4921517
Pressure Sensor
Cummins®

Introduction

The Cummins 4921517 Pressure Sensor is designed to monitor and report pressure levels within a commercial truck’s engine system. It provides accurate pressure readings that the engine management system uses to optimize performance, efficiency, and emissions control. This sensor is integral to maintaining the operational integrity of modern diesel engines, ensuring they run smoothly under various conditions.

Basic Concepts of Pressure Sensors

Pressure sensors measure the force exerted by a fluid (liquid or gas) per unit area within a system. They convert physical pressure into an electrical signal, which electronic systems can interpret. In automotive applications, pressure sensors are used in various systems, including fuel injection, turbocharging, and engine management, to ensure optimal performance and efficiency ¹.

Functionality of the 4921517 Pressure Sensor

The Cummins 4921517 Pressure Sensor provides real-time pressure data to the engine management system. This data is used to make adjustments to fuel injection timing, turbocharging, and other parameters that affect engine performance. The sensor is integrated into the engine’s subsystems, allowing for precise control and monitoring of pressure levels, which contributes to the overall efficiency and reliability of the engine ².

Key Features

The Cummins 4921517 Pressure Sensor is characterized by its robust design and the use of high-quality materials that ensure durability and accuracy in harsh operating environments. It incorporates advanced technological features such as a high-sensitivity diaphragm for precise pressure measurement and a durable housing that protects against physical damage and environmental factors. These features contribute to the sensor’s reliability and longevity in commercial truck applications ³.

Benefits

The benefits provided by the Cummins 4921517 Pressure Sensor include improved engine efficiency through precise pressure monitoring, enhanced diagnostic capabilities that allow for early detection of potential issues, and contributions to overall vehicle performance and reliability. By ensuring that the engine operates within optimal pressure ranges, this sensor helps to maximize fuel efficiency, reduce emissions, and extend the lifespan of the engine and related components ⁴.

Troubleshooting and Maintenance

Common issues that may arise with the Cummins 4921517 Pressure Sensor include inaccurate readings due to sensor fouling or damage, and electrical faults that affect signal transmission. Diagnostic steps for identifying problems involve checking the sensor’s output against known good values, inspecting the sensor and its connections for physical damage, and testing the electrical circuit for continuity and proper voltage. Maintenance practices to ensure optimal performance and longevity include regular inspection of the sensor and its connections, cleaning the sensor as necessary to remove any contaminants, and replacing the sensor if it shows signs of wear or failure.

About Cummins

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a history spanning over a century, Cummins has established itself as a leader in diesel engine manufacturing, known for its commitment to innovation, quality, and customer satisfaction. The company’s expertise in engine technology and its dedication to advancing the automotive industry are evident in its wide range of products, including the Cummins 4921517 Pressure Sensor.

Cummins Pressure Sensor 4921517 Compatibility

The Cummins Pressure Sensor part number 4921517 is designed to be compatible with a wide range of Cummins engines. This sensor plays a role in monitoring and maintaining the pressure levels within the engine’s systems, ensuring optimal performance and efficiency.

Compatible Engines

B Series Engines

• B4.5 CM2350 B129B
• B5.9 CM2670 B166C
• B5.9 GAS PLUS CM556
• B6.7 CM2350 B135B
• B6.7 CM2670 B153B
• B6.7 G CMOH6.0 B125

ISB/ISD Series Engines

• ISB/ISD4.5 CM2150 B119
• ISB/ISD6.7 CM2150 SN
• ISB3.9 CM2220 B107
• ISB4.5 CM2350 B104
• ISB5.9 CM2880 B127
• ISB5.9G CM2180

ISBE Series Engines

• ISBE CM2150
• ISBE4 CM850

ISC Series Engines

• ISC CM2150
• ISC CM850
• ISC8.3 CM2250

ISD Series Engines

• ISD4.5 CM2220 D108

ISG Series Engines

• ISG11 CM2880 G108
• ISG12 CM2880 G107
• ISG12 G CMOH6.0 G111

ISL Series Engines

• ISL CM2150
• ISL9 CM2150 SN
• ISL9 CM2250

This pressure sensor is engineered to fit seamlessly with the listed engines, providing reliable and accurate pressure readings to help maintain the engine’s performance.

Role of Part 4921517 Pressure Sensor in Engine Systems

The 4921517 Pressure Sensor is an integral component in various engine systems, ensuring optimal performance and efficiency. It is strategically positioned to monitor and relay precise pressure readings to the Engine Control Module (ECM).

Oil Pressure Monitoring

In the oil pressure system, the 4921517 Pressure Sensor is installed within the oil cooler housing. It measures the pressure of the engine oil as it circulates through the oil cooler. This data is vital for the ECM to adjust the oil pump’s operation, ensuring that the engine receives the appropriate lubrication under varying conditions. The sensor’s accurate readings help maintain the engine’s longevity by preventing both over and under-lubrication.

Exhaust Gas Recirculation (EGR) System

Within the EGR system, the 4921517 Pressure Sensor is placed after the EGR cooler. It monitors the pressure of the recirculated exhaust gases, providing the ECM with essential data to optimize the EGR valve’s operation. This ensures that the correct amount of exhaust gas is recirculated, reducing nitrogen oxides (NOx) emissions and improving fuel efficiency.

Engine Control Module (ECM) Interaction

The 4921517 Pressure Sensor continuously sends pressure data to the ECM. The ECM uses this information to make real-time adjustments to various engine parameters. For instance, if the sensor detects a drop in oil pressure, the ECM can increase the oil pump’s output to maintain adequate lubrication. Similarly, in the EGR system, if the sensor indicates high pressure, the ECM may adjust the EGR valve to reduce the flow of exhaust gases.

Gauge and Module Integration

The pressure readings from the 4921517 Pressure Sensor are also displayed on the gauge within the engine’s instrumentation. This allows for immediate visual feedback to the operator, enabling quick responses to any anomalies. Additionally, the sensor’s data is integrated into various engine modules, enhancing the overall diagnostic capabilities of the engine system.

Conclusion

The Cummins 4921517 Pressure Sensor plays a significant role in maintaining the efficiency and reliability of engine systems by providing accurate pressure readings that enable the ECM to make necessary adjustments. Its robust design, advanced features, and compatibility with a wide range of Cummins engines make it a vital component in ensuring optimal engine performance and longevity.