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X4v2 Prototype -
2.4litre (2007- Current)
The X4v2 is the current prototype under
development and based on the X4v1 engine design.
The X4v2 prototype engine was designed,
machined, assembled and running by the end of
2007. The engine completed tests on the
dynamometer, and was fitted and trialled in the
GTM trike. The engine was independently tested
by Orbital Australia and achieved a top BSFC
figure of 207g/(kW-h) or 39.5% efficiency. |
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Prototype X4v1-
2.4litre (2006-2007)
To meet the requirements of the aircraft
industry, the X4v1 engine was developed in
2006-2007. The CCE design saw a total redesign
in engine layout to make it as compact as
possible. It was found that it was possible to
design four cylinders around two "trilobe" cams
drastically reducing size and total amount of
components. The company also was successful in
securing a Federal Government Grant of over
AUD$1 million. |
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Prototype RHL4 -
1.35litre (2004-2005)
To increase the RPM range, the RHL4 engine had a
redesign to utilise the transfer shaft as the
main output shaft. This provided similar RPM
ranges to convention engines. The engine was
designed as a 1.35litre engine and existing
automotive cylinder heads were used. It was this
prototype which proved the combustion
characteristics independently, having about the
same fuel consumption at 4,000rpm as it did at
2,000rpm. |
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Prototype CCE2003 -
450cc (2003)
To reduce the backlash of the reverse gearing of
the previous prototype the engine saw a total
redesign incorporating a separate transfer
shaft. This design provided a much more compact
design. To reduce timeframe to build existing
cylinder heads from a motorcycle was utilised.
The drive shaft was off the main "trilobe" shaft
which provided a limited RPM range although it
also provided a very high torque output for its
capacity. |
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Prototype CCE2001 -
285cc (2001)
After the initial prototype was built, a
multi-cylinder engine was planned to be built.
Initially it was designed as an air-cooled pump
engine although due to interest from the
automotive industry, during the build it was
redesigned as a water cooled engine. It was
completed in 2001 and was tested extensively
including being supercharged. It was this
prototype that showed the fuel economy
potential. |
