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Internal Combustion Engine Cylinder-to-Cylinder Balancing with Balanced Air-Fuel Ratios

Abstract: 

A method of balancing combustion among cylinders of an internal combustion engine. For each cylinder, a normalized peak firing pressure is calculated as the ratio of its peak firing pressure to its combustion pressure. Each cylinder's normalized peak firing pressure is compared to a target value for normalized peak firing pressure. The fuel flow is adjusted to any cylinder whose normalized peak firing pressure is not substantially equal to the target value.

Patent Number: 
6,981,488
Date Of Issue: 
01/03/2006
Inventors: 

Ralph E. Harris; Gary D. Bourn; Anthony J. Smalley