See also Trigger
To change your trigger settings, open TunerStudio, then go to "Setup" -> "Trigger".
The order of channels in the engine sniffer should match the order of channels on the bottom part of corresponding image.
If you also have a cam sensor somewhere, see VVT.
Note that if your timing wheel was originally set up to run with a Ford EDIS-4 based ignition, you need to set the Trigger->Trigger Angle Advance setting to 90 degrees, as the EDIS-4 wants the reference missing tooth at 90 degrees BTDC.
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If the trigger seems to spin backwards, change from Rising edge to Falling edge and vice versa in the trigger setup in TunerStudio. For more Info see this forum thread.
Bosch loves this shape, tons of German and GM vehicles use it.
Similar but different from "Custom 12/0":
- "Custom 12/0" synchronizes on any tooth relying on a distributor
- "12crank/24cam" is a special popular trigger which depends on a cam sensor for engine phase detection.
Honda K Exhaust Camshaft
Also used on some Mitsubishi like 4g18 4g93
See 36-2-2-2
Also Miata NC etc
TODO maybe make it a bit more straight, maybe it's good enough
GM/Daewoo Distributor F8CV
Also used on Renault 5
Might also be used on some Daihatsu, Nissan and Mazda RX8/MZR/Miata NC
Maybe broken? Probably broken?
Chrysler NGC 4 cylinder
Chrysler NGC 6 cylinder
For cam trigger support check Bosch Quick Start if it is the '2 wide gaps 2 small gaps' cam trigger wheel, some earlier models instead use a cam trigger wheel with 1 missing tooth which can simply use single tooth trigger.
Sovek, Saruman ignition blind type
A bit of a 60/2/2
Old Audi 5 cylinder: does not work, no priority to make it work - that one needs custom handling
A basic wheel - assumes equally spaced teeth with a number of missing teeth. Tuner studio allows up to 500 teeth with 500 missing - functional limits are not tested.
3 cylinder
4 cylinder
Crank
Cam
Does not seem to work on v6 at the moment :( 6g72 and/or 6g75? 3000gt?
For example 4B11 4G15 4G69
Same as 4G15
Could match 4A90 as well!
Use this cam trigger with special 3+0 symmetrical crank trigger.
QR25 crank
HR crank
QR/MR cam
VQ35 crank
VQ cam
VQ30
360 slot trigger is too weird, no plans to support it.
For historical reasons we support wrongfully wired 60-2
See also Universal True 60/2
2JZ would use global trigger offset 65
Use this with "Single Tooth First Half" VVT mode for cam input
Use skipped wheel for crank and "Toyota 3 Tooth" previously known as "VVT: 2JZ" for cam.
This one is pretty special - it has extra setting for position. At the moment this one is only adjustable on first cam.
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If you have an unknown or an unsupported trigger shape, once you've confirmed that trigger events are getting into the software (see Troubleshooting Trigger Input) you need to crank your engine while rusEFI Console is connected with the Engine Sniffer tab active.
With long enough cranking you should get a visual log of your trigger signal. That would give you some idea of what kind of trigger shape you have. Save an image and post it on the forum. It's recommended to remove the spark plugs while investigating trigger shape to make your cranking more even.
Once the preliminary shape of a new trigger is added into the rusEFI firmware based on the Engine Sniffer image, the second step is getting a more precise recording of the shape with exact angles. This is done with the spark plugs removed and the Sensor Sniffer mode set to TRIGGER. With long enough cranking a chart of the trigger shape will appear on the Sensor Sniffer tab and the console log file (see out/ folder next to the rusEFI console binaries) would contain the angles. Please post this log file on the forum for the developers to encode the new trigger shape into the software.
The trigger decoding cycle starts at the 'synchronization point' - that's the trigger fall or rise event which satisfies the 'synchronization gap' condition. Since the trigger synchronization point usually has nothing to do with top dead center #1 (TDC), we have a 'Trigger Angle Advance' parameter - that's the offset between synchronization point and TDC.
For example, with Trigger Angle Advance set to zero, TDC is set to the synchronization point, the green vertical line is the TDC mark:
Now the real TDC, with Trigger Angle Advance set to 175:
Note the different location of the green TDC line. Also note how all Injector #1 pulses have moved (Injector #3 is the lowest signal on these pictures) - that's because ignition and injection are scheduled based on the TDC point.
While running, ignition is controlled by the ignition timing map. Ignition dwell is controlled by dwell time curve.
While cranking, you can set angle-based ignition in TunerStudio instead of timing map & dwell based ignition. In angle-based mode, dwell is defined in crankshaft angle duration and timing is constant.
See also 'trigger decoding' in Doxygen.
Dev note: unit_tests executable produces triggers.txt file - gen_trigger_images.bat reads triggers.txt and produces these .png files.