Suzuki Valve control
Test project for intake valve camshaft angle control. 1.3 / 1.6 Liter 4cyl engine used in Suzuki Swift, Ignis and other cars. Perhaps same trigger is used in other engines (Toyota ?) as well.
Fero uploaded the documents [here]
Important information:
- PWM signal for valve-adjust solenoid should be around 240 Hz
- higher duty advances the intake cam (as expected)
- Fero did some testing with the intake-control-hydraulic system, and drift was almost zero at 45% duty. But it never stabilizes, so feedback is essential.
- the camsync CMP signal is at the flywheel end of the cylinder head, HALL type with 3 pin connector
- Ground - measure in orig harness
- mid-pin sectrig HALL signal
- third pin (closest to sensor body): +5V HALL-supply voltage
Trigger PATTERN
Primary trigger is same 36-2-2-2 as InputTrigger/SubaruThirtySixMinusTwoMinusTwoMinusTwo (but HALL)
- however, sectrig is different from the subaru 36-2-2-2-. A bit complex, and somewhat pain to implement in a generic firmware (not a specific just to this engine), but it's at least smarter then the subaru
- unlike the subaru, the suzuki cam seems to support proper running (timing from less than 140 crankdegrees) with camsync only (obviously without VVTI, of course: with intake cam fully retarded)
Secondary trigger
- Firmware support from fw 1.1.92, tested with measured triggerlogs: [vvt_off.triggerlog], [vvt_off_on_off.triggerlog]
- Use Subaru config with Special SuzukiVVT trigger enabled
- Set VVT measure pulse to 3
Tooth timing
- Triggering pulse is always at the fourth pulse after the single missing tooth if only one camsync received from the last double missing tooth
VVT measurement
- VVT time measured from the triggering camsync pulse ( detailed in Tooth timing above)
- To the configured (Base setup menu / Secondary trigger settings dialog/ VVTI measure pulse) measure pulse after the single missing
- Recomended setting is 3
test-setup at Budapest University of Technology (and "Economics")
http://www.bme.hu/ the engine + shaft dyno located in the Jendrassik lab, 50m from the university's nuclear reactor.
It is a sponsored ECU v3.3 serialnr 2012
- was installed around 2008, running with 1.1.27
- guys installed a 18-1 crankwheel instead of using the factory (VR?) sensor. Camsync was not used
- Marcell upgraded firmware (actually to 1.1.89) so that sectrig log can be captured
- vemstune was very helpful with the upgrade, offered the auto-saved 1.1.27 config and upgraded to 1.1.89. Validate warned about the values it could not upgrade (eg. tooth_width2 was unused in 1.1.27). Setting tooth width=20 degrees fixed the warning
We'll test VVTI with this 18-1 primary trigger first.
TODO: upload scope data and triggerlogs.