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Extending operating range of a homogeneous charge compression ignition engine via cylinder deactivation

United States Patent

May 27, 2008
View the Complete Patent at the US Patent & Trademark Office
An HCCI engine has the ability to operate over a large load range by utilizing a lower cetane distillate diesel fuel to increase ignition delay. This permits more stable operation at high loads by avoidance of premature combustion before top dead center. During low load conditions, a portion of the engines cylinders are deactivated so that the remaining cylinders can operate at a pseudo higher load while the overall engine exhibits behavior typical of a relatively low load.
Hergart; Carl-Anders (Peoria, IL), Hardy; William L. (Peoria, IL), Duffy; Kevin P. (Metamora, IL), Liechty; Michael P. (Chillicothe, IL)
Caterpillar Inc. (Peoria, IL)
11/ 498,001
August 2, 2006
GOVERNMENT RIGHTS This invention was made with Government support under DOE Contract No. DE-FC26-05NT4 2412 awarded by the U.S. Department of Energy. The Government has certain rights to this invention.