Glow plug is an important part of automobile ignition system, glow plug, commonly known as glow plug. It is a supplementary heater, which is used as supplementary equipment during the start-up of the diesel engine. When the diesel engine is started, because of the low temperature outside, it is difficult to start the engine cycle due to the process of air intake, compression, explosive glow plug, and exhaust cycle. At this time, supplementary heating is required. This device is installed in the preheating chamber above the engine cylinder, below the fuel injector. When the diesel is sprayed and atomized, it will pass through the glow plug and be heated. When the oil and gas are compressed, it is easy to explode, and the cycle of the glow plug is started to achieve normal engine cycle work. According to the heating time of the glow plug, it can be divided into slow and fast glow plugs.
According to materials, it can be divided into metal glow plugs and ceramic glow plugs. The main motor of the heater drives the plunger oil pump, the combustion fan and the atomizer to rotate. The fuel pump sends the inhaled fuel to the atomizer through the fuel pipeline. The atomizer atomizes the fuel through centrifugal force and mixes it with the air sucked in by the combustion fan in the main combustion chamber. It is ignited by the hot glow plug and is fully in the after-combustion chamber. After burning, it turns back and transfers the heat to the coolant in the interlayer of the water jacket through the inner wall of the water jacket and the radiating fins above it. After heating, the medium circulates in the entire pipeline system under the action of a circulating water pump (or thermal convection) to achieve the purpose of heating glow plugs. The exhaust gas burned by the heater is discharged from the exhaust pipe.
