Electromagnetic valve for brake control

Details Electromagnetic valve for brake control Electromagnetic valve for brake control

2006-08-17

2008-10-21

Fristoe, Jr., John K (Department: 3753)

Valves and valve actuation

Electrically actuated valve

Having means to produce proportional flow

C251S129150, C303S119100

Reexamination Certificate

active

07438276

ABSTRACT:
In a pressure increase control valve, the size of a gap G between a plunger and a guide is 0.2 mm or greater, or a ratio between a diameter of a restriction and a seat diameter ds is 0.9 or less. Setting the size of the gap between the plunger and the guide to 0.2 mm or greater can decrease variations in an electromagnetic force with respect to a stroke of a valve body. In addition, setting the ratio between the diameter do of the restriction and the seat diameter to 0.9 or less can increase variations in a fluid force with respect to the stroke of the valve body. Therefore, it is easier to achieve a relationship between the electromagnetic force and a resistance force that is required in order to enable linear control of a differential pressure amount generated between upstream and downstream flows.

REFERENCES:
patent: 6092781 (2000-07-01), Hohl et al.
patent: 6113066 (2000-09-01), Hohl et al.
patent: 6705589 (2004-03-01), Hofmann et al.
patent: A-55-063809 (1980-05-01), None

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