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Detonation is a misused word. Pre-ignition is the common problem which cause mis-timing of the combustion cycle.
Pre-ignition occurs from a combination of high heat ignition source, temperature and lean ratio mixes.
Detonation has two main features, a) poor combustion design that causes a clash of two flame fronts within the combustion chamber that causes two shock waves to hit each other and creates a destructive force. b) a correct combustion chamber that allows the ultra lean fuel mix to explode omni-direction and consumes all the fuel mixture and then extinguishes itself and thus renders no harm to the engine with the expanding gas as the work loan and the contracting gas as a cooling gas at the end of the cycle.
A petrol engine with the correct combustion chamber can run on compression ratios of 20:1 and lean petrol mixes as a detonation engine.
The real future of the petrol engine is yet to be produced with extraordinary milage and low pollutants.
SCB
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∙ 12y ago
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