The five-stroke concept – ingeniously simple, simply ingenious
A high level of turbocharging and further expansion in the low-pressure cylinder
enable a high power density and low consumption over the whole working range.
The 5-stroke engine is smaller, lighter and more economical!
This is how the 5-stroke concept, invented by Gerhard Schmitz, works.
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You can find this animation and others in HD resolution on the YouTube fuenftaktmotor channel.
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The 5-stroke engine built in 2007 by the English company Ilmor Engineering Ltd. was a simple test bed engine without any
complex engineering; it immediately produced a measured specific fuel consumption of 226 g/kWh.
This level of consumption is not achieved by even the most modern Otto-cycle engines.
In 2009 a German car manufacturer simulated a 5-stroke engine of 2-litre capacity
using the GT-Power software and calculated a specific fuel consumption value of 204 g/kWh.
This value was also based on a |
simple test bed engine without modern engineering features such as e.g. variable valve timing or direct injection. This value cannot be achieved by Otto-cycle engines. Only modern car diesel engines are able to achieve such low specific consumptions.
In its first version the 5-stroke engine is already more efficient than the most modern Otto-cycle
engines and with consistent further
development can potentially undercut the levels of consumption of modern car diesel engines. |
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