| 123 / | HD | INTERNAL-COMBUSTION ENGINES |
|
| FOR 101 |  | SPARK IGNITION TIMING CONTROL (123/406) {16} |
| FOR 102 | DF | .~> Vacuum timing control (123/407) {4} |
| FOR 107 | DF | .~> Barometric pressure responsive controller (123/412) |
| FOR 108 | DF | .~> By mechanical or hydraulic link to throttle valve or accelerator (123/413) |
| FOR 109 | DF | .~> Having engine shaft position sensor (123/414) |
| FOR 110 | DF | .~> Analog electronic control (123/415) |
| FOR 111 | DF | .~> Digital electronic control (123/416) {1} |
| FOR 113 | DF | .~> Speed responsive (123/418) {2} |
| FOR 116 | DF | .~> Ambient or engine temperature responsive (123/421) |
| FOR 117 | DF | .~> Acceleration responsive (123/422) |
| FOR 118 | DF | .~> Deceleration responsive (123/423) |
| FOR 119 | DF | .~> Starting or cold running condition responsive (123/424) |
| FOR 120 | DF | .~> Cylinder pressure or cylinder temperature responsive (123/425) |
| FOR 121 | DF | .~> Feedback correction (123/426) |
| FOR 122 | DF | .~> Timing control derived from ignition capacitor (123/427) |
| FOR 123 | DF | .~> Having circuit that alters response of an oscillatory engine shaft position sensing circuit (123/428) |
| FOR 124 | DF | .~> Exhaust gas used with the combustible mixture (e.g., emission control (e.g.r. valve) (123/568) {3} |