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Video Ignition
Video Ignition-troubleshooting
Video Ignition 1
Video Ignition 2
Video Ignition 3
Video Ignition 4
Video Ignition 5
Video Ignition 6
Video Ignition 7
Video Ignition 8
Video Ignition 9
Video Ignition 10
Video Ignition 11
Video Spark Ignition
Video Dwell Angel
Video Dwell Time
Video Double-spark Coil
Video Single-spark Coil
Video Twin-spark ignition
Video Multi-ignition
Video Injection Shut-off
Video Ignition Coil
Video Ignition Coil Test
Video Spark Plug
Video New plug thread
Video Trans. Ignition System
Video Coil Ignition System
Video Sec. circuit voltage
Video Hall-sensor
Video Induktive Pulse Gen.
Video Reference mark sensor
Video Centrif. Adv. Dev. 1
Video Centrif. Adv. Dev. 2
Video Ignition Advance
Video Knock sensor
Video Reference mark
Video Capacitor 1
Video Capacitor 2
Video Contact-breaker P. 1
Video Contact-breaker P. 2
Video Distributor
Video Distributor Cap
Video Magneto ignition

Video Ignition 1
Video Ignition 2

          A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Transistor-Coil Ignition System


In the transistor coil-ignition system the ignition timing remains unchanged through a non-contact ignition trigger, thus avoiding wear and tear and servicing- and repair costs. Compared with the coil-ignition with interrupter contact, it has a higher ignition voltage providing better starting when hot and cold. It is also less sensitive to dirty spark plugs.


In contrast to the conventional coil-ignition with interrupter contact and condenser, an inductive sensor (left) or a Hall-effect sensor (right) is built in. The Hall-effect sensor requires a power supply and has three wires, the inductive pick-up generates a voltage, thus requirung only two wires.

The Hall-effect sensor features an air-space or a shielding metal part between the Hall-effect IC (blue) and a magnet (red) depending on the position of the segment rotor. The voltage on the control wire changes accordingly. If metallic material is placed in the space between the magnet and the Hall-effect IC, no Hall-effect voltage is present and the primary current is switched on. When the material leaves the space the primary current is switched off and the ignition is triggered. The segment rotor determines the maximum possible dwell-angle, which is substantially reduced however, e.g., when idling. The number of segments is determined by the number of cylinders.

In the inductive sensor there is a star-shaped rotor, this generates an alternating current in the coil. From this, at first, the control unit generates a rectangular wave signal, then at a certain point, through the amplifier, switches off the primary current (point of ignition).

The duration of this activation is determined by the dwell angle regulation. The dwell angle is selected so that, e.g., the current flow remains below 10 A, because the now suitable coils have less resistance compared with the earlier ones. In addition, the dwell angle becomes smaller and smaller as the RPM rises. When the engine is running with little rews, the ignition coil current is deminished (standby current regulation). All in all, the wasting of energy through greater heat development and also the possibility of defects occurring, is thereby avoided. 08/11               Top of page               Index
2001-2015 Copyright programs, texts, animations, pictures: H. Huppertz - E-Mail
Translator: Don Leslie - Email:

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