Description
Product Overview
The fuel injector is assembled at the front end of the electronic fuel injector. The high-pressure fuel flows through the internal needle valve and is cut into uniform and fine oil mist by the front micro-hole. The electronic control unit precisely controls the injection timing and fuel quantity based on the rail pressure signal. Under the long-term working conditions of high cabin temperature and continuous impurities in diesel fuel, the injection holes may get clogged, the sealing surface of the needle valve may wear out, and the clearance between the mating parts may expand. This may result in poor atomization, engine shutdown with dripping oil, imbalance in power output of each cylinder, weak engine acceleration, excessive black smoke emissions, and a significant increase in fuel consumption. This product is an integrated precision fuel injector that has undergone high-pressure and high-voltage testing, as well as full-scale flow balance testing at all working conditions upon leaving the factory. The size and hole positions are standardized, and disassembly and assembly do not require grinding to fit. It is suitable for maintenance of medium and heavy-duty trucks, mining construction machinery, diesel generator sets with common rail fuel injectors.
Unique Core Advantages of the Single Product
Segmented stepped and lengthened mirror guide rod, no unilateral wear during reciprocating motion
The rod body adopts multi-segment arc smooth stepped transition, with the outer wall polished to a mirror finish. It guides stably within the fuel injector housing and does not have unilateral inclination wear. It maintains a micrometer-level sealing gap between the needle valve and the valve seat for a long time, preventing high-pressure fuel leakage and pressure loss, and stabilizing the common rail system oil pressure.
Front conical multi-micro-hole mirror spray hole, fine atomization and complete combustion
The conical guide end is combined with multiple groups of fine spray holes. The hole walls are mirror-polished without burrs. The high-pressure fuel is evenly divided into fine oil mist, and the gas and oil in the cylinder are fully mixed, significantly reducing carbon deposits in the cylinder and reducing tailpipe black smoke emissions, improving fuel utilization efficiency.
Central integrated widened limit flange, secure assembly and sealing
The middle section of the valve body is widened with limit steps. During assembly, it precisely fits the installation position of the fuel injector housing, and is combined with a sealing gasket for multiple layers of barrier against high-pressure fuel leakage, avoiding pressure loss and ensuring the stability of the injection pressure throughout the process.
The outer wall is permanently engraved with the part number, making it easy to verify inventory without misplacing parts.
The flange side is etched with the DLLA157P641 model code, resistant to diesel soaking, wiping wear, and facilitating maintenance, inventory matching, and clear visibility for cross-border small package / full-box logistics.
Product Basic Parameters
Product Name: Electronic Common Rail Fuel Injector Assembly
Part Number: DLLA157P641
Main Material: Overall Nitrogenized Quenched Alloy Steel
Structural Features: Segmented stepped and lengthened mirror guide rod, central widened limit flange, conical multi-micro-hole atomization end, outer wall engraved with part number
Applicable Working Conditions: 24-hour continuous full-load, cabin long-term high temperature, outdoor high-dust heavy-duty electronic common rail diesel engine fuel injector
Product Status: New precision fuel injector, completed with full calibration and testing for atomization effect, high-pressure sealing, and injection flow at the factory
Packaging: Each product is separately packaged in an independent transparent hard protective tube, with plastic plugs at both ends for protection against transportation impacts and scratches to the front micro-holes. It supports single-piece, multi-box, and bulk purchasing in cartons, and is suitable for cross-border small package / full-box logistics.
