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:
Apr. 29, 2008
Filed:
Sep. 26, 2006
Ken Ogawa, Saitama-ken, JP;
Toshinari Shinohara, Saitama-ken, JP;
Tetsuaki Nakano, Saitama-ken, JP;
Honda Motor Co., Ltd., Tokyo, JP;
Abstract
A control system for an internal combustion engine, which can determine just enough amounts of demanded combustion fuel and auxiliary fuel during execution of auxiliary fuel supply, for improvement of fuel economy and drivability and the emission-reducing capability of a catalyst. The control system carries out auxiliary fuel supply for a cylinder during a predetermined time period within the expansion and exhaust strokes, to control the catalyst to a predetermined state for its emission-reducing capability. The control system calculates a whole demanded fuel amount to make oxygen concentration in exhaust gases equal to a predetermined value for controlling the catalyst to the state during auxiliary fuel supply, determines the amount of demanded combustion fuel to be supplied to obtain engine output, and determines the auxiliary fuel amount based on the difference between the whole demanded fuel amount and the demanded combustion fuel amount.