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:
May. 05, 1998
Filed:
Sep. 05, 1996
Ekkehard Schrey, Aachen, DE;
Guenter Schmitz, Aachen, DE;
Abstract
A method is provided for determining valve control times for a maximum charge for cylinders in a piston-type internal combustion engine provided with fuel injection, lambda sensor control and electromagnetically actuatable cylinder valves. The method includes setting the 'intake closes' control moment to a preliminary value on all gas intake valves of the engine; changing continuously the 'intake closes' control moment on the gas intake valves at least one cylinder while maintaining a constant engine rpm and determining, with the lambda sensor control at .lambda.=1, one of (1) a longest fuel injection duration and (2) a leanest operation at a constant injection duration; and storing the determined 'intake closes' control moments at respective rpm's in a performance characteristic of an engine control for achieving a maximum charge in the cylinders at the respective rpm's.