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Title:
ANTILOCK CONTROL METHOD FOR 4-WHEEL DRIVE CAR
Document Type and Number:
Japanese Patent JPH02299963
Kind Code:
A
Abstract:

PURPOSE: To reduce the occurrence of mutual interference between front and rear wheels related to braking by a method wherein, in a 3-channel antilock control method for a 4-wheel drive car, control of a brake liquid pressure is made on right and left rear wheels such that a wheel speed being the lowermost speed of four wheel speeds is a wheel speed to be controlled.

CONSTITUTION: From outputs from wheel speed sensors 1 - 4 mounted to respective wheels, wheel speeds Vw1 - Vw4 are determined by computing circuits 5 - 8, respectively. Left and right front wheel speeds Vw1 and Vw2 produce first and second system speeds Vs1 and Vs2 as they are to send them to second control logic circuits 9 and 10. The lowermost wheel speed of the wheel speeds Vw1 - Vw4 is selected by a low select circuit 11, and is sent as a third system speed, i.e. a rear wheel system speed Vs3, to a third control logic circuit 12. By the control logic circuits 9, 10, and 12, ON and OFF control of a hold valve HV and a decay valve DV is effected such that the system speeds Vs1 - Vs3 are respective wheel speeds to be controlled.


Inventors:
HIROBE YOSHIAKI
SHIMANUKI HARUKI
EGUCHI MEGUMI
MIYAKE KATSUYA
AKIMA HIDEO
MORI FUMITOSHI
Application Number:
JP1989000118722
Publication Date:
December 12, 1990
Filing Date:
May 15, 1989
Export Citation:
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Assignee:
AKEBONO BRAKE IND
FUJITSU LTD
International Classes:
B60T8/1769; B60T8/1761; B60T8/58; (IPC1-7): B60T8/58



 
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