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:
Aug. 08, 2006
Filed:
Apr. 02, 2004
Sumiko Amamiya, Okazaki, JP;
Tatsuya Ozeki, Torrance, CA (US);
Shigeru Kamio, Nagoya, JP;
Yasuhiro Nakai, Kariya, JP;
Kazuo Kawaguchi, Kasugai, JP;
Yasuo Shimizu, Toki, JP;
Sumiko Amamiya, Okazaki, JP;
Tatsuya Ozeki, Torrance, CA (US);
Shigeru Kamio, Nagoya, JP;
Yasuhiro Nakai, Kariya, JP;
Kazuo Kawaguchi, Kasugai, JP;
Yasuo Shimizu, Toki, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
A P-ECU controls an actuator which drives a shift control mechanism. An encoder signal acquisition unit acquires signals output from an encoder which detects a rotational angle of the actuator. A counter calculates a count value from the output signals of the encoder. An energization control unit controls energization to the actuator. A first phase-matching unit uses the Z-phase signal of the encoder to match the count value with energized phases so as to find a correspondence therebetween and a second phase-matching unit matches the count value with energized phases to find a correspondence therebetween without using the Z-phase signal of the encoder. If the first phase-matching unit detects an abnormality of the encoder, the second phase-matching unit subsequently performs phase matching.