logo

For the Inventor, By the Inventor

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.:

US 9109586 B1

PDFFull Text
Date of Patent:
Aug. 18, 2015

Filed:

Jul. 13, 2011

Electro-hydraulic drive system for a work machine

Applicants:

Masahiro Yamada, Kobe, JP;

Ryo Yamamoto, Kobe, JP;

Yukito Imamura, Kobe, JP;

Inventors:

Masahiro Yamada, Kobe, JP;

Ryo Yamamoto, Kobe, JP;

Yukito Imamura, Kobe, JP;

Assignee:

KAWASAKI JUKOGYO KABUSHIKI KAISHA, Hyogo, JP;

Attorney:

Oliff PLC

Primary Examiner:

Hoang Nguyen

Int. Cl.
CPC ...
F16D 31/02 (2006.01); F01B 21/04 (2006.01); F04B 17/03 (2006.01); B60K 6/20 (2007.10); E02F 9/12 (2006.01); E02F 9/20 (2006.01); F03C 1/06 (2006.01); F03C 1/40 (2006.01); F03C 1/26 (2006.01); F04B 49/00 (2006.01); F15B 21/14 (2006.01); H02K 7/00 (2006.01); H02K 7/18 (2006.01); H02P 3/14 (2006.01); E02F 9/22 (2006.01); F16H 61/4148 (2010.01); F01C 13/04 (2006.01);
U.S. Cl.
CPC ...
F04B 17/03 (2013.01); B60K 6/20 (2013.01); E02F 9/123 (2013.01); E02F 9/2075 (2013.01); E02F 9/2095 (2013.01); E02F 9/2217 (2013.01); E02F 9/2296 (2013.01); F03C 1/0636 (2013.01); F03C 1/0678 (2013.01); F03C 1/26 (2013.01); F04B 49/002 (2013.01); F15B 21/14 (2013.01); F16H 61/4148 (2013.01); H02K 7/00 (2013.01); H02K 7/1807 (2013.01); H02P 3/14 (2013.01); B60W 2300/17 (2013.01); F01C 13/04 (2013.01); F15B 2211/20515 (2013.01); F15B 2211/20523 (2013.01); F15B 2211/20546 (2013.01); F15B 2211/50527 (2013.01); F15B 2211/633 (2013.01); F15B 2211/6336 (2013.01); F15B 2211/88 (2013.01);
Abstract

An electro-hydraulic drive system for a work machine which drives an upper rotary body by controlling a flow rate of a hydraulic fluid by a control valve, includes an electro-hydraulic pump including a hydraulic pump driven by an engine, and a first electric motor, and an electro-hydraulic motor including a hydraulic motor rotated by the hydraulic oil supplied from the electro-hydraulic pump, and a second electric motor, and a controller which determines an operating state of the first electric motor and an operating state of the second electric motor based on a load of the electro-hydraulic pump and a load of the electro-hydraulic motor, and is able to perform an efficient operation by using a hydraulic pressure (fluid pressure) and electric power.

Find Patent Forward Citations

Loading…