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:
Jun. 25, 1991
Filed:
Nov. 08, 1989
Applicant:
Inventor:
Wolfgang Strauss, Denkendorf, DE;
Assignee:
Daimler-Benz AG, , DE;
Primary Examiner:
Int. Cl.
CPC ...
F01N / ;
U.S. Cl.
CPC ...
60274 ; 60276 ;
Abstract
In a process for regulating the fuel/air ratio in internal combustion engines having an exhaust gas measuring probe and a catalyst, the fuel/air mixture fed to the internal combustion engine via a proportioning device being regulated to a virtually stoichiometric value in a control unit with variable characteristics as a function of the exhaust gas composition detected by the measuring probe, the characteristics of the control unit are variable in dependence on the operating time of the catalyst.