Solenoid spool valve

Details Solenoid spool valve Solenoid spool valve

2006-11-07

2006-11-07

Denion, Thomas (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

C123S090150, C123S090310, C137S625650, C137S625640

Reexamination Certificate

active

07131410

ABSTRACT:
A solenoid spool valve includes a spool valve, a spring, and an electromagnetic actuator. The spool valve has a generally cylindrical sleeve provided with a fluid input port and a fluid output port and a spool supported in the sleeve for axial displacement to switch between said input and output ports. The spring abuts a first working face of said spool to energize said spool in a first axial direction. The electromagnetic actuator provides an axial drive force to a second working face of said spool in a second axial direction that is substantially opposite to said first axial direction. The first and second working faces are disposed axially inside of both axial end portions of a bearing, respectively, for slidably supporting said spool in said sleeve.

REFERENCES:
patent: 4587991 (1986-05-01), Chorkey
patent: 6308672 (2001-10-01), Lichti et al.
patent: 2001-108135 (2001-04-01), None

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