Piston cooling nozzle action
Prevent piston overheating, lubricating oil spray
Main function of piston cooling nozzle 1
The main function of the piston cooling nozzle is to prevent the piston from overheating. On the inside of the piston, it will engine oil spray, so as to effectively reduce the temperature of the piston, prevent overheating. If the piston cooling nozzle is faulty, it will lead to poor piston cooling, which will cause problems such as excessive expansion of the piston, lubricating oil carbonization, sliding surface adhesion and burning.
Working principle and application scenario of piston cooling nozzle
The piston cooling nozzle takes advantage of the cooling effect of the engine oil to reduce the temperature of the piston by atomizing and spraying the engine oil inside the piston. This design ensures that the piston can maintain normal operation under high temperature and high load working conditions, thus extending the service life of the engine. Piston cooling nozzles are widely used in automobile engines and are important components to ensure the normal operation of engines.
Overview of the working principle of the piston cooling nozzle
The working principle of the piston cooling nozzle is mainly concerned with the supply and regulation of oil. When the engine is working, oil pump sends the oil pump to the nozzle, and makes the oil spray to the piston surface in the form of mist through the pressure regulating mechanism inside the nozzle. This spray ensures that the oil is evenly covered on the surface of the piston, forming an effective protective film. At the same time, the fluidity and heat transfer performance of the oil can enhance the heat transfer effect and improve the cooling efficiency.
Specific working mechanism under different engine types
cold car status :
In cold condition, the engine computer board control solenoid valve is energized, and the solenoid valve opens the oil passage to the pressure chamber. The oil enters the pressure chamber and, under the action of the oil pressure and the spring pressure, pushes the plunger to the left, blocking the oil passage to the piston cooling nozzle. At this time, there is no oil pressure in the oil channel of the piston cooling nozzle, and the piston will not be cooled.
Hot car status :
In the hot car condition, the solenoid valve is powered off, blocking the oil passage to the pressure chamber. The oil can only enter the piston cooling nozzle, because the oil pressure is greater than the spring pressure, push the plunger to the right, opening the oil channel to the piston cooling nozzle. At this time, the oil channel of the piston cooling nozzle is filled with oil, and the piston is cooled.
Volvo diesel :
The piston cooling nozzles of Volvo diesel engines reduce the piston temperature by spraying cooling oil. The oil pump sends the oil pump to the nozzle, and through the pressure adjustment mechanism inside the nozzle, the oil is sprayed to the piston surface in the form of mist, to ensure that the oil is evenly covered, forming a protective film, and improving the cooling efficiency.
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