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DELETED (Inactive)
2 Posts |
 Posted - Jul 15 2003 : 7:27:17 PM
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I have bought a 2 litre turbo diesel engine out of a Peugeot car it is fairly new and is completly run on electronics. Its high pressure common rail direct injected. The injectors or electronic so they need to be fired at pricisel the right time and for the right lenght of time.
a brief discription..
INPUTS:
-The crank pully has a smooth disk with roughly 60 tiny magnetic strips two of these indicate TDC.
-The cam pully has three plates welded to the inside of the pully which trigger the sensor.
-There is a fuel temprature sensor, which probaly is not to important.
-There is a fuel presure sensor onthe common rail with fuel presures up 20,000 psi (1350bar)!
-Inducted air temprature by means of a simple thyristor.
-Inducted air flow .
-Oil temp.
-Water temp
-The speedometer is electronic probable simular to the crank pully speed sensor.
OUTPUTS:
- Four indavidualy fired bosch injectors
- Priming pump on the high preasure of solinoid type (not a motor) which needs pulses of current to work.
Now to my question.... I need to make this engine run some how and I cant use the original electronics as the are full of immoblizers and saftey things. I was thinking of using a computer with a sound card that has four speaker outputs and get the computer to triger some sort of electronic switch to activate the injector. The mic on the sound card can also be used for picking up the rev sensoron the crank.
What switchs could be used?
Anybody know of a yoke to plug into the USB port to read simple thyristors and other anolog inpts?
has any body any sugestions?
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Aaron Cake
Administrator
Canada
6718 Posts |
Posted - Jul 16 2003 : 08:56:58 AM
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You're going to need something alot more real time then a PC. Have you looked for aftermarket diesel EFI systems? There must be at least one out there, as I can think of at least 10 for gas systems just off the top of my head.
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n/a
DELETED (Inactive)
2 Posts |
Posted - Jul 16 2003 : 2:38:26 PM
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Can u give me some names of ECUs for petrols so I could maybe read up on them they might even work.
As for real time I know most car ecu are bout 8Mhz or something like that. And if my max RPM is 5000 the thats 83.3333 Revs per secound and 4 stroke engine is down to say 40 injections a secound so thats 40Hz the sound coming from the crank sensor will be 30,000hz this may pos a problem. But I could modife this to suit me if needs be.
But may be a petrol Multi point Injection ECU might work.
What do u think.
btw I am in Eire just so u know
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Aaron Cake
Administrator
Canada
6718 Posts |
Posted - Jul 17 2003 : 09:14:06 AM
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The problem is that a PC is not a realtime device. It has interrupts which can stop the processor at any time. Your car's ECU is a very simple computer, with a slow yet dedicated processor. Just runs in a loop, with no interruptions. You MIGHT get away with a PC if you build an O/S from scratch...
Gasoline EMS systems: Haltec, Megasquirt, MOTEC, Microtech (my favourite), Electromotive. Should get you started. The Haltec is the most "popular", which may even have a program for a diesel.
I am not familiar enough with diesels (I work in rotary engines) so I can't make a judgement as to what would work.
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Turbo Diesel
