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:
Aug. 21, 2001
Filed:
Mar. 23, 2000
Klaus Walter, Bietigheim-Bissingen, DE;
Holger Bellmann, Ludwigsburg, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
A method for evaluating the combustion chamber pressure in an internal combustion engine is described, in which the output signal of at least one cylinder pressure sensor and one crankshaft angle sensor is performed by the control unit of the engine. By analysis of the course of combustion chamber pressure over the crankshaft angle, characteristic pressure courses are obtained for certain valve control times. From these characteristic pressure courses, a conclusion can be drawn as to the valve control times “outlet opens”, “outlet closes”, “inlet opens”, and “inlet closes”, referred to the crankshaft angle.