PROBLEM TO BE SOLVED: To suppress the insufficiency of brake negative pressure even if sufficient pump negative pressure cannot be obtained due to a failure of a vacuum pump 5 when an engine 1 comprises a port injection injector 13 and an in-cylinder injection injector 14.SOLUTION: When it is determined that negative pressure in a negative pressure chamber 26 of a brake booster 2 becomes insufficient with respect to a brake requirement (YES at step ST2: determination means), a ratio of a fuel injection amount by a port injection injector 13 is reduced, control by a fuel injection control part 100b is corrected so that a ratio of a fuel injection amount by an in-cylinder injection injector 14 is increased (step ST4: fuel ratio correction means), and control by a throttle control part 100a is corrected so that an opening of a throttle valve 12 becomes small (step ST7: throttle correction control means).SELECTED DRAWING: Figure 4

    【課題】エンジン1がポート噴射インジェクタ13および筒内噴射インジェクタ14を備えている場合に、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、ブレーキ負圧の不足を抑制する。【解決手段】ブレーキブースタ2の負圧室26における負圧がブレーキ要求に対して不足することを判定すれば(ステップST2でYES:判定手段)、ポート噴射インジェクタ13による燃料噴射量の比率が減少し、筒内噴射インジェクタ14による燃料噴射量の比率が増大するように、燃料噴射制御部100bによる制御を補正し(ステップST4:燃料比率補正手段)、スロットルバルブ12の開度が小さくなるように、スロットル制御部100aによる制御を補正する(ステップST7:スロットル補正制御手段)。【選択図】図4


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    Title :

    BRAKE NEGATIVE PRESSURE CONTROL DEVICE OF VEHICLE


    Additional title:

    車両のブレーキ負圧制御装置


    Contributors:

    Publication date :

    2017-06-22


    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



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