current maximum rotating speed value and the current actual rotating speed value; when the current rotating speed difference value meets the preset rotating speed condition, first-stage alarm of an instrument is started, and the hydraulic retarder is activated; the maximum rotating speed value after the engine activates the hydrodynamic retarder and the actual rotating speed value after the engine activates the hydrodynamic retarder are obtained; according to the maximum rotating speed value of the engine after the hydraulic retarder is activated and the actual rotating speed value of the engine after the hydraulic retarder is activated, the rotating speed difference value after the hydraulic retarder is activated is determined; and when the rotating speed difference value after the hydraulic retarder is activated is larger than the preset rotating speed condition, an instrument second-stage alarm is started, and in-cylinder braking is activated. According to the invention, the overspeed alarm function of the automobile instrument can be ensured to be universal among different engines.

    本发明提供一种汽车仪表超速报警方法及系统,应用于汽车仪表,涉及发动机转速预警技术领域,该方法包括:获取发动机的当前最高转速值和当前实际转速值;根据当前最高转速值和当前实际转速值确定当前转速差值;当当前转速差值满足预设转速条件时,启动仪表第一级警报并激活液力缓速器;获取发动机激活液力缓速器后的最高转速值和激活液力缓速器后的实际转速值;根据发动机激活液力缓速器后的最高转速值和激活液力缓速器后的实际转速值确定激活液力缓速器后的转速差值;当激活液力缓速器后的转速差值大于预设转速条件时,启动仪表第二级警报并激活缸内制动。本发明能够保证汽车仪表的超速报警功能在不同的发动机之间通用。


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    Title :

    Automobile instrument overspeed alarm method and system


    Additional title:

    汽车仪表超速报警方法及系统


    Contributors:
    LONG LIHUA (author) / ZHOU YOU (author) / LI ZHIQIANG (author)

    Publication date :

    2023-11-10


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES



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