SmartEfficiency: High-Achieve and Cost-Lowering

The Cummins SmartEfficiency initiative is a focused approach that improves uptime and reliability while providing a broad spectrum of reliable engine choices to meet every need. The combination of a low cost of operation, high reliability, clean operation and long-term durability are unsurpassed in the industry. The fact that all Cummins engines use the same control system technology and can be serviced at any authorized Cummins location ensures serviceability anywhere, anytime

Even with a legacy of over 12 million B series engines sold over the last 32 years, we continue to keep improving a time-tested and proven reliable product. That’s why Cummins is redefining a classic and introducing the newest-generation B Series engine – the B6.7. The Cummins B6.7 for 2017 is more efficient, with up to 7 percent better fuel economy over the EPA 2013 ISB6.7.  The B6.7 will have accumulated 1.5 million test miles in multiple real-world applications prior to its 2017 launch, ensuring exceptional uptime from the start. Plus, the 2017 B6.7 will be fully capable for the introduction of stop-start technology that will yield further improvements in fuel economy in stop-and-go duty cycles. That’s Cummins, SmartEfficiency – not just for the B6.7, but for an entire industry.

Aftertreatment Technology: Simply Better

The Cummins B6.7 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. It occupies up to 70 percent less space and weighs up to 30 percent less. The smaller size allows it to be installed closer to the engine, for better heat management. That, together with the reduced weight, contributes to improved fuel economy. The UL2 Urea Dosing System eliminates the need for engine coolant lines to the doser, provides more efficient atomization, to minimize the risk of urea dosing deposits and reduces regeneration events, while maintaining a 3 percent to 4 percent Diesel Exhaust Fluid (DEF) usage factor.

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.

Peak Torque 520-660 lb-ft 705-896 N*m
Governed Speed 2600 rpm
Clutch Engagement Torque 400 lb-ft 542 N*m
Number of Cylinders 6
Engine Weight (Dry) 1,150 Lbs 522 Kg
Engine Model Advertised
HP (Kw)
Peak Torque
Lb-ft (N*m) @ RPM
Governed Speed
B6.7 300 300 (224) 660 (895) @ 1600 2600
B6.7 280 280 (209) 660 (895) @ 1600 2600
B6.7 260 260 (194) 660 (895) @ 1600 2600
B6.7 250 250 (187) 660 (895) @ 1600 2600
B6.7 240 240 (179) 560 (759) @ 1600 2600
B6.7 220 220 (164) 600 (814) @ 1600 2600
B6.7 220 220 (164) 520 (705) @ 1600 2600
B6.7 200 200 (149) 520 (705) @ 1600 2600

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 Turbo from Cummins Turbo Technologies - This patented design is widely recognized as an industry performance leader. The refined design improves responsiveness in the B6.7 while an upgraded bearing system increases overall robustness. The VGT Turbo is a key element in providing increased fuel economy and exceptional braking horsepower

  • Connected Diagnostics™ - Wirelessly connect your engine to Cummins through a telematics device for immediate diagnosis of a fault alert. Within seconds, Connected Diagnostics provides a clear recommendation for continued operation or the need for service.

  • High Pressure Common Rail (HPCR) Fuel System - Delivers superior performance even in lower engine rpm ranges. Enables multiple injection events per cycle, for improved fuel efficiency with quieter, smoother operation.

  • Air Handling System - A more robust Exhaust Gas Recirculation (EGR) cooler and valve enhance thermal efficiency and reliability.

  • 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 NanoNet® technology. NanoNet media provides 10 times better protection than conventional fuel filters for lower cost of operation.

  • Single High-Capacity Electronic Control Module (ECM) - Offers higher capacity for faster processing of more information, fully integrated control over the engine and aftertreatment system for optimized performance and improved engine lamp strategy.

Maintenance Item Miles/Kilometers Hours Months
Oil and Filter 15,000 mi
24,000 km
500 6
Fuel Filter 15,000 mi
24,000 km
500 6
Overhead Adjustment 150,000 mi
240,000 km
5,000 48
Coolant Check 60,000 mi
96,000 km
2,000 24
Coalescing Filter 75,000 mi
120,000 km
DEF Filter 200,000 mi
320,000 km
Diesel Particulate Filter 200,000 mi
320,000 km

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