| A | B |
|---|
| Triggering Device | Any of three electronic devices which send a signal current to the ignition module which then breaks the primary circuit. |
| Hall - Effect Switch | Device mounted in distributor or crankshaft, is a thin wafer of semiconductor material with a voltage applied to it. |
| Shutter | Hall-Effct. Sw. part falls between magnetic fld. & sensor causing voltage output to be reduced. |
| Optical Sensor | A unit made up of a Light Emitting Diode & a Photo Sensitive Diode. |
| Light Emitting Diode | (LED)A special function diode that lights when forward biased. |
| Photo Sensitive Diode | A semiconductor device that allows current to flow when exposed to light. |
| Distributorless Ignition System | Computer controlled ignition system that uses a sensor mounted on the crank/cam shaft to provide timing instead of a distributor. |
| Crankshaft Position Sensor | Similar to Hall Effect Switch but used to monitor crankshaft position/speed. |
| Waste Spark | A spark made by a distributorless or direct igtn. system in a cyl. during the exhst. stroke. |
| Integrated Direct Ignition System | A variation of the distributorless igntn. sys. uses conductor strips instead of wires to direct elec. from coils to spark plugs. |
| Direct Ignition System | Similar to distributorless Igtn. Sys. except there is a coil for each spark plug and the coil towers are connected directly to the plugs. |
| Secondary Circuit | The high voltage portion of the ignition system. |
| Spark Plug | A device containing two electrodes across which electricity jumps to create a spark. |
| Electrode | The insulated center and rod attached to the center of a spark plug. |
| Gap | The space between the spark plug's center and side electrodes. |
| Spark Plug Insulator | Must be able to resist heat, cold, chemical corrision, sudden voltage changes, vibration , & physical shock. |
| Shell | The steel jacket containing the center electrode and insulator of a spark plug. |
| Fouled | The deposits that build up on a spark plug that runs too cold. |
| Preignition | the ignition of hot carbon deposits igniting before the plug fires if it's running too hot. |
| Heat Range | Rating given for the operating temperature of spark plugs. |
| Trigger Wheel | aka:a Reluctor. a rotating tooth assembly. |
| Magnetic Pickup (b) | Is mounted in the distributor and reacts to distributor speed (one half of crankshaft speed) & generates a.c. |
