CONTROL DEVICE OF PRIME MOVER FOR DRIVING HYDRAULIC MACHINE

摘要

PURPOSE: To perform effective cooling even when the abnormal increase of temperature occurs to cooling water for a prime mover, in a control device for a prime mover for driving a hydraulic machine on which a system for automatically reducing the number of revolutions of the prime mover after suspension of a work is mounted. ;CONSTITUTION: A temperature switch 35 by which a command signal S is outputted when the temperature of cooling water for a water-cooled prime mover 1 exceeds a given value and a relay 36 which is operated by means of the command signal A and by which a signal transmission circuit to a solenoid valve 27 is shut off are provided. When the command signal S is outputted, the signal transmission circuit is shut off, a cylinder 26 can not be operated, whereby a sublink 23 can not be rotated and a throttle lever 25 is held in a high rotation position. Thereby, the water-cooled prime motor l is allowed to continue its drive at the preset high number of revolutions and causes effective cooling of an internal combustion engine.;COPYRIGHT: (C)1993,JPO&Japio