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. 24, 2009
Filed:
Jul. 25, 2007
Albert Kloos, Friedrichshafen, DE;
Andreas Kunz, Friedrichshafen, DE;
Günther Schmidt, Friedrichshafen, DE;
Ralf Speetzen, Friedrichshafen, DE;
Michael Willmann, Bermatingen, DE;
Albert Kloos, Friedrichshafen, DE;
Andreas Kunz, Friedrichshafen, DE;
Günther Schmidt, Friedrichshafen, DE;
Ralf Speetzen, Friedrichshafen, DE;
Michael Willmann, Bermatingen, DE;
MTU Friedrichshafen GmbH, Friedrichshafen, DE;
Abstract
A method for detecting a preinjection in an internal combustion engine with a common-rail system, including individual accumulators, in which an individual accumulator pressure distribution is detected in a measurement interval and is used to determine an injection end of the main injection, in which a virtual injection start of the main injection is computed by a mathematical function as a function of the injection end, and in which the virtual injection start is set as the actual injection start of the main injection. With the preinjection activated, an actual injection delay for the main injection is determined as a function of the actual injection start, an injection delay deviation of a set injection delay from the actual injection delay is computed, and the injection delay deviation is used to determine whether a preinjection has occurred.