US PATENT SUBCLASS 123 / 568.18
.~.~.~ Having a valve located at the outlet of the EGR 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}
568.17  DF  .~.~ Having specific exhaust gas outlet structure at intake manifold {1}
568.18.~.~.~ Having a valve located at the outlet of the EGR passage

DEFINITION

Classification: 123/568.18

Having a valve located at the outlet of the EGR passage:

(under subclass 568.17) Subject matter wherein the means to return the products of combustion includes a mechanical device having a closing element that controls fluid flow through the EGR conduit (a) either by (1) closing the EGR conduit or (2) restricting the EGR conduit by a definite predetermined motion of the closing element, and (b) the closing element being positioned at the point of connection of the EGR conduit to the intake manifold.

SEE OR SEARCH CLASS

251, Valves and Valve Actuation, appropriate subclasses, for specific valve structure of general utility.