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:
Dec. 04, 2012
Filed:
Jul. 07, 2008
Sei Kojima, Okazaki, JP;
Sei Kojima, Okazaki, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
When deceleration lock-up differential pressure learning control is entered and a difference between this deceleration lock-up differential pressure instruction value and a disengagement initial pressure of lock-up smooth off control becomes smaller than prior to deceleration lock-up differential pressure learning control, the disengagement initial pressure PS of lock-up smooth off control is corrected to a low side in accordance with a difference between that deceleration lock-up differential pressure instruction value and the disengagement initial pressure. Furthermore, by changing the sweep gradient of lock-up smooth off control to a small side, and in addition, correcting the disengagement initial pressure PS of lock-up smooth off control to a low side in consideration of disengagement delay of the lock-up clutch pursuant to that sweep gradient change, the actual disengagement time during lock-up smooth off control can be matched with a target disengagement time.