| 摘要 |
PURPOSE:To make it possible to prevent a wheel from being locked even on a road having a low frictional coefficient to prevent an engine stall, by performing an anti-skid control with a signal created in accordance with a signal relating to the rotation of wheels disengaged from a drive source and a signal from wheels engaged to the drive source. CONSTITUTION:Two front wheels 1, 2 may be selectively disengaged from an engine 5 to serve as no drive wheels, and two rear wheels 3, 4 serve as all-time drive wheels. Further, anti-skid control circuits 25a, 25b, 25c receive signals from wheel sensors 31a, 31b, 31c for detecting the rotational speeds of the associated wheels 2, 1, 4, and false vehicle speeds Vi 11, Vi 12 are addi tionally delivered to the circuit 25c. it is judged that the frictional coefficient of the road surface causes a wheel to be locked at an instant time t2 when the vehicle speed Vw 11 becomes lower than a desired vehicle speed Vi 11X0.85 as a control signal, and therefore, an anti-skid control is carried out to decrease the brake pressure. Further, a brake control is performed such that a stop rate gives a maximum fictional coefficient to the road surface.
|
