The SKYACTIV-D 2.2 diesel engine has a relatively low compression temperature due to low compression. The preheating system increases the compression temperature by heating the air intake into the cylinders with glow plugs, which improves engine starting at low ambient temperatures.
Ceramic glow plugs have a high heating rate, which allows the intake air temperature to be increased quickly.
The glow plugs are controlled by the pre-heating control unit, which is located in the engine compartment.