The Cummins QSB3.9 is an extremely versatile 4-cylinder diesel engine. Due to its compact design, powerful performance (typically ranging from 80-130 HP), and advanced high-pressure common rail (HPCR) technology, it is widely used in various fields due to its excellent quality.
| General Information | Technical Specification |
| Model: QSB3.9 diesel engine | Certification: Euro IV |
| Type: 4 Cylinders in Line | Aspiration: Turbocharged & Charge Air Cooled |
| Displacement: 3.26 L | Fuel System: B osch Direct Injection/HPCR, SCR, EGR, DOC |
| Bore * Stroke: 95 * 95 | Compression Radio: 16.5:1 |
| Net Weight (with flywheel & alternator): 214 Kg | Starting System: Electrical Starting Motor 24V |
| Overall Dimension: 606mm*641mm*632mm | Starting Temp (with/without auxiliary system): -10ºC/-25ºC |
| Manufacture Plant: DCEC | Engine Cooling Fluid Volume: 11.1 L |
| Performance Data | Cooling Method: Water Cooled |
| Rated Power/Speed: 75kW/100HP | Rated Power: 60 kW (80HP); Rated speed: 2200 rpm |
| Rated Speed: 2200 rpm | Packing Details: Dimension: 800 * 700 * 800 mm, G.W: 300 KG |
| Max Torque/Speed: 1898 N.m@1400 rpm | |
| Max. No-load Governed Speed: 3600 rpm | |
| Idle-Speed: 750 rpm | |
| Min. Fuel Consumption: 205g/Kw.h | |
| Max Continuous Running Altitude: 2000 m |
Key Features & Technical Advantages
Advanced Fuel System: Equipped with a High-Pressure Common Rail (HPCR) system, the QSB3.9 ensures cleaner combustion, rapid throttle response, and optimized fuel economy across all RPM ranges.
Heavy-Duty Durability: Built with a reinforced engine block and high-strength components, this engine is designed to withstand continuous heavy loads in extreme conditions, significantly extending the service life and time between overhauls.
Superior Cold Start Capability: Optimized for reliability in various climates, the QSB3.9 offers excellent cold-starting performance, ensuring your machinery stays productive regardless of the weather.
Low Operating Noise: Advanced vibration-damping technology and a refined combustion process provide a quieter operation, improving operator comfort and meeting strict environmental standards.
Compact Design: The high power-to-weight ratio allows for easier integration into a wide variety of equipment, including excavators, forklifts, road rollers, and compressors.
Typical Applications
Construction Machinery:Excavators (e.g., models from Hyundai, LiuGong, XCMG, etc.)，Road rollers and graders，Mini loaders，Crane and hoist，Pile drivers and drilling rigs
Agricultural Equipment:
Tractors (medium horsepower range), combine harvesters, sprayers and irrigation pumping stations, forestry machinery (such as logging machines and wood chippers).
Industrial Power: Stationary pumps, air compressors, and material handling units.
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