David L Peters

US Patent:

7165531, Jan 23, 2007

Filed:

Feb 15, 2005

Appl. No.:

11/058149

Inventors:

Brian Hans Bratvold - New Hartford IA, US
Gary Mark Frodsham - Cedar Falls IA, US
David William Peters - Cedar Falls IA, US

Assignee:

Deere & Company - Moline IL

International Classification:

F02D 31/00
F02D 33/00

US Classification:

123372, 123365

Abstract:

A negative rate shaping torque capsule is provided that effectively reduces torque rise of the engine. The device is part of the mechanical governor and allows fuel control rack position to decrease as engine speed decreases, thus reducing the amount of fuel delivered and reducing torque rise. The device works by the addition of a pivot arm to the existing main governor arm. One end of the pivot arm is pinned to the governor arm, and a roller is pinned to the opposite end. This roller bears on the fuel rack, maintaining rack position. An additional roller is pinned to the side of the pivot arm and bears on the tension arm. The travel of the pivot arm relative to the governor arm is limited in one direction by a physical stop, and in the other direction by a torque capsule (TC) spring. The TC spring is fixed to the governor arm and bears on the pivot arm roller opposite the tension arm. The TC spring holds the pivot arm roller against the tension arm.