4900302
Injector Fuel Supply Tube
Cummins®

Introduction

The Fuel Injector Supply Tube (4900302) by Cummins is designed to facilitate the efficient delivery of fuel from the fuel system to the injectors in heavy-duty trucks. This Cummins part is integral to the operation of the vehicle, ensuring that the engine receives a consistent and precise amount of fuel for optimal performance ¹.

Basic Concepts

Fuel injector supply tubes are fundamental components within the fuel system of diesel engines. Their primary function is to transport fuel from the fuel rail to the injectors. This process is vital for maintaining the correct fuel pressure and ensuring that the injectors operate efficiently. The performance of the supply tube directly influences the engine’s overall efficiency and power output ².

Purpose and Role

The 4900302 Fuel Injector Supply Tube serves a specific purpose in the operation of a truck. It is responsible for delivering fuel to the injectors under consistent pressure. This ensures that the fuel is atomized correctly upon injection into the combustion chamber, which is crucial for efficient combustion and engine performance. The tube’s role in maintaining fuel pressure is also significant, as it helps to prevent issues such as fuel starvation or inconsistent fuel delivery ³.

Key Features

The 4900302 Fuel Injector Supply Tube is constructed from high-quality materials that are resistant to the corrosive effects of diesel fuel and the high pressures within the fuel system. Its design specifications include precise dimensions to ensure a snug fit within the fuel system, minimizing the risk of leaks. Additionally, the tube may feature unique characteristics such as reinforced sections to withstand the rigors of heavy-duty use, enhancing its performance and durability ⁴.

Benefits

Utilizing the 4900302 Fuel Injector Supply Tube can lead to several benefits. These include improved fuel efficiency due to the precise delivery of fuel, enhanced engine performance as a result of consistent fuel pressure, and increased reliability under demanding operating conditions. The tube’s durable construction also contributes to the longevity of the fuel system, reducing the need for frequent replacements ¹.

Troubleshooting and Maintenance

Common issues with the 4900302 Fuel Injector Supply Tube may include leaks, blockages, or damage from wear and tear. Troubleshooting steps may involve inspecting the tube for visible damage, checking for proper seating within the fuel system, and ensuring that all connections are secure. Regular maintenance practices, such as cleaning the fuel system and replacing the tube as part of scheduled maintenance, can help to ensure optimal performance and longevity ².

Installation and Compatibility

Proper installation of the 4900302 Fuel Injector Supply Tube is crucial for its effective operation. This involves ensuring that the tube is correctly aligned with the fuel rail and injectors, and that all connections are tightened to the manufacturer’s specifications. Compatibility with specific truck models or engine configurations should be verified to ensure that the tube fits correctly and functions as intended within the fuel system ³.

Performance Considerations

The 4900302 Fuel Injector Supply Tube contributes to overall engine performance by ensuring precise fuel delivery and consistent pressure regulation. These factors are important for efficient combustion, which in turn affects the engine’s power output and fuel efficiency. Additionally, the tube’s impact on emissions is noteworthy, as proper fuel delivery and pressure can lead to more complete combustion, potentially reducing harmful emissions ⁴.

Cummins Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a history of innovation and a strong reputation in the automotive industry, Cummins is committed to delivering high-quality components that meet the demanding requirements of heavy-duty applications. The company’s focus on quality and performance is evident in its range of automotive components, including the 4900302 Fuel Injector Supply Tube ¹.

Compatibility with Cummins Engines

A2000 Series Engines

The A2000 series engines, known for their robust design and reliability, integrate the 4900302 supply tube seamlessly. This part is engineered to fit precisely within the engine’s fuel system architecture, ensuring that the fuel injectors receive the correct amount of fuel under varying operating conditions ².

A2300 Series Engines

Similarly, the A2300 series engines benefit from the use of the 4900302 supply tube. These engines, which are designed for heavy-duty applications, require a fuel delivery system that can handle high pressures and deliver fuel efficiently. The 4900302 supply tube is specifically designed to meet these demands, ensuring that the fuel injectors operate smoothly and efficiently ³.

Grouping for Compatibility

Both the A2000 and A2300 series engines share a common design philosophy in their fuel systems, which allows the 4900302 supply tube to be used across these models. This commonality simplifies maintenance and repair processes, as technicians can use the same part for multiple engine types. The 4900302 supply tube’s design ensures that it fits perfectly within the fuel system of both series, providing a reliable and efficient fuel delivery mechanism ⁴.

Role of Part 4900302 Fuel Injector Supply Tube in Engine Systems

The 4900302 Fuel Injector Supply Tube is an essential component in the fuel delivery system of an engine. It is responsible for transporting fuel from the fuel rail to the individual fuel injectors. This tube ensures a consistent and regulated flow of fuel, which is vital for the precise operation of the fuel injectors ¹.

Integration with Fuel Rail

The Fuel Injector Supply Tube connects directly to the fuel rail, which is a manifold that distributes fuel to each injector. The tube’s design allows it to fit securely into the fuel rail, creating a sealed pathway for fuel. This connection is typically achieved through O-rings or gaskets that prevent fuel leaks and maintain system integrity ².

Interaction with Fuel Injectors

Each fuel injector is supplied with fuel via the Fuel Injector Supply Tube. The tube’s precise diameter and smooth interior help maintain fuel pressure and flow rate, ensuring that each injector receives the correct amount of fuel at the right time. This is particularly important in engines that use multi-point fuel injection, where each cylinder has its own injector ³.

Coordination with Fuel Pump and Regulator

The Fuel Injector Supply Tube works in conjunction with the fuel pump and fuel pressure regulator. The fuel pump pressurizes the fuel, which is then regulated to a consistent pressure by the fuel pressure regulator. The supply tube must be able to withstand this pressure while delivering fuel efficiently to the injectors ⁴.

Role in Fuel Return System

In systems that employ a return-style fuel delivery, excess fuel is sent back to the fuel tank via a return line. The Fuel Injector Supply Tube is part of this closed-loop system, ensuring that only the necessary amount of fuel is delivered to the injectors, with the remainder returned to maintain a stable fuel pressure ¹.

Contribution to Engine Performance

The consistent and regulated fuel delivery provided by the Fuel Injector Supply Tube directly impacts engine performance. It ensures that the air-fuel mixture is optimal, which enhances combustion efficiency, power output, and fuel economy. Additionally, it helps reduce emissions by promoting cleaner and more complete combustion ².

Maintenance and Reliability

Regular inspection and maintenance of the Fuel Injector Supply Tube are important to ensure its reliability. Over time, the tube may develop leaks or blockages, which can affect fuel delivery and engine performance. Proper sealing and secure connections are essential to prevent fuel leaks, which can be hazardous and lead to engine misfires or stalls ³.

Conclusion

The 4900302 Fuel Injector Supply Tube plays a significant role in the fuel delivery system by ensuring a consistent and regulated flow of fuel to the injectors, thereby contributing to overall engine performance and efficiency. Its compatibility with various Cummins engine models, robust construction, and precise design make it a reliable component for heavy-duty applications ⁴.