Hydraulic system for utility vehicles, in particular...

Details Hydraulic system for utility vehicles, in particular... Hydraulic system for utility vehicles, in particular...

2008-07-08

2008-07-08

Leslie, Michael (Department: 3745)

Power plants

Pressure fluid source and motor

Condition responsive control of pump or motor displacement

C060S422000

Reexamination Certificate

active

07395664

ABSTRACT:
Disclosed is a hydraulic system for utility vehicles, in particular agricultural tractors, for supplying primary and/or auxiliary pressure medium consumers (6, 11, 12) with pressure medium, comprising a pump (1), whose pressure and flow are controlled as a function of the load pressure of the pressure medium consumers by a pressure and flow controller (13) to which whenever auxiliary pressure medium consumers (11, 12) are operating, a higher load pressure compared to the actual load pressure is reported through an amplifier device. In order to obtain rapid response of an actuated auxiliary pressure medium consumer it is proposed that the amplifier device (29) consists of a proportionally controllable pressure reducing valve (39).

REFERENCES:
patent: 6105367 (2000-08-01), Tsuruga et al.
patent: 6314729 (2001-11-01), Crull et al.
patent: 6644025 (2003-11-01), Oberhausser et al.
patent: 6874318 (2005-04-01), MacLeod

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