Synchronized mid-mounted clutch for variable power train

摘要

A microprocessor controlled drive train having an engine-connected variable ratio speed transmission and a load-connected range gear transmission connected by a mid-mounted clutch disposed therebetween has an automatic clutch control mode of operation, with the clutch disengaged and the range transmission in gear to complete a shift, wherein the speeds of the clutch sides are synchronized before engagement by appropriately varying the ratio of the speed transmission, thereby eliminating shift shock. This automatic clutch control mode is preferably employed in combination with operating modes which control both the speed transmission ratio and engine throttle to maintain fuel efficient operation.