Simon
|
| posted on 31/1/12 at 12:56 AM |
|
|
Diesel ECU's info
Been surfing the net this evening, and as toy car looks to be sold so I can get on with my extension, my thoughts have naturally started to turn to
the next project in 18 months time.
Now, being a bit of a diesel fan (convert since I got my bus!), but put off by the complexities of can busses etc and the difficulties of making a
modern diesel run (see dinosaurjuice and others comments in various threads ), I looked into aftermarket diesel ecu's, and came up with the
following:
http://www.specialist-components.co.uk/engineering/diesel-engine-management/
Now, they ain't cheap - or even close to sensibly priced, but who knows, maybe some competition (someone have a word with Dave Walker please!!)
will arrive in the next year or two to drive down prices
Cheers
ATB
Simon
|
|
|
|
|
coyoteboy
|
| posted on 31/1/12 at 03:11 AM |
|
|
There's no technical reason this can't be done in a megasquirt-esque way (not with a megasquirt, obviously) - the hardware behind it would
be relatively similar, however I think the DIY diesel tuning world is a lot smaller and a lot less experienced than the petrol tuners world. This is
why people can still demand huge prices for custom ECUs - I doubt many would know exactly how to tune a diesel, on the surface the lack of spark
control seems a blessing, until you then realise the compression ignition control is even more of a beast to tame - sequential, super-high resolution
injection code is needed that does multiple injections per cycle and how many folk realise a CR uses pilot injections to initiate burn quietly then
follows it with a secondary injection that provides the main oomph, the fact that there's no throttle to control things means you can fairly
quickly end up with a runaway engine if you get a few settings wrong etc.
Still. It would be a nice challenge if I saw a future for it, but I really don't - so many OEM ECU's are crackable it's a bit
pointless currently.
|
|
|
ashg
|
| posted on 31/1/12 at 09:16 AM |
|
|
i reckon you could do it with an ms3 now the source code has been released. it would require some extra driver circuits to fire the injectors etc.
and you can get the injection accuracy by freeing up some processing power through not having an ignition table and a few code changes. then you will
need a bit of extra circuitry to read in and control the fuel pressure, with a bit of code to control it. if you can program and have a basic
knowledge of electronics it shouldn't really anywhere near impossible.
at the end of the day the basic jist of any ecu is take a signal process it then output something. the tuning once the ecu is working is the hard part
Anything With Tits or Wheels Will cost you MONEY!!
Haynes Roadster (Finished)
Exocet (Finished & Sold)
New Project (Started)
|
|
|
Neville Jones
|
| posted on 31/1/12 at 11:17 AM |
|
|
My son tells me that this HAS been done with Megasquirt, using the sequential injection mode. I think it's on one of the Landrover forums.
Cheers,
Nev.
|
|
|
coyoteboy
|
| posted on 31/1/12 at 11:56 AM |
|
|
You could run it "old school" with seq inj, but you couldn't get the nice quiet delights of two-stage injection with the stock MS
code. Plus you need the HV driver if your injectors are the ~80v type as the MS injector drivers are not isolated from the main 12v supply.
There's already code in there for fuel pressure monitoring, though I don't think it does anything with it and can't control it. But
it's not /that/ much of an undertaking and the processor is more than capable.
|
|
|
