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

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


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.