5471900
Doser Pump
Cummins®

The Cummins 5471900 Doser Pump is a component designed for use in commercial trucks. Its purpose is to facilitate the injection of Diesel Exhaust Fluid (DEF) into the exhaust stream of diesel engines. This process is integral to the operation of the Selective Catalytic Reduction (SCR) system, which is employed to reduce nitrogen oxides (NOx) emissions. The significance of this Cummins part lies in its contribution to meeting stringent emissions standards, thereby ensuring that commercial trucks operate in an environmentally responsible manner ¹.

Basic Concepts of Doser Pumps

A doser pump is a device that meters and injects DEF into the exhaust stream of a diesel engine. Within the engine system, the doser pump works in conjunction with the SCR system to convert NOx into harmless nitrogen and water vapor. This is achieved through a chemical reaction that occurs when DEF is sprayed into the exhaust stream and heated by the exhaust gases. The doser pump’s role in emissions control is therefore pivotal, as it ensures that the SCR system functions effectively ².

Purpose of the 5471900 Doser Pump

This part plays a specific role in the operation of a truck by facilitating the precise delivery of DEF to the SCR system. The pump is responsible for injecting DEF at the correct rate and timing to optimize the reduction of NOx emissions. Its function within the SCR system is to enhance the efficiency of the catalytic conversion process, ensuring that emissions are kept within regulatory limits ³.

Key Features

The 5471900 incorporates several key features that contribute to its effectiveness. These include a robust design that ensures durability under the demanding conditions of commercial truck operation. The pump is constructed using high-quality materials to withstand the corrosive nature of DEF and the high temperatures of the exhaust system. Technological advancements such as precise metering capabilities and integrated diagnostics further enhance the pump’s performance and reliability.

Benefits of Using the 5471900 Doser Pump

The use of this Cummins part offers several advantages. It contributes to improved emissions performance by ensuring that the SCR system operates efficiently. This results in a reduction of NOx emissions, which is beneficial for environmental compliance. Additionally, the pump’s precise DEF delivery can enhance engine efficiency by supporting optimal SCR system function. Compliance with environmental regulations is also facilitated by the pump’s reliable operation.

Installation Process

Installing the 5471900 involves several steps. Initially, it is important to ensure that the truck’s engine is turned off and that the exhaust system has cooled down. The necessary tools, such as wrenches and a torque wrench, should be prepared. The existing doser pump, if present, is removed by disconnecting the electrical connector and unbolting it from the exhaust system. The new 5471900 is then positioned and secured in place, with the electrical connector reattached. Finally, the system should be tested to confirm proper operation.

Common Issues and Troubleshooting

Common problems associated with the 5471900 may include issues with DEF delivery, such as under-dosing or over-dosing, which can affect emissions performance. Troubleshooting may involve checking the electrical connections, ensuring the pump is securely mounted, and verifying that the DEF quality is within specifications. Solutions may range from simple adjustments to more complex repairs or replacements, depending on the issue identified.

Maintenance Tips

To ensure the longevity and optimal performance of the 5471900, regular maintenance practices are recommended. This includes periodic inspection of the pump and its connections for signs of wear or damage. It is also important to use high-quality DEF to prevent contamination and ensure efficient operation of the SCR system. Monitoring the pump’s performance through diagnostic tools can help identify potential issues before they become significant problems.

Cummins Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes a wide range of power solutions, including diesel and natural gas engines, as well as related technologies. With a history spanning over a century, Cummins has established itself as a key player in the automotive industry, particularly in the development of diesel engine components. The company’s commitment to innovation and sustainability is reflected in its product offerings, which aim to deliver reliable performance while meeting environmental standards.

Compatibility with Cummins Engines

The Doser Pump 5471900, manufactured by Cummins, is a critical component designed to fit seamlessly with several of their engine models. This part is integral to the proper functioning of the engine’s fuel system, ensuring efficient and precise fuel delivery.

QSK50 CM2350 K108 and QSK95 CM2350 K113

The 5471900 is specifically engineered to integrate with the QSK50 CM2350 K108 and QSK95 CM2350 K113 engines. These engines are part of Cummins’ QSK series, known for their robust performance and reliability in demanding applications. The doser pump’s design ensures that it can handle the high-pressure requirements and the precise fuel metering necessary for these engines to operate at peak efficiency.

QST30 CM2350 T101

Similarly, the QST30 CM2350 T101 engine also benefits from the 5471900. This engine, part of the QST series, is designed for applications that require a balance of power and efficiency. The doser pump’s compatibility with the QST30 CM2350 T101 ensures that it can deliver the precise fuel delivery needed for optimal engine performance.

Integration and Functionality

The 5471900 is designed to fit into the fuel system architecture of these engines, ensuring that it can effectively manage fuel flow and pressure. This compatibility is crucial for maintaining the engine’s performance and longevity, as the doser pump plays a key role in the fuel injection process.

By ensuring that the doser pump is correctly integrated with the engine, operators can expect reliable and efficient fuel delivery, which is essential for the smooth operation of these powerful engines.

Role of Part 5471900 Doser Pump in Engine Systems

The 5471900 is an integral component within engine systems, specifically designed to enhance the efficiency and performance of the Selective Catalytic Reduction (SCR) system. This pump is responsible for the precise delivery of Diesel Exhaust Fluid (DEF), also known as AdBlue, into the exhaust stream.

Interaction with the Decomposition Reactor

Once the DEF is injected by the Doser Pump, it travels into the decomposition reactor. Here, the DEF decomposes into ammonia and carbon dioxide under the high temperatures of the exhaust gases. The ammonia then reacts with the nitrogen oxides (NOx) in the exhaust, converting them into harmless nitrogen and water vapor. This process significantly reduces the emission of pollutants, ensuring the engine meets environmental regulations.

Precision in Dosing

The efficiency of the SCR system heavily relies on the accurate dosing of DEF. The 5471900 ensures that the correct amount of DEF is delivered at the right time, optimizing the reduction of NOx emissions. This precision is vital for maintaining the balance between emission control and engine performance.

Integration with Engine Control Unit (ECU)

The Doser Pump operates in conjunction with the Engine Control Unit (ECU), which monitors various parameters such as exhaust temperature, engine load, and speed. The ECU sends signals to the Doser Pump to adjust the DEF dosage accordingly, ensuring optimal performance under varying operating conditions.

Maintenance of System Integrity

Regular maintenance of the Doser Pump is essential to prevent issues such as clogging or malfunction, which can lead to inefficient DEF delivery. Proper upkeep ensures the longevity and reliability of the SCR system, contributing to overall engine health and compliance with emission standards.

Conclusion

In summary, the 5471900 plays a significant role in the effective functioning of the SCR system by ensuring the precise and timely delivery of DEF, which is crucial for the decomposition process in the reactor and the subsequent reduction of NOx emissions. Its integration with Cummins engines and the Engine Control Unit (ECU) underscores its importance in maintaining engine performance and environmental compliance.