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:
Jun. 18, 2002
Filed:
May. 08, 2000
Applicant:
Inventors:
Michael Livshiz, Ann Arbor, MI (US);
Scott J. Chynoweth, Fenton, MI (US);
Rodney J. Rhodes, Pinckney, MI (US);
Assignee:
General Motors Corporation, Detroit, MI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01M 1/500 ;
U.S. Cl.
CPC ...
G01M 1/500 ;
Abstract
A method of controlling the coastdown of a vehicle is provided. A base engine speed reference is determined. A speed of the vehicle is sensed, and a target engine speed is generated from the base engine speed reference and the speed of the vehicle. An actual engine speed is sensed, and a desired throttle position is determined as a difference between the target engine speed and the actual engine speed. A desired spark advance for the engine is determined as a difference between the target engine speed and actual engine speed.