High Quality Diesel injector 0 445 115 060 0445115060 Diesel Fuel Injector For VOLVO PENTA TD42A 860383 Spare Part

The function of each part of the injector

The processing precision of the parts inside the common rail injector is relatively high, and each part plays a vital role. There are also many parts that need to be adjusted during maintenance. Many maintenance personnel have not received formal training and do not know which parts need to be adjusted and where to adjust, resulting in a decrease in the service life of the fuel injector. During the production process of the fuel injector, in order to meet For the performance of the engine, many parts need to be adjusted by adjusting shims to meet the design requirements. These shims are not used casually, but are calculated through step-by-step fine measurement. The precision is calculated in microns. Such an accurate definition of each Adjusting the thickness of the shim, it can be seen that each adjusting shim has an important influence on the function of the fuel injector.
(1) Valve spring adjustment gasket. Adjust the spring force of the solenoid valve. When the spring force of the valve is adjusted, the fuel injection volume of the entire injection area will be affected, especially the fuel injection volume at the discharge point is the greatest.
(2) Iron lift adjustment gasket. The iron lift adjusts the position of the gasket structure and adjusts the maximum displacement of the ball up and down. If the armature lift exceeds the limit value, the injector will not inject fuel or the fuel injection volume will be seriously small. If the armature lift is at the set value Inside, adjusting the lift of the armature will change the amount of oil at the pre-injection point of the injector, and will not affect other injection points.
(3) Buffer lift adjustment gasket. Adjust the maximum displacement of the armature piece during the working process. The cushioning lift adjusting gasket should not be too thick, otherwise it will directly cause excessive oil return of the injector.
(4) Nipple spring adjustment washer. Adjust the spring force of the oil nozzle (the opening pressure of the needle valve of the oil nozzle), and the opening pressure of the needle valve of the oil nozzle is out of tolerance, which will lead to the deviation of the fuel injection quantity in the idling stage.
(5) Needle valve lift adjustment gasket. Adjust the maximum displacement of the nozzle needle valve during the working process. The size of the needle valve lift mainly affects the fuel injection quantity at the full load point.