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:
Oct. 28, 2003
Filed:
Oct. 31, 2001
Shusaku Katakura, Yokosuka, JP;
Daisuke Yoshinoya, Zama, JP;
Nissan Motor Co., Ltd., Yokohama, JP;
Abstract
An automatic transmission ( ) converts the output torque of an engine ( ) into a drive torque for the vehicle. The automatic transmission ( ) is provided with a first gear and a second gear which has a smaller speed reduction ratio than the first gear. The gears are selectively applied according to the vehicle speed and the accelerator pedal depression amount. A controller ( ) stores a first map ( ) which prescribes the transmission target output torque with the first gear according to the vehicle speed and the depression amount, and a second map ( ) which prescribes the transmission target output torque with the second gear according to the vehicle speed and the depression amount. The first map applies a larger transmission target output torque than the second map at a given vehicle speed and depression amount. The transmission target output torque is calculated by looking up either of these maps corresponding to the gear applied by the automatic transmission ( ). Thus saturation of the transmission target output torque can be prevented by controlling the output torque of the engine ( ) based on the transmission target output torque thus obtained.