Cummins ISB6.7
Diesel Engine 2013
The 2013 Cummins ISB6.7 is a 6.7-liter diesel engine designed for medium-duty trucks, school buses, and RVs, delivering 200–360 hp and 520–800 lb-ft of torque. Meeting 2014 EPA greenhouse gas standards early, it offers 2% better fuel economy than 2012 models via improved Exhaust Gas Recirculation (EGR) and an air-intake throttle.
Key Features and Specs (2013 Model Year)
Performance
Up to 360 hp and 800 lb-ft torque (higher ratings available for RV/specialty applications)
Emissions
Uses cooled EGR, Diesel Particulate Filter (DPF), and Selective Catalytic Reduction (SCR) with DEF for near-zero emissions
Turbocharger
Holset Variable Geometry Turbocharger (VGT) with electric actuation for improved responsiveness
Fuel System
High-Pressure Common Rail (HPCR)
Fuel Economy
Enhanced over 2012 models by up to 2% due to an added air-intake throttle
Duty Cycle
Primarily used in Class 5-7 medium-duty trucks, school buses, and luxury motorhomes
Key Advancements in 2013
Efficiency
The addition of an air-intake throttle optimizes the EGR system, reducing parasitic losses
Maintenance
Long service intervals and a high-capacity Electronic Control Module (ECM) managing both engine and aftertreatment
Reliability
The engine was highly regarded for reliability in commercial, high-idle applications