Speed-responsive tag axle control system

Abstract From the Canadian patent

A speed-responsive tag axle control system is disclosed including comparison circuit means which are operable when the rotational velocity of one driven wheel of a motor vehicle overruns the opposite driven wheel by a predetermined amount to simultaneously brake the faster driven wheel and shift the vehicle load from the tag axle wheels to the driven wheels. Pressure fluid motor means are connected between the tag axle and the vehicle chassis for normally transferring load from the driven wheels said motor, means being vented by said comparison circuit means to transfer the load back to the driven wheels upon the occurrence of a driven wheel overspin condition.