New electric supercharger showcased in demonstrator vehicle at LCV 2015, the UK’s leading low carbon event
MAHLE Powertrain UK’s downsized gasoline engine uses an advanced electric supercharger to create the most torque-dense production viable engine
Kenilworth, UK, 8th September 2015 – The potential of the pioneering electric supercharger from high-tech innovation company, Aeristech will be demonstrated at the Low Carbon Vehicle 2015 (LCV) event at Millbrook on September 9-10. The eSupercharger, which is capable of continuous operation at high boost levels, is an integral part of MAHLE Powertrain UK’s new demonstrator vehicle for advanced engine downsizing technologies. MAHLE’s 1.2-litre, 3-cylinder gasoline engine generates 313Nm of torque and 161kW/litre power output, enabling reduced emissions and increased fuel economy.
“The eSupercharger delivers significant gains in the driveability, power and emissions reduction of downsized internal combustion engines, and we are delighted to demonstrate the potential of our system in conjunction with MAHLE Powertrain UK,” says Aeristech CEO, Bryn Richards. “Our 48v architecture is a cost effective solution for the next generation of downsized internal combustion engines, and could prove to be a vital tool in meeting stringent fleet CO2reduction targets, raising economy and improving driver enjoyment.”
The first generation of MAHLE Powertrain UK’s engine utilised advanced twin-charging to give encouraging results. Further improvement has been gained by replacing the smaller, primary mechanical turbocharger with Aeristech’s eSupercharger, which has in turn enabled the fitment of a larger, more optimised secondary unit.
“The use of our technology has helped allay the fears over driveability that are often associated with using larger turbochargers; unlike alternative technologies, our eSupercharger is capable of providing continuous high levels of boost, which not only improves peak power but gives a wider spread of useable torque throughout the engine’s operating range,” explains Richards. “The engine in MAHLE’s C-segment demonstrator vehicle at LCV 2015 generates a maximum power output of 193kW and 33 Bar BMEP output, the latter is in excess of any gasoline engine currently available in series production.”
Using an eSupercharger also has advantages for emissions control. Because it is fitted to the inlet side of the engine thermal mass in the exhaust stream is reduced, which helps to maintain catalyst temperature, especially at lower speeds and loads.
Aeristech’s motor control strategy separates commutation and power control which means the electrical switching frequency need be no higher than running speed. This fundamentally new approach dramatically reduces the cost of many key switching components while ensuring exceptionally accurate high-transient speed control.
The company’s expertise in permanent magnet e-machine design means the electric motor has class-leading power density and low inertia. The eSupercharger operates at up to 150,000 rpm with a transient response of idle-to-target speed in under 0.4 seconds.
“We are the first company to make high performance permanent magnet motors sufficiently cost-effective for eSupercharger application,” says Richards. “It means we completely avoid the thermal issues that arise with switched reluctance motors, providing continuous levels of boost pressure. Together with the imminent arrival of 48v architectures throughout the industry, this will enable more downsizing and higher engine efficiencies, leading in turn to vehicles with both lower CO2emissions and better driveability.”
About Aeristech
Aeristech is a British clean technology innovation business that is developing a range of electrically driven pressure charging technologies that will help to solve the driveability, emissions, integration and cost challenges facing the next generation of high efficiency gasoline and diesel engines. Validated by highly regarded technology specialists, MAHLE Powertrain UK and Ricardo, Aeristech’s patented technologies provide both transient and continuous levels of boost, which is unlike any other product currently on the market.
The company was founded around an innovative permanent magnetic switching architecture that has enabled Aeristech to produce the most power dense electric motor of its type currently available. This core technology forms the basis of the company’s range of products, which include an electric supercharger, full electric turbocharger, fuel cell air compressor and turbine generator.
The drive to reduce emissions ahead of the EU 95g/km 2020 legislation is leading to a growth in hybridised vehicles and as a result, a rise of 48V electrical systems in vehicles. Aeristech’s proven technologies take advantage of this trend and are helping vehicle manufacturers make step-change efficiency improvements to their existing powertrains.
As a one-stop-shop for electrically driven pressure charging solutions, Aeristech designs, tests and develops every aspect of the system, from the bearings to the compressor wheel, to suit the customers’ individual application. The company is working with vehicle manufacturers and suppliers to licence innovative proprietary technologies to reduce tailpipe emissions, increase fuel efficiency and heighten driving characteristics of the next generation of ‘right-sized’ diesel and gasoline engines.
Press contact:
Richard Doherty at Market Engineering
+44 (0)1295 277 050
richard.doherty@m-eng.com
Market Engineering is Europe’s leading specialist in media relations and communications for the automotive industry.
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