PRIME MOVER CONTROLLER OF CONSTRUCTION MACHINE

摘要

A prime mover controller in a construction machine comprising a hydraulic pump (11) being driven by a prime mover (40), a hydraulic motor (5) for traveling being driven by pressure oil delivered from the hydraulic pump (11), and a control valve (12) for controlling pressure oil flow from the hydraulic pump (11) to the hydraulic motor (5) depending on the operation of an operating member (22a). The prime mover controller further comprises means (31) for detecting the decelerating operation of the operating member (22a), means (35) for detecting the revolution speed Nm of the hydraulic motor (5), and means (30, 43) for controlling the revolution speed of the prime mover (40) depending on the detection results of the means (35) for detecting the revolution speed when a decelerating operation is detected by the means (31) for detecting the decelerating operation and controlling the revolution speed of the prime mover (40) depending on the operation of the operating member (22a) when an operation other than decelerating operation is detected.