Diesel engines do not have ignition coils, as they use a different method to ignite the fuel mixture. Diesel engines rely on compression ignition, where the fuel is injected directly into the highly compressed air in the cylinder. The heat generated by the compression causes the fuel to ignite, eliminating the need for an ignition coil.
In contrast, gasoline engines use spark ignition, where an ignition coil generates a high-voltage electrical spark to ignite the fuel-air mixture. This is necessary because gasoline has a lower compression ratio and requires an external ignition source to initiate combustion.
