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. 06, 2006
Filed:
Sep. 23, 2003
Koji Nagata, Toyota, JP;
Yuuji Kashihara, Toyota, JP;
Yoji Takanami, Anjyo, JP;
Kazutoshi Nozaki, Toyota, JP;
Akio Murasugi, Toyota, JP;
Koji Nagata, Toyota, JP;
Yuuji Kashihara, Toyota, JP;
Yoji Takanami, Anjyo, JP;
Kazutoshi Nozaki, Toyota, JP;
Akio Murasugi, Toyota, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
When a shift routine is not being executed in an automatic transmission and a difference between an actual turbine speed and a calculated synchronous speed is equal to, or greater than, a preset value α, a difference ΔNT between an estimated turbine speed and the actual speed when the automatic transmission is in a neutral state is calculated. When ΔNT is equal to, or less than, a preset value β, it is determined that a failure related to the neutral state of the automatic transmission has occurred. Also, when ΔNT is greater than a preset value β, it is determined that a failure related to slipping of a frictional engaging element has occurred.