Fuel supply system for diesel engine

Details Fuel supply system for diesel engine Fuel supply system for diesel engine

2007-03-23

2009-02-24

Moulis, Thomas N (Department: 3747)

Internal-combustion engines

Charge forming device

With fuel pump

C123S464000, C123S457000

Reexamination Certificate

active

07493893

ABSTRACT:
A fuel supply system is incorporated into a diesel engine including a low-pressure fuel pump2, a high-pressure fuel pump3, a common rail4, fuel injection valves5and a fuel return line14. The fuel supply system reduces the discharge rate of the low-pressure fuel pump2supplying the fuel to the high-pressure fuel pump3when the diesel engine is in an idling state and the temperature of the fuel is below a lower fuel temperature threshold and when the diesel engine is in an idling state and the temperature of the fuel is above an upper fuel temperature threshold. The flow rate of the feed fuel discharged from the low-pressure fuel pump is reduced when an idling state or a specific state where the fuel is at a specific temperature. Thus the fuel line system of the fuel supply system can be built in a lightweight arrangement and the piping of the fuel line system can be simplified.

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