US PATENT SUBCLASS 123 / 568.25
.~.~.~.~ Vacuum actuator control of EGR valve


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}
568.21  DF  .~.~ Having electrically actuated control means {3}
568.23  DF  .~.~.~ Having rotary actuator control of EGR valve {2}
568.25.~.~.~.~ Vacuum actuator control of EGR valve


DEFINITION

Classification: 123/568.25

Vacuum actuator control of EGR valve:

(under subclass 568.23) Subject matter wherein the electrically powered adjusting means regulates the flow of a fluid through a passage connected to an expansible chamber of negative fluid pressure and the negative fluid pressure in the chamber is used to actuate the closing element to vary the flow of the products of combustion.