Quote:
Originally Posted by dcb
hmm, the hyundai GDI has a sparkplug?!? Guess this needs some more homework, gasoline doesn't like to autoignite in a nice way maybe?
|
Actually gasoline will auto ignite under very narrow parameters and is the objective of the HCCI developments. In doing so at super high mixture ratios, like a diesel, the emissions have become so low that after treatment may become unnecessary. This has always been the "holy grail" of combustion engine technology to actually make the engine run clean without having to clean the exhaust after combustion.
Interesting thread when I am still learning something.
Also the new Skyactiv Mazda engine is running compression ratios at 14 to 1. Apparently they are using the valve timing to effective vary the actual compression ratio with some type of atkinization strategy.
I'll check the wifes DGI Sorento tonight, to make sure it has plugs, but I am 99% certain it does and they are always providing spark. but the 1% is still possible.
regards
Mech