Hybrid powertrain with valve assembly for dual pumps

Details Hybrid powertrain with valve assembly for dual pumps Hybrid powertrain with valve assembly for dual pumps

2006-02-27

2008-08-26

Leslie, Michael (Department: 3745)

Power plants

Pressure fluid source and motor

Having condition responsive control in a system of...

C137S114000, C137S512500

Reexamination Certificate

active

07415820

ABSTRACT:
A powertrain includes a first pump and a second pump. A conduit defines a passageway for providing hydraulic pressure from the first pump or the second pump to a transmission. A valve assembly is configured to selectively supply hydraulic pressure to the passageway solely from the first pump, solely from the second pump, and from both the first and second pumps. The valve assembly thus enables the first and second pump to augment one another, thereby enabling the size of at least one of the pumps to be smaller than would otherwise be possible without the valve assembly.

REFERENCES:
patent: 3882678 (1975-05-01), Fassbender
patent: 4368752 (1983-01-01), Tamamori et al.
patent: 4445818 (1984-05-01), Ohsaki et al.
patent: 7121266 (2006-10-01), Powell
patent: 2329328 (1975-01-01), None
patent: 3206353 (1982-09-01), None

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