Due to the poor control characteristics of the speed governing system it is sometimes very difficult for diesel vehicles to escape such unfavorable phenomena as 'hunting', engine speed skip' and 'surge'. Surge is a fore and aft vibration of the vehicle liable to occur especially during low speed cruising. It stems from a torsional vibration of the power train which appears next to impossible to avoid for big size of trucks and busses with the conventional control system where the fuel delivery is governed according to the engine speed alone. The author made a theoretical investigation on the surge phenomenon, and proposed that the surge could be suppressed by a control scheme in which wheel speed is duly taken into consideration. The new control scheme is applied to an actual engine-vehicle system with the combination of an efficient microcomputer and electronic control gonernor equipment, and the successful control of surge is demonstrated.