01 Oct 2015


Cummins has used the next phase of Euro 6 emission regulations to deliver more power and torque for its 4.5-litre and 6.7-litre engines. From 2017, legislation changes bring in On Board Diagnostics Phase C (OBD-C) for Euro 6 to ensure, among other things, that the engine remains within emissions scope in real life.

While there’s no additional engine hardware or change to aftertreatment (SCR with AdBlue), Cummins has taken the opportunity to more closely align transmission and driveline capabilities, building on its positive Euro 6 experiment to date.

Since launching Euro 6, in Q4 2013, Cummins has supplied 18,500 of its four and six-cylinder ISB4.5 and ISB6.7 engines, of which 4,500 are in PSV applications in Europe.

Now, it promises the best in class power/torque to weight ratio. For the ISB4.5 it has increased torque from 760Nm to 950Nm. The dry engine weight is 341kg. The ISB6.7 has two specifications, truck and bus. In the latter the power is increased to 300hp, while peak torque goes from 1,110Nm to 1,200Nm. The dry engine weight is 522kg.

For both engines, the service intervals are extended past 2,000 hours/90,000km.

Significantly, the additional torque comes in at low engine speeds, with peak torque from 1,200rpm for the 4.5 and 1,100 for the 6.7 version.


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