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:
Sep. 23, 2003
Filed:
Oct. 31, 2001
Shusaku Katakura, Yokosuka, JP;
Daisuke Yoshinoya, Zama, JP;
Nissan Motor Co., Ltd., Yokohama, JP;
Abstract
The upshift and downshift timing of an automatic transmission ( ) is set with a predetermined hysteresis in response to the vehicle speed and the depression amount of the accelerator pedal ( ). When the accelerator pedal ( ) is depressed in a hysteresis region before a downshift, the output torque of the automatic transmission ( ) is saturated before the depression amount takes a maximum value. As a result, even when depressing the accelerator pedal ( ) further, increases do not result in the output torque of the automatic transmission ( ). When the depression amount is less than a predetermined value, this invention sets the rate of increase in the target output torque of the automatic transmission ( ) to a value which is smaller than the rate of increase when the depression amount is greater than the predetermined value. Thus saturation of the output torque of the automatic transmission ( ) can be prevented by controlling the engine output based on the target output torque determined in this manner while the rate of increase in the drive force when the accelerator pedal ( ) is deeply depressed can be maintained.