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<p style="user-select: auto;"><br></p><p style="user-select: auto;">The role of the diesel engine piston cooling <a href="https://www.df-fuelinjector.com/automobile-fuel-injectors" target="_blank">car fuel injectors</a> is to force the piston to cool, lubricate the friction pair between the piston, piston ring, and cylinder liner, strengthen the cylinder seal, and clean the combustion and carbon collection. The engine piston cooling car fuel injectors is usually installed on the lubricating oil passage of the engine main shaft. In order to maintain the lubricating pressure of the main oil passage, the mechanism of the engine piston cooling car fuel injectors is a single-item ball valve type and a direct damping hole type. According to the mechanism of the piston cooling car fuel injectors, we should pay special attention to the opening pressure and damping pressure of the ball valve of the piston cooling car fuel injectors during maintenance (about 1.5 kg, not less than 0.5 kg). When the pressure of the piston cooling car fuel injectors is insufficient, the piston will not be cooled in time. As the temperature of the engine increases, the piston expands due to heat, making the space in the top clearance of the piston smaller, and it will collide with the valve. The gap between the piston and the cylinder liner will become smaller, and the friction will increase, resulting in accidents of pulling and sticking the cylinder. Therefore, it is very important to ensure that the oil injection holes of the piston cooling car fuel injectors are unobstructed and have a certain sealing performance and good injection ability. During the normal use of the engine, the piston cooling car fuel injectors will not normally have the above failures within a "three guarantees" cycle, but after the engine overhaul cycle, the piston cooling car fuel injectors must be replaced to ensure that the engine can work normally. It is especially worth noting that during the maintenance process, maintenance personnel often take the blockage of the connecting oil passage and use an air pump to check whether the piston cooling car fuel injectors is smooth, and ignore the detection of the injection pressure of the piston cooling car fuel injectors. The above are the problems we encountered in actual equipment maintenance. Engines with similar failures include Deutz F6L912 air-cooled diesel engines and Cummins NT855 water-cooled diesel engines. Attention should be paid during maintenance.</p>
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