Internal-combustion engines – Charge forming device – Including exhaust gas condition responsive means
Patent
1994-12-27
1996-02-20
Wolfe, Willis R.
Internal-combustion engines
Charge forming device
Including exhaust gas condition responsive means
123687, F02D 4114
Patent
active
054921066
ABSTRACT:
An Electronic Engine Controller (EEC) is calibratable to control the rate at which fuel is delivered to an intake of an internal combustion engine in order to achieve a bias in the air/fuel ratio combusted by the engine. The EEC operates under closed-loop control to alter the fuel delivery rate in response to an output of an oxygen sensor which detects the concentration in exhaust gas produced by the engine. The EEC achieves a predetermined bias, in the air/fuel ratio, which is in a rich or lean direction from stoichiometry, by maintaining the fuel delivery rate at a jump value upon the indication by the oxygen sensor of an air/fuel ratio in the same direction from stoichiometry as the desired bias. The fuel delivery rate is maintained at the jump value for a variable period of time, which preferably depends upon the engine speed and load. Upon expiration of the variable period of time, the fuel delivery rate is abruptly altered to a fuel delivery rate corresponding to a predetermined air/fuel ratio. The fuel delivery rate is thereafter progressively altered until the indication by the oxygen sensor of an air/fuel ratio in the same direction from stoichiometry as the desired bias.
REFERENCES:
patent: 4121554 (1978-10-01), Sueishi et al.
patent: 4143623 (1979-05-01), Norimatsu et al.
patent: 4690121 (1987-09-01), Kawanabe et al.
patent: 4858581 (1989-08-01), Hosoi et al.
patent: 4905650 (1990-03-01), Mausner
patent: 5050560 (1991-09-01), Plapp
patent: 5220904 (1993-06-01), Miyashita et al.
patent: 5249130 (1993-09-01), Mamiya et al.
patent: 5291873 (1994-03-01), Hirschmann et al.
patent: 5375583 (1994-12-01), Meyer et al.
Hideaki Katashiba et al., "Fuel Injection Control Systems that Improve Three Way Catalyst Conversion Efficiency," SAE International, International Congress and Exposition, Feb. 25-Mar. 1, 1991.
Douglas R. Hamburg et al., "A Closed-Loop A/F Control Model for Internal Combustion Engines," Society of Automotive Engineers, Inc. Passenger Car Meeting, Jun. 9-13, 1980.
Farmer Dave G.
Patel Shailesh N.
Sharma Vipon K.
Abolins Peter
Ford Motor Company
May Roger L.
Wolfe Willis R.
LandOfFree
Jump-hold fuel control system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Jump-hold fuel control system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Jump-hold fuel control system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1350692