High Quality Good Price T520 Control Valve Valve Assembly Injector Needle Injector Parts Engine Parts T520

As the core component of the fuel injection system, the reliability of the injector valve assembly is directly related to the engine's operating status, fuel economy and exhaust emission performance. Many factors are intertwined to influence its reliability, and any deviation in the smallest link may affect the whole body and the overall performance.

The quality of the material is the first and foremost factor in establishing the foundation of reliability. Valve components are often exposed to high temperature fuel, bear high-frequency opening and closing impact, if the manufacturing material high temperature, wear resistance, corrosion resistance is insufficient, will soon appear wear and tear, deformation. For example, the needle valve and valve seat if the material hardness is not good, frequent friction after the sealing surface is damaged, fuel injection sealing is destroyed, resulting in dripping phenomenon, not only a waste of fuel, but also lead to the mixture ratio imbalance, affecting the normal operation of the engine; solenoid part of the material if the conductivity of the magnetism is poor, the electromagnetic suction is unstable, the valve needle action response lags, destroying the precision of fuel injection.

The design process is the key link, which is related to the rationality of the internal structure of the components. A good design can optimize the fuel flow path and reduce the impact of fuel turbulence; a reasonable needle guiding structure can ensure the vertical movement of the needle and avoid bias wear. On the contrary, design defects are the source of hidden problems. If the layout of the injection holes is not appropriate, the atomization effect of the injected fuel is poor, and it cannot be evenly mixed with the air, resulting in insufficient combustion; the spring elasticity coefficient is designed incorrectly, either the elasticity is too weak, and the valve needle is not closed tightly, or the elasticity is too strong, and it affects the opening speed, which makes the timing of the injection disordered.

Working environment factors are like a harsh examiner, always testing the reliability of the valve assembly. Engine compartment high temperature, high humidity and severe vibration is the norm, high temperature is easy to trigger thermal expansion of materials, so that the precision fit gap changes, affecting the smoothness of mechanical action; high humidity environment, metal parts may rust and corrosion, erosion of key contact surfaces; continuous vibration impact, as if invisible external pull, intensifying the parts loosening, wear and tear, resulting in the connecting parts of the probability of fatigue fracture, so that the original solid valve component structure The structure of the originally solid valve assembly is on the verge of collapse.

Fuel quality should not be underestimated, the poor quality of fuel impurities, high water content, known as the valve assembly of the “chronic poison”. Tiny particles of impurities with the fuel flow through the narrow injection holes, the accumulation of the formation of blockage, reducing the amount of fuel injection; water mixed into the fuel, vaporization at high temperatures, interference with the fuel injection pressure, but also exacerbate the oxidation of parts rust corrosion, corrosion of internal circuits, destroying the insulation of the electromagnetic components, so that the injector malfunction frequently, the reliability of a big discount.

In addition, routine maintenance also has a profound impact. Neglect to replace the fuel filter, a steady stream of impurities invasion; not timely cleanup of carbon deposits, hindering the valve components normal heat dissipation, action, will lose its service life, weakening the reliability. As you can see, to ensure the reliable operation of the injector valve assembly, it is necessary to control the material, design, use of the environment, fuel quality and maintenance and many other factors.