Posted by David G on August 31, 2017 at 16:44:36 from (97.127.191.154):
We are working on putting fuel injection on a 4000 HP natural gas engine. Another company does the injection controls, and I control the engine and turbo. Temperature sensors were added on the intake right next to the valve, one of them started running hotter and hotter due to the leaking combustion gas. They did a scope on that cylinder and sure enough the valve was being cut. This might have been starting before the conversion, or caused by debris left in the cylinder due to new intake and parts, do not know.
These engines have a pre combustion chamber that replaces the old spark plug. It is interesting, because there is an injection controller for the pre chamber, and another for the main chamber. In my view you have two places that might not have the right mixture. I guess that they have an option that monitors the coils and looks at the plasma field to determine if the pre chamber is combusting correctly. The main chamber has a pressure transmitter.
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