InputTrigger related page for MembersPage/MarcellGal/EngineSwap
The output side is explained on MembersPage/MarcellGal/EngineSwap/Ignition
- 60-2 factory made crankwheel on pulley (from Opel Astra X16SZR), diameter=140mm mounted on the Daewoo engine (pulley drives air conditioner and alternator)
- VR sensor (resistance=480 ohm)
- VR sensor mounted with appr 40..43 mm, so it sees the missing tooth earlier than it would from the factory VR sensor location. This is a side effect of the mounting: the reason for the adapter was to make the sensor align (better) with the crankwheel.
- The factory mark was 4 teeth (24 degrees) off because of the Daewoo-Opel hybrid. We checked TDC through an open sparkplug hole (much after the engine had been started :-)
- engine rotates clockwise when viewed from the timing belt side (To avoid missunderstandings engine rotation described as looking at the end opposite to the output shaft). This is verified in 5th gear, moving the car a bit. So the engine rotates in the same direction as the wheels in gear 1..5.
Signal quality and polarity - VR fixed
After hooking up LEDs and notebook soundcard it became obvious that trigger syncron is lost soon after it would fire up (ign and inj output not activated for some periods).
Even though MegaTune logs revealed that there were no resets, GND5 turned out to be very weak (and clearly interfered with GND through internal protecting diodes that I used between GND and GND5). 3 powerful 1mm2 wires used for GND5 fixed it.
With mde40 logging (see InputTrigger/TriggerLog) it became obvious immediately that trigger signal was reversed. Instead of one 3x long pulse (60-2 wheel) there were 2 longer teeth (appr. 1.5 .. 2x long). We connected it according to the documentation (neglecting the result of simple but effective "hammer" test). Confusingly, usually there was trigger signal, it was just unstable and lotsof wheel-errs showed up (eg. on LCD).
Runout - InputTrigger/RunOut
I could reproduce the runout very easily on the table (I got a flue anyway incar testing ain't work). I hooked up LEDs to injection and ignition outputs.
- Pull up a free injector FET output with 270 Ohm resitor to 12V. Position 4 in my h[0] table activates the given channel.
- connect the output to primary trigger input through a 10nF capacitor
- act_wot_channel=40
After playing with mstBA (60-2 toothwheel OutputTrigger) and msp01 .. msp06 (mostly msq00) I noticed that ignition and injection LEDs flash unevenly. There are full crankrotations left out. This is typical for loss of inputtrigger signal. I hooked up a soundcard to check signal with audacity and saw that signal amplitude is significantly lower for the first tooth after missing tooth. So I inverted the stimulator output from 40 => 80:
- act_wot_channel=C0
so after the missing tooth it starts with a (neglected) rising pulse, than comes the (used) falling pulse.
I could discover the same pattern in the sound recording of the real VR log, and LED flashing in the car behaved in a similar way.
I'll have to patch the LM1815 circuit with the resistor that lowers the adaptive threshold (or jumper to nonadaptive mode).
Position - solved
I didn't have time to hook up and log the factory ECM, but words of mouth say that Bosch wheels are factory-mounted so the first tooth after the missing tooth comes at 60 crankdeg before TDC of cyl1 (power-stroke). I doubt it, only based on the autronic setup notes I recived.
Please confirm or deny this - or provide links
On my engine it seems to be that way. But the starting values I recived when planning my Autronic install indicates that the first tooth is 90-130 deg BTDC. Acording to the tips you usually ignore 6-11 teeth after the 'first tooth' before you find the 60d BTDC tooth.
The normal way to do this is to find TDC, then turn the engine backwards to the tooth closest to 60deg BTDC. Now you continue turning the engine backwards while counting teeth until you find the fist tooth after the missing ones.
The way it was done
After a good start from photos (see below), I just simply sweeped through the tdc_delay using the directly attached keyboard. It's very easy to do so :-) Apparently best results:
- trigger_tooth=10
- with ign_tdcdelay=70 (56 degrees)
- and cranking advance=32 (12.5 degrees)
- [pic]. See [more pics]) On the pictures it looks like rather 4 teeth (6 crankdegrees/teeth) rather than 5 or 6. That means new trigger sees missing tooth only 24 crankdegrees earlier than the factory position would.
- cyl1 (and cyl4) TDC is believed to happen when the white mark is almost opposite the VR sensor location
![[pic]](http://cell.dyndns.ws/efi/engine/Daewoo/smallparts/VR/VR_Sensor_Adapter.jpg){kind=link}
Here is a few lines from the config of the volvo 960 Emil installed:
this is a much older car, but still a stock bosch 60-2 wheel.. Drilled into the flywheel
- trigger_tooth=03 (18 degrees)
- ign_tdcdelay=7C (62 degrees)
Is it possible that the missing tooth .. TDC phase in that setup has nothing to do with the factory installs ? --No, it was not altered. /Emil
See also