4940171
Injector
Cummins®

Introduction

The Cummins 4940171 Fuel Injector is a critical component for commercial trucks powered by Cummins engines. This part ensures efficient fuel delivery, which is essential for maintaining engine performance, fuel efficiency, and reliability ¹.

Basic Concepts of Fuel Injectors

Fuel injectors in internal combustion engines atomize fuel into a fine mist that mixes with air before ignition. This process is electronically controlled to ensure precise timing and quantity of fuel delivery, which is vital for efficient combustion, reduced emissions, and optimal engine performance ².

Purpose of the Cummins 4940171 Fuel Injector

This Cummins part is designed to deliver fuel into the engine’s combustion chamber efficiently. By controlling the amount and timing of fuel injection, it enhances engine performance, improves fuel efficiency, and reduces emissions. It is engineered to meet the demands of heavy-duty applications ³.

Key Features

The 4940171 Fuel Injector features a robust design and high-quality materials, contributing to its durability and performance. It includes advanced features such as precise fuel metering and electronic control for optimal fuel delivery. The design also allows for easy installation and maintenance, making it suitable for commercial truck applications.

Benefits

This part offers improved fuel efficiency through precise fuel delivery, enhanced engine performance due to optimal combustion, and increased reliability under demanding conditions. Its design contributes to reduced emissions, aligning with environmental regulations. Additionally, its durability ensures long-term operation without frequent replacements.

Installation Process

Installing the 4940171 Fuel Injector requires careful attention to detail and the use of appropriate tools. The process involves removing the old injector, cleaning the injector seat, and installing the new injector with the correct torque specifications. Following manufacturer guidelines ensures proper installation and function. Using clean tools and working in a clean environment is recommended to prevent contamination.

Troubleshooting Common Issues

Common issues with the 4940171 Fuel Injector may include poor fuel atomization, leaks, or misfires. Troubleshooting steps involve checking the injector for physical damage, ensuring proper installation, and verifying the electronic control system’s functionality. Regular maintenance and inspections can help identify and address potential issues before they lead to significant problems.

Maintenance Tips

To ensure the longevity and optimal performance of the 4940171 Fuel Injector, regular maintenance is recommended. This includes periodic inspections for signs of wear or damage, cleaning the injector and its components to prevent clogging, and ensuring the electronic control system is functioning correctly. Following the manufacturer’s maintenance schedule and guidelines will help maintain the injector’s performance and reliability.

Cummins Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a history of innovation and quality, Cummins has established a strong reputation in the commercial truck industry. The company’s commitment to excellence and customer satisfaction is reflected in its wide range of products, including the 4940171 Fuel Injector, which is designed to meet the high standards of performance and reliability expected in heavy-duty applications.

Compatibility

The 4940171 Fuel Injector is designed to fit seamlessly with several engine models, ensuring optimal performance and reliability. This part is engineered to meet the stringent demands of heavy-duty applications, providing precise fuel delivery essential for the engines’ efficient operation.

QSL8.9 CM2150 L141

The Cummins QSL8.9 CM2150 L141 engine benefits from the 4940171 fuel injector, which is specifically tailored to deliver the required fuel under various operating conditions. This engine, known for its robust performance, relies on the injector’s precision to maintain power and efficiency.

QSL9 CM850 (CM2850)

Similarly, the QSL9 CM850 (CM2850) engine is compatible with the 4940171 fuel injector. This engine model, which is part of the Cummins QSL series, is designed for demanding applications, and the injector ensures that the engine operates at peak performance by providing consistent and accurate fuel metering.

By integrating the 4940171 fuel injector into these engines, users can expect enhanced fuel efficiency, reduced emissions, and improved overall engine performance. This compatibility underscores Cummins’ commitment to providing high-quality components that enhance the reliability and efficiency of their engines.

Role of 4940171 Fuel Injector in Engine Systems

The 4940171 Fuel Injector is integral to the efficient operation of engine systems by ensuring precise fuel delivery. This component works in conjunction with several other parts to optimize engine performance.

Integration with the Fuel System

The Fuel Injector interfaces directly with the fuel rail, which distributes pressurized fuel to each injector. It is controlled by the Engine Control Unit (ECU), which monitors various sensors to determine the optimal fuel delivery rate. The injector sprays atomized fuel into the intake port or directly into the combustion chamber, depending on the engine design.

Interaction with the Air Intake System

For engines utilizing port fuel injection, the 4940171 Fuel Injector sprays fuel into the intake port, where it mixes with incoming air before entering the combustion chamber. In direct injection systems, the injector sprays fuel directly into the chamber, allowing for more precise control over the air-fuel mixture.

Coordination with Ignition System

The timing of fuel injection is synchronized with the ignition system. The ECU sends signals to the injectors and ignition coils simultaneously, ensuring that fuel is present in the combustion chamber when the spark plug fires. This coordination is essential for efficient combustion and optimal engine performance.

Influence on Exhaust System

Proper fuel injection directly impacts the composition of exhaust gases. Efficient combustion results in lower emissions and reduced strain on the catalytic converter. The 4940171 Fuel Injector’s precise fuel delivery helps maintain the desired air-fuel ratio, contributing to cleaner exhaust output.

Effect on Engine Performance

The 4940171 Fuel Injector plays a significant role in overall engine performance. By delivering the correct amount of fuel at the right time, it ensures smooth operation, improved fuel efficiency, and enhanced power output. Consistent and accurate fuel delivery is key to maintaining engine responsiveness and durability.

Conclusion

The Cummins 4940171 Fuel Injector is a vital component for the efficient operation of Cummins engines in commercial trucks. Its precise fuel delivery enhances engine performance, improves fuel efficiency, and reduces emissions. Regular maintenance and proper installation are essential to ensure its longevity and reliability.