192 clutches and power-stop control – Vortex-flow drive and clutch – Including drive-lockup clutch
Patent
1998-07-08
2000-05-02
Bonck, Rodney H.
192 clutches and power-stop control
Vortex-flow drive and clutch
Including drive-lockup clutch
F16H 4502
Patent
active
060560940
ABSTRACT:
A hydraulic control device controls hydraulic fluid for shifting an automatic transmission by a pressure control valve, and supplies operating hydraulic fluid diverted from the pressure control valve via a torque converter pressure passage to a lock up clutch of the torque converter. A lubrication passage which lubricates the automatic transmission is connected via an orifice to a torque converter pressure passage, and the pressure in this torque converter pressure passage is limited by a regulator valve to a predetermined upper limit value. Further, there is included a bypass valve which directly supplies hydraulic fluid from the torque converter pressure passage via the orifice to the lubrication passage when the pressure in the torque converter pressure passage rises above a predetermined pressure. On the one hand, at times of low speed vehicle operation, the engagement pressure for the lock up clutch is ensured by the orifice, while also at times of high load the amount of lubrication hydraulic fluid is increased by the bypass valve.
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Bonck Rodney H.
Nissan Motor Co,. Ltd.
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