5375482
Doser Pump
Cummins®

Introduction

The Cummins 5375482 Doser Pump is a specialized component designed for use in heavy-duty trucks. Its primary function is to inject Diesel Exhaust Fluid (DEF) into the exhaust stream, which is a key process in the Selective Catalytic Reduction (SCR) system. This system is integral to reducing nitrogen oxide (NOx) emissions, thereby ensuring compliance with stringent environmental regulations ¹.

Basic Concepts of Doser Pumps

A doser pump is a device that precisely injects DEF into the exhaust stream of diesel engines. This injection facilitates the conversion of NOx into harmless nitrogen and water vapor through a chemical reaction within the SCR catalyst. The doser pump’s role is vital in maintaining the efficiency of the SCR system and ensuring that emissions remain within regulatory limits ².

Purpose of the Cummins 5375482 Doser Pump

The Cummins 5375482 Doser Pump plays a significant role in the truck’s operation by facilitating the SCR process. It ensures that DEF is delivered in the correct quantity and at the right time to maximize the reduction of NOx emissions. This component is engineered to work seamlessly with the truck’s engine system, contributing to overall emission control and environmental compliance ³.

Key Features

The Cummins 5375482 Doser Pump is characterized by several key features that enhance its performance and reliability. These include a robust design that withstands the harsh conditions of heavy-duty truck operations, the use of high-quality materials to ensure durability, and advanced technological features that improve precision and efficiency in DEF delivery.

Benefits of Using the Cummins 5375482 Doser Pump

Utilizing the Cummins 5375482 Doser Pump offers several advantages. It contributes to improved engine efficiency by ensuring optimal DEF injection, which is crucial for the SCR system’s effectiveness. Additionally, it aids in reducing emissions, helping trucks meet environmental regulations. The pump’s reliable performance also supports long-term compliance with emission standards.

Installation and Integration

Proper installation of the Cummins 5375482 Doser Pump is crucial for its effective operation. It should be integrated into the truck’s engine system according to manufacturer guidelines, ensuring all connections are secure and the system is calibrated correctly. Attention to detail during installation helps prevent issues and ensures the doser pump functions as intended.

Troubleshooting and Maintenance

Common issues with the doser pump may include clogging, leaks, or electrical faults. Regular maintenance, such as cleaning the injector and checking for leaks, can help prevent these problems. Diagnostic procedures should be followed to identify and address any issues promptly, ensuring the doser pump continues to operate efficiently.

Performance and Efficiency

The Cummins 5375482 Doser Pump contributes to the overall performance and fuel efficiency of the truck by ensuring the SCR system operates effectively. Proper DEF injection leads to reduced NOx emissions, which can indirectly support fuel efficiency by maintaining optimal engine performance. Data and examples from real-world applications demonstrate the pump’s positive impact on truck operations.

Environmental Impact

The doser pump plays a role in reducing harmful emissions from heavy-duty trucks. By facilitating the SCR process, it helps convert NOx into less harmful substances, contributing to environmental sustainability in the trucking industry. This component is a key part of efforts to minimize the environmental footprint of diesel engines.

Cummins Corporation 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 quality, Cummins is committed to providing reliable and efficient solutions for various industries, including automotive and heavy-duty trucking. The company’s product range reflects its dedication to advancing technology and meeting the needs of its customers.

Compatibility

This part is engineered to fit seamlessly within the Cummins QSK50, CM2350, and K108 engines, providing reliable and efficient fuel management. For the QSK50 and CM2350 engines, the doser pump is integral to maintaining optimal fuel delivery, ensuring that the engines operate at peak performance levels. In the K108 engine, the doser pump plays a similar role, ensuring that fuel is delivered accurately to the combustion chambers.

Role in Engine Systems

The Cummins 5375482 Doser Pump is an integral component in the selective catalytic reduction (SCR) system of modern diesel engines. Its primary function is to inject a precise amount of Diesel Exhaust Fluid (DEF), also known as AdBlue, into the exhaust stream. This injection occurs upstream of the SCR catalyst, where the DEF reacts with nitrogen oxides (NOx) to convert them into harmless nitrogen and water vapor.

Interaction with Key Components

1. Exhaust Gas Recirculation (EGR) System: The doser pump works in conjunction with the EGR system to reduce NOx emissions. By injecting DEF into the exhaust stream, the doser pump enhances the efficiency of the EGR system, allowing for better control over emissions.

2. SCR Catalyst: The DEF injected by the doser pump reacts on the surface of the SCR catalyst. This reaction is essential for the catalyst to effectively reduce NOx levels, ensuring the engine meets emissions standards.

3. Engine Control Unit (ECU): The ECU monitors various parameters such as exhaust temperature, engine load, and NOx levels. Based on this data, the ECU sends signals to the doser pump to inject the appropriate amount of DEF, ensuring optimal performance and emissions control.

4. DEF Tank and Pump: The doser pump is supplied with DEF from the DEF tank via a dedicated pump. The doser pump then meters this fluid and injects it into the exhaust stream as needed.

5. NOx Sensor: Located both upstream and downstream of the SCR catalyst, NOx sensors provide real-time data on NOx levels. The doser pump’s injection rate is adjusted based on this sensor data to maintain efficient NOx reduction.

6. Aftertreatment System: The doser pump is a key component in the overall aftertreatment system, which includes the DOC (Diesel Oxidation Catalyst), DPF (Diesel Particulate Filter), and SCR catalyst. Each of these components works in tandem to clean the exhaust gases before they are released into the atmosphere.

Conclusion

In summary, the Cummins 5375482 Doser Pump plays a significant role in the effective functioning of the SCR system, ensuring that diesel engines operate within permissible emissions limits while maintaining performance efficiency. Its integration with key engine components and the Cummins engine lineup underscores its versatility and importance in modern diesel engine systems.