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. 23, 2013
Filed:
Sep. 04, 2008
Toshinari Shinohara, Saitama-ken, JP;
Toru Kitamura, Saitama-ken, JP;
Chiho Itoga, Saitama-ken, JP;
Honda Motor Co., Ltd., Tokyo, JP;
Abstract
There is provided an internal EGR control system for an internal combustion engine, which is capable of ensuring an excellent combustion state by properly controlling an internal EGR amount. The internal EGR control system is comprised of a variable valve operating mechanismfor controlling an internal EGR amount of combustion gases caused to remain in cylindersby changing valve-closing timing CAEXVC of exhaust valves, target internal EGR amount-setting meansfor setting a target internal EGR amount of the internal EGR amount EGRINC according to detected operating conditions NE, PMCMD of the engine, valve-closing timing-calculating meansfor calculating valve-closing timing of the exhaust valvesbased on the set target internal EGR amount EGRINC, valve-closing timing-correcting meansfor correcting the calculated valve-closing timing of the exhaust valves according to the acquired wall surface temperature parameter TW indicative of wall surface temperature of the cylinder, and control meansfor controlling the variable valve operating mechanism based on the corrected valve-closing timing of the exhaust valves