Electromagnetic valve control device and method

Details Electromagnetic valve control device and method Electromagnetic valve control device and method

2006-06-06

2006-06-06

Lee, Kevin (Department: 3753)

Fluid handling

Processes

C137S552000, C137S553000, C251S129010, C251S129150, C251S064000, C303S119200

Reexamination Certificate

active

07055539

ABSTRACT:
A normally closed electromagnetic valve is closed again after temporarily being opened during an abnormality check of the valve. When the valve is opened, electricity is supplied so that a plunger is moved by a coil but a back face of the plunger does not abut against a receiving face of a fixed portion. Because the plunger does not strike the fixed portion, no impact noise is generated. Also, when the valve is closed, the electricity is not instantly dropped to zero, but is gradually reduced. As a result, impact noise when the valve strikes the valve seat is able to be reduced.

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patent: A 2001-349461 (2001-12-01), None

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