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07 October 2009
Ilmor Engineering is pleased to announce that its presence at the Professional Motorsport World (PMW) Expo in Cologne, Germany from 3rd-5th November
26 August 2009
Ilmor Engineering Ltd has achieved ISO 9001:2008 certification through TUV UK, demonstrating our longstanding commitment to the quality of Ilmor’s products and customer satisfaction
12 August 2009
With its first prototype Five-Stroke having achieved an impressive fuel consumption figure of 226g/kWh, engine designer and manufacturer Ilmor Engineering is planning a second phase development engine...
31 July 2009
Following on from the success of their appearance at the 2008 PMW show Ilmor recently exhibited at the 2009 Engine Expo in Stuttgart, Germany.
15 May 2009
Ilmor has previously offered the opportunity of an industrial placement to engineering undergraduates, typically 9-12 months in duration.
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Our objective with the 5-stroke engine is to develop a gasoline engine with fuel consumption and emission levels comparable to that of current diesel engines, without the serious problem of particulate and NOx emissions that plague diesels.
The engine concept, which was invented by Gerhard Schmitz, has been developed by Ilmor into a working engine using a rapid prototype cast cylinder head, a machined from solid cylinder block and separate electrically powered oil and water pumps. Two overhead camshafts operate the conventional coil spring valvegear with the HP camshaft running at 0.5 x crank speed and the LP camshaft running at 1 x crank speed. The engine is also turbocharged to increase the engine rating.
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5-stroke performance figures
- Engine capacity 700cc (turbocharged)
- Peak power 130 bhp @ 7000 rpm
- Peak torque 166 Nm @ 5000 rpm
- Fuel consumption of only 226 g/kWh
Advantages of the 5-stroke concept
- A secondary cylinder provides an additional expansion process enabling extra work to be extracted, hence increasing thermodynamic efficiency.
- The engine runs an overall expansion ratio approaching that of a diesel engine – in the region of 14.5:1
- Minimised pumping work due to the downsizing effect from highly rated firing cylinders.
- The compression ratio can be reduced to delay knock onset without a reduction in performance.
- Because the firing cylinders can be very highly rated, the engine is relatively compact.
- The fuel consumption does not rise as rapidly with increasing BMEP, as retarding rejects more energy into the expansion cylinder.
- The engine uses 100% conventional technology and so requires no new manufacturing techniques.
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