Patent ID: 6164063
Filing Date: 2000-12-26
Classification: F01N,F02D,F02M

Abstract:
An apparatus for reducing the harmful exhaust gas emissions of an engine having an air intake, an exhaust gas flow stream from the engine, and an exhaust passage for carrying the exhaust gas flow stream from the engine to the atmosphere, wherein a first segment of the exhaust gas flow stream contains harmful constituents and a second segment of the exhaust gas flow stream contains non-harmful constituents, wherein said first segment is downstream of said second segment, comprising;a conduit having a length, a diameter and a substantially fixed volume, and a third segment of gas having non-harmful constituents occupying said conduit before the inflow of the first segment of exhaust gas containing harmful constituents,one or more valves for preventing said first segment from flowing to the atmosphere and for directing said first segment into said conduit wherein said first segment of the exhaust gas flow stream containing harmful constituents is retained,said conduit having a length and diameter effective for retaining said first segments of said exhaust gas flow stream substantially upstream of said third segment of gas inside of said conduit during inflow of said first segment into said conduit,and means for recycling said first segment of the exhaust gas flow stream containing harmful constituents from said conduit to the engine, wherein said harmful constituents in said first segment of the exhaust gas flow stream are reduced.