Fuel injection system with employing vane type fuel pump

Details Fuel injection system with employing vane type fuel pump Fuel injection system with employing vane type fuel pump

1995-09-08

1997-05-20

Miller, Carl S.

Internal-combustion engines

Charge forming device

Fuel injection system

123497, 417308, 417366, F02M 4100, F04B 4900

Patent

active

056303998

ABSTRACT:
A fuel injection system includes a vane-type fuel pump. The fuel pump has a first bypass passage with a first pressure relief valve for relieving pressurized fuel from a discharge passage downstream of a check valve to the discharge passage upstream of the check valve so that excess pressure in the discharge passage downstream of the check valve can be relieved to the discharge pressure upstream of the check valve. Therefore, fuel leakage through a fuel injection valve can be prevented for avoiding possibility of formation of overrich mixture even upon hot start condition.

REFERENCES:
patent: 4400139 (1983-08-01), Masuda
patent: 4920942 (1990-05-01), Fujimuri
patent: 5039284 (1991-08-01), Talaski
patent: 5120201 (1992-06-01), Tuckey
patent: 5131822 (1992-07-01), Yamamoto
patent: 5148792 (1992-09-01), Tuckey
patent: 5339785 (1994-08-01), Wilksch
patent: 5361742 (1994-11-01), Briggs
patent: 5406922 (1995-04-01), Tuckey
patent: 5477829 (1995-12-01), Hassinger
patent: 5478213 (1995-12-01), Harris

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