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:
Oct. 16, 2018
Filed:
Dec. 04, 2014
GM Global Technology Operations Llc, Detroit, MI (US);
Edward J. Keating, Ortonville, MI (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A multi-cylinder spark-ignition internal combustion engine (engine) that includes a dedicated-cylinder exhaust gas recirculation (EGR) system is described. The dedicated-cylinder EGR system includes a controllable exhaust gas diverter valve that selectively diverts all exhaust gas produced by one of the cylinders to an air intake system of the engine. A method for controlling the engine includes monitoring a parameter associated with operation of the dedicated-cylinder EGR system. Upon detecting a change in the parameter that indicates a change in operation of the dedicated-cylinder EGR system, a controller controls operation of the internal combustion engine to reduce an effective cylinder compression ratio.