123 / | HD | INTERNAL-COMBUSTION ENGINES |
434 | DF | CHARGE FORMING DEVICE (E.G., POLLUTION CONTROL) {29} |
672 | DF | .~ Including exhaust gas condition responsive means {11} |
679 | DF | .~.~ Combined with engine condition responsive means {6} |
681 | DF | .~.~.~ Engine load responsive {3} |
683 | .~.~.~.~ Throttle position responsive |