Fuel injection device with oil seal

Details Fuel injection device with oil seal Fuel injection device with oil seal

1999-05-03

2000-10-31

Moulis, Thomas N.

Internal-combustion engines

Charge forming device

With fuel pump

F02M 3304

Patent

active

06138643&

ABSTRACT:
The invention relates to a fuel injection device with an oil seal in which a fuel tank is not soiled by a lubricating oil and a lubricating oil consumption amount is a little. Accordingly, the fuel injection device is provided with a fuel returning annular groove (20) provided between an upper surface of the housing (13) and the pressure chamber (15) and on an inner periphery of the plunger hole (14) and further communicated with the fuel tank, and an oil seal (40) provided between the housing (13) and the plunger (11), thereby preventing a lubricating oil on the upper surface of the housing after lubricating the cam from entering into the fuel returning annular groove.

REFERENCES:
patent: 5259351 (1993-11-01), Rossignol
patent: 5682861 (1997-11-01), Stockner et al.
patent: 5899136 (1999-05-01), Tarr et al.
patent: 5951022 (1999-09-01), Gorman et al.
patent: 6047970 (2000-04-01), Friend et al.

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