Internal-combustion engines – Spark ignition timing control – Electronic control
Reexamination Certificate
2008-10-14
2010-06-01
Moulis, Thomas N (Department: 3747)
Internal-combustion engines
Spark ignition timing control
Electronic control
C123S406230, C123S435000, C073S114110, C073S114160
Reexamination Certificate
active
07726281
ABSTRACT:
A control module comprising a cylinder torque determination module that determines an indicated torque for a cylinder in an engine based on a pressure in the cylinder, a cylinder torque balancing module that determines a derivative term for the cylinder based on rotation of a crankshaft, and a cylinder pressure error detection module that detects a pressure error for the cylinder based on the indicated torque and the derivative term. A method comprising determining an indicated torque for a cylinder in an engine based on a pressure in the cylinder, determining a derivative term for the cylinder based on rotation of a crankshaft, and detecting a pressure error for the cylinder based on the indicated torque and the derivative term.
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U.S. Appl. No. 11/432,446, filed May 11, 2006, Kenneth J. Buslepp.
Buslepp Kenneth J.
Dulzo Joseph R.
Mathews David S.
Verner Douglas R.
GM Global Technology Operations Inc.
Moulis Thomas N
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