Question about Vr sensor

[Ludotech]

Hello everybody,

I'm still learning english so please, be lenient

I have started my v3 board with ms II and I want to control ignition with an EDIS-4 system (the engine has 4 cylinders). But first, I think I'm going to just control injection and later the ignition. So I'll need two VR sensors? One for the injection and later another VR sensor for the EDIS(Because the EDIS ECU just sent a PIP signal to MS)? The engine (suzuki 1300 cc with sequential injection and distributorless ignition) has already a VR, can I pick up the signal of this VR sensor to indicate the position of the crankshaft to megasquirt II?
I'm a litle confused, so if you could help me...

[Bernard Fife]

Ludotech,

For controlling the injection only, you can trigger off the ignition coils using the tach circuit schematics near the bottom of the page here: http://www.megasquirt.info/ms2/EDIS.htm, so you don't need another VR sensor.

You might be able to share the VR signal instead of triggering from the coils, but it might cause problems - you would have to try it to know for sure.

For EDIS, the VR sensor goes to the EDIS module, not MegaSquirt, and the module sends a square wave signal to MegaSquirt (so you use the Hall sensor input circuit).

Lance.

[Ludotech]

Lance,

I forgot to say that I'm going to install a bank injection(4cylinders).
The stock ignition is: two ignition coils (like EDIS-4) with wasted spark.

So if I understand, the signal (PIP) sent by the EDIS modul to megasquirt is not useable for the injection?

I don't really understand: The engine has a VR sensor with a classic sinusoidal signal( there is a space on the crankwhell where there is no teeth to indicate the TDC, I don't already know how much teeth it has but I will measure the signal in the week with an oscilloscope). So, if I assemble the variable reluctor circuit, can I use this VR sensor for only injection with stock ignition before installing EDIS?

I saw the schematics in the bottom of the page here: http://www.megasquirt.info/ms2/EDIS.htm but is it for the dash tachometer or it can go to the hall/optical/point input circuit?

Sorry, it's difficult for me because it's not my language but i try to understand before doing anything bad.

Thanks a lot for your responses.

[Bernard Fife]

So, if I assemble the variable reluctor circuit, can I use this VR sensor for only injection with stock ignition before installing EDIS?

Ludotech,

Only with missing tooth code, which is still in beta testing for MS-II (bt not too far away from release, I suspect).

I saw the schematics in the bottom of the page here: http://www.megasquirt.info/ms2/EDIS.htm but is it for the dash tachometer or it can go to the hall/optical/point input circuit?

You can use it for either if you are doing injection control only (no ignition timing control). It doesn't say use it for the Megasquirt trigger signal, because normally if you have EDIS you'll be using the PIP signal for MegaSquirt.

If you can use the PIP signal, then that ought to work, but there might be issues sharing it with another computer (that is, the one that is controlling ignition).

BTW, your English is fine, much better than many native English speakers for whom capitalization and punctuation seems a lost art!

Lance.

[jsmcortina]

So if I understand, the signal (PIP) sent by the EDIS modul to megasquirt is not useable for the injection?

The PIP signal is an excellent tach source for the Megasquirt whether running injection only or injection and timing control.

James

[Ludotech]

Lance

Only with missing tooth code, which is still in beta testing for MS-II (bt not too far away from release, I suspect).

Oh, I didn't know it!! So the VR sensor is not useable for the moment without the missing tooth code? Is this the case with MSns EDIS?

James

The PIP signal is an excellent tach source for the Megasquirt whether running injection only or injection and timing control.

I don't understand: What does that mean? I can use the PIP for both injection and ignition?


Lance

BTW, your English is fine, much better than many native English speakers for whom capitalization and punctuation seems a lost art!

Thank you, there is a lot of dictionnary around me but sometimes it's very difficult.

I have to say that I want to use Megasquirt to control an engine at school(I'm a student in automotive section), if this is a success in may 2006, I'll get my diploma and I want this diploma so What's the easiest solution for me? MSns with EDIS? MS II with EDIS(I bought MS II) or anything else? Sorry, I have read the site of megasquirt all the day and I'm very confused today.

Thanks to everybody !

[Bernard Fife]

Ludotech,

To use the EDIS VR sensor output directly with MegaSquirt, you need missing tooth code. You DON'T need the missing tooth code if you are using the EDIS module (with either MS-I or MS-II), though.

However, if you want to experiment with the missing tooth code, let me know, we'll make it happen.

I think James is saying if you have EDIS set-up, and are using something else for the ignition timing control (like an OEM ECU), you can split the PIP signal and use it both for that ECU and MegaSquirt (without needing missing tooth code).

However, if this were mine - I'd go directly to both fuel and ignition control with MS-II and EDIS, since you have all the compoennts, and this is a fairly well tested combination. Then you wire the VR sensor to the EDIS module and the PIP to MegaSquirt (and the SAW) and you are done.

Sounds like a fun project you are working on!

Lance.

[Ludotech]

However, if you want to experiment with the missing tooth code, let me know, we'll make it happen.

OK, perhaps in a few weeks!

However, if this were mine - I'd go directly to both fuel and ignition control with MS-II and EDIS, since you have all the compoennts, and this is a fairly well tested combination. Then you wire the VR sensor to the EDIS module and the PIP to MegaSquirt (and the SAW) and you are done.

Ok I didn't undertand but it's clear now: I assemble the hall/optical/point input circuit and only wire the VR sensor to the EDIS module and the PIP to Megaquirt. You're right, I'm going to control both fuel and ignition with MS II and EDIS! I hope it will be a success!

Thanks a lot Lance, this forum is very nice!
THANKS!!!!!