Method of controlling an engine mounted on a construction vehicle

摘要

A method of controlling an engine mounted on a construction vehicle comprising the steps of reducing the rotation of the engine to a primary number of revolutions per minute, which is in the vicinity of the rated number of revolutions per minute of the engine under earth moving operation conditions, immediately after all operating levers associated with all of the control valves for turning the vehicle body, for actuating work implements and for running of the vehicle are shifted to their neutral positions, maintaining the engine under such a low speed running condition for a predetermined period of time, and then reducing further the rotation of the engine to a lower, secondary number of revolutions per minute which corresponds to the number of revolutions per minute under idle running conditions thereby achieving reduction in fuel consumption and level of noise generated by the engine.