Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1990-03-30
1991-08-20
Butler, Douglas C.
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
188359, 303110, 303114, 303119, B60T 858
Patent
active
050408526
ABSTRACT:
A brake device has a static pressure line for generating brake fluid pressure in at least one line by manual operation, a dynamic pressure source such as a power pump, an electronic control unit, a stroke sensor for detecting the control input of the manual operation, a unit for measuring or estimating the vehicle deceleration, a first control valve adapted to alternately supply and not supply pressure fluid from the dynamic pressure source to the static pressure line, and a second control valve adapted to alternately discharge and not discharge pressure fluid from the static pressure line to a reservoir. The electronic control unit feeds operating commands to the first and second control valves to introduce a predetermined amount of pressure fluid from the dynamic pressure source into the static pressure line or discharge the pressure fluid in the static pressure line into the reservoir so that the relation between the stroke detected by the stroke sensor and the vehicle deceleration will fall within a predetermined range.
REFERENCES:
patent: 4435021 (1984-03-01), Hoenick
patent: 4818038 (1989-04-01), Ocvirk et al.
patent: 4826255 (1989-05-01), Volz
patent: 4950028 (1990-08-01), Harrison
Butler Douglas C.
Sumitomo Electric Industries Ltd.
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