Product Descreiption
| arameter | Specification |
|---|---|
| OEM Part Number | 3964142 |
| Compatible Engine Models | Cummins ISLe, QSL9, ISC, QSC, ISL, QSL series diesel engines |
| Core Material | High-strength, corrosion-resistant carbon steel |
| Net Weight | Approximately 0.15kg |
| Operating Pressure Rating | Engineered for 1600-2400 PSI high-pressure common rail diesel fuel system operation |
| Design Standard | Fully meets Cummins OEM dimensional, flow and performance specifications |
| Compliance Certification | ISO9001, TS16949 certified |
| Key Design Feature | Precision bent, leak-free, high-flow internal bore structure with vibration resistance |
2. Installation Location
This high-pressure oil pipe is installed in the high-pressure fuel delivery circuit of Cummins ISLe/QSL9 series diesel engines, with the specific installation position as follows:
- It serves as the dedicated high-pressure fuel supply channel for a single engine injector, connecting the high-pressure fuel rail (fuel manifold) directly to the corresponding fuel injector on the engine
- It is mounted on the side of the engine cylinder head, adjacent to the injector and fuel rail assembly. Its custom bent shape is precisely matched to the engine’s spatial layout to avoid physical interference with other engine components
- It is secured by threaded fasteners at both inlet and outlet ends, with a standard installation torque of 23 N·m (204 in-lb) for the end connections. It is also fitted with a dedicated retaining clamp to fix its position and prevent vibration-induced loosening, abrasion or damage during engine operation
3. Core Functions
- Precision High-Pressure Fuel Delivery As a critical core component of the engine’s high-pressure common rail fuel system, it delivers stable, high-pressure diesel fuel directly from the fuel rail to the fuel injector, ensuring a continuous, accurate and consistent fuel supply for the engine’s combustion cycle.
- Engine Performance Optimization Its precision high-flow internal design minimizes fuel pressure loss and flow restriction during delivery, which effectively enhances the engine’s throttle response, improves power output stability, and optimizes fuel combustion efficiency to reduce fuel consumption.
- Fuel System Reliability Guarantee Manufactured from high-strength corrosion-resistant materials, it can withstand the extreme operating conditions of diesel engines, including continuous high temperature, high pressure and strong vibration. It effectively prevents fuel leaks, avoids system pressure drop, and ensures long-term stable operation of the entire fuel injection system.
- Emission Control Support By ensuring accurate and consistent fuel delivery to the injector, it cooperates with the engine’s electronic control unit to achieve precise fuel injection control, which helps the engine meet strict exhaust emission standards and reduce the emission of harmful pollutants such as nitrogen oxides and particulate matter.
