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This page is a compilation of information I have found regarding the operations of single variable vanos using two solenoids as used by BMW in the S50B30 engine as well as the most comprehensive single file I have found regarding Vanos found online. ---- '''V3 recommendations''' To control '''both intake and exhaust cam''' with the BMW Vanos mode (not the suzuki-PWM mode) 2 solenoids for each (4 outputs total), 1.1.93 fw required, see [http://vems.hu/vt/help/v3/v3_camshaft_angle_control.html VT help] * since 6 inj + 6 ign might be used up on a BMW I6, the following seems reasonable: * 2 injector outputs for intake cam * 2 ign outputs for exhaust cam * 2 stepper outputs for BMW double-iac * 1 stepper output for fuel pump relay * 1 stepper output for boost solenoid '''A further question on variable vanos. Is there a possibility for a multiplexer that could have more outputs and possibly control quad vanos? This will then have covered the V8, V10 and V12 engines and just leaves pattern recognition to be done to operate those engines''' ---- Here is a very comprehensive pdf file I found on some chinese document website. It contains information on all of the vanos systems bmw offers. http://rapidshare.com/files/454023393/bmw_mfp-pi_vanos_en.pdf [http://www.beisansystems.com/procedures/double_vanos_rattle_procedure.htm another insight] into Vanos. Some pics in german of the operations of the vanos system and the amount of travel on the inlet cam. I don´t understand german so somebody else will have to make sense of these images and the information. http://wp1016621.wp027.webpack.hosteurope.de/fotost/f01126/21.jpg http://wp1016621.wp027.webpack.hosteurope.de/fotost/f01126/22.jpg http://wp1016621.wp027.webpack.hosteurope.de/fotost/f01126/23.jpg http://wp1016621.wp027.webpack.hosteurope.de/fotost/f01126/24.jpg http://wp1016621.wp027.webpack.hosteurope.de/fotost/f01126/25.jpg http://wp1016621.wp027.webpack.hosteurope.de/fotost/f01126/26.jpg http://wp1016621.wp027.webpack.hosteurope.de/fotost/f01126/27.jpg http://wp1016621.wp027.webpack.hosteurope.de/fotost/f01126/28.jpg Some old info: MembersPage/JasonVoytilla/BMW/Vanos -------- Added link to original bin file from the vanos controller http://www.vems.hu/files/vanosinfo/BMW%20e36%20M3%203.0%20VANOS%20controller.txt This is a bin file, map is located at 0x2800 and is 16*16, axis at 0x2810 and 0x2820 However if somebody wants to spend time decompiling this then everything about the control should be optainable. Code is only about 8k out of the 32kb chip. -------- It seems that the tooth gears have equally spaced 8 teeth. which means each tooth and gap make up 45degrees out of 360. The alteration is max 42degrees of crank angle, while each tooth and gap is therefor 90degrees crank angle. I´d imagine the rising edge of one gear(exhaust) to be leading against the adjustable gear (intake). So difference between both cams can be monitored 8times a cycle. I.e measuring the rising edge on the exhaust and note the crank angle, then wait for the intake cam rising edge and note the crank angle. It seems the solenoids work in simple fashion, Open Solenoid 1 and the intake advances, Open the other and it retards. The '''cam can´t move when both solenoids are closed so it stays in a fixed position.''' The engine has 4 sensors Crank sensor 60-2 Cam sensor TDC , one point (this is then not on the S50B32) Intake cam sensor , Exhaust cam sensor , I´ll measure the solenoids resistance and report. Fero measured 4 Ohm.
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