Pulse width modulated solenoid purge valve

Details Pulse width modulated solenoid purge valve Pulse width modulated solenoid purge valve

1995-06-06

1997-07-22

Lee, Kevin

Valves and valve actuation

Electrically actuated valve

Including solenoid

25112905, F16K 3106

Patent

active

056496877

ABSTRACT:
A pulse width modulated solenoid purge valve for an on board fuel vapor recovery system of an automotive vehicle is operated by a solenoid that has a pole piece and armature that are shaped to operate at high frequencies. More specifically, the pole piece and the armature have an air gap interface that is defined by a protrusion of one that always intrudes into a recess of the other by a substantial amount to reduce response time of the armature and permit operation of the solenoid at the high frequencies.

REFERENCES:
patent: 4442998 (1984-04-01), Ohyama et al.
patent: 4944276 (1990-07-01), House et al.
patent: 4986246 (1991-01-01), de Vivie et al.
patent: 5237980 (1993-08-01), Gillier
patent: 5326070 (1994-07-01), Baron
patent: 5538219 (1996-07-01), Osterbrink

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