Fuel injection system

Details Fuel injection system Fuel injection system

2006-05-09

2006-05-09

Moulis, Thomas (Department: 3747)

Internal-combustion engines

Charge forming device

Fuel injection system

C123S447000

Reexamination Certificate

active

07040288

ABSTRACT:
A booster unit is provided in an injector of a fuel injection system. The booster unit includes a booster piston accommodated in a pressure chamber, and a discharge valve capable of discharging fuel in a backpressure chamber. A needle valve drive unit includes a pressure-receiving piston and an open/close valve. A return passage is connected to a discharge side of the open/close valve. A fuel discharge passage in communication with the discharge valve is combined with the return passage in a confluence portion. A check valve is provided between the confluence portion and the open/close valve. A check valve permits the fuel discharged to the return passage from a pressurization chamber to be directed to the confluence portion, and prevents the fuel discharged to the fuel discharge passage from the backpressure chamber from being directed the open/close valve.

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patent: 2002 539372 (2002-11-01), None
patent: WO 00/55495 (2000-09-01), None

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