Maximum amperage of diesel injectors.

[mudnut]

Yep. I've had a search. I haven't got the CRD manual downloaded as the GU manual caused all sorts of problems with my puter.

[the evil twin]

Have you had a look in the workshop manual? It should at least give you the resistance of the injector.

0.25 +/- 0.05 Ohms IE between 0.2 to 0.3 Ohms

[mudnut]

Thanks ET. So thats for The CRD?

12Volt /.2 ohms = 60 amps. That'll do as a reference point for now.

Factor in back EMF it will be a bit less.

Multiply it by 4 then you have a huge current drain that must be supplied by the alternator.

[the evil twin]

Thanks ET. So thats for The CRD?

12Volt /.2 ohms = 60 amps. That'll do as a reference point for now.

Factor in back EMF it will be a bit less.

Multiply it by 4 then you have a huge current drain that must be supplied by the alternator.

Good thinking 'cept the Injectors don't run on 12 volts, Cobber.
They run on somewhere between 100 to maybe 400 volts (Flex suggests 300 Volts peak which would make sense).

They are also not the only component in the circuit.
That means it would be like measuring the resistance of the headlamp switch at 0.2 Ohms and thinking the headlamp circuit pulls 60 amps.

From the very limited data on the Bosch website they will be limited to around 15 amps but whatever it is that would be max current at max duration.

[Yendor]

Looking at the wire size at the injectors my guess is around 20 amps.

I'm unable to see any working voltage on the injectors and the online photos I found don't help that much either.

You could try contacting some of the aftermarket chip mobs, maybe they could tell you.

[mudnut]

They are a hefty unit so I will source heavy duty gear. Do it once, do it right.

[Flex]

mudnut how did you go with this project?

[mudnut]

I have been collecting bits and pieces
for this project.

My computer is in a very poor state at

the moment, so I have been struggling

to do anything.

I did however find a circuit that had

some decent sized capacitors near

the output end of the circuit.

This indicates to me that it may be

used to produce a high voltage signal.

I have also found a circuit that can

accommodate a hefty mosfet for 12v.

The local electronics store is closing

down so I need to find a good online

supplier too.

[Flex]

Try these two:
RS Components: http://au.rs-online.com/
Element14: http://au.element14.com/

Both have overnight shipping. RS is free and element14 is free if your order is over $45

[mudnut]

Thanks. I'll have to shelve it for

the moment. But I definitely will go ahead

with it. There are plenty off the shelf units

on EBay, if you really need to have one.

I think I will get the plugs and leads from a

shop in Mt Gambier or Warnambool as it

will be easier to get the right type.