Fluid supply system for vehicles

Details Fluid supply system for vehicles Fluid supply system for vehicles

1990-11-14

1991-12-03

Look, Edward K.

Power plants

Pressure fluid source and motor

Having a mechanical clutch or brake device in the power train

60464, 60475, 60494, 60486, 60484, 60488, 60426, F16D 3102

Patent

active

050690370

ABSTRACT:
A single hydraulic pump (6) is employed in a vehicle for supplementing fluid to a hydrostatic transmission (1) and for supplying fluid to a fluid-operated clutch (2) and to high pressure-actuated hydraulic actuators (3, 4, 5). Fluid discharge path (7) of the pump is connected to the hydrostatic transmission through a pressure-reducing valve (8). Fluid drain path (9) of the reducing valve is fashioned to a fluid supply path for the clutch. A second fluid supply path (11) is connected to the discharge path for supplying fluid to the hydraulic actuators and include a relief valve (12) or orifice (12A) for maintaining fluid pressure in the discharge path higher than the output pressure of the reducing valve. A high pressure relief valve (10) for establishing fluid pressure to be applied to the actuators is connected to the discharge path for minimizing a discharge pressure required to the pump.

REFERENCES:
patent: 3908377 (1975-09-01), Riedhammer
patent: 3952511 (1976-04-01), Turner et al.
patent: 4015482 (1977-04-01), Ito et al.
patent: 4495767 (1985-01-01), Akiyama et al.
patent: 4543786 (1985-10-01), Shuler
patent: 4621495 (1986-11-01), Hedlund
patent: 4731998 (1988-03-01), Maesaka et al.
patent: 4962644 (1990-10-01), Polacek
patent: 4986071 (1991-01-01), Voss et al.

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