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. 15, 1992
Filed:
Dec. 12, 1990
Shinsuke Nakazawa, Kanagawa, JP;
Yuji Kato, Tokyo, JP;
Tatsuo Wakahara, Kanagawa, JP;
Shigeki Shimanaka, Kanagawa, JP;
Hiroshi Asano, Kanagawa, JP;
Hiroshi Sasaki, Kanagawa, JP;
Hiroshi Yamaguchi, Kanagawa, JP;
Kazuhiro Ishigami, Kanagawa, JP;
Shinich Takenouchi, Kanagawa, JP;
Nissan Motor Company, Limited, Yokohama, JP;
Abstract
A system and method for controlling an operation of an internal combustion engine of a vehicle having an automatic transmission in which at least one of predetermined fuel supply recovery engine revolution speed or predetermined fuel supply cut-off engine revolution speed is varied during the engine deceleration condition according to a state of operation of the automatic transmission. In the first preferred embodiment, a downshift operation of the automatic transmission is detected. In the second preferred embodiment, an overrun clutch solenoid is turned on (energized). In the latter case, both fuel supply recovery and fuel supply cut-off engine revolution speeds are set to higher values than those when the clutch solenoid is turned off (deenergized).