Sean R Strubhar

US Patent:

6728625, Apr 27, 2004

Filed:

Sep 27, 2002

Appl. No.:

10/256627

Inventors:

Sean R. Strubhar - East Peoria IL
William C. Boley - Lafayette IN

Assignee:

Caterpillar Inc - Peoria IL

International Classification:

F02M 2507

US Classification:

701104, 701102, 123480, 123676

Abstract:

Apparatus and methods for determining a desired charge density for an engine having an inlet air pathway. A first characteristic indicative of an engine speed of the engine is determined. A second characteristic indicative of a load on the engine is determined. A third characteristic indicative of a humidity of air in the inlet air pathway. A value indicative of a desired charge density of a combustion mixture for the engine is determined as a function of the first, second, and third characteristics.

US Patent:

6662795, Dec 16, 2003

Filed:

Aug 20, 2001

Appl. No.:

09/933544

Inventors:

Darryl D. Baldwin - Lacon IL
Sean R. Strubhar - East Peoria IL
Choy Yap - Dunlap IL

Assignee:

Caterpillar Inc - Peoria IL

International Classification:

F02D 4100

US Classification:

123676, 123677

Abstract:

The present invention is configured to maintain a desired emissions level of an engine having an intake manifold and an exhaust manifold, and an exhaust stack is disclosed. The method includes the steps of establishing a desired emissions level, establishing an engine speed, establishing an engine load, establishing at least one characteristic of one of an intake air and an exhaust gas, and determining a fuel command in response to the engine speed, the engine load, and the desired emissions level, the fuel command resulting in the engine maintaining the desired emissions level.