Hi all
I would like to know if you guys use and are confident in the Vems knock control system
I find it very difficult to setup , atleast getting the right info from it ,
Show when and react to knock
Any usefull tips to get to 100procent trust it ?
Thanks
Skassa
Quote from: Denmark on May 17, 2015, 06:12:04 PM
Hi all
I would like to know if you guys use and are confident in the Vems knock control system
I find it very difficult to setup , atleast getting the right info from it ,
Show when and react to knock
Any usefull tips to get to 100procent trust it ?
Thanks
Skassa
it works really nice :)
Really pleased with it, could never hear knock before ECU adjusted ignition advance. I used to run it in my Volvo B230 with gasoline, no use now with ethanol fuel.
Quote from: Denmark on May 17, 2015, 06:12:04 PM
I find it very difficult to setup , atleast getting the right info from it ,
Hello Skassa,
Could you elbarorate a bit bit on where you found the difficulties in setting it up ? Feedback like this will be very useful for us to improve/adjust the knock help page: http://vems.hu/vt/help/v3/v3_knock_control.html
Best regards, Dave
Hmm
I Will try again on the next Car i have in , and follow the setup for it step by step
I thourght it was overly active and showing knock when there was No knock
I use the oe subaru knocksensor that is signal wire only , i dont know if thats a problem and i Will have to change to a 2 pole sensor ?
Thanks
Skassa
Quote from: VEMS on May 18, 2015, 09:01:41 AM
Could you elbarorate a bit bit on where you found the difficulties in setting it up ? Feedback like this will be very useful for us to improve/adjust the knock help page: http://vems.hu/vt/help/v3/v3_knock_control.html
I confess I had some difficulties in reading the documentation probably because I was expecting a shorter text and the usual terms and chapters for signal analysis matters (eg. LabView), per example in this case: Data acquisition, Data conditioning, Detection, Control.
In the first one, I may have put things related to"Window" and "Band pass" and related VT outputs.
In the 2nd, "integrator", "channel gain", "channel calibration" (instead of "Knock Sampling Base Reading Calibration" )
in the 3rd "detection strategies", "1. Noise knock threshold ","2. Mean knock value"
In the 4th "ignition control", "enrichment control" (instead of " Knock sampling action settings")
The menu items may also need to be reorganized.
These are just remarks, the main point is that the Knock function works efficiently.
Hello All,
I have some suggestions too.
E.G. Now it is clear, the knock ref can upscale knock noise table.
I need to use tis, because my engine generates lot of noise about redline.
The knock noise ref says 1600. But:
- The individual knock channels maxxed out with 1024
- If I use knock noise ref as a multiplier (to cover over 790 in this situation I use 250%) the resolution of sensing divided by 2,5 isn't it?
This things generated some additional question, modification possibility:
- What is the maximum engine noise, what VEMS can handle (2048?)
- It would be very useful, if we can set in noise table the 'real' noise (above 797) value, and the individual channels could show values above 1024.
Regards: Attila
Quote from: Attiska on April 22, 2018, 09:11:38 AM
Hello All,
I have some suggestions too.
E.G. Now it is clear, the knock ref can upscale knock noise table.
I need to use tis, because my engine generates lot of noise about redline.
The knock noise ref says 1600. But:
- The individual knock channels maxxed out with 1024
- If I use knock noise ref as a multiplier (to cover over 790 in this situation I use 250%) the resolution of sensing divided by 2,5 isn't it?
This things generated some additional question, modification possibility:
- What is the maximum engine noise, what VEMS can handle (2048?)
- It would be very useful, if we can set in noise table the 'real' noise (above 797) value, and the individual channels could show values above 1024.
Regards: Attila
just lower your gain on channels..
Hi Kamuto,
If I do this, I cannot achieve the knock reference average on light load (cruising at 2000-2500 rpm)
Attila