Power plants – Pressure fluid source and motor – Coaxial impeller and turbine unit
Patent
1979-06-26
1980-12-16
Cohen, Irwin C.
Power plants
Pressure fluid source and motor
Coaxial impeller and turbine unit
60337, 60358, 60456, 60458, 192 4C, F16D 3300
Patent
active
042389291
ABSTRACT:
The present invention relates to an arrangement to cool oil used in a hydraulic control system of an automatic transmission for an industrial vehicle. The hydraulic control system includes an operating pressure feed line, a pressure regulator valve to regulate the magnitude of pressure in the operating pressure feed line, feed passage means for feeding oil under pressure from the operating pressure feed line to a hydrokinetic torque converter, exhaust passage means for exhausting the oil from the torque converter, a pressure maintaining valve disposed in the exhaust passage means to maintain the magnitude of pressure within the torque converter to a predetermined level, and a lubricating oil feed line communicating with the exhaust passage means via the pressure maintaining valve and also with a lubricating oil port of the pressure regulator valve via a flow restrictor. The lubricating oil feed lines have two portions which may be subjected to cooling. The two portions are parallel to each other and lead from said exhaust passage means and from said lubricating oil port, respectively.
REFERENCES:
patent: 2638746 (1953-05-01), Kelley
patent: 3631948 (1972-01-01), Ishikawa
patent: 4096693 (1978-06-01), Kawamoto
patent: 4147242 (1979-04-01), Fujioka
Cohen Irwin C.
Nissan Motor Company Limited
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