Internal-combustion engines – Charge forming device – Including exhaust gas condition responsive means
Reexamination Certificate
2002-06-04
2004-05-18
Solis, Erick (Department: 3747)
Internal-combustion engines
Charge forming device
Including exhaust gas condition responsive means
C123S443000, C123S1980DB, C701S109000
Reexamination Certificate
active
06736120
ABSTRACT:
BACKGROUND OF INVENTION
1. Field of the Invention
The field of the invention relates generally to adaptive learning for engine exhaust gas sensors.
2. Background of the Invention
Engine control systems utilize adaptive learning to correct sensor readings, or compensate for component wear. In particular, exhaust gas sensors coupled to an engine exhaust are typically used for such adaptive learning. For example, the sensor reading can be used to correct for air-flow measurement errors, and changes in fuel injectors due to aging.
The inventors herein have developed an engine control methodology that allows efficient engine operation with some of the cylinders inducting air with no injected fuel. The inventors have also found that when using such a system with conventional adaptive learning methods, degraded results are obtained. For example, when the system includes exhaust gas sensors exposed to air from cylinders without injected fuel, there is no information as to the amount of fuel injected into other cylinders, and thus no information to be had from that adaptation algorithm. As such, when the algorithm attempts to incorporate this sensor data, degraded results are obtained.
SUMMARY OF INVENTION
The above problem is solved by a system comprising an engine having a first and second group of cylinders, a sensor coupled to at least one of the first and second groups, and a controller for operating the engine in two modes. In a first mode, the engine is operated with a mixture of air and substantially no injected fuel in the first combustion group and with air and injected fuel in the second combustion group and in a second mode the engine is operated where both of the first and second groups combust a mixture of air and injected fuel. The controller disables adaptive learning of the sensor during the first mode and enables adaptive learning during the second mode.
In particular, by disabling adaptive learning from the sensor that is exposed only to air from cylinders without injected fuel, the adaptation algorithm can operate properly.
REFERENCES:
patent: 3696618 (1972-10-01), Boyd et al.
patent: 3969932 (1976-07-01), Rieger et al.
patent: 4033122 (1977-07-01), Masaki et al.
patent: 4036014 (1977-07-01), Ariga
patent: 4178883 (1979-12-01), Herth
patent: 4251989 (1981-02-01), Norimatsu et al.
patent: 4622809 (1986-11-01), Abthoff et al.
patent: 4854123 (1989-08-01), Inoue et al.
patent: 4884066 (1989-11-01), Miyata et al.
patent: 4913122 (1990-04-01), Uchida et al.
patent: 4964272 (1990-10-01), Kayanuma
patent: 5009210 (1991-04-01), Nakagawa et al.
patent: 5088281 (1992-02-01), Izutani et al.
patent: 5097700 (1992-03-01), Nakane
patent: 5165230 (1992-11-01), Kayanuma et al.
patent: 5174111 (1992-12-01), Nomura et al.
patent: 5189876 (1993-03-01), Hirota et al.
patent: 5201802 (1993-04-01), Hirota et al.
patent: 5209061 (1993-05-01), Takeshima
patent: 5222471 (1993-06-01), Stueven
patent: 5233830 (1993-08-01), Takeshima et al.
patent: 5267439 (1993-12-01), Raff et al.
patent: 5270024 (1993-12-01), Kasahara et al.
patent: 5272871 (1993-12-01), Oshima et al.
patent: 5325664 (1994-07-01), Seki et al.
patent: 5331809 (1994-07-01), Takeshima et al.
patent: 5335538 (1994-08-01), Blischke et al.
patent: 5357750 (1994-10-01), Ito et al.
patent: 5377484 (1995-01-01), Shimizu
patent: 5402641 (1995-04-01), Katoh et al.
patent: 5410873 (1995-05-01), Tashiro
patent: 5412945 (1995-05-01), Katoh et al.
patent: 5412946 (1995-05-01), Oshima et al.
patent: 5414994 (1995-05-01), Cullen et al.
patent: 5419122 (1995-05-01), Tabe et al.
patent: 5423181 (1995-06-01), Katoh et al.
patent: 5433074 (1995-07-01), Seto et al.
patent: 5437153 (1995-08-01), Takeshima et al.
patent: 5448887 (1995-09-01), Takeshima
patent: 5450722 (1995-09-01), Takeshima et al.
patent: 5452576 (1995-09-01), Hamburg et al.
patent: 5472673 (1995-12-01), Goto et al.
patent: 5473887 (1995-12-01), Takeshima et al.
patent: 5473890 (1995-12-01), Takeshima et al.
patent: 5479898 (1996-01-01), Cullen et al.
patent: 5483795 (1996-01-01), Katoh et al.
patent: 5497745 (1996-03-01), Cullen et al.
patent: 5544482 (1996-08-01), Matsumoto et al.
patent: 5551231 (1996-09-01), Tanaka et al.
patent: 5577382 (1996-11-01), Kihara et al.
patent: 5595060 (1997-01-01), Togai et al.
patent: 5598703 (1997-02-01), Hamburg et al.
patent: 5622047 (1997-04-01), Yamashita et al.
patent: 5626014 (1997-05-01), Hepburn et al.
patent: 5626117 (1997-05-01), Wright et al.
patent: 5655363 (1997-08-01), Ito et al.
patent: 5657625 (1997-08-01), Koga et al.
patent: 5693877 (1997-12-01), Ohsuga et al.
patent: 5713199 (1998-02-01), Takeshima et al.
patent: 5715679 (1998-02-01), Asanuma et al.
patent: 5722236 (1998-03-01), Cullen et al.
patent: 5724808 (1998-03-01), Ito et al.
patent: 5732554 (1998-03-01), Sasaki et al.
patent: 5735119 (1998-04-01), Asanuma et al.
patent: 5740669 (1998-04-01), Kinugasa et al.
patent: 5743084 (1998-04-01), Hepburn
patent: 5746049 (1998-05-01), Cullen et al.
patent: 5746052 (1998-05-01), Kinugasa et al.
patent: 5752492 (1998-05-01), Kato et al.
patent: 5771685 (1998-06-01), Hepburn
patent: 5771686 (1998-06-01), Pischinger et al.
patent: 5778666 (1998-07-01), Cullen et al.
patent: 5792436 (1998-08-01), Feeley et al.
patent: 5802843 (1998-09-01), Kurihara et al.
patent: 5803048 (1998-09-01), Yano et al.
patent: 5832722 (1998-11-01), Cullen et al.
patent: 5842340 (1998-12-01), Bush et al.
patent: 5865027 (1999-02-01), Hanafusa et al.
patent: 5938715 (1999-08-01), Zang et al.
patent: 5970707 (1999-10-01), Sawada et al.
patent: 5974788 (1999-11-01), Hepburn et al.
patent: 5974791 (1999-11-01), Hirota et al.
patent: 5974793 (1999-11-01), Kinugasa et al.
patent: 5983627 (1999-11-01), Asik
patent: 5992142 (1999-11-01), Pott
patent: 5996338 (1999-12-01), Hirota
patent: 6012428 (2000-01-01), Yano et al.
patent: 6014859 (2000-01-01), Yoshizaki et al.
patent: 6014963 (2000-01-01), Narita
patent: 6023929 (2000-02-01), Ma
patent: 6058700 (2000-05-01), Yamashita et al.
patent: 6161531 (2000-12-01), Hamburg et al.
patent: 6189316 (2001-02-01), Surnilla et al.
patent: 6360713 (2002-03-01), Kolmanovsky et al.
patent: 6513509 (2003-02-01), Matsumoto
patent: 2001/0011540 (2001-08-01), Mashiki
patent: 196 07 151 (1997-07-01), None
patent: 0 351 197 (1990-01-01), None
patent: 0 444 783 (1991-09-01), None
patent: 0 503 882 (1992-09-01), None
patent: 0 580 389 (1994-01-01), None
patent: 55-29002 (1980-03-01), None
patent: 55-49549 (1980-04-01), None
patent: 62-97630 (1987-05-01), None
patent: 62-117620 (1987-05-01), None
patent: 64-53042 (1989-03-01), None
patent: 2-30915 (1990-02-01), None
patent: 2-33408 (1990-02-01), None
patent: 2-207159 (1990-08-01), None
patent: 3-135417 (1991-06-01), None
patent: 5-26080 (1993-02-01), None
patent: 5-106493 (1993-04-01), None
patent: 5-106494 (1993-04-01), None
patent: 6-58139 (1994-03-01), None
patent: 6-264787 (1994-09-01), None
patent: 7-97941 (1995-04-01), None
patent: 7-166851 (1995-06-01), None
patent: 98/27322 (1998-06-01), None
Joe Theis et al, “An Air/Fuel Algorithm To Improve The NOx Conversion Of Copper-Based Catalysts”, SAE Technical Paper No. 922251, Oct. 19-22, 1992, pp. 77-89.
Y. Kaneko et al, “Effect of Air-Fuel Ratio Modulation on Conversion Efficiency of Three-Way Catalysts”, Inter-Industry Emission Control Program 2 (IIEC-2) Progress Report No. 4, SAE Technical Paper No. 780607, Jun. 5-9, 1978, pp. 119-127.
Alan F. Diwell, “Engineered Control Strategies For Improved Catalytic Control of NOx in Leam Burn Applications”, SAE Technical Paper No. 881595, 1998, pp. 1-11.
Allen H. Meitzler, “Application of Exhaust-Gas-Oxygen Sensors to the Study of Storage Effects in Automotive Three-Way Catalysts”, SAE 800019, Feb. 25-29, 1980.
W.H. Holl, “Air Fuel Control to Reduce Emissions, I. Engine-Emissions Relationships”, SAE 800051, Feb. 25-29, 1980.
Wei-Ming Wang, “Air-Fuel Control to Reduce Emissions, II. Engine-Catalyst Characterization Under Cyclic Conditions”, SAE 800052, Feb. 25-29, 1980.
Christopher D. De Boer et al., “Engineered Control Strategies for Improved Catalytic Control of NOx in Lean Burn Application
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