DR7230RX
Engine QSL 8.9 T4I C 300@210
Cummins®

The Cummins QSL 8.9 T4I C 300@210 engine, also known as the DR7230RX, is a robust power unit designed for commercial truck applications. It is part of Cummins’ lineup of diesel engines that deliver reliable performance and efficiency. This engine is significant in the industry due to its balance of power, fuel efficiency, and compliance with stringent emissions regulations, making it a preferred choice for commercial truck operators ¹.

Engine Specifications

This Cummins part features a displacement of 8.9 liters, producing 300 horsepower at 2,100 RPM. It delivers substantial torque, ensuring strong performance for heavy-duty applications. The engine’s design incorporates advanced technologies to enhance efficiency and reduce emissions, aligning with industry standards ².

Design and Architecture

The Engine QSL 8.9 T4I C 300@210 employs an inline-six configuration, which provides a smooth and balanced operation. It is turbocharged and intercooled, which significantly boosts its power output and efficiency. The T4I (Tier 4 Interim) emissions standard compliance ensures that the engine meets environmental regulations, reducing its environmental impact while maintaining performance ³.

Fuel System

The fuel system of this part utilizes a high-pressure common rail injection system. This system allows for precise fuel delivery, enhancing both efficiency and performance. The common rail design ensures that fuel is delivered at optimal pressure and timing, contributing to better combustion and reduced emissions ⁴.

Turbocharging and Intercooling

Turbocharging and intercooling play significant roles in the engine’s performance. The turbocharger compresses the intake air, allowing more oxygen to enter the combustion chamber, which increases power output. The intercooler cools the compressed air before it enters the engine, further improving efficiency and power. These processes contribute to enhanced fuel efficiency and lower emissions ⁵.

Emission Control Technologies

The engine incorporates several emission control technologies to meet regulatory standards. Exhaust Gas Recirculation (EGR) reduces nitrogen oxides by recirculating a portion of the exhaust gas back into the intake. The Diesel Particulate Filter (DPF) captures particulate matter from the exhaust. Selective Catalytic Reduction (SCR) uses a urea-based solution to convert nitrogen oxides into nitrogen and water, further reducing emissions ⁶.

Performance Characteristics

The DR7230RX offers a robust torque curve and reliable power delivery, making it suitable for a variety of commercial truck applications. Its performance characteristics ensure that it can handle demanding tasks while maintaining fuel efficiency and compliance with emissions standards ⁷.

Maintenance and Service Intervals

Regular maintenance is crucial for the longevity and performance of this Cummins part. Recommended procedures include routine oil changes, filter replacements, and inspection schedules. Adhering to these service intervals helps ensure the engine operates efficiently and reliably ⁸.

Troubleshooting Common Issues

Operators may encounter various issues with the engine, such as loss of power, unusual noises, or emission-related problems. Identifying the root cause of these issues involves systematic diagnosis, often starting with checking fluid levels, inspecting filters, and ensuring all components are functioning correctly. Regular maintenance can prevent many common problems ⁹.

Benefits for Commercial Truck Operators

The DR7230RX offers several benefits to commercial truck operators. Its reliability ensures minimal downtime, while its fuel efficiency reduces operating costs. Compliance with emissions regulations helps operators avoid fines and maintain a clean environmental record. These factors contribute to the engine’s appeal in the commercial truck market ¹⁰.

Cummins Corporation Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes a wide range of power solutions. Founded in 1919, the company has a long history of innovation and sustainability in the diesel engine industry. Cummins is committed to advancing technology and reducing the environmental impact of its products, ensuring they meet the needs of today’s demanding applications ¹¹.

Conclusion

The Cummins QSL 8.9 T4I C 300@210 engine, or DR7230RX, stands out in the commercial truck market for its robust performance, fuel efficiency, and compliance with emissions regulations. Its advanced design and technologies ensure reliable operation and reduced environmental impact, making it a valuable asset for commercial truck operators.