S54 dual VANOS VVT

[AbatelliCristian]

I insert 10 but sync lost is always active .... now I disable check engine
tomorrow I test the car in the dyno....

[jsmcortina]

Weird. I've bench tested and the "SYNC Fault" seems to be behaving as expected.

James

[AbatelliCristian]

in the car when start I have 1-2 lostsynck during cranck... in the normal run I don't have lost sync and I have disable the sync-loss check. But flag is always active.
If I disable all chack engine, I don't have problem.

[AbatelliCristian]

I understand the problem... attach photo... this configuration NO generate error.., but if I disable only sync check generate the error....

[AbatelliCristian]

today I not finish the tune for small meccanichal problem... I will finish monday.
At the moment is all ok. The engine is strong

[ragepower]

Hi james, my engine, s62b50, uses the same vanos system but for v8, so it is needed the double of the outputs.

This week I hope to get start the engine with MS, only need to solve some problems and to do the cam protection circuits.

About the high-side driver for vanos solenoids and vanos oil pressure accumulator solenoid (100hz), the TIP125 is enough? Can I use the vtec control circuit from diyautotune website ( http://www.diyautotune.com/diypnp/image ... alt_lg.gif )?

EDIT: Is possible to double the outputs to control this vanos?

[AbatelliCristian]

today after 3 hour in the dyno, I have 346hp.... I love vvt system ahahahah
thanks James, ken and all staff....

[ragepower]

Good to know, AbatelliCristian!

Now I hope that James could do the same to a S62.

[Mario]

I am also working with a S54 engine. I loaded the Alpha8 code today and did some testing. I can get the Intake to respond but the Exhaust is still not moving. Also, even though the Advance/Retard is greyed it causes issues. I am not sure how they should be set, both retard or both advance? I also have a persistent "Cam Fault" indicator but I cannot track down the culprit.

VVT Logging with ports.msl

Last logs no exhaust movment.msq

engine log.1 S54.csv

AbatelliCristian, is there a reason you aren't moving your exhaust cam?

[AbatelliCristian]

Intake and exhaust advanced in this engine.
I have see your msq, but you not select the output for all solenoid.

For fault cam you select the pool level.

I recommend to reverse the sensor because with 6 tooth for cam input in sequential, the engine same times no start. In semi-sequentia start well.

The exaust is importanto for torque. If you retard it, you have torque at low-mid rpm, if you advance it, you have torque at high rpm.

[jsmcortina]

Here's your "engine log" viewed in MegaLogviewer.

s54enginelog.png

From this information, I believe that the six tooth cam wheel needs to be used as the primary cam input, with "poll level" and tooth#13 (maybe?) as the check tooth.
That's where I've put the "poll" arrows. On one phase of the engine that cam signal is high, on the next it is low. This is not possible on the EDIT: 6 tooth wheel.

James

[AbatelliCristian]

Problem:
in this idraulic system, when the engine is shutoff and in the table vvt intake you have changed the degress, the engine cam, remain in the last position and this change the poll level" tooth#.

[AbatelliCristian]

is possible open the second solenoid when ecu is on? a simple impulse for 1-2sec.. this discharge the circuit and eliminate the problem

[jsmcortina]

Does the cam _really_ move that much? On all other systems I've seen, there is enough leeway in the signal that the phase can still be identified whether the cam is in the full advance or full retard position.

However, the suggestion to discharge the hydraulics makes good sense also. Do you still have access to the test car? I'm guessing that the customer has taken it away by now.

James

[AbatelliCristian]

I'm guessing that the customer has taken it away by now.

yes you have guessed, I don't have the car in this moment... I waiting for test in circuit.

In other system (bmw 320-325-328-M3 s65) when I shutoff the engine, the idraulic system discharge automatically because the single solenoid return in zero position, and when the engine is restarting, the vvt work at 0 position.

In s54 if you shutdown with "x" degress in vvt, it remain at this value for all time and when you restart the engine angle is at "x" position and no 0, because the idraulic system remain in pressure (charge and discharge solenoid is off and oil no discharged).


I don't understand well the poll level...

That's where I've put the "poll" arrows. On one phase of the engine that cam signal is high, on the next it is low. This is not possible on the 8 tooth wheel.

I see, but on one phase of the engine that cam signal il low and in the next is low (green line is 6 tooth).
On one phase of the engine that cam signal is high, on the next it is low in yellow line (8 tooth).

[jsmcortina]

I see, but on one phase of the engine that cam signal il low and in the next is low (green line is 6 tooth).
On one phase of the engine that cam signal is high, on the next it is low in yellow line (8 tooth).

I confused the issue by saying the wrong cam wheel tooth count.
YES, the yellow one is the cam to use.

James

[jsmcortina]

To (attempt) to support the S62 engine, I've changed things around a little for the complementary VVT outputs. Instead of re-using the outputs on channels 3+4, I've added additional settings for the second outputs. The _reported_ VVT duty will be different now too, with one duty instead of two split duties. Assuming there aren't any errors, the operation should remain the same once the outputs are re-configured.

Screenshot-VVT Settings.png

James

[AbatelliCristian]

good idea James...
very good work...!!!!

[Mario]

Intake and exhaust advanced in this engine.
I have see your msq, but you not select the output for all solenoid.

Can you explain why the outputs are not on? I have them set as:
Cam1(sol1) - High Current Out 2
Cam2(Sol3) - PWM Out 2
Cam3(sol2) - PWM/ Idle Out 1
Cam4(sol4) - High Current Out 1

Here's your "engine log" viewed in MegaLogviewer.
From this information, I believe that the six tooth cam wheel needs to be used as the primary cam input, with "poll level" and tooth#13 (maybe?) as the check tooth.
That's where I've put the "poll" arrows. On one phase of the engine that cam signal is high, on the next it is low. This is not possible on the EDIT: 6 tooth wheel.

Ok, so I need to reconfigure to make the Exhaust cam to Cam1. Then change cam trigger to Poll level and try tooth 13. Got it!

Also, would it be possible to use a variant of the new S62 code with the second output, and have Cam3 and Cam4 grayed out. I think this could make things less confusing in this situation. That way the pair of outputs is consolidated to the single cam it is controlling.

The car I am working on is only about 15 minutes away. I can get back to it during the first of the week.

Thank you both!

[AbatelliCristian]

this is your msq.
All the output is off.