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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

Ignition Advance


Before fully electronic ignitions were introduced, the ignition time was shifted by a mechanical or pneumatic ignition adjustment in the direction of 'early' depending on a rising load or increasing revs.

Part load advance, because the mixture burns more slowly.

How it works

The centrifugal advance device in the lower part of the distributor twists either the breaker cam, segment rotor (Hall-effect pulse generator) or star (inductive pickup) with rising engine speed against the axle drive shaft in rotation direction. In addition, the ignition can be shifted forward, e.g., by pressing the accelerator pedal, adjusting the vacuum controller. In a restriction near the throttle valve the inlet manifold pressure drops and pulls the diaphragm to the right (left figure). Thus, the plate with the interrupter contact, the Hall-IC or the coils in the inductive pickup are thereby moved against the rotation direction of the distributor shaft. The vacuum adjustment and centrifugal force adjustment in combination can cause an advance of up to 45 .               Top of page               Index
2001-2015 Copyright programs, texts, animations, pictures: H. Huppertz - E-Mail
Translator: Don Leslie - Email:

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