Description
Product Overview
The nozzle components are assembled at the front end of the mechanical fuel injector. The needle valve rises and closes under the thrust of high-pressure fuel, and the high-pressure fuel is torn apart through the tiny holes in the nozzle to form fine oil mist, which is then injected into the cylinder to complete combustion and work. Under long-term high-pressure fuel erosion, wear from impurities in diesel particles, and high-temperature radiation conditions in the combustion chamber, the nozzle holes expand, and the sealing surface of the needle valve develops scratches. This can lead to poor atomization, fuel leakage, incomplete combustion, and problems such as insufficient power, black smoke from exhaust, and repeated ignition failures at low temperatures. This product has a unified standard for outer diameter size, needle valve stroke, and nozzle hole diameter. After disassembling the fuel injector, the nozzle housing and needle valve can be replaced as a set to repair the failure of fuel injection. It is suitable for maintenance of direct injection diesel engines for agricultural machinery, light trucks, heavy trucks, small and medium-sized construction machinery, and other machinery.
Core advantages of this product
Integrated processing of quenched and tempered alloy steel with high hardness for erosion and wear resistance
The nozzle housing and needle valve are all made of high-temperature quenched and hardened alloy steel, with surface wear-resistant strengthening treatment. They can withstand long-term high-pressure fuel and impurity particle erosion without developing scratches or deformation of the hole diameter, maintaining standard atomization effect for a long time.
One-to-one mirror surface matching grinding, with micro-gap sealing to prevent fuel leakage
The needle valve and the inner cavity of the nozzle are precisely matched for mirror surface grinding. In the closed state, they completely seal and lock the fuel, preventing fuel leakage after engine shutdown, reducing carbon deposits and black smoke emissions in the cylinder.
Tapered segmented nozzle housing, precisely positioning to fit the fuel injector housing
The housing adopts a multi-stage tapered limit structure. During assembly, it precisely fits into the inner cavity of the fuel injector without radial shaking or offset, ensuring the coaxiality of the needle valve's reciprocating motion and avoiding single-sided wear that causes sealing failure.
Extended integrated smooth needle valve, smooth and free from sticking during reciprocation
The extended segmented needle valve is mirror-polished throughout, with no burrs on the surface. During the reciprocating motion under high-pressure fuel push, it has low resistance and responds quickly to the push, eliminating injection lag and power jolts.
External wall engraved with specification codes, quick identification of models during storage and assembly
The nozzle housing is engraved with a unique model code on the outside. It is resistant to diesel soaking and wiping without the characters falling off. During maintenance and storage, it can quickly match the model, eliminating the possibility of incorrect installation causing abnormal atomization faults.
Complete factory calibration of atomization flow rate, no need for manual grinding and adjustment during assembly
Each set of components is independently tested for fuel injection volume, uniformity of atomization particles, and high-pressure holding performance. The factory parameters are unified, and direct replacement can restore the standard fuel injection performance, eliminating the need for manual grinding and adjustment procedures.
Accessory list
DLLA156PN110 Complete set of nozzle components (1 segmented nozzle housing + 1 extended precision needle valve) Vacuum-sealed packaging Applicable scenarios
It is suitable for agricultural tractors with mechanical direct injection fuel supply system, light-duty freight trucks, long-distance heavy-duty trucks, small wheeled excavators, fixed diesel generators, and is applicable for high-intensity farming in fields, long-distance transportation in urban and rural areas, high-temperature dust on construction sites, and corrosion of impure diesel in various mechanical direct injection diesel engine fuel injectors. The front atomization nozzle components of the fuel injectors are replaced in such environments.
Product Basic Parameters
Product Name: DLLA156PN110 Fuel Injector Needle Valve Atomization Component
Part Number: DLLA156PN110
Main Material: Tempered and hardened alloy steel
Structural Feature: Multi-stage stepped nozzle housing, extended mirror-ground needle valve, outer wall engraved model code, micro-hole atomization nozzle end face
Application Conditions: High-pressure fuel atomization injection, combustion chamber high-temperature radiation, alternating cold and hot vibrations in engine compartment, corrosion of impure diesel in various mechanical direct injection diesel engine fuel injectors
Product Status: New complete set of fuel injector components, factory completed with full calibration and testing for atomization accuracy, high-pressure sealing, and flow matching Packaging: Each package is vacuum-sealed in a plastic bag, which isolates dust and oil. It is protected by a hard tube to provide cushioning and protection, preventing the mirror surface and sealing working surface from being scratched during transportation. It supports single-set retail and bulk purchase of entire bags, and is suitable for cross-border small package logistics.
