US PATENT SUBCLASS 123 / 339.19
.~.~.~ By engine speed error feedback

Current as of: June, 1999
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123 /   HD   INTERNAL-COMBUSTION ENGINES

319  DF  ENGINE SPEED REGULATOR {16}
339.1  DF  .~ Idle speed control {5}
339.14  DF  .~.~ Electrically operated control means {6}
339.19.~.~.~ By engine speed error feedback {4}
339.2  DF  .~.~.~.~> Dynamic state variable model
339.21  DF  .~.~.~.~> And integral or derivative control
339.22  DF  .~.~.~.~> And temperature responsive
339.23  DF  .~.~.~.~> Controlling throttle bypass

DEFINITION

Classification: 123/339.19

By engine speed error feedback:

(under subclass 339.14) Subject matter wherein the electrically powered adjusting means (a) measures an actual minimum engine output shaft operating speed, (b) compares the measured output shaft operating speed to a target minimum output shaft operating speed, and (c) adjusts the measured output shaft operating speed to achieve the target minimum output shaft operating speed.

SEE OR SEARCH THIS CLASS, SUBCLASS:

352+, for electrical sensing or regulating of engine speed with the engine being part of a closed loop condition responsive feedback system and an error signal producing circuit.

395+, for an open loop condition responsive speed regulator system for an engine.