China Cummins ISM11 Truck Diesel Engine Parts Doser Pump 5273338 | Tonkee®

The doser pump, part number 5273338, is a critical component of the Cummins ISM11 diesel engine's aftertreatment system.

This system is designed to reduce harmful emissions, including nitrogen oxides (NOx), and comply with stringent emission regulations such as EPA and Euro standards.

Functionality:
The primary function of the doser pump is to deliver a precise amount of Diesel Exhaust Fluid (DEF) into the exhaust stream of the engine. DEF is a urea-based solution that reacts with NOx emissions in the exhaust gases, converting them into harmless nitrogen and water vapor. This process is known as Selective Catalytic Reduction (SCR), and it is an essential part of modern diesel engines' emissions control strategy.

Specifications:
The Cummins ISM11 doser pump with part number 5273338 is engineered to meet strict performance and durability standards. Here are some key specifications:

Flow Rate: The doser pump is designed to provide a specific flow rate of DEF into the exhaust system. This rate is carefully calibrated to ensure effective NOx reduction while optimizing fuel efficiency.

Materials: The pump is constructed from high-quality materials that are resistant to DEF and other chemicals, ensuring longevity and reliability in the harsh operating conditions of a heavy-duty truck.

Mounting: It is typically mounted in close proximity to the SCR catalyst and is integrated into the aftertreatment system of the Cummins ISM11 engine.

Control: The doser pump is electronically controlled to precisely meter the DEF injection. This control is critical to maintaining emissions compliance and achieving optimal engine performance.

Compatibility: Part number 5273338 is specifically designed for the Cummins ISM11 engine, ensuring a perfect fit and seamless integration with the engine's emission control system.

Maintenance and Troubleshooting:
Proper maintenance of the doser pump is essential to ensure its continued reliability and performance. Regular inspections, DEF quality checks, and adherence to manufacturer-recommended service intervals are crucial. If issues arise, diagnostics should be conducted using compatible Cummins diagnostic tools to identify and address any malfunctions promptly.

Environmental Impact:
The doser pump, by enabling the SCR process, significantly reduces the emission of NOx, a harmful air pollutant that contributes to smog formation and respiratory problems. This technology helps the Cummins ISM11 engine meet stringent emission regulations, making it more environmentally friendly and compliant with global emissions standards.

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