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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 9121361 B1

PDFFull Text
Date of Patent:
Sep. 01, 2015

Filed:

Sep. 11, 2008

Control system of electric actuator and control method thereof

Applicants:

Hirokazu Shimizu, Isesaki, JP;

Kenichi Machida, Isesaki, JP;

Inventors:

Hirokazu Shimizu, Isesaki, JP;

Kenichi Machida, Isesaki, JP;

Assignee:

HITACHI, LTD., Tokyo, JP;

Attorney:

Foley & Lardner LLP

Primary Examiner:

Thomas G Black

Assistant Examiner:

Sze-Hon Kong

Int. Cl.
CPC ...
G01M 17/00 (2006.01); F02D 41/22 (2006.01); G06F 11/16 (2006.01); G05B 9/03 (2006.01); F01L 13/00 (2006.01); F02D 41/26 (2006.01); G05B 19/042 (2006.01); G05B 19/048 (2006.01); B60L 3/00 (2006.01); F01L 1/053 (2006.01); F01L 1/14 (2006.01); F02D 41/00 (2006.01);
U.S. Cl.
CPC ...
F02D 41/221 (2013.01); F01L 13/0026 (2013.01); F02D 41/266 (2013.01); G05B 9/03 (2013.01); G06F 11/1633 (2013.01); B60L 3/0092 (2013.01); F01L 1/0532 (2013.01); F01L 1/143 (2013.01); F01L 2001/0537 (2013.01); F01L 2013/0073 (2013.01); F01L 2800/00 (2013.01); F01L 2800/11 (2013.01); F01L 2820/032 (2013.01); F02D 41/009 (2013.01); F02D 2041/001 (2013.01); F02D 2400/08 (2013.01); G05B 19/048 (2013.01); G05B 19/0428 (2013.01);
Abstract

In an aspect of the present invention, each of plural control units which controls drive of an electric actuator diagnoses existence of abnormality in drive control of the electric actuator, the abnormality differing from control unit to control unit; the control unit transmits diagnostic result thereof to another control unit; the control unit outputs an abnormal determination signal as a signal indicating diagnostic result therefrom when at least one of the diagnostic result thereof and the diagnostic result of another control unit indicates abnormality; and the control unit transfers the drive control of the electric actuator to an abnormal use control state when the abnormal determination signal is output from at least one of the plural control units.

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