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. 28, 2019
Filed:
Feb. 10, 2015
Hitachi Construction Machinery Co., Ltd., Taito-ku, Tokyo, JP;
Kabushiki Kaisha Toyota Jidoshokki, Kariya-shi, Aichi, JP;
Manabu Edamura, Kasumigaura, JP;
Yuusuke Kajita, Ushiku, JP;
Masatoshi Hoshino, Tsuchiura, JP;
Kouji Ishikawa, Kasumigaura, JP;
Kentarou Itoga, Tsukuba, JP;
Naoki Ishikawa, Kariya, JP;
Tsutomu Umehara, Kariya, JP;
Hitachi Construction Machinery Co., Ltd., Tokyo, JP;
Kabushiki Kaisha Toyota Jidoshokki, Kariya-shi, JP;
Abstract
Provided are a work machine, a power unit, and a diesel engine of a work machine that make it possible to reduce emitted noxious substances to levels below reference values stipulated by exhaust gas regulations in advanced countries and regions while also omitting or simplifying a post-treatment device. A hydraulic pump is driven by a diesel engine that limits maximum output torque in a low revolution speed region lower than a high revolution speed region including a rated revolution speed in such a manner that the maximum output torque has a characteristic of intermediate torque lower than torque of a maximum output horsepower point at the rated revolution speed, and a hydraulic actuator is driven by hydraulic fluid delivered from the hydraulic pump.