US 7,320,308 B1
Method of cylinder pressure sensor data/angle capture for low and high resolution
Clinton W. Erickson, Russiaville, Ind. (US); James E. Walters, Carmel, Ind. (US); and Karl A. Schten, Kokomo, Ind. (US)
Assigned to Delphi Technologies, Inc., Troy, Mich. (US)
Filed on Dec. 05, 2006, as Appl. No. 11/633,951.
Int. Cl. F02M 7/00 (2006.01); F02P 5/00 (2006.01)
U.S. Cl. 123—435  [123/406.41] 20 Claims
OG exemplary drawing
 
1. A method of determining cylinder pressure in internal-combustion engines, the method comprising:
providing an angular position sensor capable of determining an angular position of a rotating engine component;
generating a plurality of angle-based time stamps, each angle-based time stamp comprising an angular position of the rotating engine component and a time value associated with the angular position;
providing at least one sensor capable of determining a cylinder pressure in an internal combustion engine;
generating a plurality of time-based pressure stamps by measuring a cylinder pressure at a plurality of predetermined time intervals, each time-based pressure stamp comprising a cylinder pressure and a time value associated with the cylinder pressure;
utilizing the angle-based time stamps and the time-based pressure stamps to determine cylinder pressures at associated angular positions.