建設機械 - Hitachi Sumitomo Heavy Industries Construction Crane Co., Ltd.

Title:

建設機械

Document Type and Number:

Japanese Patent JP5816586

Kind Code:

B2

Abstract:

PROBLEM TO BE SOLVED: To provide a construction machine prevented from moving during engine restart and having high efficiency of fuel economy.SOLUTION: A construction machine comprises: a pilot type running control valve; a pressure sensor detecting a pilot pressure output in response to an operation amount of a running lever; an accumulator connected to a pilot pipe passage connecting a pilot pump and a pilot valve of the running lever; a communication/interruption means for bringing the pilot pipe passage into communication/interruption with the accumulator; a restart condition determination means for determining whether or not a first restart condition including the presence/absence of restart operation of an engine is established and determining that a second restart condition is established when the pressure detected by the pressure sensor is lower than a predetermined value after determining that the first restart condition is established; an engine control means for restarting the engine when the first restart condition is established by performing the restart operation during idle stop and then the second restart condition is established; and a communication/interruption control means for bringing the pilot pipe passage into communication with the accumulator by the communication/interruption means when the first restart condition is established.

Inventors:

Koji Torii

Application Number:

JP2012080827A

Publication Date:

November 18, 2015

Filing Date:

March 30, 2012

Export Citation:

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