PROBLEM TO BE SOLVED: To provide a failure determination device for a negative pressure operation device in which a failure determination of one of the negative pressure operation devices can be accurately executed in the case that a plurality of negative pressure operation devices are used under a condition of probability of occurrence of variation or lack of negative pressure.SOLUTION: A failure determination device 1 for determining a failure of a compressor and bypass valve 10 of a variable vane mechanism 9c acting as a negative pressure operation device and three valves 10, 14, 15 comprises an ECU 2. The ECU 2 determines whether or not a negative pressure is kept at a prescribed stable state in which the failure determination device can be stably operated on the basis of a vane opening degree αvn [step 23] and in the case that the negative pressure is kept at a prescribed stable state, a supercharger pressure PB detected when it is determined that the fixed state of the compressor and bypass valve 10 is released is used to determine the failure of the compressor and bypass valve 10 [steps 1 to 10]SELECTED DRAWING: Figure 3
【課題】複数の負圧作動装置を負圧の変動又は不足が生じる可能性がある条件下で使用する場合において、そのうちの1つの負圧作動装置の故障判定を精度よく実行することができる負圧作動装置の故障判定装置を提供する。【解決手段】負圧作動装置としての可変ベーン機構9c及び3つの弁10,14,15のうちのコンプレッサ・バイパス弁10の故障を判定する故障判定装置1は、ECU2を備える。ECU2は、ベーン開度αvnに基づいて、負圧が負圧作動装置が安定して作動可能な所定安定状態にあるか否かを判定し(ステップ23)、負圧が所定安定状態にあると判定されている場合において、コンプレッサ・バイパス弁10の固着状態が解除されていると判定されているときに検出された過給圧PBを用いて、コンプレッサ・バイパス弁10の故障を判定する(ステップ1〜10)。【選択図】図3
FAILURE DETERMINATION DEVICE FOR NEGATIVE PRESSURE OPERATION DEVICE
負圧作動装置の故障判定装置
2016-05-23
Patent
Electronic Resource
Japanese
FIXATION FAILURE DETERMINATION DEVICE FOR BRAKE NEGATIVE PRESSURE SENSOR
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