US PATENT SUBCLASS 123 / 520
.~.~.~ Purge valve controlled by engine parameter

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}
518  DF  .~ Having fuel vapor recovery and storage system {1}
519  DF  .~.~ Having an adsorbent canister {1}
520.~.~.~ Purge valve controlled by engine parameter {1}
521  DF  .~.~.~.~> Responsive to secondary air pressure

DEFINITION

Classification: 123/520

Purge valve controlled by engine parameter:

(under subclass 519) Subject matter in which a valve means (purge valve) is provided between the canister and the engine, said valve being operable to control the rate at which stored vapors are drawn from the canister in response to an operating condition or parameter of the associated engine.