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:
Dec. 11, 2018
Filed:
Dec. 08, 2015
Hitachi Construction Machinery Co., Ltd., Taito-ku, Tokyo, JP;
Masafumi Hita, Tsuchiura, JP;
Seiji Ishida, Hitachinaka, JP;
Ken Takeuchi, Kasumigaura, JP;
Shinya Imura, Toride, JP;
Hitachi Construction Machinery Co., Ltd., Tokyo, JP;
Abstract
A motor generator () is connected mechanically to an engine () and a hydraulic pump (). The hydraulic pump () delivers pressurized oil to cylinders (D) to (F) in a working mechanism (), a traveling hydraulic motor () and a revolving hydraulic motor (). The revolving hydraulic motor () drives a revolving device () in cooperation with a revolving electric motor (). The motor generator () and the revolving electric motor () are connected electrically to an electricity storage device (). An HCU () sets a target electricity storage rate (SOC) of the electricity storage device () and a pump output limit (POL) of the hydraulic pump () corresponding to a mode selected by a mode selection device (). The HCU () controls the engine (), the motor generator (), the revolving electric motor () and the electricity storage device () corresponding to the target electricity storage rate (SOC) and the pump output limit (POL).