Title:
HYDRAULIC BRAKING DEVICE FOR VEHICLE
Document Type and Number:
Japanese Patent JPH01111556
Kind Code:
A
Abstract:
PURPOSE:To obtain both a preventing control function for wheel lock and a preventing function for slip during driving in a simple structure in a braking device which has a X type braking system and a hydraulic control valve insertedly provided on each system by insertedly providing a directional controllable check valve at two positions on a hydraulic supply pipe line of each system respectively. CONSTITUTION:One hydraulic pressure generating chamber of a master cylinder 1 is connected to a wheel cylinder 7a on the side of a right-front wheel through a three position electromagnetic change-over valve 4a and a pipe line 5, and to a wheel cylinder 12b on the side of a left-rear wheel through a branched pipe line 5a and a valve device 8 or the like. The other hydraulic pressure generating chamber is similarly connected to each of wheel cylinders 7b, 12a. In this case, pipe lines 3a, 16a to connect delivery sides of hydraulic pumps 20a, 20b on pipe lines 3, 16 with the master cylinder 1 are insertedly provided with check valves 26a, 26b which can change over the pipe lines 3a, 16a into a bidirectionally freely communicating state and a state where hydraulic circulation toward the master cylinder 1 is cut off, and the check valves 26a, 26b are changed over according to states of wheel lock and of a slip during driving to be controlled.
Inventors:
ARIKAWA TETSUO
Application Number:
JP26981987A
Publication Date:
April 28, 1989
Filing Date:
October 26, 1987
Export Citation:
Assignee:
NIPPON ABS LTD
International Classes:
B60T8/40; B60T8/174; B60T8/1761; (IPC1-7): B60T8/40
Attorney, Agent or Firm:
Yasuo Iisaka