4918081
Injector Fuel Supply Tube
Cummins®

The Fuel Injector Supply Tube, identified by part number 4918081, is a component manufactured by Cummins, a leading provider of diesel engines and related technologies. This tube is integral to the fuel system of heavy-duty trucks, facilitating the efficient delivery of fuel to the injectors. Cummins, known for its robust and reliable engine solutions, ensures that this component meets the demanding requirements of commercial trucking applications ¹.

Function and Operation

The Fuel Injector Supply Tube operates within the fuel system by delivering pressurized fuel from the fuel rail to the individual injectors. It plays a role in maintaining consistent fuel pressure, which is vital for the precise operation of the injectors. This consistent pressure ensures that fuel is delivered in the correct quantity and at the right time, contributing to the overall efficiency and performance of the engine ².

Key Features

The design and construction of the Fuel Injector Supply Tube are tailored to withstand the harsh conditions present in heavy-duty truck applications. It is typically made from high-quality materials that offer resistance to corrosion and wear. The tube features secure connection points, often utilizing O-rings or similar seals, to ensure a leak-free interface with the fuel rail and injectors. These connections are designed to maintain integrity under high pressure and temperature fluctuations ³.

Benefits

The Fuel Injector Supply Tube provides several advantages within the fuel system. By ensuring a consistent and reliable fuel supply to the injectors, it contributes to improved engine performance. This consistent fuel delivery can lead to more efficient combustion, potentially enhancing fuel economy. Additionally, proper fuel system function can aid in reducing emissions, aligning with environmental regulations and standards.

Installation and Compatibility

Proper installation of the Fuel Injector Supply Tube is crucial for its effective operation. It should be installed according to the manufacturer’s guidelines to ensure secure connections and proper system pressure. Compatibility with specific engine models and fuel systems should be verified to ensure optimal performance and longevity of the component.

Maintenance and Troubleshooting

Routine maintenance of the Fuel Injector Supply Tube involves inspecting for signs of wear, leaks, or corrosion. Regular checks can help identify potential issues before they lead to more significant problems. Common issues may include fuel leaks or inconsistent fuel pressure, which can often be traced back to connection points or the tube itself. Troubleshooting steps may involve tightening connections, replacing seals, or, in some cases, replacing the tube if damage is detected.

Safety Considerations

When working with the Fuel Injector Supply Tube, it is important to follow safety precautions to protect both the technician and the equipment. This includes ensuring that the fuel system is depressurized before beginning any work to prevent fuel spray, which can be hazardous. Additionally, proper handling of fuel system components is necessary to avoid contamination and ensure the integrity of the system.

Cummins Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a history spanning over a century, Cummins has established a reputation for innovation, quality, and reliability in the commercial truck industry. The company’s extensive product portfolio includes a wide range of diesel and natural gas engines, as well as related technologies that enhance performance, efficiency, and sustainability.

Cummins Fuel Injector Supply Tube 4918081 Compatibility

The Cummins Fuel Injector Supply Tube part number 4918081 is designed to fit seamlessly with several models of Cummins engines. This part is crucial for maintaining the integrity of the fuel delivery system, ensuring that fuel is efficiently and accurately supplied to the injectors.

QSK19 CM2350 Engines

The part 4918081 is compatible with the QSK19 CM2350 K105 and QSK19 CM2350 K114 engines. These engines are known for their robust performance and reliability, making them suitable for a variety of demanding applications. The supply tube ensures that the fuel injectors receive the correct amount of fuel, which is essential for maintaining optimal engine performance and efficiency.

QSK19 CM850 MCRS Engine

The Cummins Fuel Injector Supply Tube part number 4918081 also fits the QSK19 CM850 MCRS engine. This engine is designed for high-performance applications, requiring precise fuel delivery to meet its power demands. The supply tube plays a critical role in this process, ensuring that the fuel injectors are supplied with the correct fuel pressure and flow, which is vital for the engine’s overall performance and longevity.

By ensuring that the fuel injector supply tube is correctly installed and maintained, engine operators can help to prolong the life of their engines and ensure that they continue to perform at their best.

Role of Part 4918081 Fuel Injector Supply Tube in Engine Systems

The Part 4918081 Fuel Injector Supply Tube is an integral component in the fuel delivery system of an engine, ensuring efficient and precise fuel distribution to the injectors. This component interfaces with several key engine systems to optimize performance and reliability.

Interaction with Fuel Supply Plumbing

The Fuel Injector Supply Tube connects directly to the fuel supply plumbing, which includes the fuel rail and associated lines. This connection facilitates the transfer of pressurized fuel from the fuel pump to the individual fuel injectors. The tube’s design ensures a secure and leak-free passage, maintaining consistent fuel pressure throughout the system.

Coordination with Fuel Injectors

Each fuel injector is supplied with fuel through the Fuel Injector Supply Tube. The tube’s precise engineering allows for uniform fuel distribution, which is essential for balanced combustion across all cylinders. This consistent fuel supply enhances engine performance and fuel efficiency.

Influence on Camshaft and Valve Timing

Efficient fuel delivery is closely tied to the engine’s camshaft and valve timing. The Fuel Injector Supply Tube ensures that fuel is available at the precise moment the injectors open, synchronized with the camshaft’s rotation. This timing is vital for optimal air-fuel mixture, leading to smoother engine operation and reduced emissions.

Impact on Connecting Rod and Piston Assembly

The performance of the connecting rod and piston assembly is directly affected by the quality of fuel delivery. The Fuel Injector Supply Tube plays a role in providing a steady fuel flow, which contributes to consistent combustion pressures. This consistency is crucial for the durability and efficiency of the connecting rod and piston, as it reduces the likelihood of irregular combustion events that can cause mechanical stress.

Enhancement of Performance Parts

In engines equipped with performance parts, such as high-flow fuel injectors or upgraded fuel pumps, the Fuel Injector Supply Tube must be capable of handling increased fuel volumes and pressures. The tube’s robust construction and precise fitment ensure that it can support these enhancements without compromising fuel delivery integrity. This compatibility is essential for maximizing the benefits of performance upgrades.

Conclusion

The Fuel Injector Supply Tube, part number 4918081, is a critical component in the fuel delivery system of Cummins engines. Its role in maintaining consistent fuel pressure and efficient fuel distribution is essential for optimal engine performance, fuel efficiency, and emissions reduction. Proper installation, maintenance, and compatibility with specific engine models are key to ensuring the longevity and reliability of this Cummins part.