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Fumigation system for a diesel engine

  • US 6,901,889 B1
  • Filed: 03/10/2004
  • Issued: 06/07/2005
  • Est. Priority Date: 03/10/2004
  • Status: Active Grant
First Claim
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1. A gaseous-fuel fumigation system for interconnection to a diesel engine, comprising:

  • a first valve disposed in a flow path between a gaseous-fuel supply and an air intake stream of a diesel engine, the first valve being operative to regulate a flow volume of a gaseous-fuel through the flow path based on a load level associated with the engine;

    a second valve, disposed in series with the first valve in the flow path, the second valve being operative to regulate the flow volume of the gaseous-fuel through the flow path based at least in part on an oxygen content of exhaust gases in an exhaust stream of the engine.

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