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'''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 [http://www.vems.hu/files/Fero/suzuki%20VVT/ 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: [http://www.vems.hu/files/Fero/suzuki%20VVT/v3.3_n002012-2011-04-14-16.56.39-factory-pt-vvt-off.triggerlog vvt_off.triggerlog], [http://www.vems.hu/files/Fero/suzuki%20VVT/v3.3_n002012-2011-04-14-17.04.40-factory-pt-vvt-off-on-off.triggerlog vvt_off_on_off.triggerlog] * Use Subaru config with Special SuzukiVVT trigger enabled * Set VVT measure pulse to 2 '''Tooth timing''' * Triggering pulse is always at the third pulse after the single missing tooth if only one camsync received from the last double missing tooth http://www.vems.hu/files/Fero/suzuki%20VVT/suzuki_vvt.PNG '''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 2 ---- '''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.
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