Quote:
Originally Posted by serialk11r
Actually this is a pretty good idea. Running at a single speed should make scavenging a pretty simple affair (I guess you might have to adjust for air density differences, but I think that's not a big issue if you allow some reasonable amount of trapped exhaust). Have cam actuated valves, fuel injection of course, and a very high static compression ratio. If you really want to chase down the last bit of friction rods can be lightened since they don't have a strong load reversal and thus fatigue resistance requirements.
GM is good friends with Eaton, they can surely strike up a deal for some superchargers with better rotor sealing for scavenging purposes.
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The main advantage I see in a 2-stroke gasser is the absence of a valvetrain, which leads to a lighter and more compact cylinder head design, and also decreasing the demand for maintenance.
As far as superchargers go, it wouldn't be so bad if GM started to make 2-stroke Diesels again, but something more efficient and with a better power-to-weight ratio than the older Detroits. With current VGT developments it could even have some reasonable improvements in engine-braking.