PROBLEM TO BE SOLVED: To make it possible to ensure that a vacuum pump stops operating even when a vehicle is present in a location at a low atmospheric temperature.SOLUTION: A pump ECU starts actuating a vacuum pump when a booster negative pressure ΔP is not higher than a pump-actuation start threshold ΔPstart (S11 to S13). The pump ECU calculates a negative-pressure increase gradient ΔP' that represents the increase gradient of the booster negative pressure ΔP, and stops actuating the vacuum pump when the negative-pressure increase gradient ΔP' is not greater than a stop gradient threshold ΔP'stop (S14 to S17).SELECTED DRAWING: Figure 2

    【課題】 車両が大気圧の低い場所にいる場合でも、確実にバキュームポンプの作動を停止させることができるようにする。【解決手段】 ポンプECUは、ブースタ負圧ΔPがポンプ作動開始閾値ΔPstart以下になるとバキュームポンプの作動を開始させる(S11〜S13)。ポンプECUは、ブースタ負圧ΔPの増加勾配を表す負圧増加勾配ΔP’を演算し、負圧増加勾配ΔP’が停止勾配閾値ΔP’stop以下になったときに、バキュームポンプの作動を停止させる(S14〜S17)。【選択図】 図2


    Access

    Download


    Export, share and cite



    Title :

    ELECTRIC VACUUM PUMP CONTROL UNIT


    Additional title:

    電動式バキュームポンプの制御装置


    Contributors:

    Publication date :

    2016-04-04


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B60T Bremsanlagen für Fahrzeuge oder Teile davon , VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF / F04B Verdrängerkraft- und Verdrängerarbeitsmaschinen für Flüssigkeiten , POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS



    ELECTRIC VACUUM PUMP CONTROL APPARATUS AND ELECTRIC VACUUM PUMP CONTROL METHOD

    TANG WENSHAN | European Patent Office | 2018

    Free access

    ELECTRIC VACUUM PUMP CONTROL APPARATUS AND ELECTRIC VACUUM PUMP CONTROL METHOD

    TANG WENSHAN | European Patent Office | 2019

    Free access



    ELECTRIC VACUUM PUMP

    European Patent Office | 2017

    Free access