The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 17, 2001
Filed:
Nov. 16, 1999
David James Haugen, Waterloo, IA (US);
Deere & Company, Moline, IL (US);
Abstract
An internal combustion engine includes a plurality of cylinders, a plurality of fuel injectors, compression brake units operatively associated the cylinders, an engine speed sensor and an engine control unit (ECU) for controlling the fuel injectors and the compression brake unit as a function of at least sensed engine speed. A method of measuring performance of the engine includes running the engine at a specified speed under no load, setting to zero a rate of fuel flow delivered by a selected one of the fuel injectors associated with one of the cylinders associated with the compression brake unit, increasing by a first amount a rate of fuel flow delivered by the other of the fuel injectors so that the engine runs at the specified engine speed, activating the compression brake unit associated with the selected fuel injector so that the cylinder associated therewith absorbs power, and again increasing by a second amount a rate of fuel flow delivered by the other of the fuel injectors so that the engine runs at the specified engine speed. This second amount of fuel flow rate increase thereby represents a performance characteristic of the engine.