Invent Jetronic ignition control for Mercedes

VulpesIgnis

I have been toying around with the software and noticed there is an Ignition control box, is there any info on how to use it? Can it be used to replace the original EZL/TZS on Mercedes engines?
It gives me the impression that it can be used to control the distributor coil just like the TZS does.

~ DL

JHM

It is new feature. Well tested on Audi.
I see it's time to write a manual for it.

It can control ignition instead of EZL.
But you have to replace original VR crankshaft sensor with Hall-type.

If you're curious, I can make instructions for Mercedes with your help.

VulpesIgnis

JHM

Excellent! Im up for helping write a manual.

~ DL

Alviss

VulpesIgnis Hello. Did You managed to install spark control system from Invent to Your MB?

JHM

To feed the RPM signal directly to the Invent ECU, and from Invent to the new ignition coil:

replace crankshaft sensor at the flywheel with the Hall-effect
replace stock coil with the new ignition module
connect hall sensor signal to the DH wire

New crankshaft sensor:
A6429050000 / 9.0654 FACET / 37984 FEBI

New ignition coil:
VAG 357905115 (credits to Manuel Steinhagen)

Dwell time: 5ms
Active level: 5V

Set custom engine settings in the ECU:

Those options are the same for both M102 and M103

Fix for hardware prior to v2.5

We figured out that EMUL wire is unreliable for driving a recommended coil, and fixed the hardware in revision 2.5
For older hardware, you need to use an external MOSFET to drive the coil.
When using this schematic, you need to set the Coil active level to 0V

VulpesIgnis

Excellent.
Which wire from the ECU should I use to control the coil with?
Is the voltage input for the hall effect 5V or 12V?

JHM

Hall sensor should be powered with +12v
ECU use EMUL wire to steer the coil

VulpesIgnis

JHM
Hall effect wire signal should be DH, right?

JHM

VulpesIgnis
Yes.
AN should be disconnected

VulpesIgnis

When installing ignition control in an M103 Mercedes engine do I have to swap the 3 teeth flywheel for a 60-2 teeth flywheel?

JHM

VulpesIgnis
No, it's intended to work with 3-teeth flywheel.

VulpesIgnis

Would it work with a 2-teeth flywheel form an M102?

JHM

VulpesIgnis
Yes, 3-teeth for 6cyl, 2-teeth for 4cyl Mercedes

VulpesIgnis

Perfect, how much can I advance my spark using this method? I will be trying to advance it to around 35 degrees max

JHM

VulpesIgnis
You're free to set any angles in range 0 - 50

Inzzz

Hey. Does this support coil on plug system ?

JHM

Inzzz
no, this kit is designed as close to stock as possible.

VulpesIgnis

Sorry to revive an old thread, how do I feed RPM signal back into the cluster?

JHM

VulpesIgnis
I guess that feeding hall sensor signal will do the trick

kpraz

VulpesIgnis Did you get your m103 to spark with this Hall effect sensor and Coil? waiting for someone to actually have it running

DocAlfa

VulpesIgnis hello did the cluster work with the new hall signal?
thanks
Søren

VulpesIgnis

kpraz I am waiting for a mate of mine to install an M103 in a W460 to go ahead and install the spark control system, I will keep everyone tuned and i'll try to write a guide aswell!