Vehicle hydraulic brake device

Details Vehicle hydraulic brake device Vehicle hydraulic brake device

2004-03-24

2008-08-12

Burch, Melody M (Department: 3683)

Fluid-pressure and analogous brake systems

Speed-controlled

Having a valve system responsive to a wheel lock signal

C303S115100, C303S015000

Reexamination Certificate

active

07410223

ABSTRACT:
A hydraulic brake device includes a hydraulic pressure supply passage for reducing the output hydraulic pressure by a first proportional solenoid valve and supplying it to a hydraulic passage leading from a pressure adjusting valve to the wheel cylinders, a second proportional solenoid valve disposed between the hydraulic pressure supply passage and the pressure adjusting valve for reducing the hydraulic pressure supplied from the hydraulic pressure supply passage, and a check valve parallel to the second proportional solenoid valve. Hydraulic pressure control during automatic brake control is carried out by the first and second proportional solenoid valves. When the brake pedal is operated during automatic brake control and output hydraulic pressure of the pressure adjusting valve exceeds hydraulic pressure in the hydraulic pressure supply passage by automatic brake control, the output hydraulic pressure of the pressure adjusting valve flows toward the hydraulic pressure supply passage through the check valve.

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Official Action issued by Japanese Patent Office in JP 2003-085596 on Jul. 4, 2007, and English language translation.
Official Action issued by German Patent Office in DE 10 2004 014 702.7-21on May 24, 2007, and English language translation.

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