Power plants – Pressure fluid source and motor – Having condition responsive control in a system of distinct...
Patent
1991-05-29
1992-07-07
Look, Edward K.
Power plants
Pressure fluid source and motor
Having condition responsive control in a system of distinct...
60452, 91514, 91532, 417222R, F16D 3102
Patent
active
051272261
ABSTRACT:
A hydraulic apparatus for an industrial vehicle adapted for enabling to carry out a pump capacity control whenever necessary, and including a variable capacity type hydraulic pump driven by an engine, a flow dividing valve disposed in an outlet pipe line of the pump and adapted for dividing a flow of a pressurized hydraulic oil into a flow required for a power steering hydraulic circuit and a balance flow for a cargo handling hydraulic circuit, a switching valve pilot-operated by a pressure of the cargo handling hydraulic circuit and adapted for selecting a supply pilot pressure between a pressure of the power steering hydraulic circuit downstream with respect to the flow dividing valve and a pressure of the outlet pipe line upstream with respect to the flow dividing valve, and a capacity control valve pilot-operated by a differential pressure between the supply pilot pressure and the pressure of the outlet pipe line and adapted for controlling a capacity varying mechanism of the pump. The hydraulic apparatus can not only inhibit the power loss and improve the fuel consumption, but also it can inhibit the oil temperature from increasing very effectively.
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patent: 4276810 (1981-07-01), Zeuner et al.
patent: 4420935 (1983-12-01), Kobald
patent: 4523430 (1985-05-01), Masuda
patent: 4553904 (1985-11-01), Ruseff et al.
patent: 4938023 (1990-07-01), Yoshino
patent: 4976106 (1990-12-01), Noeskau et al.
Goto Kunifumi
Minami Wataru
Suzuki Shigeru
Kabushiki Kaisha Toyoda Jidoshokki Seisakusho
Look Edward K.
Nguyen Hoang
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