Patent ID: 9435277
Filing Date: 2016-09-06
CPC Classification: F02D,F02P

Claim Text:
1. A calibration device for calibrating a crank angle of a combustion engine, wherein the calibration device is operatively connectable to a trigger wheel signal evaluation unit of the combustion engine for receiving trigger wheel angles and to one or more pressure sensors of the combustion engine for receiving in-cylinder pressure values, wherein the trigger wheel signal evaluation unit is operatively connected to a trigger wheel sensor and configured to determine a trigger wheel angle, which is a measure of the instantaneous angle of rotation of a trigger wheel, by evaluating the trigger wheel signal, wherein the trigger wheel is connected to and arranged to rotate with a crank shaft of the combustion engine, wherein the at least one pressure sensor is an in-cylinder pressure sensor, which is configured to measure pressures inside a cylinder of the combustion engine and to generate in-cylinder pressure values, wherein the calibration device comprises wherein said calibration device is further configured to provide the determined trigger wheel angle as the trigger wheel angle offset to be stored in an offset memory unit of the combustion engine, wherein the trigger wheel angle offset enables a fuel and spark scheduling unit of the combustion engine to determine a crank angle, which is a measure of the instantaneous angle of rotation of the crank shaft of the combustion engine, by correcting the measured trigger wheel angle on the basis of the stored trigger wheel angle offset.