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:
Jun. 03, 2003
Filed:
Aug. 12, 2002
Ritsuo Sato, Yokohama, JP;
Masahiko Yuya, Yokohama, JP;
Hiroshi Katoh, Yokohama, JP;
Takahisa Koseki, Yokohama, JP;
Nissan Motor Co., Ltd., Yokohama, JP;
Abstract
In a four-stroke cycle multi-cylinder internal combustion engine ( ), a controller ( ) controls fuel injectors ( ) to inject fuel for the cylinder (# ) in the intake stroke immediately after the first cylinder-stroke identification is performed. Due to this fuel injection control, the fuel is necessarily injected before the first combustion occasion at any cylinder ( ), cylinder dependent fluctuation of air-fuel ratio when the first combustion takes place in the respective cylinders ( ) is prevented. Further, in a predetermined low temperature range, the controller ( ) controls fuel injectors ( ) to perform a preliminary fuel injection for all the cylinders ( ) before the first cylinder-stroke identification, so the fuel amount required for the first combustion is ensured for all the cylinders ( ).