PROBLEM TO BE SOLVED: To secure a brake negative pressure even when a sufficient pump negative pressure cannot be obtained due to failure of a vacuum pump 5 in supply of an intake negative pressure of an engine 1 mounted on a vehicle and a negative pressure (pump negative pressure) of the vacuum pump 5 to a brake booster 2.SOLUTION: An end of a first negative pressure passage 15 for supplying an intake negative pressure to a negative pressure chamber 26 of a brake booster 2 is connected between a throttle valve 13 and a flow strengthening valve (SCV 14) on the downstream side. When a vacuum pump 5 fails (step ST2; Yes) and a pump negative pressure is insufficient, the throttle valve 13 and the SCV 14 are respectively operated to the close side (steps ST4, ST5), and the intake negative pressure is increased.SELECTED DRAWING: Figure 3

    【課題】車両に搭載されたエンジン1の吸気負圧とバキュームポンプ5の負圧(ポンプ負圧)とをブレーキブースタ2に供給する場合に、バキュームポンプ5の故障によって十分なポンプ負圧が得られなくなっても、ブレーキ負圧を確保できるようにする。【解決手段】ブレーキブースタ2の負圧室26に吸気負圧を供給する第1の負圧通路15の端部を、スロットルバルブ13とその下流側の流動強化バルブ(SCV14)との間に接続する。バキュームポンプ5が故障して(ステップST2でYES)、ポンプ負圧が不足するときには、スロットルバルブ13およびSCV14をそれぞれ閉じ側に動作させて(ステップST4,ST5)、吸気負圧を増大させる。【選択図】図3


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    Title :

    BRAKE NEGATIVE PRESSURE CONTROL DEVICE FOR VEHICLE


    Additional title:

    車両のブレーキ負圧制御装置


    Contributors:

    Publication date :

    2017-06-01


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    F02D CONTROLLING COMBUSTION ENGINES , Steuern oder Regeln von Brennkraftmaschinen / B60T Bremsanlagen für Fahrzeuge oder Teile davon , VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF / F02B INTERNAL-COMBUSTION PISTON ENGINES , Brennkraftmaschinen mit innerer Verbrennung mit Verdrängerwirkung / F02M Zuführen von Brennstoff-Luft-Gemischen oder deren Bestandteilen bei Brennkraftmaschinen allgemein , SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF



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