A negative pressure abnormality detection apparatus includes a negative pressure sensor to output a signal representing negative pressure in a negative pressure chamber of a brake booster into which intake negative pressure of an intake manifold generated by rotation of an engine is introduced; a negative pressure detection unit to detect the negative pressure based on the signal; an abnormality determination unit to determine whether an abnormality occurs with the negative pressure sensor, based on whether the negative pressure is shifted toward atmospheric or vacuum pressure relative to a threshold, when a state continues for a predetermined time or longer during which the engine rotates and a negative-pressure-expending braking operation is not performed; and a threshold change unit to change the threshold depending on opening of a throttle valve in an intake pipe connected with the intake manifold, while the state continues.


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    Title :

    Negative pressure abnormality detection apparatus, and control apparatus for internal combustion engine


    Contributors:

    Publication date :

    2018-04-17


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    F02N STARTING OF COMBUSTION ENGINES , Anlassen von Brennkraftmaschinen / B60T Bremsanlagen für Fahrzeuge oder Teile davon , VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF



    Negative pressure abnormality detection apparatus and control apparatus for internal combustion engine

    SHIMOSE FUMICHIKA / KATO HIROKAZU / KAKEHI JUNPEI | European Patent Office | 2017

    Free access



    NEGATIVE PRESSURE ABNORMALITY DETECTOR AND INTERNAL COMBUSTION ENGINE CONTROLLER

    SHIMOSE FUMICHIKA / KATO HIROKAZU / KAKEI JUNPEI | European Patent Office | 2016

    Free access

    NEGATIVE PRESSURE ABNORMALITY DETECTOR AND INTERNAL COMBUSTION ENGINE CONTROLLER

    KATO HIROKAZU | European Patent Office | 2016

    Free access