Exhaust emission control system and method having improved heati

Details Exhaust emission control system and method having improved heati Exhaust emission control system and method having improved heati

1993-02-25

1994-06-28

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

Methods

60284, 60286, 60300, F01N 328

Patent

active

053236076

ABSTRACT:
A catalyst purifies an exhaust gas exhaled from an internal combustion engine by catalysis thereof as a result of the exhaust gas passing therethrough. A heating unit heats the catalyst so as to cause the catalyst to perform the desired catalysis. A temperature detector detects the temperature of the catalyst. A deriving unit derives a required heat energy quantity to be applied to the catalyst, by which the temperature of the catalyst reaches an activating temperature so as to perform the desired catalysis, according to the temperature of the catalyst detected through the temperature detector before the internal combustion engine starts. A heat control unit causes the heating unit to stop the heating of the catalyst after the required heat energy has been applied to the catalyst.

REFERENCES:
patent: 3723070 (1973-03-01), Houdry
patent: 4698966 (1987-10-01), Distel
patent: 5224335 (1993-07-01), Yoshizaki
patent: 5257501 (1993-11-01), Wataya

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