4359309
Nitrogen Oxide Sensor
Cummins®

The Cummins 4359309 Nitrogen Oxide Sensor is a component designed to monitor and control nitrogen oxide (NOx) emissions in heavy-duty trucks. Its purpose is to ensure that diesel engines operate within regulatory limits for emissions, contributing to environmental protection and compliance with emissions standards.

Basic Concepts of Nitrogen Oxide Sensors

Nitrogen oxides (NOx) are a group of gases formed during the combustion process in diesel engines. They are a significant contributor to air pollution and can have adverse effects on both the environment and human health. Nitrogen oxide sensors play a role in emissions control systems by measuring the concentration of NOx in the exhaust. This measurement allows the engine control unit (ECU) to adjust the combustion process in real-time, optimizing it to reduce NOx emissions. The technology behind these sensors typically involves electrochemical cells or infrared spectroscopy, which detect NOx levels accurately and reliably ¹.

Purpose of the Cummins 4359309 Nitrogen Oxide Sensor

This Cummins part is integral to the emissions control system of a truck. It provides real-time data on NOx levels in the exhaust, enabling the ECU to make precise adjustments to the fuel injection and exhaust gas recirculation (EGR) systems. This function helps in maintaining optimal engine performance while ensuring that emissions remain within regulatory limits.

Key Features

This part is characterized by its robust design and high-quality construction materials, which ensure durability and reliability in the demanding environment of a diesel engine. It incorporates advanced technology that enhances its accuracy and responsiveness, making it a reliable component for emissions monitoring and control.

Benefits

Using this Cummins part offers several benefits. It contributes to improved emissions control by providing accurate NOx measurements, which allows for more effective adjustments to the engine’s operation. This results in enhanced engine performance and efficiency. Additionally, it aids in compliance with environmental regulations, helping truck operators avoid penalties and maintain a positive environmental impact.

Installation and Integration

Proper installation of this part involves careful placement within the exhaust system to ensure accurate readings. It is important to follow manufacturer guidelines for installation to avoid issues such as incorrect readings or sensor damage. Integration with the truck’s ECU requires ensuring that the sensor is correctly connected and calibrated to work seamlessly with the emissions control system.

Troubleshooting and Maintenance

Common issues with this part may include inaccurate readings or sensor failure. Troubleshooting involves checking the sensor’s connections, ensuring it is properly installed, and verifying that it is calibrated correctly. Regular maintenance, such as cleaning the sensor and inspecting it for physical damage, can help ensure its effective operation over time.

Regulatory Compliance

This part plays a role in helping trucks comply with emissions regulations by providing accurate NOx measurements. This data is crucial for meeting standards set by environmental agencies, which mandate specific limits on NOx emissions from diesel engines. Regular testing and maintenance of the sensor are important for ensuring ongoing compliance.

Cummins Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes a wide range of power solutions, including diesel engines and related technologies. With a history of innovation and commitment to quality, Cummins has played a significant role in the development of emissions control technologies, including nitrogen oxide sensors, to meet the evolving needs of the transportation industry and environmental regulations.

Nitrogen Oxide Sensor Compatibility with Cummins Engines

The Nitrogen Oxide (NOx) Sensor part number 4359309, manufactured by Cummins, is a critical component in modern engine systems designed to monitor and regulate emissions. This sensor is compatible with a variety of Cummins engines, ensuring adherence to stringent environmental regulations. Below is a detailed description of the engines with which this NOx sensor is compatible.

B6.7 Series Engines

The B6.7 series engines, including the B6.7 CM2670 B153B, are equipped with the NOx sensor to maintain optimal emission levels. These engines are known for their robust performance and reliability, making them suitable for heavy-duty applications.

D4.0 Series Engines

The D4.0 series engines, such as the D4.0 CM2620 D103B, also utilize the NOx sensor. These engines are designed for medium-duty applications, providing a balance between power and efficiency.

F3.8 and F4.5 Series Engines

The F3.8 CM2620 F137B and F4.5 CM2620 F139B engines are part of the F series, which are engineered for flexibility and performance in various applications. The NOx sensor is integral to these engines, ensuring they meet emission standards.

ISBE4 and ISL9 Series Engines

The ISBE4 CM850 and ISL9 CM2150 SN engines are high-performance engines used in demanding environments. The NOx sensor is essential for these engines to maintain compliance with environmental regulations while delivering exceptional power.

ISZ13 Series Engine

The ISZ13 CM2150 Z105 engine is another high-performance engine that benefits from the NOx sensor. This engine is designed for applications requiring both power and efficiency, and the NOx sensor plays a crucial role in its emission control system.

L9, X11, X12, X13, and Z14 Series Engines

The L9 CM2670 L128B, X11 CM2670 X126B, X12 CM2670 X121B, X13 CM2670 X122B, and Z14 CM2670 Z103B engines are part of the X and Z series, which are known for their versatility and reliability. The NOx sensor is a key component in these engines, ensuring they operate within the required emission standards.

Each of these engines, despite their different specifications and applications, relies on the NOx sensor to monitor and regulate nitrogen oxide emissions effectively. This ensures that the engines not only perform optimally but also contribute to environmental protection by adhering to emission regulations.

Role of Part 4359309 Nitrogen Oxide Sensor in Aftertreatment Systems

The 4359309 Nitrogen Oxide (NOx) Sensor is integral to the operation of aftertreatment systems, particularly in diesel engines where emissions control is paramount. This sensor is positioned upstream of the aftertreatment device, such as a Selective Catalytic Reduction (SCR) system or a Diesel Particulate Filter (DPF), to monitor the levels of NOx in the exhaust gases.

By providing real-time data on NOx concentrations, the sensor enables the Engine Control Unit (ECU) to adjust the injection timing, fuel quantity, and the amount of reductant (such as Diesel Exhaust Fluid - DEF) injected into the exhaust stream. This ensures that the aftertreatment device operates within optimal parameters, effectively reducing NOx emissions to meet regulatory standards.

In the context of the aftertreatment system, the sensor’s feedback loop is essential for maintaining the efficiency of the SCR or DPF. It helps prevent over-reduction, which can lead to ammonia slip, and under-reduction, which results in higher NOx emissions. The sensor’s accurate readings are the foundation for the ECU’s decision-making process regarding the aftertreatment strategy, ensuring that the system remains compliant with environmental regulations while maintaining engine performance ².

Conclusion

The Cummins 4359309 Nitrogen Oxide Sensor is a vital component in the emissions control systems of heavy-duty trucks. It ensures that diesel engines operate within regulatory limits for emissions, contributing to environmental protection and compliance with emissions standards. By providing accurate NOx measurements, this sensor enables the ECU to make precise adjustments to the engine’s operation, enhancing performance and efficiency while maintaining compliance with environmental regulations.