Patent ID: 7357755

Claim:
A system for controlling a speed of an internal combustion engine mounted on a walk-behind truck having a bed that carries cargo, to power driven wheels through a clutch such that the truck runs, comprising: an engine speed controller controlling the speed of the engine to a desired engine speed; a clutch-disengaged switch generating a first output indicating that an operator performs an operation for disengaging the clutch; a turn-lever switch generating a second output indicating that the operator performs an operation for turning the truck; and a desired engine speed determiner determining the desired engine speed to a first value when the first output and the second output are not generated, while determining the desired engine speed to a second value, that is lower than the first value, when at least one of the first output and the second output is generated, wherein the desired engine speed determiner raises the desired engine speed toward the first value if the desired engine speed is smaller than the first value when the first output and the second output are not generated, and wherein the desired engine speed determiner raises the desired engine speed toward the first value when a predetermined time period has passed.