The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 23, 2023
Filed:
Mar. 27, 2020
Hitachi Construction Machinery Co., Ltd., Tokyo, JP;
Tien Trien Le, Kanagawa, JP;
Hisashi Yokoyama, Ibaraki, JP;
Takahiro Sagara, Kanagawa, JP;
Satoshi Inose, Ibaraki, JP;
HITACHI CONSTRUCTION MACHINERY CO., LTD., Tokyo, JP;
Abstract
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.