Description
Product Overview
The mechanical fuel injector relies on a high-pressure oil pump to deliver high-pressure fuel. The internal pressure-regulating spring and needle valve pair work together to control the opening and closing of the injector, tearing the high-pressure fuel into fine oil mist and spraying it into the cylinder to complete combustion and power generation. Under long-term heavy-duty mining operations, long-distance bumpy driving, and continuous erosion by impure diesel, the internal needle valve sealing surface will wear, the spring elasticity will decline, and the front nozzle will be abraded and fail. This will result in fuel leakage, coarse fuel atomization particles, and continuous power output degradation. This product has standardized processing for the total length, valve body installation outer diameter, and opening pressure parameters. During maintenance, the entire fuel injector can be directly replaced, eliminating the cumbersome process of disassembling and grinding the internal components. It is suitable for large-scale mining excavators, heavy-duty loaders, heavy-duty freight trucks, and large-power stationary diesel generators for maintenance.
Core Advantages of the Single Product
Integrated chrome-plated alloy steel valve body, resistant to rust and pressure, and not prone to deformation or rusting
The valve body is formed by a single piece of alloy steel through integral turning. The surface is coated with a mirror chrome anti-rust and wear-resistant layer, which can withstand the impact of high-pressure fuel and the alternating cold and hot vibrations of the engine compartment. The valve body is less prone to rusting and cracking, and the threads are less likely to slip. It maintains the internal high-pressure sealing pressure for a long time.
Extended integrated guide rod, smooth oil flow and reduced vortex loss
The matching extended hard guide rod provides an internal straight-through smooth oil passage, reducing the resistance of high-pressure fuel flow and preventing impurities from accumulating and blocking the oil passage. This ensures continuous and stable fuel supply under heavy-duty conditions.
Red and yellow dual-color dust-proof protective caps at both ends, providing full protection for the precise spray holes and interfaces
The factory pre-installs a yellow tail protective cap and a red front nozzle protection cap, completely covering the precise interfaces and atomization spray holes. This isolates dust, transportation impacts, and scratches on the micro-pores, preventing impurities from entering the valve body and causing needle valve jamming and failure.
Side positioning locking screws, ensuring stable and no-offset assembly
The valve body side is equipped with locking positioning screws. After assembly, it limits and fixes the fuel injector body, preventing radial rotation and offset during vehicle vibration and equipment vibration, and eliminating the problem of air leakage and oil seepage in the assembly gap.
Built-in paired grinding needle valve components, uniform and sufficient atomization to reduce carbon deposits
The valve body is pre-installed with a one-to-one mirror-matched grinding needle valve assembly. The spray oil mist particles are fine and uniform, and the oil and gas mixture is sufficient, reducing carbon deposits in the cylinder and lowering exhaust black smoke emissions and fuel consumption.
Whole-machine factory pressure calibration for all working conditions, no need for secondary adjustment during installation
The entire fuel injector is independently tested for the opening spray pressure, uniformity of fuel atomization, and high-pressure holding performance. The factory parameters are unified, and after assembly, the engine runs smoothly at idle speed, and the acceleration power is linear, significantly reducing maintenance and debugging time. List of Accessories
4W-7018 Complete Mechanical Injector Assembly 1 piece
The tail end is pre-installed with a yellow plastic dust-proof protective cap
The front end is pre-installed with a red nozzle dust-proof protective cap
The side is pre-installed with a positioning locking screw Applicable scenarios
It is suitable for large mining excavators with mechanical direct injection fuel supply system, heavy-duty wheeled loaders, long-distance heavy-duty freight trucks, high-power fixed diesel generator sets. It is applicable for 24-hour continuous heavy-duty operations in mines, long-distance trunk transportation, hot and dusty environments at construction sites, and corrosion of impure diesel on heavy machinery with direct injection diesel engines. The fuel injection complete machine for the core of the diesel engine can be replaced in such harsh environments.
Product Basic Parameters
Product Name: 4W-7018 Mechanical Direct Injection Injector Assembly
Part Number: 4W-7018
Main Material: Chrome-plated alloy steel valve body, extended hard guide rod, hardened alloy steel needle valve pair, alloy pressure regulating spring, plastic dual-color dust-proof protective cap
Structural Feature: Integrated chrome-plated valve body, extended straight-through guide rod, red and yellow dust-proof protection caps at both ends, side positioning locking screws, built-in precision atomization needle valve component
Application Conditions: High-pressure fuel quantitative atomization injection, combustion chamber high-temperature heat insulation sealing, alternating cold and hot vibrations of the engine compartment, corrosion of impure diesel on various heavy machinery direct injection diesel engines
Product Status: New and complete injector assembly, factory completed with opening pressure, atomization accuracy, and high-pressure sealingity full bench calibration and testing
Packaging: Independent thickened shock-proof hard tube packaging, complete protective caps at both ends covering the precise working surface, foam buffer protection to avoid transportation impact damage to internal precision components, supports single-piece retail, bulk purchase in boxes, and is compatible with cross-border small package logistics.
