Hitachi Construction Machinery Co., Ltd.

Takahiro Sagara

Hisashi Yokoyama

Satoshi Inose

Tien Trien Le

An injector failure diagnostic devicediagnoses injector failures for a multi-cylinder internal combustion enginehaving injectorsto, each injector injects fuel to the corresponding cylinder. The injector failure diagnostic deviceincludes: an operating sound obtainment unitconfigured to obtain current operating sound that is operating sound when all of the injectors operate, and obtain pseudo-failure operating sound sequentially for each of the injectors, the pseudo-failure sound being operating sound generated by stopping the fuel injection from one injector while maintaining the operation of the remaining injectors; and a faulty injector identification unitconfigured to determine whether or not the pseudo-failure operating sound of each injector obtained by the operating sound obtainment unitis similar to the current operating sound to identify a faulty injector.

Growing community of inventors

Kanagawa, Japan

Takahiro Sagara