| 摘要 |
<p>A two or more channel electronic braking system (EBS) adapted to control at least one axle by a single control channel and wherein wheel speed signals (W1, W2, W3, W4), from at least four vehicle wheels are processed in an electronic controller. Wheel speed input processors provide accurate wheel speed measurements which are updated frequently and regularly and further processed to yield wheel and vehicle deceleration signals and a rate of change of deceleration signal. When speed selectors (90) are switched by a mode control section (50) to 'Select Low' or 'Select High' when split mu conditions are detected. The mode control section (50) accepts processed slip averages and skid control conditions to detect split-adhesion operation and make thereupon the 'Select High' or 'Select Low' decisions. The latter components collectively give ABS operation characterised by having the vehicle operating mode set to 'Select Low' until split-adhesion conditions are detected on any axle when on the first skid cycle where any processed and filtered wheel-slip level is large, whilst at the same time the processed slip levels at the opposite wheel on that axle and at the wheel on the opposite end of a second axle are both low and the deceleration of the vehicle does not exceed a mid range value pre-set in the band 2.5 to 3.5 m/s2.</p> |
