Steven C Swanson

US Patent:

53755774, Dec 27, 1994

Filed:

Jul 23, 1993

Appl. No.:

8/096742

Inventors:

Edward H. Betts - Chillicothe IL
William A. Calliss - Washington IL
Phillip J. Houtz - Lafayette IN
Clark C. Schweigert - Tremont IL
Steven C. Swanson - Peoria IL
Shawn J. Weck - Edwards IL
Brian R. Weller - Lafayette IN

Assignee:

Caterpillar Inc. - Peoria IL

International Classification:

F02D 4126

US Classification:

123480

Abstract:

An engine control system is provided which calculates an optimum air/fuel ratio by minimizing the smoke produced by the engine while at the same time maximizing the engine response time for all altitudes over which the engine operates. The control system includes a microprocessor, an ambient pressure sensor, fuel injectors, and storage means. A manual adjustment is provided that allows an operator to manually adjust the air/fuel ratio within certain pre-defined limits of the optimum value.

US Patent:

62096826, Apr 3, 2001

Filed:

Feb 11, 2000

Appl. No.:

9/502474

Inventors:

Joseph F. Duffy - Metamora IL
Lionel A. Martin - Hopedale IL
Steven C. Swanson - Peoria IL

Assignee:

Caterpillar Inc. - Peoria IL

International Classification:

B60R 300

US Classification:

182127

Abstract:

Access to an operator station of a large track-type tractor is provided by a ladder support structure pivotally attached to a portion of the radiator guard of the tractor. The ladder support structure extends over a track of the tractor and has a ladder pivotally attached to a distal end of the ladder support structure that provides steps over a push arm and a tilt cylinder of the tractor. When the ladder assembly is moved to its carry position, the ladder is moved to a position inside the ladder support structure, and the ladder support structure raised to a vertical position adjacent a side panel of the radiator guard of the tractor. The present invention avoids the problem of machine operators climbing on the push arms, tilt cylinders, radiator, radiator guard, track, hood, and engine enclosures in order to gain access to the operator station.