Hydraulic pressure control valve and vehicle brake

专利名称：Hydraulic pressure control valve and vehicle

brake device using the same

发明人：Nakano, Keita申请号：EP02024507.2申请日：20021030公开号：EP1308360B1公开日：20061018

摘要：A hydraulic pressure control device (3) is provided which is capable of pressurereduction and pressure increase by electronic control without changing over hydrauliccircuits, and which is reliable and simple in structure, and a vehicle brake device using it isprovided. A pressure chamber (33) and an offset spring (34) are added to a hydraulicpressure control valve (3) in which by moving a spool valve (32) to a position

corresponding to brake operating force, thereby changing over connections between theoutput port (31b) and the discharge port (31c) and between the output port (31b) andthe input port (31a) and adjusting the degrees of opening of valve portions, therebycontrolling the hydraulic pressure at the output port to a value corresponding to thebrake operating force. By introducing a pressure P1 adjusted by a pressure-adjustingvalve (5) into the pressure chamber (33) and lowering the hydraulic pressure in thepressure chamber (33) in the range of P1 to 0 for pressure reduction by electroniccontrol. Also, by opening a valve (12) and increasing the pressure in the pressure chamber(33) to the range of P1 to Pmax, pressure increase by electronic control is possible.

申请人：SUMITOMO ( SEI) BRAKE SYSTEMS, INC.

代理机构：Grünecker, Kinkeldey, Stockmair & Schwanhäusser Anwaltssozietät

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