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Old 06-05-2012, 10:07 AM
hotrod2448 hotrod2448 is offline
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Location: NC
Join Date: Jun 2007
Posts: 1,246
Mein Auto: F80 M3, F10 535i
Originally Posted by TDIwyse View Post
One of the plots didn't upload . . . this is the time of the main injection pulse * the injection angel (start of injection). Kind of a way to show the impact of increased duration and timing. Since the JBD fools the ECM into making more pressure, for those situations where the JBD is utilized, for the same injector opening duration, more fuel goes in due to the rail being at higher pressures.
So being new to diesel tuning, I'm assuming injection angle references crank position and by beginning injection earlier is not only adding fuel by increasing duty cycle but, it is also similar to adding ignition timing in a gasoline motor, right?

My next question is do we know if the ECU has some type of detonation protection that retards injection timing like a gas car would pull ignition timing if something were to see ridiculously high loads or something go wrong?
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