Heating devices used in diesel engines to preheat the air in the combustion chamber, making it easier to ignite the fuel in cold conditions.

• Advantages: facilitate easier starting of diesel engines in cold weather, ensure quick startup while reducing wear and tear, improve combustion efficiency and reduce emissions during startup, and enhance overall engine performance and longevity.

• Applications: Used primarily in diesel-powered vehicles such as cars, trucks, and buses, as well as in industrial and marine diesel engines to ensure reliable starting in low temperatures.