SYSTEM FOR CONTROLLING REVOLUTION FREQUENCY OF PRI

专利名称：SYSTEM FOR CONTROLLING REVOLUTION

FREQUENCY OF PRIME MOVER INHYDRAULICALLY DRIVEN VEHICLE

发明人：ICHIMURA, KAZUHIRO

TSUKUBARYOU,TAMURA, SEIJI 6227-26,OAZA KOIBUCHI TOMOBEMACHI,TATSUMI,AKIRA,KIHARA, MITSUO 2646-35,

SHIMOINAYOSHI,HOSONO, JUNICHI 3-13-19, INAYOSHI,ASANO, KAZUO 16-7,SAKURAGAOKAMACHI

申请号：EP92904397申请日：19920205公开号：EP0528042A4公开日：19931201

摘要：The system comprises a hydraulic pump (1) driven by an engine (21); a hydraulicmotor (4) for running, driven by oil discharged from the hydraulic pump (1) duringrunning; an actuator (52) for working, driven by oil discharged from the hydraulic pump(1) during working; a running pedal (6) for controlling a running speed in accordance witha manipulated variable during running; a reduced speed determining means (33) fordetermining the reduced depression of the running pedal (6); and a revolution frequencycontroller (33). The revolution frequency controller (33) performs a regular control forincreasingly or decreasingly controlling the revolution frequency of the engine inaccordance with the depth of the depression of the running pedal (6), and slow-down

control for decreasingly controlling the revolution frequency of the engine to match thereduced depth of the depression when the depth of the depression is determined to bereduced. Then, when the revolution frequency of the engine is to be adjusted by therunning pedal (6) during working, even if the depth of the depression of the runningpedal (6) is reduced, the slow-down control is prohibited.

申请人：HITACHI CONSTRUCTION MACHINERY CO., LTD.

地址：6-2, OHTEMACHI 2-CHOME; CHIYODA-KU TOKYO 100

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