Patent ID: 9658082
Date: 2017-05-23
CPC Classifications: F02D,G01D

Claim:
1. A method for determining an absolute angular position of a crankshaft target of an internal combustion engine including a plurality of teeth utilizing a sensor for acquiring at least one signal representing passage of each tooth in front of the sensor as a function of time, comprising: i. during running of the engine determining a period of a tooth while increasing angular resolution of the at least one signal by generating over the period a higher-resolution signal representing passage of fractions of each tooth in front of the sensor as a function of time and generating an absolute angular position from the signal and from the period; ii. during stopping the engine, when determination of the period is no longer possible, determining a number of teeth continuously passing in front of the sensor; and iii. during restarting the engine, using the determined number of the teeth to reduce a synchronization time to acquire the absolute angular position of the crankshaft target.