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Distributorless Ignition Systems

 




Investigation – Investigating Distributorless Ignition Systems

DIS system coil pack

Distributorless ignition systems (DIS) are used to ensure the air and fuel mixture in an engine is ignited at exactly the right time for efficient combustion to occur.

They comprise mechanical and electrical components that, together, provide appropriate timing of the spark at each spark plug.

Use the information in the related presentation to identify the components and voltage waveforms of DIS.






Distributorless Ignition Systems

Early distributorless ignition system

a) Identify the components of this distributorless ignition system.












A - ECU


B - Crankshaft position sensor


C - Ignition control module


D - Coil pack


E - Spark plug wires


F - Spark plugs



b) Draw a diagram to show the relationship between the primary voltage waveform and the secondary voltage waveform for one ignition coil. Ensure the diagram shows the waveforms for 2 spark plugs.



A typical early DIS system will comprise which of these components? Select all the correct answers.

Early DIS components






What is the approximate voltage of the compression spark in the DIS secondary circuit?


What is the input to the ignition module that signals when a spark is required?

Early DIS system




“On modern vehicles the functions of the ICM are integrated into the ECU.”

Is this statement true or false?



Technician A says a magnetic field builds up when current flows through the secondary winding of an ignition coil. Technician B says a spark occurs when the magnetic field of an ignition coil collapses.

Who is correct?

DIS coil packs































































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Location: Dhaka, Bangladesh

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