Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1985-11-12
1987-05-26
Butler, Douglas C.
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
251227, 25112902, 25112921, 303116, 303 69, B60T 802
Patent
active
046680241
ABSTRACT:
A hydraulic control device for an anti-skid brake system for a vehicle, including a solenoid-operated directional control valve for communication of a pressure chamber in a hydraulic actuator, selectively with a hydraulic power source and a reservoir, and a solenoid-operated flow control valve disposed between the directional control valve and one of the pressure chamber, hydraulic power source and reservoir, the hydraulic control device being operated to effect rapid and slow rise and fall of a pressure in the hydraulic actuator, in response to a slip ratio of a wheel of the vehicle. The flow control valve comprises a flow restrictor which permits a restricted flow of a fluid through the valve even when its valving member is seated on a valve seat in which a valve hole is open. The flow restrictor is provided in one of various forms except an ordinary orifice with a small diameter. The flow restrictor may be a groove formed in an end face of a valving member opposite to the valve seat, a rough or ragged surface of the valve seat or valving member, or a porous structure formed on the valving member so as to contact the valve seat. Alternatively, the flow restrictor may be formed by a porous structure which fills a hole formed in parallel with the valve hole which is open in the valve seat.
REFERENCES:
patent: 3431028 (1969-03-01), Yoder
patent: 3550966 (1970-12-01), Leiber
patent: 3677300 (1972-07-01), King
patent: 3719401 (1973-03-01), Peruglia
patent: 3724502 (1973-04-01), Hayner et al.
patent: 3866983 (1975-02-01), Kondo
patent: 3893693 (1975-07-01), Skoyles
patent: 4050749 (1977-09-01), Harries et al.
patent: 4090739 (1978-05-01), Iio
patent: 4561701 (1985-12-01), Fujii et al.
patent: 4576204 (1986-03-01), Smallhorn et al.
Ishikawa Masakazu
Nakanishi Nobuyasu
Noguchi Noboru
Nomura Yoshihisa
Shibata Hirochika
Aisin Seiki Kabushiki Kaisha
Butler Douglas C.
Toyota Jidosha & Kabushiki Kaisha
LandOfFree
Solenoid-operated hydraulic control device for anti-skid brake s does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Solenoid-operated hydraulic control device for anti-skid brake s, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Solenoid-operated hydraulic control device for anti-skid brake s will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-699315