MR. JAMES MURRAY JEFFRIES, MD
Radiology at Glen Park Place Rd, Peoria, IL

License number

Illinois 036.131119

Professional information

James Murray Jeffries, Peoria IL

Specialties:

Plastic Surgeon

Address:

4909 N Glen Park Place Rd, Peoria, IL 61614

Education:

University of Medicine and Dentistry of New Jersey, New Jersey Medical School - Doctor of Medicine

Board certifications:

American Board of Plastic Surgery Certification in Plastic Surgery

Glow Plug Alternator Control

US Patent:

4858576, Aug 22, 1989

Filed:

Nov 27, 1987

Appl. No.:

7/231422

Inventors:

James R. Jeffries - East Peoria IL
Michael R. Verheyen - Peoria IL

Assignee:

Caterpillar Inc. - Peoria IL

International Classification:

F02P 1902

US Classification:

123145A

Abstract:

The present invention pertains to a control system for igniting devices (28,30,32,34,36,38) used in an internal combustion engine (24). In order to ignite alcohol fuel in a diesel engine, the fuel must be heated before or during compression. Glow plugs (28,30,32,34,36,38) conveniently provide heat, but have a short life in such continuous applications. Glow plugs must be accurately controlled to prevent overheating, which leads to open-circuiting. Individual constant voltage controls attempt to provide this function, but are only moderately successful. They are costly and complex, and provide only moderate protection from overheating. Since glow plug resistance correlates to glow plug temperature, resistance control provides better protection against glow plug overheating. Therefore, an apparatus (20) monitors the resistance of a single glow plug (28), and controls the resistance of each glow plug to a preselected resistance value. This preselected resistance value represents a glow plug temperature, that provides satisfactory fuel combustion combined with improved glow plug life.