Hi
There is no stable synchronization during cranking - it can hit TDC correctly, it can miss by 90-180 degrees - full random.
If it hits TDC then the engine starts and runs great.
ECU alphax-4chan, Honda motorcycle four-stroke engine.
Crank - 36 tooth VR.
Cam - 1 tooth VR.
Additional capacitors are installed in both VR modules, adjusting the VR sensor threshold does not help.
https://rusefi.com/online/view.php?msq=1477
The 36 tooth trigger is not original, I also have the original 12 tooth trigger - same problems. I have logs for him too if needed.
Honda SC35 trigger sync issues
Honda SC35 trigger sync issues
- Attachments
-
- 2023-05-29_17.46.03 36-1 100tps.csv
- (118.23 KiB) Downloaded 110 times
-
- 2023-05-29_17.46.03 36-1 0tps.csv
- (76.99 KiB) Downloaded 122 times
-
- 2023-05-29_17.46.48 36-1 0tps+100tps.rar
- (419.54 KiB) Downloaded 118 times
- AndreyB
- Site Admin
- Posts: 14360
- Joined: Wed Aug 28, 2013 1:28 am
- Location: Jersey City
- Github Username: rusefillc
- Slack: Andrey B
Re: Honda SC35 trigger sync issues
instant RPM is definitely telling us _something_
I think I can see uneven duration of primary rise counter? Something is not right with hardware outside or inside of ECU At the moment we do not log tooth ratios for wheels without a synchronization point like this 36/0 so we are a bit more blind for such special wheels.
I think I can see uneven duration of primary rise counter? Something is not right with hardware outside or inside of ECU At the moment we do not log tooth ratios for wheels without a synchronization point like this 36/0 so we are a bit more blind for such special wheels.
- Attachments
-
- image.png (61.74 KiB) Viewed 7701 times
Very limited telepathic abilities - please post logs & tunes where appropriate - http://rusefi.com/s/questions
Always looking for C/C++/Java/PHP developers! Please help us see https://rusefi.com/s/howtocontribute
Always looking for C/C++/Java/PHP developers! Please help us see https://rusefi.com/s/howtocontribute
Re: Honda SC35 trigger sync issues
Here is a log with a 12-teeth crank and 1-tooth cam wheels.
From a factory, this motor comes with the 12-teeth crankshaft and a 3-teeth camshaft wheels (but it’s not available now).
Does it makes sense to remove 1 tooth from a 36-teeth wheel and turn on/off a camshaft sensor with the 1-tooth wheel?
From a factory, this motor comes with the 12-teeth crankshaft and a 3-teeth camshaft wheels (but it’s not available now).
Does it makes sense to remove 1 tooth from a 36-teeth wheel and turn on/off a camshaft sensor with the 1-tooth wheel?
- Attachments
-
- 020190404_125744.jpg (59.6 KiB) Viewed 7695 times
-
- 2023-05-29 12-1 0tps+100tps.rar
- 12-1 log
- (404.39 KiB) Downloaded 119 times