grober
MB Master
Interesting site for those interested in engine development. http://www.coatesengine.com/csrv.html and here http://www.coatesengine.com/engine_of_the_future.html
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Satch
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grober said:
Rotary valves have been around for a while but never got very far.
http://www.dself.dsl.pipex.com/MUSEUM/POWER/RotaryValveIC/RotaryValveIC.htm
If Coates have solved the problems good for them because it is a sound idea
prprandall51
MB Enthusiast
If valve bounce were a limiting factor in modern engine design (as implied in the referenced article), this problem is already addressed by the desmodromic valve system where a second cam closes the valve (in addition to the primary cam that opens it). I always understood piston speed to be the limiting factor in an engine with regard to maximum RPM (this being why small capacity motorbike engines can rev to extremely high rotational speeds because their piston speed through the bore is in fact not much different at max rpm to a car engine's).
Whilst the engine sounds very interesting, the article makes some sweeping statements about the limitations of the Otto cycle engine that don't seem to ring true to me.
And what about the ****el engine? These run much smaller swept capacities than the Otto cycle engine to produce a comparable power output and they rev much higher, too. Is it fair to compare engines purely on the basis of their swept capacity?
Having said all that, it looks very interesting. But there must be limitations or surely it would already have appeared in a production car. After all, manufacturers are not afraid to experiment o nthe public (****el engines, variable ratio gearboxes, SBC brakes, fold-out cup holders, etc.).
Philip
Whilst the engine sounds very interesting, the article makes some sweeping statements about the limitations of the Otto cycle engine that don't seem to ring true to me.
And what about the ****el engine? These run much smaller swept capacities than the Otto cycle engine to produce a comparable power output and they rev much higher, too. Is it fair to compare engines purely on the basis of their swept capacity?
Having said all that, it looks very interesting. But there must be limitations or surely it would already have appeared in a production car. After all, manufacturers are not afraid to experiment o nthe public (****el engines, variable ratio gearboxes, SBC brakes, fold-out cup holders, etc.).
Philip
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