3930847
Fuel Manifold
Cummins®

Introduction

The Cummins 3930847 Fuel Manifold is a component designed for use in commercial trucks. It plays a role in the fuel system by facilitating the distribution of fuel to the engine’s cylinders. This part ensures that each cylinder receives the appropriate amount of fuel for combustion, which is vital for the engine’s operation and overall performance.

Basic Concepts of Fuel Manifolds

A fuel manifold is a device that distributes fuel from the fuel supply system to the engine’s combustion chambers. It operates by receiving pressurized fuel and then channeling it through a series of passages or runners to each cylinder. The efficient distribution of fuel is crucial for maintaining engine performance, ensuring that each cylinder operates under optimal conditions. This component is integral to the engine’s fuel system, contributing to the overall efficiency and reliability of the engine ¹.

Role of the 3930847 Fuel Manifold

The Cummins 3930847 Fuel Manifold ensures that fuel is evenly distributed to the engine’s cylinders. It interacts with other engine components, such as the fuel injectors and the engine control unit (ECU), to regulate fuel flow based on the engine’s demand. This interaction contributes to the engine’s performance by allowing for precise fuel delivery, which is essential for efficient combustion and power generation ².

Key Features

The Cummins 3930847 Fuel Manifold is characterized by its robust design and the use of high-quality materials. It is engineered to withstand the high pressures and temperatures associated with diesel engines. The manifold’s design includes features that enhance its functionality and durability, such as precision-machined passages for optimal fuel flow and corrosion-resistant materials to ensure longevity in various operating conditions ³.

Benefits

The Cummins 3930847 Fuel Manifold offers several benefits, including improved fuel efficiency and enhanced engine performance. By ensuring that fuel is evenly distributed to each cylinder, it contributes to more complete combustion, which can lead to better fuel economy. Additionally, the manifold’s design and materials contribute to its reliability, making it a durable component that can withstand the rigors of commercial truck operation.

Troubleshooting and Maintenance

Common issues with the Cummins 3930847 Fuel Manifold may include fuel leaks, blockages, or malfunctions due to wear and tear. Troubleshooting steps may involve inspecting the manifold for signs of damage, checking fuel lines for leaks, and ensuring that all connections are secure. Regular maintenance practices, such as cleaning the manifold and inspecting it for wear, can help ensure optimal performance and longevity. It is also important to follow the manufacturer’s guidelines for maintenance and replacement to avoid potential issues.

About Cummins

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 industry, Cummins is committed to producing high-quality automotive components. The company’s products are known for their reliability, efficiency, and durability, making them a preferred choice for commercial vehicle applications. Cummins’ commitment to quality and performance is evident in its wide range of engine components, including the Cummins 3930847 Fuel Manifold.

Compatibility

The Cummins Fuel Manifold part number 3930847 is designed to integrate seamlessly with various Cummins engines, ensuring optimal fuel delivery and performance. This part is engineered to fit into the engine architecture of the following Cummins engines:

• 6B5.9

This part is a critical component that manages the distribution of fuel to the engine’s cylinders. It ensures that the fuel is delivered at the correct pressure and timing, which is essential for the engine’s efficiency and power output. This part is specifically designed to work with the intricate fuel systems of Cummins engines, providing a reliable and durable solution for maintaining engine performance.

When installing the 3930847 Fuel Manifold, it is important to follow the manufacturer’s guidelines to ensure proper fitment and function. This includes verifying that the manifold is compatible with the engine’s fuel lines, connectors, and other related components. Proper installation and maintenance of the fuel manifold are crucial for the longevity and efficiency of the engine.

Integration with Fuel System Components

1. Fuel Injectors: The Fuel Manifold is connected to the fuel injectors, which are responsible for spraying atomized fuel into the combustion chamber. The manifold ensures that fuel is evenly distributed to each injector, maintaining balanced fuel delivery across all cylinders.

2. Fuel Rail: Often, the Fuel Manifold is part of the fuel rail system. It works in conjunction with the fuel rail to maintain fuel pressure and provide a pathway for fuel to travel from the fuel pump to the injectors.

3. Fuel Pressure Regulator: The manifold may also connect to the fuel pressure regulator, which controls the pressure of the fuel entering the injectors. This ensures that the fuel is delivered at the correct pressure for efficient atomization and combustion.

Interaction with Plumbing Components

1. Fuel Lines: The Fuel Manifold is linked to the fuel lines that transport fuel from the tank to the engine. It acts as a junction point, allowing multiple fuel lines to converge and branch out to the respective injectors.

2. Return Lines: In systems where excess fuel is returned to the tank, the manifold may also connect to return lines. This helps in managing fuel flow and pressure within the system.

3. O-Rings and Seals: To ensure a leak-free system, the Fuel Manifold incorporates O-rings and seals at connection points. These components prevent fuel leaks and maintain the integrity of the fuel delivery system.

Overall Function in the Engine System

The 3930847 Fuel Manifold plays a significant role in the overall function of the engine by ensuring that fuel is distributed efficiently and consistently. This component helps in achieving better fuel economy, enhanced engine performance, and reduced emissions by promoting precise fuel delivery to each cylinder.

Conclusion

The Cummins 3930847 Fuel Manifold is a critical component in the fuel delivery system of an engine, facilitating the efficient distribution of fuel to various engine components. Its robust design, integration with fuel system components, and interaction with plumbing components ensure optimal engine performance and reliability. Regular maintenance and proper installation are essential for the longevity and efficiency of the engine.