Title:
EQUIVALENCE RATIO-BASED SYSTEM FOR CONTROLLING TRANSIENT FUELING IN AN INTERNAL COMBUSTION ENGINE
Document Type and Number:
WIPO Patent Application WO2002061243
Kind Code:
A3
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 ( phi >MAX<). The engine controller is then operable to determine an oxygen/fuel control (OFC) limited fueling command (F>OFCI<) 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>OFCL<). In one embodiment, the engine controller is operable to fuel the engine according to a minimum of the OFC limited fueling command F>OFCL<) and a default fueling command F>DEF<) although other fuel limiting strategies are contemplated.
Inventors:
MILLER PAUL R (US)
HE CHUAN (US)
HE CHUAN (US)
Application Number:
PCT/US2002/002376
Publication Date:
November 14, 2002
Filing Date:
January 28, 2002
Export Citation:
Assignee:
CUMMINS INC (US)
MILLER PAUL R (US)
HE CHUAN (US)
MILLER PAUL R (US)
HE CHUAN (US)
International Classes:
F02D21/08; F02D41/14; F02B29/04; F02M25/07; (IPC1-7): F02D41/10; F02D41/40
Foreign References:
| EP1001153A1 | 2000-05-17 | |||
| US6012431A | 2000-01-11 | |||
| EP1024275A2 | 2000-08-02 |
Download PDF: