As the next stage in the Euro-6 emissions standard approaches, Volvo Trucks has introduced a modified range of compliant engines, available now. Step D of Euro-6 (pictured below) tightens still further the onboard policing requirement for engines, and increases the range of operating conditions monitored.
Under the current Step C, emissions figures as measured by PEMS (portable engine measurement system) can be ignored when the engine is developing less than 20% of its maximum power, but Step D reduces this threshold to 10%.
The new requirement has been in place since September 2018 for newly homologated engines, and will apply to existing engine designs from this September.
Volvo has taken the opportunity to apply numerous detail changes to its D11 and D13 engines as fitted to FH, FM and FMX models.
Volvo Trucks former president Claes Nilsson said: “With fuel chalking up about one third of hauliers’ costs, we continue to turn every stone to find ways of reducing fuel consumption in our trucks. This time, a combination of small improvements enables significant cost savings for customers without compromising performance or productivity.”
Both engines get new software and an improved coating in the exhaust after-treatment system, while the D13 uses a new VDS-5 low-viscosity oil type with new oil control piston rings that reduce internal friction. The 500hp engine now has the same higher compression ratio as the 460hp and 420hp ratings.
Volvo’s I-See predictive cruise control has been upgraded with a new gear selection strategy and more effective selective coasting in the I-Roll function.
