4378046
Diesel Exhaust Fluid Tank
Cummins®

The Cummins 4378046 Diesel Exhaust Fluid Tank is a component designed for use in heavy-duty trucks. Its purpose is to store Diesel Exhaust Fluid (DEF), which is utilized in the Selective Catalytic Reduction (SCR) system to reduce nitrogen oxides (NOx) emissions. This tank plays a role in ensuring that heavy-duty trucks meet emission standards and operate efficiently ¹.

Diesel Exhaust Fluid (DEF) Overview

Diesel Exhaust Fluid, commonly referred to as DEF, is a solution composed of deionized water and urea. It is employed in diesel engines to reduce emissions. When DEF is injected into the exhaust stream and heated, it decomposes into ammonia and carbon dioxide. The ammonia then reacts with NOx in the presence of a catalyst to form nitrogen and water vapor, thereby reducing harmful emissions ².

Function of the Diesel Exhaust Fluid Tank

The Diesel Exhaust Fluid Tank operates within the SCR system to store DEF. As the engine runs, DEF is dosed into the exhaust stream upstream of the SCR catalyst. The tank ensures a consistent supply of DEF, which is critical for the SCR system to function effectively in reducing NOx emissions ³.

Key Features of the Cummins 4378046 Diesel Exhaust Fluid Tank

The Cummins 4378046 Diesel Exhaust Fluid Tank is designed with several features that enhance its durability and efficiency. Constructed from high-quality materials, the tank is resistant to corrosion and capable of withstanding the demands of heavy-duty truck operations. Its design includes a secure fitting system to prevent leaks and ensure a reliable DEF supply to the SCR system.

Benefits of Using the Cummins 4378046 Diesel Exhaust Fluid Tank

Using the Cummins 4378046 Diesel Exhaust Fluid Tank offers several advantages. It contributes to improved emission control, helping trucks comply with environmental regulations. Additionally, efficient DEF management can lead to potential fuel efficiency gains, as the SCR system operates optimally with a consistent DEF supply.

Installation and Integration

Proper installation of the Cummins 4378046 Diesel Exhaust Fluid Tank involves integrating it with the truck’s SCR system and other components. It is important to follow manufacturer guidelines to ensure that the tank is securely fitted and connected to the DEF dosing system. This integration is vital for the SCR system to function correctly and reduce emissions effectively.

Maintenance and Troubleshooting

Routine maintenance of the Cummins 4378046 Diesel Exhaust Fluid Tank includes checking for leaks, ensuring the DEF level is adequate, and inspecting connections for security. Common issues may include DEF contamination or dosing system malfunctions. Troubleshooting tips involve verifying the DEF quality, checking system connections, and ensuring the SCR catalyst is functioning as intended.

Environmental Impact

The use of Diesel Exhaust Fluid Tanks, such as the Cummins 4378046, contributes to reducing the environmental footprint of heavy-duty trucks. By enabling the SCR system to effectively reduce NOx emissions, these tanks play a role in minimizing the impact of diesel engines on air quality and public health.

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 a commitment to sustainability, Cummins offers a wide range of products designed to meet the needs of various industries, including heavy-duty trucking. The company’s focus on environmental responsibility is evident in its development of emission control technologies, such as the SCR system and associated components like the Cummins 4378046 Diesel Exhaust Fluid Tank.

Compatibility of Cummins Diesel Exhaust Fluid Tank (Part 4378046)

The Cummins Diesel Exhaust Fluid (DEF) Tank, part number 4378046, is designed to store DEF, which is used to reduce nitrogen oxide (NOx) emissions in diesel exhaust. The DEF tank is compatible with a range of Cummins engines, ensuring that the SCR system functions optimally across various engine models.

Compatible Engines

• F3.8 CM2350
• F128C
• QSB6.7 CM2350 B105
• QSF3.8 CM2350 F107
• QSG12/X12 CM2350 G110
• QSL9 CM2350 L102
• QSX15 CM2350 X105

The DEF tank is engineered to seamlessly integrate with the specified Cummins engines, providing a reliable and efficient means of managing DEF storage and delivery. This compatibility ensures that the SCR system can effectively reduce NOx emissions, meeting stringent environmental regulations and maintaining engine performance.

Role of Diesel Exhaust Fluid Tank (Part 4378046) in Engine Systems

The Diesel Exhaust Fluid Tank (DEF Tank), identified by part number 4378046, is an integral component in modern diesel engine systems, particularly those equipped with Selective Catalytic Reduction (SCR) technology. This tank stores Diesel Exhaust Fluid (DEF), a urea-based solution that is injected into the exhaust stream to facilitate the conversion of harmful nitrogen oxides (NOx) into nitrogen and water vapor.

Integration with Key Engine Components

1. Exhaust Aftertreatment System: The DEF Tank is a vital part of the exhaust aftertreatment system. It supplies DEF to the dosing module, which injects the fluid into the exhaust stream upstream of the SCR catalyst. This process significantly reduces NOx emissions, ensuring compliance with stringent environmental regulations.

2. Dosing Module: The DEF Tank is connected to the dosing module via a series of hoses and fittings. The dosing module precisely controls the amount of DEF injected into the exhaust, based on signals from the engine control unit (ECU). This ensures optimal performance of the SCR catalyst.

3. Engine Control Unit (ECU): The ECU monitors various parameters such as exhaust temperature, engine load, and NOx levels. It sends commands to the dosing module to adjust the DEF injection rate accordingly. The DEF Tank must maintain a consistent supply of fluid to support these adjustments.

4. Level Sensor: Many DEF Tanks are equipped with a level sensor that monitors the fluid level. This sensor sends data to the ECU, allowing it to alert the operator when the DEF level is low. This ensures that the tank is refilled in a timely manner, preventing interruptions in the aftertreatment process.

5. Refill Port: The DEF Tank features a refill port, typically located in an accessible area of the vehicle. This port allows for easy refilling of the tank with DEF, ensuring continuous operation of the aftertreatment system.

6. Heating Element (Optional): Some DEF Tanks include a heating element to prevent the fluid from freezing in cold temperatures. This element is controlled by the ECU and activates when necessary to maintain the DEF in a liquid state.

Operational Synergy

The DEF Tank operates in close coordination with the exhaust aftertreatment system, dosing module, and ECU to ensure efficient reduction of NOx emissions. Its role is to provide a reliable and consistent supply of DEF, enabling the SCR system to function effectively under varying operating conditions.

Conclusion

The Cummins 4378046 Diesel Exhaust Fluid Tank is a critical component in the SCR system of heavy-duty trucks, designed to store DEF and ensure efficient reduction of NOx emissions. Its compatibility with various Cummins engines, robust construction, and integration with key engine components make it an essential part of modern diesel engine systems. Proper installation, maintenance, and understanding of its role in emission control are vital for optimal performance and environmental compliance.