Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1995-11-07
1997-04-08
Graham, Matthew C.
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
13759617, B60T 834
Patent
active
056180870
ABSTRACT:
A 2-position 3-way solenoid valve having first, second and third ports and first and second chambers. The first chamber is communicated with the first port and the second chamber is communicated with the second and third ports. The chambers is partitioned by a barrier wall and are communicated with each other by a opening formed to the barrier wall. In response to a valve-actuated signal, a spool is moved in lengthwise direction, so that the opening and the third port are opened alternatively. When the third port is closed, the hydraulic pressure generated from a hydraulic pump is supplied to a brake wheel cylinder through the first and second ports to increase braking pressure. When the opening is closed, the hydraulic pressure within the brake wheel cylinder is decreased through the second and third ports to decrease braking pressure.
REFERENCES:
patent: 4944331 (1990-07-01), Tackett
patent: 5022717 (1991-06-01), Heibel et al.
patent: 5218996 (1993-06-01), Schmitt-Matzon
patent: 5354123 (1994-10-01), Albert
patent: 5407260 (1995-04-01), Isshiki et al.
patent: 5460438 (1995-10-01), Hellmann et al.
Daewoo Electronics Co. Ltd.
Graham Matthew C.
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