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:
Jun. 23, 2015
Filed:
Oct. 12, 2011
Shinji Ishihara, Hitachinaka, JP;
Shinya Imura, Toride, JP;
Seiji Ishida, Hitachinaka, JP;
Masatoshi Hoshino, Tsuchiura, JP;
Manabu Edamura, Kasumigaura, JP;
Mitsuo Sonoda, Kasumigaura, JP;
Takatoshi Ooki, Kasumigaura, JP;
Takako Satake, Ishioka, JP;
Shinji Ishihara, Hitachinaka, JP;
Shinya Imura, Toride, JP;
Seiji Ishida, Hitachinaka, JP;
Masatoshi Hoshino, Tsuchiura, JP;
Hidetoshi Satake, Ishioka, JP;
Manabu Edamura, Kasumigaura, JP;
Mitsuo Sonoda, Kasumigaura, JP;
Takatoshi Ooki, Kasumigaura, JP;
HITACHI CONSTRUCTION MACHINERY CO., LTD., Tokyo, JP;
Abstract
In a hybrid construction machine, there is provided a drive control device which realizes in, as a simple a structure as possible, control means of a motor generator, which is capable of preventing rapid decreases in the state of charge. The control means, which calculates a motor torque command value to be output to the motor generator, is characterized by calculating the motor torque command value, based on a difference between an actual state-of-charge and a prescribed target state-of-charge and a torque margin obtained by a difference between a maximum torque of an engine determined based on an actual rotational speed of the engine and an actual torque of the engine.