In my mind it will work, after all the principles are the same, injector timing and duration.
Discuss
[Edited on 19/11/13 by NigeEss]
Is it feasible ? Assuming a common rail application.
In my mind it will work, after all the principles are the same, injector timing and duration.
Discuss
[Edited on 19/11/13 by NigeEss]
AFAIK, unless MS3 has changed it, megasquirt has no injection timing control? This makes it impossible to achieve diesel control, ESPECIALLY on a
commonrail where the injection timing is often 1 pilot injection followed by a second "full" injection.
Megasquirt does ignition timing and injects "whenever", or in sequential on the MS3 I think it has a "whenever, but approximately here
for each cyl". I'd have to check the manual.
This is because, on a petrol engine, injection timing is not particularly important, especially not at high load levels.
[Edited on 19/11/13 by coyoteboy]
ms2 and 3 have injection timing control but this is aimed at petrol users and im not even sure it would work on GDI's yet but its possible that
even gdi petrol and diesel comon rail is in some form of alpha or beta firmware.
best place to look and ask is on msextra.com
also if you have no luck with megasquirt i have seen diesel engine control ecu's out there in the market
IIRC, cant you select fuel type on megasquirt?
Megasquirt is not amywhere near fast enough for common rail diesel because fuel needs to be precisely injected at exact point btdc. On petrol sequential injection timing need only be done on the correct stroke and even then only at low/mid rpm. So in a word, no. thereorically you could use it on a rotary pump diesel to control the advance and fuel metering solanoids but all the calculations in tunerstudio are based on petrol and injectors so would need serious amounts of trial and error to even get it running.
source code for ms3 is available, the processor has scope to do it, nothing is impossible.
just google it and you will find lots of good stuff
[Edited on 19/11/13 by matt_gsxr]
quote:
Originally posted by ashg
source code for ms3 is available, the processor has scope to do it, nothing is impossible.
Thing with petrol injectors is they are quite slow. The time from valve open to closed is fast, much faster than injector opening time never mind the full cycle. So petrol injectors spend most of the time injecting against a closed valve and thats why theres no point trying to make MS do it quicker so wont be much use on a direct injection oil burner. Stick with the correct, supplied with the car, ECU.
A few fundamental issues would need to be sorted.
1st, common rail diesel solenoid type injectors are fired using around 80volts
and 2nd desired fuel quantity is controlled as much by rail pressure as injector timing.
P.s I'm a mechanic and I do a lot of common rail diagnostic work and understand the systems very well.
it should be able to cope. ms3 can do windowed knock detection now so its already shown that it is capable of doing the processing. as for 80v trigger thats easy to solve too. with regards to fuel rail pressure you can reassign the ignition control blocks to deal with that. its all possible its just a lot of work.
Yes all do-able, but as the pioneer it'll be a huge learning curve.
It would definitely be easier to get the existing engine management system to run stand alone and chip it to whatever is required.
quote:
Originally posted by DW100
Yes all do-able, but as the pioneer it'll be a huge learning curve.
It would definitely be easier to get the existing engine management system to run stand alone and chip it to whatever is required.
There is an aftermarket diesel ecu out there, but iirc, it's about £2500 
I'm sure if they made it £700, they'd sell loads !
ATB
Simon
quote:
source code for ms3 is available, the processor has scope to do it, nothing is impossible.