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Title:
HYDRAULIC PRESSURE CONTROLLER
Document Type and Number:
Japanese Patent JPH03220054
Kind Code:
A
Abstract:

PURPOSE: To smoothen the initial operation by interposing a differential pressure valve which is opened according to the increase of the hydraulic pressure of an output port being higher than that in a reaction force chamber over a predetermined value, between an output port connected with the hydraulic operating device such as wheel brake and the reaction force chamber of a hydraulic valve.

CONSTITUTION: In a brake hydraulic pressure controller, the output hydraulic pressure supplied from a hydraulic pressure feeding device 2 is controlled by a hydraulic valve 4 according to the hydraulic pressure outputted from a hydraulic pressure generating means 3 according to the stepping-on quantity for a brake pedal. The hydraulic valve 4 is equipped with a spool 22 fitted in a housing 21, pressing piston 23, and a pressure absorbing means 24, and a reaction force chamber 32 is installed on the front edge part side of the spool 22, and the first input action chamber 34 is installed between the second cylinder hole 26 and the pressing piston 23, and the second input action chamber 35 is installed between the rear edge part of the second cylinder hole 26 and a piston 36. In this case, between the output port 29 of the hydraulic valve 4 and the reaction force chamber 32, a differential pressure valve 45 which is opened according to the increase of the hydraulic pressure of an output port 29 at least by a prescribed valve than the hydraulic pressure of the reaction force cham ber 32 is interposed.


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Inventors:
MATSUDA SHOHEI
TAJIMA KAZUTOSHI
FURUYA KOICHI
NAEI MASAAKI
SUZUKI JIRO
KOJIMA TAKESHI
Application Number:
JP1990000140726
Publication Date:
September 27, 1991
Filing Date:
May 30, 1990
Export Citation:
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Assignee:
HONDA MOTOR CO LTD
International Classes:
B60T8/34; B60T8/40; B60T8/42; B60T8/48; B60T8/94; B60T13/18; F16D48/02; F16D48/04; (IPC1-7): B60T8/40