US PATENT SUBCLASS 123 / 568.2
.~.~ Plural EGR valves in the recirculation passage

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}
568.2.~.~ Plural EGR valves in the recirculation passage

DEFINITION

Classification: 123/568.2

Plural EGR valves in the recirculation passage:

(under subclass 568.11) Subject matter wherein a conduit returns the products of combustion to the combustion chamber and the conduit includes more than one closing element that regulates fluid flow through the EGR conduit.