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:
Mar. 15, 2005
Filed:
Dec. 16, 2002
Takaaki Tokura, Toyota, JP;
Katsumi Kono, Toyota, JP;
Norimi Asahara, Aichi-ken, JP;
Masataka Osawa, Nagoya, JP;
Hiroyuki Nishizawa, Tajimi, JP;
Ryoichi Hibino, Nagoya, JP;
Takaaki Tokura, Toyota, JP;
Katsumi Kono, Toyota, JP;
Norimi Asahara, Aichi-ken, JP;
Masataka Osawa, Nagoya, JP;
Hiroyuki Nishizawa, Tajimi, JP;
Ryoichi Hibino, Nagoya, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
In order to control slip amount of a disengagement side engagement device at the time of a gear shift operation, a target value Nr for rotational speed of an input shaft of an automatic transmission is calculated inside an input shaft speed target value calculating block. Slip control of the disengagement side engagement device is then carried out by controlling engine torque using an engine torque control amount obtained from a engine torque control amount estimation block and the clutch slip amount compensation value calculating section to cause rotation speed Nt of the input shaft to follow the target value Nr. In this way, responsiveness and precision of slip control of the disengagement side engagement device at the time of gear shift operation are improved, and it is possible to improve gear shift shock and to carry out a gear shift operation in a short period of time.