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QSK78
Cummins
The Cummins QSK78 stands as a pinnacle of heavy-duty diesel engineering, designed to deliver unparalleled power and reliability in the world's most demanding sectors. As the world's first production 78-liter engine with a V18 configuration, it was developed through a strategic alliance with Komatsu to meet the needs of mega-tonnage equipment. Its robust design and advanced technology are engineered for one purpose: to maximize productivity and uptime in applications where power and durability are non-negotiable.
The QSK78's colossal power and robustness make it the prime mover for capital-intensive, heavy-duty machinery.
Mining & Quarrying: The primary application is powering the world's largest class of off-highway haul trucks, such as the Komatsu 930E, capable of carrying payloads of 290 metric tons and more. Its exceptional high-altitude performance, proven in challenging environments like the Andes, ensures consistent power without derating at altitudes up to 3,658 meters.
Power Generation (G-Drive): A cornerstone for ultra-large-scale diesel generator sets. It provides prime, standby, and continuous power (typically ranging from 2200-2500 kW for prime power), making it ideal for mission-critical facilities like data centers, large industrial plants, oil & gas operations, and major event or movie site power.
Rail & Locomotive: A powerful engine for repowering and modernizing high-horsepower locomotives, providing reliable traction power for heavy freight and industrial rail applications.
The QSK78 integrates Cummins' most advanced heavy-duty technologies to ensure efficiency, durability, and low total operating costs.
Advanced High-Pressure Fuel Systems: It utilizes either the HPI (High-Pressure Injection) or the next-generation Modular Common Rail (MCRS) system. These systems deliver extremely high injection pressures (up to 2,000 bar), ensuring ultra-fine fuel atomization for complete combustion. This results in superior fuel economy, a significant increase in "fuel burn to overhaul" life, and low emissions.
Intelligent Combustion & Air Management:
Quantum System Electronics: The high-speed Electronic Control Module (ECM) precisely manages injection timing and fuel volume, optimizing the combustion process in real-time for peak performance and efficiency.
Two-Stage Turbocharging: A system utilizing Holset turbochargers compresses intake air in two stages with intermediate cooling. This dramatically increases air density, enabling the engine to produce full-rated power at extreme altitudes and improving overall thermal efficiency.
Micro-Turbulence Combustion Chamber (MTCC): This patented technology optimizes air swirl within the cylinder across all engine speeds, leading to improved fuel burn and reduced particulate emissions.
Unmatched Durability & Simplified Maintenance:
Robust Base Engine: Features a heavy-duty, one-piece cast-iron block, a forged high-strength steel crankshaft, and Ferrous Cast Ductile Iron (FCD) pistons for exceptional strength and long life.
Intelligent Maintenance Systems: Optional systems like ELIMINATOR™ (self-cleaning oil filtration) and CENTINEL™ (continuous oil replenishment) drastically extend service intervals—oil change intervals can reach up to 4,500 hours—reducing maintenance costs and downtime.
Proven Reliability: With over 1 million hours of operational experience, its design targets an overhaul life of up to 12,000 hours, validated by field utilization rates exceeding 98% in harsh mining conditions.
The Cummins QSK78 stands as a pinnacle of heavy-duty diesel engineering, designed to deliver unparalleled power and reliability in the world's most demanding sectors. As the world's first production 78-liter engine with a V18 configuration, it was developed through a strategic alliance with Komatsu to meet the needs of mega-tonnage equipment. Its robust design and advanced technology are engineered for one purpose: to maximize productivity and uptime in applications where power and durability are non-negotiable.
The QSK78's colossal power and robustness make it the prime mover for capital-intensive, heavy-duty machinery.
Mining & Quarrying: The primary application is powering the world's largest class of off-highway haul trucks, such as the Komatsu 930E, capable of carrying payloads of 290 metric tons and more. Its exceptional high-altitude performance, proven in challenging environments like the Andes, ensures consistent power without derating at altitudes up to 3,658 meters.
Power Generation (G-Drive): A cornerstone for ultra-large-scale diesel generator sets. It provides prime, standby, and continuous power (typically ranging from 2200-2500 kW for prime power), making it ideal for mission-critical facilities like data centers, large industrial plants, oil & gas operations, and major event or movie site power.
Rail & Locomotive: A powerful engine for repowering and modernizing high-horsepower locomotives, providing reliable traction power for heavy freight and industrial rail applications.
The QSK78 integrates Cummins' most advanced heavy-duty technologies to ensure efficiency, durability, and low total operating costs.
Advanced High-Pressure Fuel Systems: It utilizes either the HPI (High-Pressure Injection) or the next-generation Modular Common Rail (MCRS) system. These systems deliver extremely high injection pressures (up to 2,000 bar), ensuring ultra-fine fuel atomization for complete combustion. This results in superior fuel economy, a significant increase in "fuel burn to overhaul" life, and low emissions.
Intelligent Combustion & Air Management:
Quantum System Electronics: The high-speed Electronic Control Module (ECM) precisely manages injection timing and fuel volume, optimizing the combustion process in real-time for peak performance and efficiency.
Two-Stage Turbocharging: A system utilizing Holset turbochargers compresses intake air in two stages with intermediate cooling. This dramatically increases air density, enabling the engine to produce full-rated power at extreme altitudes and improving overall thermal efficiency.
Micro-Turbulence Combustion Chamber (MTCC): This patented technology optimizes air swirl within the cylinder across all engine speeds, leading to improved fuel burn and reduced particulate emissions.
Unmatched Durability & Simplified Maintenance:
Robust Base Engine: Features a heavy-duty, one-piece cast-iron block, a forged high-strength steel crankshaft, and Ferrous Cast Ductile Iron (FCD) pistons for exceptional strength and long life.
Intelligent Maintenance Systems: Optional systems like ELIMINATOR™ (self-cleaning oil filtration) and CENTINEL™ (continuous oil replenishment) drastically extend service intervals—oil change intervals can reach up to 4,500 hours—reducing maintenance costs and downtime.
Proven Reliability: With over 1 million hours of operational experience, its design targets an overhaul life of up to 12,000 hours, validated by field utilization rates exceeding 98% in harsh mining conditions.