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:
Nov. 08, 2011
Filed:
May. 14, 2009
Nando Vennettilli, Turin, IT;
Massimiliano Maira, Turin, IT;
Nando Vennettilli, Turin, IT;
Massimiliano Maira, Turin, IT;
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A method and system are provided for controlling a throttle valve and an EGR valve in internal combustion engine. The method includes, the steps of measuring an actual fresh mass air flow value entering the engine, determining an exhaust oxygen concentration set point indicative of the oxygen concentration in the exhaust manifold, calculating an air reference value as a function of the exhaust oxygen concentration set point ([O]) and determining an oxygen concentration feedback value representative of the oxygen concentration in the engine. The method further includes, but is not limited to the steps of obtaining a position information for the throttle valve by comparing the actual fresh mass air flow value and air reference value and obtaining a position information for the EGR valve by comparing the oxygen concentration feedback value and oxygen concentration set point. The method also includes the steps of controlling the throttle valve and the EGR valve according to the position information.