Electromagnetic valve for opening or closing fluid passage

Details Electromagnetic valve for opening or closing fluid passage Electromagnetic valve for opening or closing fluid passage

1994-12-02

1995-12-19

Miller, Carl S.

Internal-combustion engines

Charge forming device

Fuel injection system

25112916, 335279, 335263, F02M 4100

Patent

active

054760798

ABSTRACT:
An electromagnetic valve opens and closes a fuel return passage (23, 24) of a fuel injection pump, to control a time of fuel return when fuel compressed by a plunger (12) of the fuel injection pump is overflowed from a high-pressure fuel chamber (19) to a low-pressure fuel chamber (11). A valve needle (36) causes a reciprocative movement in an axial direction thereof to open or close the fuel return passage (23, 24). A terminal (46), supplying electric current to the electromagnetic valve, is disposed along the axial direction of the valve needle (36). A plate-like armature (43), connected to one end of the valve needle (36), has a through hole (43a) allowing the terminal (46) to enter therein and causing a reciprocative movement together with the valve needle (36). The outer periphery of the armature (43) extends radially further than the terminal (46). A coil (44), connected to the terminal (46), is disposed in confronting relation to a side surface of the armature (43) located adjacent to the valve needle (36).

REFERENCES:
patent: 3281741 (1966-10-01), Beliueau
patent: 3842809 (1974-10-01), Kiwc
patent: 4653455 (1987-03-01), Eblen et al.
patent: 4690373 (1987-09-01), Linder
patent: 4690374 (1987-09-01), Polach
patent: 4750514 (1988-06-01), Omori
patent: 4753212 (1988-06-01), Miyashi
patent: 4832312 (1989-05-01), Linder
patent: 5239968 (1993-08-01), Rodriguez-Amaya et al.
patent: 5244180 (1993-09-01), Wakeman
patent: 5277163 (1994-01-01), Ohishi
patent: 5315278 (1994-05-01), Demere
patent: 5347970 (1994-09-01), Pape

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