OIL PRESSURE CONTROL DEVICE

• Main Authors: ONO HISASHI, NISHIDA YUKI, OKAZAWA SHINGO
• Format: Patent
• Language: English; Japanese
• Published: 09.02.2017
• Subjects: BLASTING; CRANKCASE VENTILATING; ENGINE PLANTS IN GENERAL; HEATING; LIGHTING; LUBRICATING INTERNAL COMBUSTION ENGINES; LUBRICATING OF MACHINES OR ENGINES IN GENERAL; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; STEAM ENGINES; WEAPONS

PROBLEM TO BE SOLVED: To provide an oil pressure control device enabled to determine the abnormality of a diversion valve (OSV5) for switching the feed and shutdown of oil to a predetermined hydraulic device (e.g., a piston jet nozzle 15) without causing cost increase, in the case where the oil pressure is feedback-controlled by hydraulic varying means (e.g., a capacity variable mechanism of an oil pump 3) in accordance with the detected value of oil pressure by arranging the oil supply system 2 of an engine 1 with a hydraulic sensor 105.SOLUTION: Abnormality determining means switches (at Step 204) an OSV 5 into a feed or shutdown state while the feedback control of an oil pressure being inhibited (at Step ST203), and it is decided (at Step ST206) that the OSV5 is abnormal, in the case where the change of the detection value of the resultant oil pressure is at or lower than a predetermined value (NO at Step ST205).SELECTED DRAWING: Figure 5 【課題】エンジン１のオイル供給系２に油圧センサ１０５を配設し、油圧の検出値に応じて油圧可変手段（例えばオイルポンプ３の容量可変機構）により、油圧をフィードバック制御するようにした場合に、所定の油圧デバイス（例えばピストンジェットノズル１５）へのオイルの供給、遮断を切り換える切換バルブ（ＯＳＶ５）の異常を、コスト高を招くことなく判定できるようにする。【解決手段】異常判定手段は、油圧のフィードバック制御を禁止した状態で（ステップＳＴ２０３）、ＯＳＶ５を供給または遮断のいずれかの状態に切り換えて（ステップＳＴ２０４）、これによる油圧の検出値の変化が所定以下の場合に（ステップＳＴ２０５でＮＯ）、ＯＳＶ５に異常があると判定する（ステップＳＴ２０６）。【選択図】図５