Hydraulic system for responsive splitting of engine power

Details Hydraulic system for responsive splitting of engine power Hydraulic system for responsive splitting of engine power

1980-05-27

1982-11-16

Pekar, John A.

Motor vehicles

Power

Including traction motor of kind driven by noncompressible...

60428, 60447, 417216, B60K 1710

Patent

active

043591302

ABSTRACT:
A hydraulic system for a vehicle having an engine (10) governed to run within a predetermined speed range; the engine (10) arranged to drive a motive power train (11), a charge pump (14), a variable displacement pump (12) and a fixed displacement pump (15). The variable and fixed pumps (12 and 15) are arranged to supply hydraulic fluid pressure to a work circuit (26). A flow signal is created by passing the output from the charge pump (14) through an orifice (40), which signal is routed to a speed valve (46) which directs fluid to a control ram (78) to reduce the displacement of the pump (15) during a predetermined intermediate portion of said speed range.

REFERENCES:
patent: 3543508 (1970-12-01), Schwab
patent: 3962870 (1976-06-01), Lech
patent: 3963378 (1976-06-01), McMillan
patent: 3985472 (1976-10-01), Virtue et al.
patent: 4203712 (1980-05-01), Vehara

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