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Thread: Interesting engine idea

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    Default Interesting engine idea

    Alright, I'm not really sure if this is the correct forum to ask this, but we'll give it a go anyway. I've had an interesting idea for an engine, and I'm wondering WHY we haven't seen it done before. I've seen DIESEL engines with compression as low as around 16:1, and I've seen spark-ignition engines with compression as HIGH as around 16:1. So I'm wondering why you couldn't make a VERY efficient, high performance engine, with a compression ratio of around 15.5 or 16:1, that ran on DIESEL until low/mid RPM (great for low down TORQUE) and then ran on say, E85 or Methanol or something after that point. Obviously you'd need 2 sets of fuel injectors, and a separate injector pump, glow plugs etc for the DIESEL side of it, and another set of injectors, spark plugs, distributor/coils etc for the spark ignition side of it, so I understand that this would result in alot more cost. But I feel as though you may be able to produce a lot of torque and horsepower, and may be practical for a drag racing application for example. Does anyone else have any thoughts or ideas on this scenario?

    Gab



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    Camshaft timing will be totally different for the different fuels and the compression ratio will likely cause irregular detonation on petrol/E85.

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    Given the OP has not participated in this (and other threads) he started... saying he only started them as he 'was bored'.

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