US PATENT SUBCLASS 60 / 278
.~ Material from exhaust structure fed to engine intake

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}
278.~ Material from exhaust structure fed to engine intake {1}
279  DF  .~.~> Separated reactive constituent of exhaust fed to engine

DEFINITION

Classification: 60/278

(under subclass 272) Apparatus having (1) structure by which a part of the gas discharged from the combustion chamber is returned to become a constituent of the engine feed and another part is handled or treated as it is discharged as exhaust gas or (2) structure by which the combustion chamber discharge gas is cooled, purified or separated; and a part of the cooled, purified or separated engine discharge is returned as engine feed and another part is discharged as exhaust gas.

SEE OR SEARCH CLASS

123, Internal-Combustion Engines,

568.11, for an internal combustion engine having means to return a part of the exhaust gas switching, therefrom back to the engine intake and wherein no means are provided to treat said gas.