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:
Feb. 29, 2000
Filed:
Aug. 07, 1998
Uwe Gartner, Remshalden, DE;
Daimler Chrysler AG, Stuttgart, DE;
Abstract
In a method and apparatus for operating an internal combustion engine having an air intake duct for supplying combustion air to the engine, an exhaust pipe for discharging exhaust gases from the engine, and an exhaust gas recirculation pipe extending between the exhaust pipe and the air intake duct and including an exhaust gas recirculation valve, oxygen sensors are provided in the air intake pipe and in the exhaust duct and are connected to a control unit which determines from the signals generated by the oxygen sensors the actual exhaust gas recirculation rate and dependent thereon controls the exhaust gas recirculation valve so as to generate a desired exhaust gas recirculation flow for the momentary engine operating point.