TRD Aurion: World's First Production Car With TVS
Channel Staff - 20/June/2007
TRD Aurion will output at least 235kW (315hp)
With Eaton's new TVS technology,
the TRD Aurion is going to be fast
Melbourne, Australia —
Toyota's flagship large car, the Aurion, is about to get its very own
performance model, not unlike the hot HSV and FPV versions of
the Ford Falcon and Holden Commodore.
The key difference to the
current Australian muscle car heroes, which take advantage of large V8
and turbocharged 6-cylinder power, is that Toyota has opted to go down the
supercharging route, adding a roots-type supercharger to the Aurion's
Lexus-sourced 3.5-litre V6.
Toyota will badge the new Aurion a TRD,
which stands for Toyota Racing Development, and most of the research,
development, and testing on the new car is already complete. It will
feature a new look body kit, redesigned interior, plus performance
brakes and tyres.
we can also confirm that TRD has been working closely
with Melbourne-based Harrop Engineering in order to boost the
Aurions performance with an innovative supercharger system.
According to TRD's chief engineer Stephen Castles, the blown Aurion will be the first production car in the world to use the
new Eaton 'twin-vortices' supercharger (TVS), which was packaged locally
by Harrop Engineering, and hence their involvement.
"The TVS unit has performed really well and definitely helped deliver the engine performance we need," said Mr Castles.
TVS is different to conventional superchargers in that it doesn't need
an intercooler to develop high levels of boost, because the unit has
inherent thermal efficiencies. In other words, it doesn't need to cool
the intake air because heat generation. The American company that
developed the technology, Eaton, first showcased the technology at the
2006 SEMA tradeshow in Las Vegas,
engineer said the supercharged V6 engine that will power the Aurion has
performance targets. Stephen Castles then revealed that a power output
target of at least 235kW for the supercharged 3.5-litre dual VVT-i V6
engine has been achieved, and added that final acceleration times are
even better than predicted when development began two years ago.
"The total engine performance is definitely one of the key positives of
the TRD Aurion package," Mr Castles said, adding that his team of
engineers continually set tougher targets during the development
stage, all the while maintaining Toyota's
high levels of quality, durability and reliability (QDR).
Mr Castles said the manufacturing of supercharger components was
simplified as the Eaton-designed unit does not require an intercooler,
and that the new TVS substantially reduces engine noise. He continued
by saying that the basis for the TRD Aurion's performance, the standard
Aurion V6 engine, was vital to the success of the TRD Aurion program:
"It was a great benefit to have such a well-designed, sophisticated and
well-built engine to work with from the start."
as Harrop Engineering, the Perth-based Orbital Engine Company assisted
TRD with vital testing and component development: "Our engine
calibration partner Orbital was surprised at how well the
components stood up after putting it through some rigorous
see the collaboration with key local suppliers as crucial to
maintaining the Toyota DNA of QDR," concluded TRD's chief engineer,
The new TRD Aurion is expected to rival
the Ford Falcon XR6 Turbos levels of performance, and like the XR6T
could become a cult hit in Australia, particularly with enthusiasts and
Twin Vortices Supercharger
According to Eaton, the new patented TVS design features four-lobe rotors and high-flow
inlet and outlet ports that greatly enhance thermal efficiency (negating the need for an intercooling in some instances),
which enables greater volumetric capacity at higher revolutions per minute
the TVS(TM) is a game changer that will allow our customers
to make more horsepower without the traditional engineering trade offs,"
commented Jeff Romig, the vice president and general manager of Eaton's
Previous Eaton Roots-type designs featured only three-lobe rotor
assemblies. "The TVS design has remarkably improved
efficiencies and broadens the performance range of the supercharger
across an engine's entire performance range," stated Eaton's GM, Mr Romig.
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