3979747
Injector Fuel Supply Tube
Cummins®

The Cummins Injector Fuel Supply Tube, identified by Part #3979747, is a vital component in the fuel system of heavy-duty trucks. It ensures efficient engine performance by facilitating the precise delivery of fuel to the injectors. This component is integral to maintaining the optimal operation of the engine, contributing to both performance and reliability.

Basic Concepts of Injector Fuel Supply Tubes

An Injector Fuel Supply Tube is a conduit within the fuel injection system that delivers fuel from the fuel rail to the injectors. Its function is to provide a consistent and pressurized flow of fuel, ensuring that the injectors receive the necessary amount of fuel for combustion. The efficiency of this component directly impacts the overall performance of the fuel injection system, making it a critical element in the engine’s operation ¹.

Purpose and Role in Truck Operation

The Cummins Injector Fuel Supply Tube (Part #3979747) serves a specific purpose in the operation of heavy-duty trucks by ensuring efficient fuel delivery to the injectors. This component contributes to the precise atomization of fuel, which is crucial for optimal combustion and engine performance. By maintaining a consistent fuel supply, it helps in achieving the desired power output and fuel efficiency, playing a key role in the truck’s overall operation ².

Key Features

The Cummins Injector Fuel Supply Tube is designed with several key features that enhance its functionality and durability. It is constructed from high-quality materials to withstand the high pressures and temperatures within the fuel system. The design includes precise engineering to ensure a secure fit and reliable performance. Additionally, it may feature unique characteristics such as corrosion-resistant coatings or reinforced sections to improve longevity and reliability in demanding operating conditions ³.

Benefits

Using the Cummins Injector Fuel Supply Tube offers several benefits. It contributes to improved fuel atomization, which enhances combustion efficiency and engine performance. The component’s durable construction ensures increased reliability, even under challenging conditions. Furthermore, its precise design helps in maintaining consistent fuel delivery, which is vital for the engine’s optimal operation and longevity.

Installation and Compatibility

Proper installation of the Cummins Injector Fuel Supply Tube is crucial for ensuring its effective performance. Installation procedures should follow manufacturer guidelines to ensure a secure and leak-free connection. Compatibility with various Cummins engine models and fuel systems is an important consideration, ensuring that the component integrates seamlessly into the existing system without requiring modifications.

Troubleshooting and Maintenance

Regular maintenance and troubleshooting are important for ensuring the optimal performance and longevity of the Cummins Injector Fuel Supply Tube. Common issues such as leaks or blockages can be addressed through routine inspections and cleaning. Maintenance practices should include checking for signs of wear or damage, ensuring tight connections, and replacing the component if necessary to prevent potential failures.

Cummins Overview

Cummins Inc. is a renowned manufacturer in the automotive industry, known for its high-quality components for heavy-duty trucks. With a rich history and a strong reputation for reliability and performance, Cummins is committed to producing components that meet the demanding requirements of modern engines. The company’s dedication to innovation and quality ensures that its products, including the Injector Fuel Supply Tube, deliver exceptional performance and durability.

Cummins Injector Fuel Supply Tube (Part 3979747) Compatibility

The Cummins Injector Fuel Supply Tube, identified by part number 3979747, is a critical component in the fuel delivery system of various Cummins engines. This part ensures that fuel is efficiently and accurately delivered to the injectors, which is essential for maintaining optimal engine performance and efficiency.

Compatible Engines

• 4B3.9: This part is specifically designed to fit seamlessly with the 4B3.9 engine model. It plays a pivotal role in the fuel supply mechanism, ensuring that the injectors receive the correct amount of fuel under varying operating conditions.

• Other Cummins Engines: While the primary focus is on the 4B3.9 engine, the injector fuel supply tube (part 3979747) is also compatible with a range of other Cummins engine models. These engines share similar design principles and fuel delivery requirements, making this part a versatile choice for multiple applications.

The compatibility of the Cummins Injector Fuel Supply Tube with these engines underscores its importance in maintaining the integrity and performance of the fuel delivery system. Proper installation and maintenance of this part are crucial for ensuring that the engine operates smoothly and efficiently.

Role of Part 3979747 Injector Fuel Supply Tube in Engine Systems

The Injector Fuel Supply Tube, identified by part number 3979747, is an integral component in the fuel delivery system of an engine. This tube facilitates the precise and efficient transfer of fuel from the fuel rail to the fuel injectors.

Integration with Fuel System Components

1. Fuel Rail: The Injector Fuel Supply Tube connects directly to the fuel rail, which is a pressurized conduit that distributes fuel to each injector. The tube ensures a consistent and reliable fuel supply, maintaining the required pressure levels for optimal injector performance.

2. Fuel Injectors: Each fuel injector is supplied with fuel through the Injector Fuel Supply Tube. The tube’s design allows for minimal pressure drop, ensuring that each injector receives the exact amount of fuel needed for combustion. This precision is vital for engine performance and fuel efficiency.

3. Fuel Filter: Positioned upstream in the fuel system, the fuel filter removes impurities from the fuel before it reaches the Injector Fuel Supply Tube. Clean fuel is essential to prevent clogging and ensure the longevity of the injectors and other fuel system components.

4. Fuel Pump: The fuel pump pressurizes the fuel, which is then delivered through the Injector Fuel Supply Tube to the fuel rail. The tube must withstand this pressure while maintaining a leak-free connection, ensuring that the fuel system operates efficiently.

5. Plumbing Connections: The Injector Fuel Supply Tube interfaces with various plumbing components, including hoses and fittings, to create a sealed and secure fuel delivery pathway. These connections are designed to prevent fuel leaks and maintain system integrity.

Functionality in the Fuel Delivery Process

The Injector Fuel Supply Tube plays a significant role in the overall fuel delivery process:

• Pressure Regulation: It helps maintain consistent fuel pressure within the system, which is essential for the proper atomization of fuel in the combustion chamber.
• Flow Management: The tube ensures a steady flow of fuel to the injectors, which is critical for maintaining engine performance under varying load conditions.
• System Integrity: By providing a reliable connection between the fuel rail and injectors, the tube contributes to the overall integrity and efficiency of the fuel system.

Conclusion

In summary, the Cummins Injector Fuel Supply Tube (part 3979747) is a key component that ensures the efficient and reliable delivery of fuel within engine systems, interfacing with various fuel system components to maintain optimal performance. Proper installation, maintenance, and understanding of its role are essential for ensuring the longevity and efficiency of the engine.