New Diesel Injector Valve F00RJ01819 for Fuel Injector 0445120092 0445120157 0445120279 0445120282 for Injection Needle

The failure and premature failure of the injector needle valve assembly during use are related to many factors such as design, processing, fuel filtration quality, heat and cold treatment, and service conditions.
(1) Wear of pins and nozzle holes. Due to the high-speed injection of fuel and the continuous cutting of the mating surface by the abrasives in the fuel, the pin and the injection hole wear the pin, the diameter of the injection hole expands, and the surface is covered with longitudinal grooves. After wear and tear, the fuel combustion is incomplete, the engine emits black smoke, and carbon deposits are formed around the combustion chamber and the piston top cylinder wall, causing the engine to overheat.
(2) Wear of the needle valve and the sealing cone of the needle valve body. The sealing cone surface of the needle valve and the needle valve body, due to the periodic opening and closing impact and phase friction, produces extrusion plastic deformation and fatigue cracks, and is ground into grooves, so that the sealing performance is damaged, and the injection cutting is not crisp. And produce a drip. This will cause the engine to work unevenly, and the exhaust will have black smoke. When the damage is severe, the high-temperature exhaust gas may enter the oil tank of the injector through the sealing cone surface and burn the needle valve to death.
(3) Wear of the guide surface. The guide surface of the needle valve and the guide hole of the needle valve body are abraded by abrasives, which increases the radial gap. It not only affects the centering of the sealing cone surface, but also damages the sealing performance of the needle valve and the valve body sealing cone surface, increases the oil return, reduces the oil supply, and deteriorates the atomization quality. The fuel injection start time lags behind, causing difficulty in starting and power drop. In addition, due to the increased gap, the inclusions in the fuel enter the guide surface, causing the needle valve to be stuck or seized by carbon deposits.