MFB to hose down emissions with new fleet of Scania Euro 6 pumpers
A new ultra-large pumper stars in the MFB’s new fleet of ultra-clean Scania Euro 6 compliant heavy pumper-tankers.
Melbourne’s Metropolitan Fire and Emergency Services Board will take the lead among emergency services and truck fleets in general in Australia, when a new fleet of Euro 6 emissions compliant vehicles supplied by Scania arrives early in the New Year.
The MFB has ordered 8 Euro 6-compliant Scania vehicles, 6 of which will be built up into heavy pumper-tankers, with one a prototype of a future ultra-large pumper, and the other carrying a Bronto aerial platform.
As such the MFB would be the operator of the largest fleet of Euro 6 compliant trucks in Australia, while the ACT’s public transport operator, ACTION, continues as the overall largest operator of Euro 6 vehicles, with 77 Scania Euro 6-compliant buses in service.
The MFB has a heritage of leadership in reducing emissions. It was the first to adopt Euro 5 emission compliance as soon as it became available within the era of the Euro 4 mandate several years ago.
"Scania is committed to providing ‘best in class’ environmentally sustainable solutions to government and commercial customers," says Shane Griffin, Scania National Manager for Specialist Vehicles.
"We are the Australian market leaders in the provision of the widest range of Euro 6 compliant engines, giving more truck and bus operators the ability to select the cleanest emission options immediately.
"The MFB has a long history of commitment to operating the most environmentally-friendly vehicles on the market.
"We offered the Euro 6 option to the MFB during the most recent tender and they were very keen to adopt the technology for the new 370 hp and 410 hp pumpers," he says.
These vehicles will be fitted with Scania’s legendary 6-cylinder engines that are renowned for their fuel-efficiency and performance.
"The new vehicles are additional units for the MFB fleet, providing improved coverage for the metropolitan area," Shane says.
"One of the 8 new vehicles is the prototype of an ultra-large pumper, which will be built by SEM in Wendouree, Ballarat. It will be powered by the new 410 hp Euro 6, 6-cylinder engine, using a 6x4 chassis configuration. This vehicle could spawn multiple copies in the future.
"Six of the other Euro 6 heavy pumper-tankers are being built by Fraser Fire and
Rescue in New Zealand, based on the P 370 6x4 chassis," Shane says.
The final new Euro 6 machine is a Bronto aerial platform powered by a 410 hp engine on an 8x4 configuration chassis.
The vehicles are expected to be delivered and go into service between February and April 2016.
According to Stuart Collis, Fleet Development Manager for Melbourne’s MFB, the choice of Scania vehicles is driven by several factors. One of which is that the MFB continues to desire the most environmentally friendly equipment available, which now includes adding Euro 6-compliant vehicles to the fleet during the normal replacement cycle.
"There’s both an Occupational Health and Safety and a Social Responsibility aspect to this, as well," he says.
"Every day, the trucks are driven inside buildings, which are uniquely both work-places and residences for the MFB’s operational men and women. The health and welfare of fire-fighters is taken seriously at all times," he says.
"Reduced particulates and the cleaner exhausts offered by Euro 6 compliance are better for everyone in our community," Stuart says.
Scania’s compliance with the stricter Swedish safety regulations also helped swing the MFB’s choice to Scania.
"Having airbags in the cabin, more safety features, better steps, more handles for getting in and out of the truck, they all make the new trucks easier and safer to work with for crews. They are just better ergonomic solutions," Stuart says.
A long-standing relationship with Scania’s local team is also important.
"Servicing, parts, anything to do with the trucks has proven to be problem-free," he says.
"In the busy urban environment, the MFB’s staff needs to be 100% confident that their appliances will be 100% reliable, 100% of the time," Stuart says.
"Scania has strong working relationships with every major fire and rescue organisation in Australia," Shane Griffin says.
"We have upwards of 650 fire and rescue vehicles in service around the country, many of which have been on duty for more than a decade and some are expected to serve out 20 years or more.
"This underlines our core values of reliability and durability and our organisation’s commitment and ability to keep older vehicles in prime condition for protecting the community when disaster strikes. Another key benefit is that emergency crews just love driving their Scanias.
"In the past we have focussed on the heavy end of the fire and rescue market, but in recent times we have begun to supply medium-duty pumpers to the Victorian CFA. We expect to supply further examples of these more flexible vehicles more widely into the future," Shane says.
Euro 6 technology in brief
Euro 6 provides a drastic reduction in particulate emission levels compared to Euro 5.
Emissions of nitrogen oxides and particulates are around one-fifth of those for Euro 5 engines.
A new element in emission testing is that the particles also need to be counted, which in practice means that the actual particulate emissions will be around one-sixth of Euro 5.
"All our development work was performed in-house at Scania," says Jonas Hofstedt, Senior Vice President, Powertrain at Scania.
"We combined all the new technologies that Scania has developed in recent years: exhaust gas recirculation, variable turbo geometry, common-rail high-pressure fuel injection, selective catalytic reduction and particulate filtering.
Add to that our own engine and exhaust management technology, which has now been integrated into one system.
"We have spared no effort to avoid fuel penalties on these engines. Operators will find that fuel economy, driveability and engine response are fully on a par with our Euro 5 engines," he says.
Euro 6 is the first step towards the implementation of world harmonized emission standards, encompassing Europe, North America and Japan, and this will facilitate coordination and development for future standards.
Scania EGR + SCR emissions treatments
In the Scania Euro 6 engines that use both EGR+SCR after-treatments to achieve compliance, the two processes are continuously balanced to optimise emission performance.
Typically, around 50% of NOx emissions are eliminated at source by the EGR system and another 95% in the SCR catalysts and the particulate filter reduces particulate emissions by 99%.
The Scania integrated silencer is an exceptionally compact insulated unit containing an oxidation catalyst and a full-flow particulate filter, followed by two parallel SCR catalysts and ammonium slip catalysts.
Scania has developed a new electrically actuated AdBlue dosage system for higher precision, greater robustness and airless operation. AdBlue is injected into a mixer (patented by Scania) and evaporates into urea before entering the two parallel SCR catalysts.
Next in line is a compact and efficient ammonium-slip catalyst to remove any ammonium left in the exhaust flow. The evaporation route is extremely short, making it easy to maintain the required temperature. New temperature, pressure and NOx sensors monitor the system for optimum performance and control.
Using two sensors, the pressure differential is monitored across the integrated particulate filter to assess the degree of contamination and, hence, the need for regeneration.
Regeneration takes place continuously during driving. If the filter continues to clog with soot, the driver will get recommendations in the central instrument cluster. A switch is provided in case a stationary regeneration cycle should be required.
The particulate filter needs to be cleaned at regular intervals. It is detachable from the silencer unit, which is mounted on a swing-out attachment with two bolts for easy maintenance and replacement of the filter cartridge.
Maintenance intervals are the same as for Scania’s 13-litre Euro 5 EGR engines,
i.e. up to 90,000 km (120,000 km at max. 36 tonnes GVW), depending on application.
The compact design of the silencer unit means that it does not take up more space on the frame than the Euro 5 design (EGR or SCR). The modular design makes it readily adaptable to suit different bodywork installations.
Euro 6 Emission standards
Nitrogen oxides: 0.4 g/kWh (2 g/kWh for Euro 5).
Particulate matter: 0.01 g/kWh (0.02/0.03 depending on test cycle for Euro 5).
Particulate count: 6.00 x 1011 particles/kWh (transient test cycle).
8.00 x 1011 particles/kWh (stationary test cycle).
This amounts to 600 or 800 billion particles per kWh. One kWh corresponds to the energy consumed during approx. 30s of driving for a 40-tonne combination at highway speed.
There is no counting requirement for Euro 5, but the reduction in the number of particulates is likely to be around 99% for Euro 6 compliance.