Description
Product Overview
The single injector relies on the cam-driven spring to achieve high-pressure fuel injection. The electronic control component precisely controls the opening and closing of the injector, and is suitable for large-displacement heavy-duty diesel engines. Under long-term mining site conditions of 24-hour full-load operation, ultra-high oil pressure reciprocating impact, and poor-quality impure diesel erosion, the internal needle valve sealing surface will wear, the sealing ring will age, and the electromagnetic drive valve core will get stuck. This will result in single-cylinder fuel supply imbalance, significant reduction in the overall engine power, fuel leakage into the engine oil to dilute the lubricating medium, excessive black smoke emissions, and fault alarms. This product has its overall size, spring elasticity, and electromagnetic drive parameters uniformly calibrated. Maintenance can be directly carried out by replacing the entire set, without the need for on-site grinding and adjustment. It is suitable for large-scale mining excavators, heavy-duty loaders, and large-power fixed diesel generator sets for maintenance.
Core advantages of the single product
Segmented stepped mirror alloy steel body, resistant to pressure, wear, and deformation
Multi-stage stepped hardened alloy steel fuel injection housing, with mirror surface ultra-precision grinding on the inner and outer walls, able to withstand continuous high-pressure fuel impact in the mining site heavy-load vibration environment, and will not deform or crack, eliminating the internal reflux and pressure relief of high-pressure fuel.
Thicker and thicker high-pressure reset spring, uniform and stable injection stroke
Thicker and thicker high-temperature-resistant alloy spring, with uniformly calibrated elasticity, each time the fuel injection rebounds with consistent force, the difference in fuel injection volume among cylinders is small, the engine runs smoothly, and reduces vibration and black smoke emissions.
Side-mounted integrated electromagnetic drive component, sensitive and without delay in opening and closing
The side integrates a sealed electromagnetic drive module, with an internal insulated high-temperature coil, quickly opens the needle valve upon power-on, closes immediately upon power-off, without sticking or delay, precisely controlling the fuel injection timing, eliminating the inability to climb, intermittent cylinder shortage.
Multi-layer composite sealing positioning ring, double barrier against gas and fuel leakage
The rod body is arranged with multiple oil-resistant sealing rings in layers, precisely positioned and installed at the depth during assembly, blocking the upward rise of high-temperature gas in the combustion chamber and the outward leakage of high-pressure fuel, fundamentally avoiding the mixing of diesel into the engine oil.
Integrated precision atomizing nozzle, fully reducing loss under heavy load atomization
The top has a multi-level precise spray hole structure, with fine and uniform high-pressure fuel atomization particles, matching the large-displacement combustion chamber for complete combustion, significantly reducing carbon buildup in the cylinder, and reducing fuel consumption and black smoke emissions.
Factory complete pairing calibration, quick restoration of the overall machine power upon installation
Each injector is independently tested for fuel injection flow, opening pressure, and atomization effect at the factory, with uniform parameters. After replacement, there is no need to re-calibrate the equipment, significantly reducing maintenance and debugging time. Applicable scenarios
This product is suitable for large mining excavators with single-body injection system, heavy-duty wheeled loaders, and high-power fixed diesel generators. It is applicable for 24-hour continuous heavy-duty operations in mines, continuous high-temperature vibration of the engine cabin, and heavy-duty diesel engines operating in dusty and impure diesel environments. It is used for replacing the injection components of heavy-duty diesel engines.
Product Basic Parameters
Product Name: 3920217 Heavy-duty Single-Body Injector Assembly
Part Number: 3920217
Main Material: Tempered hardened alloy steel injector body, high-temperature resistant alloy reset spring, insulated sealing electromagnetic drive component, oil-resistant fluorine rubber sealing ring
Structural Feature: Segmented stepped mirror surface injector body, thickened high-pressure reset spring, side-mounted electromagnetic drive module, multi-layer sealed positioning ring
Application Conditions: Ultra-high pressure reciprocating injection, high-temperature continuous vibration of the engine cabin, heavy-duty diesel engines in mining dust and impure diesel environments
Product Status: New and complete injector assembly, factory completed with full calibration and testing of atomization accuracy, high-pressure sealingity, and electromagnetic opening and closing response
Packaging: Single independent shock-proof hard tube packaging, nozzle and electromagnetic drive terminals are equipped with dust protection plugs at both ends, foam buffer to isolate transportation impacts and scratches on the precise needle valve and conductive components, supports single-piece retail, bulk purchase in cases, and is compatible with cross-border small items and case logistics.
