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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



The single spark ignition coil makes it possible: short loading times and thus multiple ignitions. At the moment they are made use of only during idle running. Because it takes its time, it will probably be restricted for low revs. Besides, the number of ignitions clearly depend on the temperature at the moment, the warmer, the more ignitions per time unit. It is not just about sure ignitions in critical conditions. Even if the first ignition is a success, the subsequent ignitions affect the combustion apparently positively.

How it works

In the Bosch FSA figures the primary voltage is determined as usual between 1 and ground. U- multi is the voltage that is measured between 4a and ground. You can see the diagram in figure 3. How is it possible that an ignition operates with a dwell angle of 3 - 4% (!) (see figure 3). At the moment obviously it is only possible if you use single spark ignition coils which probably feature a slightly faster load energy. Another reason for the small dwell angle is recognizable from every last ignition in all three figures. Here the secondary voltage slowly comes to an end, while they are cut off in the first ignitions "by force". A certain rest voltage is left which can be used for the next quick ignition.               Top of page               Index
2001-2015 Copyright programs, texts, animations, pictures: H. Huppertz - E-Mail
Translator: Don Leslie - Email:

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