Patent ID: 9086023
Filing Date: 2015-07-21
Classification: F02D,G01L,G01M

Abstract:
1. A method for recognizing an uncontrolled combustion in an internal combustion engine which occurs independently of an ignition by a spark plug, the uncontrolled combustion occurring at least one of prior to ignition by the spark plug and prior to a normal combustion initiation for a given ignition point, the method comprising: determining a rotational speed of a crankshaft of the internal combustion engine, which is influenced by pressure oscillations in a combustion chamber triggered by the combustion; as a function of the determined rotational speed, ascertaining a parameter which characterizes the combustion, wherein the parameter is of gas torques in which a variation over time is divided into at least two ranges; computing a final integral value for each range; comparing at least one of: deducing a presence of the uncontrolled combustion in response to a determination of a deviation in the comparing step.