
PRODUCT Detail
The Cummins L9 diesel for 2017 delivers outstanding productivity and the best power-to-weight ratio in its class. Faster, more accurate service provides even greater uptime, and customers can expect up to 15 percent better fuel economy over the engines of the last decade.
Aftertreatment Technology: Simply Better
The Cummins L9 diesel engine features a new Single Module™ aftertreatment system that sets the new standard for efficiency. It combines Selective Catalytic Reduction (SCR) and a Diesel Particulate Filter (DPF) into a single flow-through design.
Connected Diagnostics: Smarter Route Management with Connected Diagnostics
School bus drivers have enough to pay attention to without being concerned about engine fault codes. In the rare event that one is triggered while the bus is in operation, it can be diagnosed immediately over the air, through the addition of Connected Diagnostics. Cummins Connected Diagnostics delivers real-time engine fault code analysis, with a probable diagnosis and a recommended action for school buses that are equipped with telematics.
Advertised Horsepower | 260-350 HP | 194-261 Kw |
Peak Torque | 720-1000 lb-ft | 976-1356 N*m |
Governed Speed | 2200 rpm | |
Clutch Engagement Torque | 500 lb-ft | 678 N*m |
Number of Cylinders | 6 | |
Engine Weight (Dry) | 1,695 Lbs | 769 Kg |
Cummins designs, develops and supports every component, from the air handling to the exhaust aftertreatment, to work as a totally integrated system – so we can optimize every function better than other engine manufacturers.
VGT® Turbocharger from Cummins Turbo Technologies – The patented design is widely recognized as an industry performance leader. Electronic actuation improves precision and responsiveness. The VGT Turbo is a key element in providing exceptional fuel economy and braking horsepower
Connected Diagnostics™ – Wirelessly connects your engine to Cummins through a telematics device for immediate diagnosis of a fault alert. Provides a clear recommendation for continued operation, or the need for service, within seconds.
XPI Fuel System from Cummins Fuel Systems – Delivers superior performance even in lower engine rpm ranges. Enables multiple injection events per cycle, for improved fuel efficiency with quieter, smoother operation.
Single Module Aftertreatment From Cummins Emission Solutions –
Combines high-efficiency SCR, a more reliable dosing unit and a DPF into a single flow-through unit. It is up to 70 percent smaller, so it’s easier to install, and as much as 30 percent lighter than the aftertreatment units it replaces. Better heat management improves fuel efficiency and minimizes periodic maintenance.Fuel Filters And Lube Filters From Cummins Filtration – Fleetguard® filters protect against corrosion and contaminants with innovative technology, including NanoNet® media, which provides 10 times better protection than conventional fuel filters.
Single High-Capacity Electronic Control Module (ECM) – A higher capacity offers faster processing of more information, fully integrated control over the engine and aftertreatment system for optimized performance and improved engine lamp strategy.

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