Patent ID: 6276319
Filing Date: 2001-08-21
Classification: F01L,F02D

Abstract:
A method for evaluating a combustion chamber pressure in an internal combustion engine having at least one cylinder pressure sensor, which measures a cylinder pressure, and one crankshaft angle sensor, which outputs a signal representative of a crankshaft position, and one evaluation device, including at least one microprocessor, to which signals of the sensors are supplied, in which the microprocessor, from a course of the combustion chamber pressure as a function of the crankshaft angle position, concludes that at least one of valve control times ""outlet opens"", ""outlet closes"", ""inlet opens"", ""inlet closes"" exists with respect to the crankshaft angle position, characterized in that measurements are performed during normal engine operation, and incident combustion chamber pressure courses or events which depend on the combustion chamber pressure course and which characterize the valve control times are evaluated.