FIELD: internal combustion engines.
SUBSTANCE: described are systems and methods for reducing the toxicity of nitrous oxide exhaust gases. Nitrous oxide formed in the exhaust system of a diesel hybrid vehicle is routed through an oxidation catalyst heated by an external source such as an electric heater. Then, the catalyst is heated from the external source to reduce nitrous oxide formation within the exhaust system by increasing the catalyst temperature above a temperature range associated with nitrous oxide generation.
EFFECT: invention relates to the purification of internal combustion engine exhaust gases.
20 cl, 10 dwg
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