Mechanics

Ignition System

Step by step guide on how an automotive engine ignition system works. This article pertains to all internal combustion engines.

Step 1 - Every internal combustion engine must utilize an ignition system which is used to ignite the fuel air mixture inside the combustion chamber.


Engine Ignition System Action Cut-Away

Step 2 - An ignition system starts by referencing the crankshaft while in motion, this rotation produces electrical impulses which are sent to the car's computer for translation.


Crankshaft Angle Sensor

Step 3 - A sensor is used at the rear of the crankshaft also to measure crankshaft flex while making further adjustments.


Rear Crankshaft Positioning Wheel

Step 4 - Camshaft angle sensors are used to give feedback data to the computer to also help with ignition timing.


Camshaft Angle Sensors

Step 5 - This feedback data is transferred the computer via the wiring harness.


Wiring Harness

AUTHOR


Written by
Co-Founder and CEO of 2CarPros.com
35 years in the automotive repair field, ASE Master Technician, Advanced Electrical and Mechanical Theory.


COMMENTS TO THIS ARTICLE


Please use our question form if you have a specific question about your car as we are not able to give you a full answer on this page.



Article first published (Updated 2013-12-04)