| 摘要 |
PURPOSE:To improve running stability of a vehicle when a split mu road (different mubetween left and right) is judged due to generation of difference of pressurized quantities of left and right wheels by controlling a wheel of larger pressurized quantity side to be lightened so as to restrain generation of yaw moment. CONSTITUTION:Among wheel speed signals obtained from outputs of respective wheel speed sensors 1-4, left and right front wheel speed signals are set as system speeds Vs1, Vs2 of a first and a second channels, a wheel speed on the lower speed side of left and right rear wheel speed signals is set as a system speed Vs3 of a third channel, and they are input to a first-a third control logic circuits 9, 10, 12. Hold valves HV and decay valves DV are controlled based on variation of respective system speeds. In this case, pressurizing time counting circuits 15, 16 and a comparison circuit 17 are further provided, the pressurized quantities in respective control systems are compared with each other, the control system on the large pressurized quantity side is judged on the high muroad side, and the brake liquid pressure in the control system on the high road side is controlled so as to restrain excessive pressure rise of it.
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