Fuel supply system having fuel filter installed downstream...

Details Fuel supply system having fuel filter installed downstream... Fuel supply system having fuel filter installed downstream...

2008-12-03

2009-12-22

Cronin, Stephen K (Department: 3747)

Internal-combustion engines

Charge forming device

Fuel injection system

C123S446000, C123S447000, C123S506000, C123S511000, C123S510000

Reexamination Certificate

active

07634986

ABSTRACT:
A fuel supply system for delivering fuel to, for example, a common rail of a diesel engine fuel injection system. The fuel supply system includes a priming pump, a feed pump, a fuel filter disposed downstream of the feed pump, a return path, and a return valve. When the pressure of the fuel between the feed pump and the fuel filter exceeds a first set pressure, the return valve is placed in a first open position to open the return path to return the fuel from downstream to upstream of the feed pump. When the pressure of the fuel, as fed by the priming pump, exceeds a second set pressure, the return valve is placed in a second open position to open the return path to direct the fuel, as fed by the priming pump, to upstream of the fuel filter to prime the fuel filter directly.

REFERENCES:
patent: 5918578 (1999-07-01), Oda
patent: 6058912 (2000-05-01), Rembold et al.
patent: 6234148 (2001-05-01), Hartke et al.
patent: 6609500 (2003-08-01), Ricco et al.
patent: 7343901 (2008-03-01), Mori et al.
patent: 2008/0156295 (2008-07-01), Suzuki et al.
patent: 2008-180208 (2008-08-01), None

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