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. 22, 2004
Filed:
Jan. 22, 2003
Takaaki Tokura, Toyota, JP;
Katsumi Kono, Toyota, JP;
Norimi Asahara, Nishikamo-gun, JP;
Ryoichi Hibino, Nagoya, JP;
Hiroyuki Nishizawa, Tajimi, JP;
Masataka Osawa, Nagoya, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
When changing gear, engagement side clutch coupling force of an automatic transmission ( ) is controlled in response to an engagement side clutch coupling force control amount set in advance in an engagement side clutch coupling force control amount storage section ( ). A disengagement side clutch coupling force control amount calculating block ( ) has a physical model of the automatic transmission ( ) internally. This disengagement side clutch coupling force control amount calculating block ( ) then calculates disengagement side clutch coupling force control amount from a transmission input torque estimation value estimated by a transmission input torque estimation block ( ), a running resistance estimation value from a running resistance estimation block ( ) and engagement side clutch coupling force control amount using the physical model, and controls the automatic transmission ( ) using the calculated disengagement side clutch coupling force control amount. Since disengagement side clutch coupling force control amount is calculated using a physical model, it is easy to adjust the disengagement side clutch coupling amount. It is also suitable to control engine torque at the time of gear shift, and this engine torque can also be determined using a physical equation.