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:
Jul. 23, 1991
Filed:
Jun. 12, 1990
Applicant:
Inventors:
Richard van Basshuysen, Bad Wimpfen, DE;
Gunter Kromer, Heilbronn, DE;
Assignee:
Audi AG, Ingolstadt, DE;
Primary Examiner:
Int. Cl.
CPC ...
F02M / ;
U.S. Cl.
CPC ...
123 / ;
Abstract
The operation of a spark-ignition internal combustion engine of a vehicle, which is provided with an exhaust gas catalyst, with fuels of very different octane numbers is made possible without endangering the internal combustion engine and the exhaust gas catalyst owing to the fact that, when combustion with knocking occurs, at first the ignition angle is withdrawn up to a particular value, that is, the ignition timing is adjusted in the direction or retarded ignition, and then, in the event of further knocking, the suction pipe length is changed for the purpose of reducing the amount of fuel charged to the cylinder.