DETROIT – Finding a sure-fire solution to low-speed preignition in boosted engines remains elusive, with experts on a panel at the SAE World Congress Experience here saying testing data suggests multiple ways to mitigate – but not totally prevent – the problem. LSPI, also known as “superknock” or “megaknock,” is believed to occur when small bits of carbon or random fuel-oil droplets collect in a combustion chamber and spontaneously ignite under heat ...

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