Engine and Pump Control Device and Working Machine
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Jan 29, 2015
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Jan 30, 2014
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Engine and pump control device including controller functioning to, when pump discharge pressure changes from flow rate control area in which pump discharge flow rate is controlled at a low load to output control area in which engine output is controlled at a middle or high load, calculate each value of reduced engine rotating speed and increased engine torque on condition that the product of the engine rotating speed by the engine torque is maintained within a predetermined output level and control engine rotating speed based on these values and control the swash plate angle of the variable displacement pump.
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