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Catalytic purification of exhaust gases

  • US 2,937,490 A
  • Filed: 08/12/1957
  • Issued: 05/24/1960
  • Est. Priority Date: 08/12/1957
  • Status: Expired due to Term
First Claim
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1. A METHOD FOR AFFECTING RAPID ACTIVATION OF A CATALYTIC EXHAUST PURIFIER CONNECTED TO THE EXHAUST OUTLET FROM A SPARK-FIRED INTERNAL CONBUSTION ENGINE COMPRISING THE STEPS OF CAUSING THE ENGINE TO OPERATE INTERMITTENTLY BY INTERMITTENTLY INTERRUPTING THE NORMAL IGNITION TO THE ENGINE SPARK PLUGS, PASSING THE RAW UNOXIDIZED FUEL-AIR MIXTURE THEREBY EXHAUSTED FROM THE ENGINE CYLINDERS TO A CHAMBER ADJACENT TO AND UPSTREAM FROM A CATALYST BED, IGNITION AND BURNING SAID RAW FUEL-AIR MIXTURE IN SAID CHAMBER, THE RESULTING HOT COMBUSTION PRODUCTS BEING PUMPED BY THE ACTION OF SAID ENGINE THROUGH SAID CATALYST BED CAUSING RAPID HEATING THEREOF, AND DISCONTINUING SAID PROCEDURE WHEN AT LEAST THE INLET PORTION OF SAID CATALYST

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