Alfa Romeo Engine AR32301

[acab]

Hello, i buy used engine Alfa Romeo AR32301 with some troubles, and want to rebuild it and strart with rusEFI.

Its have:

• inductive sensor on crankshaft and positioned on 90*TDC
• hall sensor in camshaft
• 4 usual bosch high resistant injectors
• 4 usual bosch coil on plug with additional spark per coil: 4 usual sparks and 4 small sparks
• 1 knock sensor
• 1 tps
• 1 maf sensor with air temperature
• 1 coolant temperature sensor
• and other shit

Lets play and make one more turbocharged engine with rufEFI controlla)

[AndreyB]

Sounds like a plan!

Have you made any progress on acquiring the components for the board? Have you tried http://ru.mouser.com/ - they have most of the stuff needed.

[puff]

what are other live turbocharged engines controlled with rusefi?
could you please explain what are those double spark systems?

[kb1gtt]

Sounds cool, let us know if you have any questions or if we can help some how.

[acab]

[kb1gtt]

2 wires to each CNP seems to indicate you need an ignitor upstream. Do you know if that CNP has an integrated ignitor, or do you need something up stream like a J701? See example schematic found here http://rusefi.com/wiki/index.php?title=Manual:Hardware#J701_NEON_engine_schematics

[puff]

something complicated. what is the purpose of these double plugs? (or just double coils?)

[abecedarian]

2 wires to each CNP seems to indicate you need an ignitor upstream. Do you know if that CNP has an integrated ignitor, or do you need something up stream like a J701? See example schematic found here http://rusefi.com/wiki/index.php?title=Manual:Hardware#J701_NEON_engine_schematics

Not necessarily though. If the coil grounds to the mount plate, only 12v and trigger wires are required.
GM LSx coils have 4 wires because of how they have the logic circuits implemented, as in no internal 12v-5v regulator.

something complicated. what is the purpose of these double plugs? (or just double coils?)

Not double plugs. One plug is to the coil, the other is the lead to the spark plug.

[kb1gtt]

CNP = Coil Near Plug. There are 4 coils, 4 spark plugs. I'm not sure why they have such long lead though, generally if your going to get your coil packs hot, you want the shortest leads you can reasonably get. However those high voltage wires are much shorter than they are when you have a Distributor.

I agree, there may or may not be a third wire via the engine frame as GND, as well there may or many not be an ignition in the coil. I'm curious if it will need an ignitor, of if it runs off a low power signal.

[acab]

Thats from repair manual for that engine wiring.

The control unit M10 also controls coils A30 via control signals (earth) to the coil primary windings, while the second winding sends a pulse to the spark plugs: from pins 16, 31, 30 and 14 of connector B of M10 for cylinders 1, 2, 3 and 4 respectively for cylinders 2-3.

The primary windings of coils A30 receive a power supply to enable opening from the main relay.

[AndreyB]

Have you made any progress on acquiring the components for the board? Have you tried http://ru.mouser.com/ - they have most of the stuff needed.

...

[kb1gtt]

In that graphic it appears it's just 4 basic coil, with a primary and secondary winding, no ignitor. Do you have any thoughts about an ignitor? If not would you consider using the J701? As posted above we have used that on a Neon engine. If you are considering the J701, I can offer to draft a pencil schematic to help show the system schematic which would show how it's wired. Also take note, for those wires on the primary, you want to plan for at least 10A of current and 600V or more insulation. The 10A of current is common during the dwell part of ignition event, and voltage spikes up to 600V-ish are common during the spark event, as the spark voltage will kick back through the coil.

[acab]

If i remember - its simple COP with additional coils. Work via +12 and GND

[Nobody]

Cool little engine...

It's actually a twin spark (2 spark plugs per cylinder) engine, one in center of combustion chamber and other offset to side in "squish" area. It' looks like it started as a typical 4-valve per cylinder head that couldn't pass emissions, so they added in a spark plug to get more complete burn/combustion (this is speculation on my part)...

It is a COP (coil on plug) and CNP (coil near plug) all at once. The timing is staggered so both plugs do not fire at once, so coil acts as wasted spark every second time it fires.

This is a first for me, never seen one like this, knew they existed, but the coil arrangement is very unique.