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. 22, 1987
Filed:
May. 08, 1986
Yasushi Mori, Yokohama, JP;
Nissan Motor Company, Limited, Yokohama, JP;
Abstract
A system and method for controlling a fuel supply to a vehicular internal combustion engine, in which a predetermined threshold value at which a fuel supply cutoff zone of the engine is initiated is varied so as to provide an optimum range of the fuel cutoff zone according to a magnitude of the engine deceleration and the variation of the predetermined threshold value is learned and stored for the subsequent use as the predetermined threshold value to cope with a characteristic change of the system including the engine and engine output power transmission. When the magnitude of the engine deceleration is large, the predetermined threshold value is increased so as to avoid repetition of fuel supply cutoff and fuel supply resumption which affects adversely the engine driveability. When the magnitude is small, the predetermined threshold value is decreased i.e., made closer to another predetermined threshold value at which a fuel supply recovery is carried out so as to extend the fuel supply cutoff zone.