Engine cylinder-to-cylinder variation control

Details Engine cylinder-to-cylinder variation control Engine cylinder-to-cylinder variation control

2007-02-20

2007-02-20

Kamen, Noah P. (Department: 3747)

Internal-combustion engines

Charge forming device

Including cylinder pressure or temperature responsive means

C123S02700A

Reexamination Certificate

active

11263173

ABSTRACT:
A control system and method for balancing output and exhaust emission values of the various cylinders of an engine having individual cylinder fuel delivery control. Selected output and emission related values for one cylinder, selected as a base cylinder, are compared to the same values for the other cylinders, and fuel injection quantity and timing (or another combustion phasing variable) are adjusted in the other cylinders to output and emission values of the base cylinder. The adjustments are weighted based on the degree to which changes in both the injection quantity and timing (or other variable) influence changes in both the output and emission values as determined from the sensed readings of pressure sensors in each of the cylinders.

REFERENCES:
patent: 7073485 (2006-07-01), Truscott et al.
patent: 2005/0039721 (2005-02-01), Truscott et al.

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