Kobelco Construction Machinery Co., Ltd.

Kobe Steel, Ltd.

Kabushiki Kaisha Kobe Seiko Sho

Kazuhiro Iwasaki

Yoichiro Yamazaki

Toshihiko Nishimura

Hideki Yoshihara

A construction machine that, prior to performing a rewriting process of rewriting a currently used program with a renewal program, detects a charge amount of an electric storage device. When the charge amount detected is smaller than a rewrite charge amount preliminarily set as a charge amount required for the rewriting process, the rewriting is prohibited and the renewal program is transferred to storage. When the charge amount becomes sufficient, the rewriting process is performed using the renewal program stored in the storage.

Construction machine and program-rewritable system equipped with same

A controller includes a communication controller having a communication area and a normal control controller having a normal control area, and is provided in a vehicle. The controller stores an update program, which is transferred via an external communication mechanism from an external server to a vehicle, in the communication controller. If it is determined, based on manipulation of a key switch to a stop position, that updating can be performed, the controller transfers the update program stored in the communication controller to the normal control controller and performs rewriting. A program is thereby reliably rewritten within a short period of time to improve work efficiency.

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Hiroshima, Japan

Kazuhiro Iwasaki