Power plants – Pressure fluid source and motor – Having condition responsive control in a system of distinct...
Patent
1992-04-07
1993-09-07
Look, Edward K.
Power plants
Pressure fluid source and motor
Having condition responsive control in a system of distinct...
60420, 60452, 91518, F16D 3102
Patent
active
052418219
ABSTRACT:
An improved hydraulic system for a vehicle includes a swash plate type variable capacity hydraulic pump that is operably coupled to an engine. A hydraulic motor for driving an air conditioning compressor and a power steering hydraulic mechanism having less fluid demand than that of the hydraulic motor are disposed in a first and a second fluid lines respectively. First, second and third nozzles are disposed within the fluid lines. The volume of fluid controlled by the first nozzle is larger than that of the second nozzle, which is larger than that of the third nozzle. The first fluid line is depressurized by the first nozzle when the hydraulic motor is used, while the second fluid line is depressurized by the second nozzle when the power steering mechanism is used. When neither the hydraulic motor nor the power steering mechanism is used, the pressure in the fluid line on the circulation side is reduced to nearly zero by the third nozzle. The hydraulic cylinder is coupled to a swash plate, and a tracer valve adjusts the quantity of fluid in a hydraulic cylinder to control the inclination angle of the swash plate, as a function of the pressure in the fluid on the hydraulic pump side and the pressure in the depressurized fluid line on the power steering mechanism side.
REFERENCES:
patent: 3579987 (1971-05-01), Busse
patent: 4420935 (1983-12-01), Kobald
patent: 4479349 (1984-10-01), Westveer
patent: 4553389 (1985-11-01), Tischer et al.
patent: 4559778 (1985-12-01), Krusche
patent: 4635440 (1987-01-01), Kropp
patent: 4938023 (1990-07-01), Yoshino
patent: 4966066 (1990-10-01), Kauss et al.
Goto Kunifumi
Hoshino Tatsuyuki
Kabushiki Kaisha Toyoda Jidoshokki Seisakusho
Look Edward K.
Nguyen Hoang
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