5505779
Doser Pump
Cummins®

The Cummins 5505779 Dosing Pump is a component designed for use in commercial trucks, specifically within their emissions control systems. Its purpose is to help manage and reduce the emission of pollutants, ensuring that the vehicle operates within regulatory standards. This part plays a role in the selective catalytic reduction (SCR) system by delivering a precise amount of diesel exhaust fluid (DEF) into the exhaust stream, which aids in the reduction of nitrogen oxides (NOx) emissions ¹.

Basic Concepts of Dosing Pumps

A dosing pump is a device used in the emissions control systems of diesel engines to inject DEF into the exhaust stream. The DEF, when introduced into the exhaust, reacts with NOx in the presence of a catalyst, converting these harmful gases into nitrogen and water vapor. This process is known as selective catalytic reduction. The dosing pump operates by using a plunger or diaphragm mechanism to meter and deliver DEF at specific intervals and in precise quantities, based on engine load and exhaust temperature ².

Role of the 5505779 Dosing Pump in Truck Operation

This Cummins part is integral to the truck’s emissions control system. It ensures that DEF is injected into the exhaust stream at the correct time and in the right amount to effectively reduce NOx emissions. By doing so, it helps the truck meet stringent emissions regulations and maintain cleaner air quality. The pump’s operation is controlled by the engine’s electronic control unit (ECU), which monitors various parameters to determine the optimal DEF dosage ³.

Key Features of the 5505779 Dosing Pump

The Cummins 5505779 Dosing Pump is characterized by its robust design and construction, which includes high-quality materials that resist corrosion and wear. It features a precise metering system that ensures accurate DEF delivery, and its compact design allows for easy integration into the truck’s emissions control system. Additionally, the pump is equipped with sensors that provide feedback to the ECU, allowing for real-time adjustments to DEF injection ⁴.

Benefits of Using the 5505779 Dosing Pump

Utilizing this Cummins part offers several advantages. It contributes to improved emissions performance by effectively reducing NOx emissions, helping the vehicle comply with emissions regulations. The pump’s precise DEF delivery can also lead to potential fuel efficiency gains, as the SCR system operates more efficiently. Furthermore, by maintaining lower emissions, the pump supports environmental sustainability efforts.

Installation and Integration

When installing the Cummins 5505779 Dosing Pump, it is important to follow manufacturer guidelines to ensure proper integration into the truck’s emissions control system. This may involve making necessary modifications or adjustments to the exhaust system to accommodate the pump. Careful attention to the pump’s orientation and secure mounting is crucial to prevent DEF leaks and ensure reliable operation.

Maintenance and Troubleshooting

To maintain the Cummins 5505779 Dosing Pump and ensure its optimal performance, regular inspections and servicing are recommended. This includes checking for DEF leaks, verifying the pump’s electrical connections, and ensuring the DEF injector is clean and unobstructed. Common troubleshooting techniques involve diagnosing error codes related to DEF injection and addressing any issues with the pump’s operation or the SCR system.

Environmental Impact

The use of the Cummins 5505779 Dosing Pump has a positive environmental impact by reducing the emission of harmful pollutants from commercial trucks. By effectively lowering NOx emissions through the SCR process, the pump contributes to improved air quality and helps mitigate the environmental effects associated with diesel engine operation.

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 commitment to sustainability, Cummins offers a wide range of products and services for various industries, including transportation, construction, and power generation. The company is dedicated to advancing technology and providing solutions that meet the evolving needs of its customers while promoting environmental stewardship.

Compatibility of Dosing Pump 5505779 with Cummins Engines

The Dosing Pump 5505779, manufactured by Cummins, is a critical component designed to ensure precise fuel delivery and management in various engine configurations. This part is integral to the operation of several Cummins engines, providing the necessary control and efficiency required for optimal performance.

L9 CM2670 L128B

In the L9 CM2670 L128B engine, the Dosing Pump 5505779 plays a pivotal role in maintaining the delicate balance of fuel injection. This engine, known for its robust design and reliability, benefits from the precision dosing capabilities of the pump. The integration of this part ensures that the engine operates smoothly, delivering consistent power and efficiency.

X15 CM2450 X134B

Similarly, the X15 CM2450 X134B engine relies on the Dosing Pump 5505779 to manage its fuel delivery system. This engine, which is part of a series recognized for its versatility and performance, utilizes the pump to enhance the accuracy of fuel dosing. The result is a more efficient combustion process, contributing to the engine’s overall performance and longevity.

Grouping of Engines

Both the L9 CM2670 L128B and X15 CM2450 X134B engines share a common requirement for precise fuel management, making the Dosing Pump 5505779 a compatible and essential component for both. This part’s ability to deliver accurate fuel dosing is crucial for maintaining the high standards of performance and reliability that these engines are known for.

Role of Part 5505779 Dosing Pump in Aftertreatment Device

The part 5505779 dosing pump is an integral component in the aftertreatment device of an engine system. Its primary function is to deliver precise amounts of Diesel Exhaust Fluid (DEF) into the exhaust stream. This process is essential for the Selective Catalytic Reduction (SCR) system to operate effectively.

When the dosing pump injects DEF into the exhaust, it decomposes into ammonia and carbon dioxide. The ammonia then reacts with nitrogen oxides (NOx) in the presence of a catalyst, converting them into harmless nitrogen and water vapor. This reaction significantly reduces the emissions of NOx, ensuring the engine meets environmental regulations.

The dosing pump’s role extends beyond mere fluid delivery. It must operate with high precision to maintain the correct DEF-to-exhaust ratio. Any deviation can lead to inefficient NOx reduction or unnecessary DEF consumption. Therefore, the dosing pump works in concert with various sensors and control modules to monitor and adjust the DEF injection based on real-time data from the engine’s operating conditions.

Conclusion

In summary, the Cummins 5505779 Dosing Pump is a key player in the aftertreatment device, ensuring that the SCR system functions optimally to reduce emissions and comply with environmental standards. Its precise operation, robust design, and compatibility with various Cummins engines make it an essential component for maintaining high performance and reliability in commercial trucks.