<Product Description> This high-pressure electronically controlled common rail fuel injection valve body assembly (part number: 20544186; common OE cross-reference and interchangeable identification numbers include 21340611, 20708600, 85003963, 21947757, etc., mainly matched with D11 and D13 series 10.8L/12.8L large-displacement inline six-cylinder heavy-duty diesel power platforms, widely installed in highway heavy-duty trucks, semi-trailer tractors, heavy engineering dump trucks, and large special transport equipment) is meticulously manufactured. As the micro-metering and ultra-fine spray execution unit in the entire fuel supply system, it is responsible for accurately metering high-pressure diesel fuel and rapidly dispersing it into ultra-fine atomized particles under microsecond-level electrical signal commands, promoting full mixing and combustion of fuel and intake airflow.
The product adheres to the precision standards of "microscopic ultra-fine atomization and millisecond-fast response." Internal needle valve components and control valve cores are made from carefully selected aerospace-grade quenched special alloy steel, combined with ultra-high precision geometric grinding and low-friction polishing. The surface is coated with a high-density, ultra-wear-resistant DLC hardened coating, effectively preventing early erosion and jamming caused by diesel impurities. After the parts are installed, drivers and mechanics will experience a very clear and intuitive improvement: crisp and rapid cold starts in the morning, and the severe vibration at low-speed idling has subsided and become smooth; under heavy-load overtaking, steep incline, or long-term high-speed cruising conditions, the accelerator pedal response is firm and sensitive, acceleration is smooth and the power is continuous, while exhaust smoke is significantly improved, resulting in satisfactory fuel consumption control and a smooth driving experience.
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