| 摘要 |
PURPOSE:To enable traction control without need for using information on wheel speed on non-driving wheels by selecting the lowest value among the wheel speeds of plural driving wheels, and regarding a driving wheel the wheel speed of which is above a certain value with respect to this lowest value, as a spinning wheel. CONSTITUTION:A hydraulic multiple disc clutch 6 (subscripts omitted) is installed to the axle of each wheel and its clutch pressure can be adjusted by controlling a magnetic selector valve 10 by means of a control device. The control device has an operating circuits 22 for operating wheel speeds Vw from pulse signals from revolution sensors 21 attached to the axles and from the radii of gyration of wheels, an operating circuit 23 for operating wheel acceleration Vw' from the Vw, and a subtractor 24 which subtracts an allowable spinning quantity DELTAVw from the Vw. Also, a select low switch 38 which selects the lowest value among the wheel speeds Vw1 to Vw4 obtained by the operating circuits 22 respectively, is provided to detect the spinning of a wheel in accordance with the value of either the lowest value or a pseudo-car speed Vi whichever is the lower, by a comparator 20. |
