| 123 / | HD | INTERNAL-COMBUSTION ENGINES |
| 319 | DF | ENGINE SPEED REGULATOR {16} |
| 349 | DF | .~ Having condition responsive means with engine being part of a closed feedback system (e.g., cruise control) {4} |
| 363 | ![]() | .~.~ Mechanical sensor or regulator {3} |
| 364 | DF | .~.~.~> Fuel injection pump governor (e.g., diesel) {6} |
| 375 | DF | .~.~.~> Fuel injection pressure governor |
| 376 | DF | .~.~.~> Throttle positioning {1} |