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:
Apr. 10, 2001
Filed:
Apr. 15, 1999
Applicant:
Inventors:
Peter Hohner, Leinfelden-Echterdingen, DE;
Jürgen Schenk, Albershausen, DE;
Hartung Wilstermann, Gaildorft, DE;
Assignee:
DaimlerChrysler AG, Stuttgart, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F02P 5/152 ;
U.S. Cl.
CPC ...
F02P 5/152 ;
Abstract
The present invention relates to a method for determining the running smoothness of an Otto spark ignition engine by measuring the ionic current (I) in at least one combustion chamber of the Otto spark ignition engine. Once the spark plug has fired, a measuring voltage is applied to the spark plug, inducing the ionic current (I). Following each ionic current measurement, initially an active, average ionic-current value (I,) is defined, and a running-smoothness value (L) is subsequently determined from a reference value and the ionic-current average value (I,).