PROBLEM TO BE SOLVED: To prevent a vehicle driver and passenger from recognizing the operation noise of an on-off valve such as a solenoid valve in a drive force distribution device having a hydraulic-pressure sealed-type hydraulic-pressure control apparatus.SOLUTION: In a drive force distribution device in which an oil pump is driven with a solenoid valve closed so as to stop driving the oil pump after hydraulic pressure detected with a hydraulic-pressure sensor reaches target hydraulic pressure, thereby maintaining fastening force of a hydraulic clutch with hydraulic pressure of a hydraulic oil until the solenoid valve is opened, the hydraulic oil introduced into an oil channel, the solenoid valve is closed in a case where hydraulic pressure P detected with the hydraulic-pressure sensor is equal to or less than a predetermined hydraulic-pressure threshold, with a vehicular speed V detected with a vehicular speed sensor equaling to or less than a vehicular speed threshold, thus preventing an accelerator operation of a driver synchronizing with an operation of closing the solenoid valve.SELECTED DRAWING: Figure 9
【課題】油圧封入式の油圧制御装置を備える駆動力配分装置において、車両の運転者や同乗者にソレノイド弁などの開閉弁の動作音を認識され難くする。【解決手段】ソレノイド弁を閉じてオイルポンプを駆動することで、油圧センサで検出した油圧が目標油圧に達した後、オイルポンプの駆動を停止することで、ソレノイド弁を開くまでの間、油路に封入した作動油の油圧で油圧クラッチの締結力が維持されるように構成した駆動力配分装置において、油圧センサで検出した油圧Pが予め定めた閾値油圧以下、且つ車速センサで検出した車速Vが予め定めた閾値車速以下のときにソレノイド弁を閉じる。これにより、運転者のアクセル操作とソレノイド弁を閉じる動作が同調することを防止する。【選択図】図9
HYDRAULIC-PRESSURE CONTROL APPARATUS FOR DRIVE FORCE DISTRIBUTION DEVICE
駆動力配分装置の油圧制御装置
12.01.2017
Patent
Elektronische Ressource
Japanisch
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