US PATENT SUBCLASS 123 / 568.26
.~.~.~ Having electromechanical 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}
568.26.~.~.~ Having electromechanical actuator control of EGR valve {1}
568.27  DF  .~.~.~.~> Controlling vacuum actuator {1}

DEFINITION

Classification: 123/568.26

Having electromechanical actuator control of EGR valve:

(under subclass 568.21) Subject matter wherein the means to

return the products of combustion includes a closing element that controls fluid flow through the EGR passage (a) either by (1) closing the passage or (2) restricting the EGR passage by a definite predetermined motion of the closing element, and (b) the closing element being adjusted by means of electrical energy.

SEE OR SEARCH CLASS

251, Valves and Valve Actuation,

129.01+, for electrically operated valves of general utility.