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:
Jan. 21, 2003
Filed:
Jan. 31, 2001
Paul R. Miller, Columbus, IN (US);
Chuan He, Columbus, IN (US);
Cummins, Inc., Columbus, IN (US);
Abstract
An equivalence ratio-based system for controlling transient engine fueling includes an engine controller responsive to a number of engine operating conditions to estimate a mass of oxygen trapped within a number of cylinders of an internal combustion engine. The engine controller is further operable to map current values of engine speed and commanded fueling to one of a number of predetermined maximum fuel-to-oxygen, or equivalence, ratio values (&PHgr; ). The engine controller is then operable to determine an oxygen/fuel control (OFC) limited fueling command (F ) as a function of the estimated oxygen mass value and the maximum equivalence ratio, and to limit engine fueling based on the OFC limited fueling command F . In one embodiment, the engine controller is operable to fuel the engine according to a minimum of the OFC limited fueling command F and a default fueling command F , although other fuel limiting strategies are contemplated.