4951990
Electronic Control Module Wiring Harness
Cummins®

Introduction

The Cummins 4951990 Temperature Sensor is a specialized component designed for use in commercial trucks. Its purpose is to monitor the temperature within the engine system, providing vital data that contributes to the overall performance and longevity of the truck. This sensor plays a role in ensuring that the engine operates under optimal conditions, thereby enhancing efficiency and reliability.

Basic Concepts of Temperature Sensors

Temperature sensors are devices that measure the temperature of their surroundings and convert this measurement into an electrical signal. They are integral to various automotive systems, where they help regulate engine performance, cabin comfort, and other functions. In automotive applications, temperature sensors provide real-time data to the engine control unit (ECU), allowing for precise adjustments to fuel injection, ignition timing, and other parameters ¹.

Role of the 4951990 Temperature Sensor in Truck Operation

The Cummins 4951990 Temperature Sensor is specifically designed to monitor the temperature within a truck’s engine system. By providing accurate temperature readings, it enables the ECU to make informed decisions regarding fuel delivery and ignition timing. This ensures that the engine operates efficiently and within safe temperature limits, which is particularly important in heavy-duty applications where engines are subjected to high loads and varying operating conditions.

Key Features of the 4951990 Temperature Sensor

The Cummins 4951990 Temperature Sensor is engineered with a robust design that includes high-quality construction materials. Its technological specifications are tailored to ensure accuracy and reliability in demanding environments. The sensor is built to withstand the high temperatures and vibrations typical of commercial truck engines, making it a durable and effective component for long-term use.

Benefits of Using the 4951990 Temperature Sensor

Incorporating the Cummins 4951990 Temperature Sensor into a truck’s engine system offers several advantages. It contributes to improved engine performance by ensuring that operating conditions remain within optimal ranges. This can lead to enhanced fuel efficiency and reduced emissions. Additionally, the sensor plays a role in maintaining engine safety by preventing overheating, which can cause severe damage and downtime.

Installation and Integration

Installing the Cummins 4951990 Temperature Sensor involves placing it in a strategic location within the engine system where it can accurately measure temperature. Integration with the truck’s engine management system requires connecting the sensor to the ECU, allowing for real-time data transmission. Proper installation ensures that the sensor functions correctly and provides reliable temperature readings.

Troubleshooting and Maintenance

Common issues with temperature sensors may include inaccurate readings or sensor failure. Diagnostic procedures involve checking the sensor’s connections, testing its output signal, and ensuring it is free from contaminants. Regular maintenance, such as cleaning the sensor and inspecting its wiring, can help ensure longevity and accurate readings. Promptly addressing any issues can prevent more significant problems and maintain the sensor’s effectiveness.

Cummins: A Brief Overview

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 a strong reputation in the commercial truck industry for producing reliable and high-performance engines and components. The company’s extensive product range includes a variety of sensors and other critical components that contribute to the efficiency and safety of commercial vehicles.

Temperature Sensor 4951990 Compatibility with Cummins Engines

The Temperature Sensor part number 4951990, manufactured by Cummins, is designed to integrate seamlessly with several of their engine models. This sensor plays a role in monitoring and maintaining optimal engine temperature, ensuring efficient operation and longevity of the engine.

QSK50 Engine

In the QSK50 engine, the Temperature Sensor 4951990 is strategically placed to provide accurate readings of the engine’s temperature. This placement is important for the engine control unit (ECU) to make real-time adjustments, ensuring the engine operates within its optimal temperature range. The sensor’s precision helps in preventing overheating and maintaining fuel efficiency.

CM2150 and MCRS Engines

For the CM2150 and MCRS engines, the Temperature Sensor 4951990 is equally vital. These engines, often used in heavy-duty applications, require reliable temperature monitoring to handle the demanding conditions they face. The sensor’s placement in these engines is designed to capture temperature data from key areas, allowing the ECU to manage engine performance effectively. This ensures that the engines can sustain high performance while minimizing the risk of thermal damage.

Integration and Functionality

The integration of the Temperature Sensor 4951990 across these engines is a testament to Cummins’ commitment to quality and reliability. The sensor’s design ensures it can withstand the harsh environments these engines operate in, providing consistent and accurate temperature readings. This compatibility across different engine models highlights the versatility and robustness of the sensor, making it a component for maintaining engine health and performance.

Role of Part 4951990 Temperature Sensor in Engine Systems

The part 4951990 temperature sensor is integral to the operation of various engine systems, ensuring optimal performance and efficiency. When integrated into the engine harness, this sensor provides real-time temperature data that is essential for the proper functioning of the engine.

The sensor is connected to the electronic control module (ECM) via dedicated wiring. This connection allows the ECM to receive accurate temperature readings from the sensor. The ECM uses this data to make informed decisions regarding fuel injection timing, ignition timing, and other critical parameters.

Moreover, the temperature sensor’s data helps in maintaining the engine’s operating temperature within a specified range. This is achieved by modulating the operation of components such as the thermostat and the cooling system. The sensor’s feedback loop ensures that the engine neither overheats nor operates at inefficiently low temperatures.

Conclusion

The Cummins 4951990 Temperature Sensor is a vital component in the engine systems of commercial trucks. Its accurate temperature readings enable the ECU to optimize engine performance, enhance fuel efficiency, and ensure engine safety. The sensor’s robust design and compatibility with various Cummins engines make it a reliable and essential part for maintaining the efficiency and longevity of commercial truck engines.