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I was talking about Mazdas sky-activ gasoline engine with multiple injections, which is gasoline and spark ignited. Preignition is impossible when you only introduce 20% of the total amount of fuel injected during each combustion stroke. They also stop the engine in a specific position so they can restart it without any other components to accomplsih stop start.
Not sure about the piezo electric statement since transonics design is the injector. I think the operating pressure at 30k is correct. The fact that Caterpillar has decided to support them is huge with an 80 billion corporation with worldwide markets providing the r&d funding for further refinement to address the issues you raise. Most inventions are rarely practical without further refinement.
As far as withholding patent applications, I'm sure you know the history of Bell's telephone patent which preceeded his competitors patent by 2 hours. To assume there will be no competitor who is following the same pathway risks loosing the opportunity, precisely what happened to Bell's competitor (the loosing the opportunity part). I would prefer to get my Patent then spend the time period of protection to obtain further patents for refinements and that is something I will not discuss or reveal.
regards
mech
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