Method and apparatus for heating a catalytic converter to reduce emissions
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United States of America Patent
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Sep 29, 1998
Grant Date -
N/A
app pub date -
Oct 7, 1994
filing date -
Oct 7, 1994
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A mixture of hydrogen and air is introduced onto the face of the catalytic monolith of a catalytic converter in the exhaust line of a cold internal combustion engine. The hydrogen spontaneously combusts, thereby pre-heating the catalytic converter. Pre-heating the catalytic converter significantly improves the effectiveness of the catalytic converter in eliminating undesirable emissions of the internal combustion engine. The hydrogen is preferably produced on-board the vehicle using the system. The hydrogen source may also be coupled to the internal combustion engine to be burned by the engine during startup in the absence of gasoline to minimize the production of unacceptable emissions while the catalyst is brought up to light-off temperature.
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