Power plants – Internal combustion engine with treatment or handling of... – Methods
Patent
1996-04-22
1998-01-13
Richter, Sheldon
Power plants
Internal combustion engine with treatment or handling of...
Methods
60276, 60277, F01N 320
Patent
active
057066523
ABSTRACT:
A catalytic converter monitor apparatus comprising: a first temperature sensor mounted in a vehicle exhaust system upstream of a catalytic converter catalyst; a second temperature sensor mounted in the vehicle exhaust system downstream of at least a portion of the catalytic converter catalyst; an exotherm monitor coupled to the first and second temperature sensors, providing an output signal indicative of a quantity of exothermic reaction taking place in the catalytic converter; a table generator coupled to the exotherm monitor, receiving the output signal from the exotherm monitor and generating a table of exotherm criteria responsive to the output signal; and an exotherm analyzer coupled to the exotherm monitor and the table generator, providing an output responsive to a comparison between a present value of the output signal and a corresponding criteria stored in the table.
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patent: 5133184 (1992-07-01), Geiger
patent: 5182907 (1993-02-01), Kuroda et al.
patent: 5303580 (1994-04-01), Schneider et al.
Catalytic Converter Diagnosis Using the Catalyst Exotherm; Joseph R. Theis, AC Delco Systems Division of GMC; SAE #942058; Fuels & Lubricants Meeting & Exposition; Baltimore, MD; Oct. 17-20, 1994.
Calculating the Rate of Exothermic Energy Release for Catalytic Converter Efficiency Monitoring; Joseph S. Hepburn & Allen H. Meitzler; Ford Motor Company; SAE #952423; Fuels & Lubricants Meeting & Exposition; Toronto, Ontario; Oct. 16-19, 1995.
Alternative Technologies for Studying Catalyst Behaviour to Meet OBD II Requirements; Stephen Pelters, Dietmar Schwarzenthal (Porche AG); Wolfgang Maus, Helmut Swars & Rolf Bruck (EMITEC GmbY); SAE #932854; Fuels & Lubricants Meeting & Exposition; Philadelphia, PA; Oct. 18-21, 1993.
Alternatives for Catalyst Condition Monitoring on Gasoline Emission Control Systems; D. Williams (Lucas Auto. Ltd.); B. Bradshaw (Lucas Auto. Ltd.); No. C-422/017; pp. 1-3, Figures 1-6.
A Catalytic Oxidation Sensor for the On Board Detection of Misfire & Catalyst Efficiency; Wei Cai & Nick Collings; University of Cambridge; #922248; pp. 51-62.
A Linear Catalyst Temperature Sensor for Exhaust Gas Ignition (EGI) & On Board Diagnostics of Misfire & Catalyst Efficiency; Nick Collings & Wei Cai (University of Cambridge); Tom Ma (Ford Motor Co.); David Ball (Kidde-Graviner Ltd.); #930938; pp. 167-172.
General Motors Corporation
Richter Sheldon
Simon Anthony Luke
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