Regulated linear purge solenoid valve

Details Regulated linear purge solenoid valve Regulated linear purge solenoid valve

2005-01-25

2005-01-25

Miller, Carl S. (Department: 3747)

Internal-combustion engines

Charge forming device

Fuel injection system

C123S516000, C251S129150

Reexamination Certificate

active

06845755

ABSTRACT:
A pressure regulator is associated with a solenoid-operated valve that is operated by a pulse waveform at a fundamental frequency substantially greater than the frequency response of the valve mechanism. This substantially attenuates solenoid pulsations and applies a predetermined pressure differential across the valve mechanism to accomplish improved flow control accuracy. The invention is especially advantageous for purging fuel vapor to an intake manifold of an internal combustion engine of an automotive vehicle.

REFERENCES:
patent: 4002318 (1977-01-01), Koch
patent: 4362185 (1982-12-01), Kadner
patent: 5538220 (1996-07-01), LaMarca
patent: 5649687 (1997-07-01), Rosas et al.
patent: 5970958 (1999-10-01), DeLand et al.
patent: 6050245 (2000-04-01), Cook et al.

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