The engine in a vehicle needs three things to run: air-fuel mixture, sufficient compression, and an ignition source (heat or spark). The air-fuel mixture is ignited by an electric spark in gas engines. Diesel engines use heat from compression to ignite the air-fuel mixture. This course focuses on gasoline engines. The ignition system on vehicles has changed over the years, but its purpose has been the same – to ignite the air-fuel mixture. The ignition system converts fuel’s chemical energy into mechanical energy (wanted motion) and thermal energy (wasted heat). Ignition system advancements have been influenced by progressively stringent emission standards. This course will help you define the purpose of the ignition system, identify ignition system generations, differentiate between interference and non-interference engines, and test and perform basic service procedures on the ignition system.
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