3920222
Injector Fuel Supply Tube
Cummins®

The Injector Fuel Supply Tube (3920222) by Cummins is designed to facilitate the efficient delivery of fuel within the fuel system of heavy-duty trucks. This part ensures that the engine receives a consistent and precise amount of fuel, which is vital for optimal engine performance and efficiency ¹.

Basic Concepts

Injector fuel supply tubes are fundamental components within the fuel injection system of diesel engines. Their primary function is to transport fuel from the fuel tank to the injectors. These tubes operate under high pressure and must be constructed to withstand the demands of the fuel system. They interact closely with other components such as the fuel pump, fuel filter, and injectors to ensure a seamless flow of fuel ².

Purpose and Role

The Injector Fuel Supply Tube (3920222) plays a significant role in the operation of a truck’s engine by facilitating the delivery of fuel from the fuel tank to the injectors. This ensures that the engine receives the necessary fuel at the correct pressure and timing, which is crucial for combustion efficiency and overall engine performance. The tube’s design allows it to maintain fuel integrity and pressure, contributing to the engine’s reliability and efficiency ³.

Key Features

The Injector Fuel Supply Tube (3920222) is characterized by its robust design and the use of high-quality materials. It is engineered to endure the high pressures and temperatures within the fuel system. The tube’s construction includes precision-machined fittings and durable materials that enhance its performance and longevity. Additionally, its design ensures a secure connection to other fuel system components, minimizing the risk of leaks and ensuring a consistent fuel supply ⁴.

Benefits

Utilizing the Injector Fuel Supply Tube (3920222) offers several advantages. It contributes to improved fuel efficiency by ensuring that fuel is delivered to the injectors with minimal loss or contamination. This precise fuel delivery enhances engine performance, allowing for more efficient combustion. Furthermore, the tube’s durable construction and reliable operation increase the overall reliability of the fuel system, reducing the likelihood of unexpected failures ⁵.

Troubleshooting and Maintenance

To maintain optimal performance of the Injector Fuel Supply Tube (3920222), it is important to be aware of common issues and their symptoms. Malfunctions may manifest as fuel leaks, inconsistent engine performance, or difficulty starting the engine. Diagnostic procedures should include checking for leaks, assessing fuel pressure, and inspecting connections for signs of wear or damage. Regular maintenance practices, such as cleaning and inspecting the tube and its connections, can help prevent issues and ensure continued reliable operation ⁶.

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 and quality in the automotive industry. The company is committed to advancing technology and providing reliable, high-performance components for a wide range of applications, including heavy-duty trucks. Cummins’ dedication to excellence is evident in their product offerings, which are designed to meet the demanding requirements of modern engines ⁷.

Cummins Injector Fuel Supply Tube (Part 3920222) Compatibility

The Cummins Injector Fuel Supply Tube, identified by part number 3920222, is a critical component in the fuel delivery system of various Cummins engines. This part ensures the efficient transfer of fuel from the fuel supply line to the injectors, maintaining the engine’s performance and reliability.

Engine Compatibility

• 6B5.9 Series Engines

  • The Injector Fuel Supply Tube (3920222) is specifically designed to fit seamlessly within the 6B5.9 series engines. This series includes models such as the 6B5.9-C125, 6B5.9-C150, and others within the same family. The tube’s precise engineering ensures it aligns perfectly with the engine’s fuel injection system, facilitating optimal fuel flow and pressure.

• Group Compatibility

  • The part 3920222 is also compatible with a broader group of Cummins engines that share similar design and operational characteristics with the 6B5.9 series. These engines benefit from the tube’s robust construction and precise fit, ensuring consistent fuel delivery and enhancing overall engine efficiency.

The compatibility of the injector fuel supply tube with these engines underscores its importance in maintaining the integrity of the fuel system, ensuring that engines operate smoothly and efficiently ⁸.

Understanding the Role of Part 3920222 Injector Fuel Supply Tube in Engine Systems

The Injector Fuel Supply Tube, identified by part number 3920222, is an integral component within the fuel delivery system of an engine. Its primary function is to facilitate the precise and efficient transfer of fuel from the fuel rail to the individual injectors. This ensures that each injector receives a consistent and regulated fuel supply, which is essential for optimal engine performance.

Integration with Fuel Rail and Injectors

The Injector Fuel Supply Tube connects directly to the fuel rail, which is a pressurized conduit that distributes fuel to each injector. The tube’s design allows it to maintain fuel pressure while minimizing leaks, ensuring that the injectors operate under the correct conditions. Each injector is fitted with a nozzle that sprays atomized fuel into the combustion chamber. The consistent fuel pressure provided by the supply tube is vital for the injectors to atomize the fuel properly, leading to efficient combustion and reduced emissions ⁹.

Role in Fuel Plumbing

In the context of fuel plumbing, the Injector Fuel Supply Tube acts as a critical link between the fuel rail and the injectors. It is part of a network that includes fuel lines, filters, and regulators, all working together to deliver clean, pressurized fuel. The tube’s placement and connection points are engineered to reduce turbulence and ensure a smooth flow of fuel, which is important for maintaining fuel system efficiency and reliability ¹⁰.

Ensuring System Integrity

The Injector Fuel Supply Tube also plays a role in maintaining the integrity of the fuel system. By providing a sealed pathway for fuel, it helps prevent fuel leaks, which can be hazardous and lead to performance issues. Additionally, the tube is designed to withstand the high pressures and temperatures within the fuel system, ensuring long-term durability and reliability ¹¹.

Interaction with Engine Control Unit (ECU)

Modern engines are equipped with an Engine Control Unit (ECU) that monitors and adjusts fuel delivery based on various parameters such as engine load, RPM, and environmental conditions. The Injector Fuel Supply Tube is part of this dynamic system, as it ensures that the injectors can respond quickly to the ECU’s commands. This interaction is essential for achieving precise fuel control, which is necessary for optimal engine performance and fuel efficiency ¹².

Conclusion

The Injector Fuel Supply Tube (3920222) is a key component in the fuel delivery system, ensuring that fuel is delivered efficiently and reliably to the injectors. Its role in connecting the fuel rail to the injectors, maintaining system integrity, and interacting with the ECU underscores its importance in the overall functionality of the engine.