An object is to reduce a load acting on an engine upon starting up the engine such that the engine can be quickly started up to reliably feed pressure oil from a hydraulic pump to an accumulator. A hydraulic control system is provided with first accumulators (24,25) connected to a hydraulic pump (23) via a first line (28) and second accumulators (26,27) connected to a second line (29) branching from the first line (28), an on/off valve (32) arranged in the second line and interposed between the first line (28) and the second accumulators (26,27), an operation detection device (41) for detecting whether or not a starter (22) is in an operation state, a rotational frequency detection device (a rotary encoder (47) and rotational frequency calculation device (43)) for detecting a rotational frequency of an engine (21), and a valve control device for, upon detection of the operation state of the starter (22) by the operation detection device (41), controlling a valve position of the on/off valve (32) at a closed position until the rotational frequency reaches an idling rotational frequency set beforehand but then controlling the valve position of the on/off valve (32) at a closed position.
Hydraulic control device of wheeled industrial vehicle
2016-08-30
Patent
Electronic Resource
English
IPC: | F16D COUPLINGS FOR TRANSMITTING ROTATION , Nicht schaltbare Kupplungen / B60T Bremsanlagen für Fahrzeuge oder Teile davon , VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF / F02D CONTROLLING COMBUSTION ENGINES , Steuern oder Regeln von Brennkraftmaschinen / E02F Baggern , DREDGING / F15B SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL , Druckmittelbetriebene Systeme allgemein |
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