Compression and the fuel system are the most important factors for the efficient operation of the diesel engine.
The preheating system heats the compression air necessary for cold engine starting.
The preheating system is particular to the diesel engine.
The preheating system heats the air electrically for cold engine starting.
There are two types: The glow plug type, which heats the air inside the combustion chamber, and the intake heater type, which directly heats the air coming from the air cleaner.