US PATENT SUBCLASS 123 / 568.13
.~.~ Having recirculation path formed entirely in the cylinder block or head

Current as of: June, 1999
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123 /   HD   INTERNAL-COMBUSTION ENGINES

434  DF  CHARGE FORMING DEVICE (E.G., POLLUTION CONTROL) {29}
568.11  DF  .~ Exhaust gas used with the combustible mixture (e.g., emission control Exhaust Gas Recirculation (EGR) valve) {10}
568.13.~.~ Having recirculation path formed entirely in the cylinder block or head

DEFINITION

Classification: 123/568.13

Having recirculation path formed entirely in the cylinder block or head:

Subject matter under subclass 568.11 wherein the means to return the products of combustion has an EGR conduit which is located completely within a structure that either (a) surrounds the combustion chamber or (b) closes an upper end of the combustion chamber.