2872361
Speed Sensor
Cummins®

Introduction

The Cummins 2872361 Speed Sensor is a component designed to monitor and report the rotational speed of specific parts within a commercial truck. This sensor plays a role in ensuring the truck operates efficiently and safely by providing accurate speed data to the vehicle’s electronic systems. Its significance lies in its ability to enhance the performance and reliability of commercial trucks, contributing to better fuel efficiency and overall vehicle management ¹.

Basic Concepts of Speed Sensors

Speed sensors are devices that measure the rotational speed of a component, such as wheels, engines, or transmissions, and convert this mechanical motion into an electrical signal. These sensors operate using various technologies, including magnetic, optical, and Hall effect principles. In automotive systems, speed sensors are integral to functions such as anti-lock braking systems (ABS), traction control, and engine management systems, providing data that allows these systems to operate correctly ².

Purpose of the Cummins 2872361 Speed Sensor

The Cummins 2872361 Speed Sensor is specifically designed to monitor the rotational speed of the vehicle’s components, such as the wheels or transmission. It plays a role in the truck’s operation by providing the engine control unit (ECU) and transmission with precise speed data. This information is used to optimize fuel injection timing, gear shifting, and other functions that contribute to the truck’s performance and efficiency. The sensor’s integration with these systems ensures that the truck operates smoothly and efficiently under various driving conditions ³.

Key Features

The Cummins 2872361 Speed Sensor is characterized by its robust design and construction, which includes high-quality materials that ensure durability and reliability in demanding commercial truck environments. The sensor incorporates advanced technological features that enhance its accuracy and performance, such as precise signal processing and resistance to environmental factors like moisture and temperature variations.

Benefits

The Cummins 2872361 Speed Sensor offers several advantages, including improved fuel efficiency through optimized engine and transmission operations. It also contributes to enhanced vehicle performance by ensuring that the ECU and transmission receive accurate speed data, allowing for precise control of various vehicle functions. Additionally, the sensor plays a role in increasing safety by providing reliable speed information that is crucial for the operation of safety systems like ABS and traction control ⁴.

Installation and Integration

Proper installation of the Cummins 2872361 Speed Sensor is crucial for its effective operation. It should be installed according to the manufacturer’s guidelines, ensuring it is securely mounted and correctly aligned with the component it is monitoring. Integration with the truck’s electronic systems requires careful attention to wiring and connections to ensure accurate data transmission. Any prerequisites, such as system calibration or software updates, should be performed to ensure the sensor operates within the vehicle’s electronic ecosystem.

Troubleshooting and Maintenance

Common issues with the Cummins 2872361 Speed Sensor may include inaccurate readings or complete sensor failure, often due to environmental factors or physical damage. Diagnostic procedures involve checking the sensor’s output signal against expected values and inspecting the sensor and its connections for damage or corrosion. Regular maintenance, such as cleaning the sensor and its mounting area and ensuring connections are secure, can help prevent issues and ensure the sensor’s longevity and optimal performance.

Cummins 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 product range includes a variety of engines, powertrain solutions, and aftermarket parts, all designed to meet the demanding requirements of commercial transportation. Cummins’ commitment to innovation and quality has made it a trusted name among fleet operators and truck manufacturers worldwide.

Cummins Speed Sensor 2872361 Compatibility

The Cummins Speed Sensor 2872361 is designed to be compatible with a range of Cummins engines, ensuring precise engine performance monitoring and control. This sensor is integral to the engine’s operation, providing critical data for the engine control unit (ECU).

Compatible Engines

• 4B3.9
• 6B5.9
• 6C8.3
• B4.5
• QSB3.9 30 CM550
• QSB5.9 30 CM550
• QSB5.9 44 CM550

Grouping of Compatible Engines

The Cummins Speed Sensor 2872361 is engineered to fit seamlessly within the following groups of engines:

• QSB Series Engines:

  • QSB3.9 30 CM550
  • QSB5.9 30 CM550
  • QSB5.9 44 CM550

• Other Cummins Engines:

  • 4B3.9
  • 6B5.9
  • 6C8.3
  • B4.5

This sensor ensures that the engine’s ECU receives accurate speed data, which is essential for maintaining optimal engine performance and efficiency.

Role of Part 2872361 Speed Sensor in Engine Systems

Part 2872361, the Speed Sensor, is integral to the operation of various engine systems by providing precise data on rotational speed. This sensor works in conjunction with the signal generating device to ensure accurate and timely data transmission.

Integration with Signal Generating Device

The Speed Sensor interfaces directly with the signal generating device, which is responsible for producing electrical signals based on the rotational speed of engine components. The sensor captures these signals and converts them into readable data for the engine control unit (ECU). This data is essential for the ECU to make real-time adjustments to fuel injection, ignition timing, and other critical parameters.

Functionality in Engine Systems

1. Fuel Injection System: The Speed Sensor provides the ECU with the necessary data to optimize fuel delivery. By monitoring the speed of the crankshaft or camshaft, the sensor ensures that fuel is injected at the precise moment for maximum efficiency and performance.

2. Ignition System: Accurate speed data from the sensor allows the ignition system to time the spark delivery perfectly. This synchronization is vital for combustion efficiency and overall engine performance.

3. Transmission System: In vehicles with automatic transmissions, the Speed Sensor plays a role in shift timing. By monitoring the engine and input/output shaft speeds, the sensor helps the transmission control unit (TCU) determine the optimal moment for gear changes, enhancing both performance and fuel economy.

4. Anti-lock Braking System (ABS): The Speed Sensor is also utilized in the ABS to monitor wheel speed. This data helps the ABS control module to prevent wheel lock-up during braking, thereby improving vehicle stability and safety.

5. Traction Control System (TCS): Similar to ABS, the Speed Sensor provides wheel speed data to the TCS. This information allows the system to apply brakes to individual wheels or reduce engine power to maintain traction during acceleration.

Conclusion

In summary, the Cummins 2872361 Speed Sensor is a fundamental component that enhances the performance, efficiency, and safety of modern engine systems through its precise speed data collection and integration with various engine and vehicle control systems.