PRIME MOVER CONTROLLER OF CONSTRUCTION MACHINE

摘要

A prime mover controller in a construction machine comprising a hydraulic pump (24) being driven by a prime mover (10), an actuator (5) being driven by pressure oil delivered from the hydraulic pump (24), and a control valve (25) for controlling pressure oil flow from the hydraulic pump (24) to the actuator (5) depending on the operation of a first operating member (22a). The prime mover controller further comprises a first setting means (41) for setting a first set revolution speed Nt of the prime mover (10) depending on the operation of the first operating member (22a), a second setting means (43) for setting a second set revolution speed Nx of the prime mover (10) depending on the operation of a second operating member (34), a member (35) for selecting a first mode or a second mode, and means (30, 13) for controlling the revolution speed of the prime mover to the larger one of the first set revolution speed Nt and the second set revolution speed Nx when the first mode is selected by the selecting member (35) and to the second set revolution speed Nx when the second mode is selected by the selecting member (35).