US PATENT SUBCLASS 60 / 304
.~.~ Oxidizer feed passage at engine exhaust valve, manifold or port

Current as of: June, 1999
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60 /   HD   POWER PLANTS

272  DF  INTERNAL COMBUSTION ENGINE WITH TREATMENT OR HANDLING OF EXHAUST GAS {18}
282  DF  .~ By means producing a chemical reaction of a component of the exhaust gas {13}
304.~.~ Oxidizer feed passage at engine exhaust valve, manifold or port {2}
305  DF  .~.~.~> Distributed to plural individual ports or valves
306  DF  .~.~.~> To port zone and downstream of port

DEFINITION

Classification: 60/304

(under subclass 282) Apparatus including structure by which air is fed to the exhaust gas at a region immediately associated with an engine exhaust valve or port, whereby the high temperature produced by combustion in the engine produces the reaction.