Recent Posts

1

General Discussion / Re: Stm32f105 ARM based dauther board for vems for canbus

« Last post by Kamuto on October 19, 2017, 06:15:38 pm »

so, how's dbw? got it working?

2

Software / Re: nice features to have "request"

« Last post by Sprocket on October 19, 2017, 06:13:08 pm »

One more:
Cylinder separated ignition trim. For example: cyl 5 is more likely to knock, you can retard that cyl by 2deg overall (or add rpm and kpa limitiation for the retarding), and add 2 more to the whole ignition table, that would result in more power.

Cylinder separated spark delay under base settings?...............................

 
Yeah, but you can give advance in it? I mean it shoud go negative then, but vt says out of range... Also RPM and kPa limitation isn't there.

if the table is called delay table, so maybe it is retarding ignition with positive value in table?

I think you misread what i wrote. I'm ok with the ign retard, but what if i want to add more advance to specific cylinders? The value should be negative then.
Although, it is possible, by retarding all other cyl's, and adding more advance to the main ign map, but that's not too elegant.

Your original post suggests that you want to retard one or two cylinders away from knock so that you can tune the ignition table for MBT on the rest of the cylinders. You can achieve this with the Cylinder separated spark delay, all be it without your KPA or RPM thresholds.

Goal posts are moving 

3

Software / Re: nice features to have "request"

« Last post by Sam8888 on October 19, 2017, 05:44:47 pm »

One more:
Cylinder separated ignition trim. For example: cyl 5 is more likely to knock, you can retard that cyl by 2deg overall (or add rpm and kpa limitiation for the retarding), and add 2 more to the whole ignition table, that would result in more power.

Cylinder separated spark delay under base settings?...............................

 
Yeah, but you can give advance in it? I mean it shoud go negative then, but vt says out of range... Also RPM and kPa limitation isn't there.

if the table is called delay table, so maybe it is retarding ignition with positive value in table?

I think you misread what i wrote. I'm ok with the ign retard, but what if i want to add more advance to specific cylinders? The value should be negative then.
Although, it is possible, by retarding all other cyl's, and adding more advance to the main ign map, but that's not too elegant.

4

Software / Re: nice features to have "request"

« Last post by Kamuto on October 19, 2017, 04:08:05 am »

One more:
Cylinder separated ignition trim. For example: cyl 5 is more likely to knock, you can retard that cyl by 2deg overall (or add rpm and kpa limitiation for the retarding), and add 2 more to the whole ignition table, that would result in more power.

Cylinder separated spark delay under base settings?...............................

 
Yeah, but you can give advance in it? I mean it shoud go negative then, but vt says out of range... Also RPM and kPa limitation isn't there.

if the table is called delay table, so maybe it is retarding ignition with positive value in table?

5

Software / Re: nice features to have "request"

« Last post by Sam8888 on October 18, 2017, 01:42:16 pm »

One more:
Cylinder separated ignition trim. For example: cyl 5 is more likely to knock, you can retard that cyl by 2deg overall (or add rpm and kpa limitiation for the retarding), and add 2 more to the whole ignition table, that would result in more power.

Cylinder separated spark delay under base settings?...............................

Yeah, but you can give advance in it? I mean it shoud go negative then, but vt says out of range... Also RPM and kPa limitation isn't there.

6

Configuration / Re: Strange ignition output behaviour on bench testing

« Last post by GintsK on October 18, 2017, 12:16:31 pm »

Yes zero PW, sorry! You misunderstood something. You have to get voltage between EC18-7  and   EC18-9  as close to zero as possible. Usually it is done in Hungary quite well. So I guess you have wrong setting now.

1) Do not knew about brain, but even if light would be enough to see timing mark method is not correct. At cranking engine speed fluctuates a lot and you will get erroneous value.
2) No experience. Too embarrassing.
3) No. Start with 2ms and use oscilloscope. Usually output stage limit current when maximum reached. Go little beyond that.
4) Do not feed solenoid + wire to VEMS inputs because of high flyback peak. Better use additional small relay driven from that for switching clean ground signal for VEMS input.
5) From here http://www.robietherobot.com/storm/mapsensor.htm  Range 95.  Offset 5 or -5 - not sure, try. Normal and 2 are OK.

7

Software / Re: nice features to have "request"

« Last post by Sprocket on October 18, 2017, 03:02:56 am »

One more:
Cylinder separated ignition trim. For example: cyl 5 is more likely to knock, you can retard that cyl by 2deg overall (or add rpm and kpa limitiation for the retarding), and add 2 more to the whole ignition table, that would result in more power.

Cylinder separated spark delay under base settings?...............................

8

Software / Re: nice features to have "request"

« Last post by Sam8888 on October 17, 2017, 11:39:11 pm »

One more:
Cylinder separated ignition trim. For example: cyl 5 is more likely to knock, you can retard that cyl by 2deg overall (or add rpm and kpa limitiation for the retarding), and add 2 more to the whole ignition table, that would result in more power.

9

Configuration / Re: Strange ignition output behaviour on bench testing

« Last post by msh on October 17, 2017, 08:11:46 pm »

104 as zero DC. Just unusual.

Pump Zero PW? It was 103, then I did 2x100 ohm resistor test, found just 4.0 volts and tried to get 4.1, as written in that tutorial I was reading - 105 gave no change, when I wanted to set 115, VemsTune protested about that, so I left 105, as I also found in different tutorial that I should get voltage between 3.9 and 4.1, not exactly 4.1 - the other WB02 controller value wasn't touched as I measured required 0.45v and 0.9v


Today I fixed the problems you pointed at - all the warnings was fixed, CLT/MAP table was set to 0 degrees the whole range and ignition outputs was set to 4 identical ones - I'm pleased to say that it fixed both problems, serial communication now is stable and LED connected to ignition output just flashes according to how I turn the dizzy

Anyway, I've a few questions and I don't want to start a new thread:

1) do I have to, upon ignition angle testing with LED, take into account "coil charge time" [time how long LED shines], or temporary set to 0,1 ms , or my brain will " see"  the timing mark at the moment when LED will go dark?
2) how 1-wire immo works - after setting correct numbers and enabling it, off it goes? Can I see somewhere, without enabling it, that VEMS sees that I put ibutton in it's socket, and identifies it?
3) Maybe you know correct charge time for mk3 golf ignition coil? Knowing that it's rather fragile, I would like not to risk with it.
4) In the future I'll need config switching, as I'll go for a LPG with separate control unit, for it I plan to use separate analog input, which has voltage divider attached to it. When config switching will be enabled, will it be like "config A - 0v, config B - some voltage", or more like "config A - 0v, config B - voltage above x volts" ? I presume that config switch switches between two complete configurations?
5) I'm using GM 1 bar MAP sensor, as found in weak and small engined 90's opels, but I cannot find exact kPa specification for it - do I have correctly guessed it to be 102 kPa, or it should be more? VemsTune is highlighting in red settings "MAP Range Unit - normal" and "Table kPa Unit - 2", is there anything wrong?

10

Configuration / Re: vems ecu crashing and requiring reset with bootloader

« Last post by diesel des on October 16, 2017, 06:00:17 pm »

The ECU needed a new main board. Car is now running fine. Thanks guys.