CUMMINS UPGRADES F SERIES ENGINES TO EURO 6 PHASE-D
At Busworld Turkey in Istanbul (5–7 March) Cummins introduced the latest Euro 6 Phase-D design evolution of the Cummins 2.8-litre and 3.8-litre F Series engines. Small compact engines with EGR-free design build for touring, intercity and shuttle mini-coaches.
The upgraded F Series comes with more torque, more fuel-efficiency and are quieter, for 5 to 8-metre length light passenger vehicles. The F Series has ratings extending from 129 to 188 hp (96-140 kW) and with up to 700 Nm peak torque. The four-cylinder F Euro 6 engines also includes smart electronic management, telematics ready capability and an integral Stop/Start system to eliminate almost all engine idling.
The Single ModuleTM exhaust aftertreatment enable the F Series engines to meet stringent Euro 6 Phase-D regulations without the need for an exhaust gas recirculation (EGR) system on the engine. Cummins states that as a result, cooling demands are lower, architecture is simpler, and the engine is able to realize its full power potential with relaxed ease. The smaller packaging of the Single Module is achieved with a higher conversion efficiency for Nitrogen Oxide (NOx) emissions and ultra-clean filtration removing over 99 percent of Particulate Matter (PM) emissions. Sensors and precision controls ensure that thermal and pressure conditions are maintained under all conditions. A high-pressure common rail fuel system provides smoother and more rapid engine response. Engine diagnostics and trip data can be quickly accessed with Cummins digital service tools.
The F2.8 extends from 129 to 174 hp (96-130 kW) with peak torque up to 450 Nm, while the F3.8 covers a 141 to 188 hp (105-140 kW) range with a peak torque of 700 Nm. The F Series engines provide a rapid torque rise from low rpm engine speed up to peak torque and then maintain that right across the key operating range. The engine block is made of high strength cast-iron while composite material is used for the valve cover and oil pan. The piston and cylinder assembly minimizes friction losses and provides more effective heat control, helping to improve fuel efficiency and durability.
The Cummins wastegate turbocharger utilized on the F2.8 and F3.8 work in conjunction with air throttle valves in a closed loop system to precisely manage the engine air flow. Additionally, the 174 hp (130 kW) rated F2.8 features a variable geometry turbocharger with throttle valve to deliver more horsepower. The air-handling system also brings the benefit of more powerful exhaust braking, reducing service brake wear and improving vehicle safety. Additionally, the IntebrakeTM brake option for the F3.8 offers a compression braking capability of up to 113 hp (84 kW).