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. 30, 1998
Filed:
Sep. 06, 1996
Applicant:
Inventors:
Masayuki Sugiura, Goteborg, SE;
Shinichi Matsui, Nagoya, JP;
Tatsuyuki Yoneda, Okazaki, JP;
Kenji Suzuki, Okazaki, JP;
Assignee:
Aisin AW Co., Ltd., , JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01R / ;
U.S. Cl.
CPC ...
324546 ; 324415 ; 73168 ;
Abstract
A short between terminals of a linear solenoid controlled by an electronic control in an automatic transmission is detected by sensing when a PWM duty ratio set by a feedback control operating the linear solenoid is less than a reference duty ratio. The reference duty cycle is calculated to be between a range of expected normal duty ratios in the absence of the short and a range of expected short duty ratios in the presence of the short.