Torque Cars chat forums - View Single Post - Two stroke diesel: Build a simple ECU ??? Do-able, or not?

HDi fun · 08-04-2008, 08:16 PM

I'm lost now. The fuel pressure in a common rail diesel system is more or less constant. The pump itself is merely that, unlike the earlier systems where the pump itself controlled the timing of the injection as well. The timing and duration of the injection is controlled by the injector, which in turn is fired by electric current under computer control.

If there are no trigger pulses to the injector then it will never fire and fuel will be returned to the tank.

This is how common rail systems differ from previous systems. And it's a fundamental difference in operating principle, not just a refinement thereof.

08-04-2008, 08:16 PM	#33 (permalink)
HDi fun Moderator Torque Junkie Car: Peugeot 406 Join Date: Apr 2006 Location: SOUTH EAST Posts: 2,072	Re: Two stroke diesel: Build a simple ECU ??? Do-able, or not? I'm lost now. The fuel pressure in a common rail diesel system is more or less constant. The pump itself is merely that, unlike the earlier systems where the pump itself controlled the timing of the injection as well. The timing and duration of the injection is controlled by the injector, which in turn is fired by electric current under computer control. If there are no trigger pulses to the injector then it will never fire and fuel will be returned to the tank. This is how common rail systems differ from previous systems. And it's a fundamental difference in operating principle, not just a refinement thereof.