In order to keep the pressure in the crankcase ventilation pipe consistent with the pressure outside the engine, the function of the heater can effectively prevent icing and better adapt to the climate in the cold region of northern China.

The core of the heater principle is energy conversion, and the most extensive is the conversion of electric energy into heat energy. Electric heaters, for example, use eddy currents generated by metals in alternating magnetic fields to heat and absorb themselves, and convert electric energy into light energy; For example, solar water heaters absorb solar radiation heat energy and convert solar energy (photoelectric effect) into heat energy; Bioenergy is a kind of energy that stores solar energy in the form of chemical energy, which directly or indirectly comes from photosynthesis of plants. In addition, there are nuclear energy, wind energy and other energy conversion methods, but generally need to be converted into electrical energy.