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Scania heads for clean air with all-Euro 5 compliant truck range

Scania will offer the Australian market the cleanest possible engines across its entire 2010 truck range.

All of Scania’s 9-, 13- and 16-litre high-torque engines will be available to Euro 5 compliance from January production, putting the Swedish manufacturer a full year ahead of Australia’s mandated Euro 5 compliance.

All models of P-series, new G-series and new R-series trucks will be offered to Euro 5 emissions compliance, although the still current Euro 4 specification continues to be available on customer request on certain engines.

There is no power or torque loss moving to Euro 5. In fact, the surfeit of high torque at low revs provides the potential to save more fuel via a faster rear axle ratio.

All engines have been tuned to provide maximum torque from as low as 1,000rpm to boost low-speed power and driveability.

Scania’s average torque-to-power ratio in the 300-500hp segment delivered by its 5- and 6-cylinder engines (Euro 4 and Euro 5) is higher than many competitive makes.

The Scania Australia road to Euro 5 began in early 2008 when the P 420 SCR Euro 5 engine was launched alongside the 16-litre V8 SCR Euro 4 range.

Now Scania Australia is specifying its 500hp, 560hp and 620hp V8 16-litre SCR engines used in the R-series to Euro 5 compliance.

The new range of 13-litre six-cylinder engines is also Euro 5 compliant. This range, available in 360hp, 400hp, 440hp and 480hp models uses the new generation Scania XPI extra high-pressure injection and variable geometry turbocharger technology to deliver cleaner emissions through the combustion process using Exhaust Gas Recirculation, eliminating the need for exhaust gas after-treatment using AdBlue.

Scania has been able to combine EGR with low particulate emissions and perfect combustion via high injection pressures. There is no soot problem with Scania EGR. Soot is developed when there is a late combustion.

The 13-litre XPI engine is available in the P-series, G-series and R-series trucks, typically with the 360hp and 400hp in the P-series, all variants in the G-series and as a 480hp version in the R-series.

For the new range of Euro 5 six-cylinder engines, Scania introduces a two-stage EGR, patented and unique to Scania.

Along with the variable geometry turbocharger, the EGR valve controls the amount of exhaust gases that are recirculated. Both are controlled by the engine management system.

For the first stage, the recirculated exhaust gases are cooled by a water cooler on the engine.

In the second stage, an air cooler mounted in front of the radiator further reduces the temperature of the EGR gases. The use of the second stage is controlled a by-pass valve, which opens at low ambient temperature.

For the P-series range, Scania also offers the 9-litre, five-cylinder modular engine complete with XPI technology. This is available in Euro 5 guise in 230hp, 280hp and 320hp output levels.

In fact, these engines may also be specified to meet the even tougher Euro 5 Plus EEV (Enhanced Environmentally-Friendly Vehicle) standard. These Scania Euro 5 Plus EEV engines have already been fitted to Australian-delivered bus chassis in large numbers for more than one year, and offered to European truck customers for longer than that.

The key difference between the Euro 4 and Euro 5 standards is the reduction in permitted NOx emissions, from 3.5 grams per kWh to 2.0 g/kWh.

The difference between Euro 5 and Euro 5 Plus EEV is a further reduction in hydrocarbons, from 0.46 g/kWh to 0.25 g/kWh. These Euro 5 Plus EEV engines are also fitted with particulate filters.

“Offering our 2010 range as Euro 5 compliant a full year ahead of the implementation of the new legislation demonstrates Scania’s desire to reduce, as soon as possible, noxious emissions,” says Roger McCarthy, Managing Director, Scania Australia.

“Scania is making this move to show leadership in this area, as well as meet the needs of the growing number of customers who are becoming environmentally conscious.

“Scania has been at the forefront of emissions control for many years, bringing advanced emissions reduction solutions to market far sooner than required and in some cases helping to drive the legislation forward.

“In Australia, our offer of Euro 5 Plus EEV engines for public transport operators has seen our bus sales reach a record high during 2009. Many of our fleet customers in the truck arena are extremely keen to adopt the cleanest emissions technology available as well.

“I am certain that the market will respond favourably to this move to offer Euro 5 across our full range,” Roger says.