There are several kinds of diesel car preheaters

Pacific Automotive Network diesel car preheater has flame jet preheater, electric wire preheater two kinds. Heating device is not on the tank of diesel fuel all heated, only a small part of the diesel fuel in the oil circuit into the combustion chamber combustion, most of the return pipe from the return flow back to the tank, back to the tank of oil is hot oil, directly to the inlet and then reuse, the diesel engine works its own temperature continues to rise until the use of the environment with the use of thermal equilibrium, the return of the oil is further heated.

The main motor of the preheater drives the plunger oil pump, combustion fan and atomizer to rotate. Oil pump will inhale the fuel through the oil pipeline to the atomizer, the atomizer through the role of centrifugal force will be atomized fuel and combustion fan inhalation of air in the main combustion chamber mixed by the hot electric plug ignition, in the combustion chamber after the combustion chamber after the full combustion of the folding back, through the inner wall of the water jacket and the top of the radiator, will be the heat to the water jacket jacket jacket in the medium (coolant). After heating the medium in the circulating water pump (or heat convection) under the action of the whole piping system to circulate, in order to achieve the purpose of heating. The exhaust gas of the heater combustion is discharged from the exhaust pipe.

Flame jet preheater uses the heat of fuel combustion to heat the incoming air, while the electric preheater uses a resistance wire to heat the incoming air. Flame jet preheater are installed in the intake pipe; electric heater type preheater installation location, small direct injection diesel engine installed in the combustion chamber (or swirl chamber), high-power direct injection diesel engine is generally installed in the intake pipe. Flame injection type preheater has a larger coefficient of linear expansion of the tubular valve body, the tube has a cavity, the top of the oil pipe connector, through the oil pipeline and the special small fuel tank connected, the lower part of the threads by the spool with the spool cemented together, the top of the spool will be closed to the small oil holes. On the outside of the valve body, there is a nickel electric wire wound, one end of the wire is connected with the shell and the iron, the other end is connected with the terminal. When the preheater is not in operation, the tapered tip of the spool closes the small oil hole under the action of the cold contraction of the valve body. (Photo/text/photo: Pacific Auto Chen Miaoling)