EXHAUST EMISSION CONTROL

A method of operating an internal combustion engine (20) in order to improve the control of the level of emissions in the exhaust gases, comprising the steps of, at least when the engine (20) is operating under idle and/or low load conditions at a temperature below a predetermined value, applying a...

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Bibliographic Details
Main Author SMITH, DARREN ANDREW
Format Patent
LanguageEnglish
French
Published 24.10.2000
Edition5
Subjects
BLASTING
COMBUSTION ENGINES
COMBUSTION ENGINES IN GENERAL
CONTROLLING COMBUSTION ENGINES
ENGINE PLANTS IN GENERAL
GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNALCOMBUSTION ENGINES
GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES ORENGINES IN GENERAL
HEATING
HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
INTERNAL-COMBUSTION PISTON ENGINES
LIGHTING
MACHINES OR ENGINES IN GENERAL
MECHANICAL ENGINEERING
STEAM ENGINES
SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF
WEAPONS
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Summary:A method of operating an internal combustion engine (20) in order to improve the control of the level of emissions in the exhaust gases, comprising the steps of, at least when the engine (20) is operating under idle and/or low load conditions at a temperature below a predetermined value, applying a parasitic load to the engine (20) to increase engine fuel demand, and increasing fueling rate to the engine (20) in response to said engine fuel demand to thereby raise the temperature of the exhaust gases. The method may further comprise the steps of raising the temperature of the air being inducted into the engine (20) and/or directly heating a catalyst (25) in the engine exhaust system (24), conveniently by respective heater elements (23, 25) coupled to an alternator (27) driven by the engine (20).
Bibliography:Application Number: CA19912075939