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QST30-L2
Cummins
The Cummins QST30-L2 is a premium 30.5-liter, V12 heavy-duty diesel engine engineered to deliver robust, efficient, and reliable power for continuous-duty industrial and propulsion applications. As a member of the proven Quantum series, this engine combines high power density with legendary durability, making it the ideal power source for demanding operations where uptime, performance, and a low total cost of ownership are critical.
| Feature | Specification |
|---|---|
| Engine Model | Cummins QST30-L2 (Quantum Series) |
| Configuration | V12, 50-degree, 4-Stroke Diesel |
| Displacement | 30.5 L (1,861 cu in) |
| Rated Power (Continuous) | ~672 kW (900 HP) (Typical for L2 variant) |
| Aspiration | Turbocharged & Aftercooled |
| Fuel System | Quantum Electronic High-Pressure Common Rail |
| Control System | Full-Authority Electronic Control (CM850 ECM) |
| Emissions Compliance | EPA Tier 2, EU Stage IIIA |
| Key Application Code | "L" Designation for Locomotive/Rail |
The QST30-L2 is engineered as a prime mover for equipment requiring continuous, high-torque power in fixed or mobile installations.
Rail & Locomotive: The primary application is for diesel-electric locomotives, railcar power packs, and shunting locomotives, providing reliable traction and auxiliary power.
Marine Propulsion: Used in workboats, tugboats, and small commercial vessels requiring robust and compact propulsion.
Industrial Power Generation: Serves as a dependable driver for large prime power and continuous-duty generator sets for mining, oil & gas, and industrial plants.
Specialized Industrial: Powers large industrial pumps, compressor stations, and other heavy continuous-duty machinery.
1. Quantum System Electronic Control & Fuel System
The engine features the advanced Quantum electronic control system, managing a high-pressure common rail fuel system. This ensures ultra-precise fuel injection timing and pressure, optimizing combustion for maximum fuel efficiency, low emissions, and stable performance across all load conditions.
2. High-Efficiency Turbocharged Air System
Utilizing high-performance turbochargers with efficient aftercooling, the system forces a dense charge of cool air into the cylinders. This design maximizes power density and combustion efficiency, providing strong low-end torque and excellent throttle response—critical for rail and marine propulsion cycles.
3. Robust Engine Architecture for Continuous Duty
Built for a long service life, the QST30-L2 features a one-piece, high-strength cast-iron V-block and heavy-duty rotating assembly. Components like forged steel crankshafts and ductile iron pistons are designed to withstand the constant high loads of 24/7 operation, ensuring exceptional durability and extended overhaul intervals.
4. Integrated System Design for Simplified Installation
The engine is designed for seamless integration into complex systems like locomotive powertrains. Its compact V12 footprint offers an excellent power-to-weight and power-to-size ratio, while comprehensive connectivity and mounting provisions simplify the installation process for OEMs.
The Cummins QST30-L2 is a premium 30.5-liter, V12 heavy-duty diesel engine engineered to deliver robust, efficient, and reliable power for continuous-duty industrial and propulsion applications. As a member of the proven Quantum series, this engine combines high power density with legendary durability, making it the ideal power source for demanding operations where uptime, performance, and a low total cost of ownership are critical.
| Feature | Specification |
|---|---|
| Engine Model | Cummins QST30-L2 (Quantum Series) |
| Configuration | V12, 50-degree, 4-Stroke Diesel |
| Displacement | 30.5 L (1,861 cu in) |
| Rated Power (Continuous) | ~672 kW (900 HP) (Typical for L2 variant) |
| Aspiration | Turbocharged & Aftercooled |
| Fuel System | Quantum Electronic High-Pressure Common Rail |
| Control System | Full-Authority Electronic Control (CM850 ECM) |
| Emissions Compliance | EPA Tier 2, EU Stage IIIA |
| Key Application Code | "L" Designation for Locomotive/Rail |
The QST30-L2 is engineered as a prime mover for equipment requiring continuous, high-torque power in fixed or mobile installations.
Rail & Locomotive: The primary application is for diesel-electric locomotives, railcar power packs, and shunting locomotives, providing reliable traction and auxiliary power.
Marine Propulsion: Used in workboats, tugboats, and small commercial vessels requiring robust and compact propulsion.
Industrial Power Generation: Serves as a dependable driver for large prime power and continuous-duty generator sets for mining, oil & gas, and industrial plants.
Specialized Industrial: Powers large industrial pumps, compressor stations, and other heavy continuous-duty machinery.
1. Quantum System Electronic Control & Fuel System
The engine features the advanced Quantum electronic control system, managing a high-pressure common rail fuel system. This ensures ultra-precise fuel injection timing and pressure, optimizing combustion for maximum fuel efficiency, low emissions, and stable performance across all load conditions.
2. High-Efficiency Turbocharged Air System
Utilizing high-performance turbochargers with efficient aftercooling, the system forces a dense charge of cool air into the cylinders. This design maximizes power density and combustion efficiency, providing strong low-end torque and excellent throttle response—critical for rail and marine propulsion cycles.
3. Robust Engine Architecture for Continuous Duty
Built for a long service life, the QST30-L2 features a one-piece, high-strength cast-iron V-block and heavy-duty rotating assembly. Components like forged steel crankshafts and ductile iron pistons are designed to withstand the constant high loads of 24/7 operation, ensuring exceptional durability and extended overhaul intervals.
4. Integrated System Design for Simplified Installation
The engine is designed for seamless integration into complex systems like locomotive powertrains. Its compact V12 footprint offers an excellent power-to-weight and power-to-size ratio, while comprehensive connectivity and mounting provisions simplify the installation process for OEMs.