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:
Mar. 06, 2001
Filed:
Jul. 15, 1999
Dusan M. Janic, Columbus, OH (US);
Randal L. Bergstedt, Columbus, OH (US);
Other;
Abstract
A system for controlling fueling signals provided to a fueling system of an internal combustion engine operates to eliminate the throttle deadband when the engine speed is limited to speeds less than the maximum engine speed. In one embodiment, the engine control module is modified to incorporate an additional throttle factor operable to scale the calculated throttle derived from the operator commanded throttle position. In one aspect of the invention, this throttle factor is a function of the ratio of the difference between a user-requested high idle breakpoint speed and the minimum engine speed, and difference between the minimum and maximum engine speeds. Thus, the relationship between engine speed and throttle input is rescaled to eliminate the deadband. Where this relationship is linear, the present invention essentially alters the slope of the line between the minimum and maximum throttle positions. The resulting rescaled commanded throttle value is then fed to the routines within the ECM that calculate a fueling command as a function of current engine speed and commanded throttle.