Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1993-10-01
1994-11-29
Butler, Douglas C.
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
303111, 3031161, 3031162, 3031191, B60T 832
Patent
active
053683749
ABSTRACT:
A brake fluid pressure control device is provided, and includes a main flow path for connecting, as one system, first and second wheel brakes with a master cylinder, a first reservoir, a fluid pressure adjusting member for selectively enabling the first and second wheel brakes to communicate with the master cylinder and the first reservoir, a pump for pressurizing brake fluid in the first reservoir so as to discharge the brake fluid to a junction of the main flow path and the pump. A second reservoir which is in communication with the fluid pressure adjusting member and the second wheel brake and, a directional control valve which is adapted, in a first state, to enable the master cylinder and the fluid pressure adjusting member to communicate with each other and in a second state to interrupt communication between the master cylinder and the fluid pressure adjusting member are also provided. A control unit is also provided which, at the time of traction control, sets the directional control valve to the second state and drives the pump so as to supply the brake fluid in the second reservoir to the first wheel brake through the fluid pressure adjusting member.
REFERENCES:
patent: 5026127 (1991-06-01), Arikawa
patent: 5150950 (1992-09-01), Arikawa et al.
patent: 5169214 (1992-12-01), Holzmann et al.
patent: 5234264 (1993-08-01), Willmann et al.
Butler Douglas C.
Sumitomo Electric Industries Ltd.
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