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

HDi fun · 06-04-2008, 10:38 PM

capacitive discharge will not be anywhere near enough to fire the injector. The fuel rail pressure will dominate and the injector won't open at all.

No electrolytic cap will be able to discharge fast enough for this application. Electrolytic caps are little more than small polarised primary cells.

What you're looking to do is control big current at big levels of amplitude. and do it very precisely.

You can assume that the injector's electrical behaviour when firing is tantamount to a short circuit. For a very short time.

You're already in the digital domain.

Class H amplifiers --- anyone want to lead????

06-04-2008, 10:38 PM	#27 (permalink)
HDi fun Moderator The Torque Meister Car: Peugeot 406 Join Date: Apr 2006 Location: SOUTH EAST Posts: 1,522	Re: Two stroke diesel: Build a simple ECU ??? Do-able, or not? capacitive discharge will not be anywhere near enough to fire the injector. The fuel rail pressure will dominate and the injector won't open at all. No electrolytic cap will be able to discharge fast enough for this application. Electrolytic caps are little more than small polarised primary cells. What you're looking to do is control big current at big levels of amplitude. and do it very precisely. You can assume that the injector's electrical behaviour when firing is tantamount to a short circuit. For a very short time. You're already in the digital domain. Class H amplifiers --- anyone want to lead????