Knock Sensors in DI/TGDI Engines

[Danh]

All modern gasoline engines have knock sensors. In a typical port-injected engine the response to detected pre-ignition is to retard spark timing. Is the same response used in DI/TGDI engines? Given the complex and precise nature of direct fuel injection I was wondering if changing engine timing was viable. Do DI manufacturers change injection timing or fuel mixture richness instead?

Note I'm not referring to LSPI, but pre-ignition as has existed since the invention of the internal combustion engine.

Thanks for any info.

 

[y_p_w]

I'd note that preignition isn't quite the same as detonation, although a higher octane rated fuel and/or retarding timing helps prevent both. Of course changing timing is viable. Even though it's far more complex than the days where a cap and rotor is slowed down, the computing power is far greater too.

I'm pretty sure it's all of the above used to address knock.