New project for customer was started and we would like to order Vems, but we are not sure about some outputs.
Engine is BMW e46 inline 6 cylinder DOHC m54b30, 330i, Naturally aspirated with Dual Vanos head
Inputs which we need:
- Trigger1 = Hall 1x
- Trigger2 = Hall 1x
- Trigger3 = Hall 1x (for second cam because of Dual Vanos)
- MAT 1x
- CLT 1x
- TPS 1x
- WBO2 1x
- Knock 2x
- MAP = in ECU 115kPa 1x
Outputs which we need:
- 8x IGBT (only 6 in use for ign.)
- 6x High-Z outputs for injectors (injector's impedance is 14-16 ohm)
- Idle stepper motor (3 wires), Bosch 3 wire PWM
- fuel pump output
- tachometer output (RPM)
- and THE BIGGEST PROBLEM Dual Vanos solenoids outputs
- VANOS is PWM type single solnoid per valve NFET controlled
On engine there are 2 solenoids (1 for each cam) when solenoid is without current, spring hold it and one way for oil to vanos is open. If solenoids are with current, another way for oil is opened and Vanos valve move to another position. Solenoids are command with PWM.
Function scheme of system is shown at this link: http://s229.photobucket.com/user/megarath2000/media/BMW/Vanosexploded.jpg.html
We need to know which ECU output can drive the Vanos solenoids. Somewhere in wiki i read that we need lowZ injector outputs and also remove the flyback diode from solenoids, but we are not sure. If yes, how we can combine the lowZ outputs and HighZ injectors?
- Any free injector, ignition or stepper output can drive the VANOS solenoids; my recommendation would be to use the 2 free ignition outputs.
- m54b30 VANOS solenoids do not have internal flyback diodes, no need to remove.
- I do believe the M54 VANOS is not PWM controlled, they are Frequency modulated at around ~200Hz acordning to BMW documentation.
- I have tried to run them on all possible Hz and duty controlled, in VEMS but they do not respond. At a sertain DC (Around 75%) they just travel to end position.
- I have tried with both Injector fet and IGBT, they respond the same way. Have anyone run these with good result? Please tell me how!
- I am running a m54b25 using the same solenoids and control type, both working axis without problems, configured as follows:
- NFET controlled, INJ FET or IGBT will work, with flyback diode 1n4007 over valve (from rescuekit)
- Control type: NON-PID
- Output type: Single PWM
- Near pwm range: 8 deg
- PWM period: 375 Hz
- Also the biggest problem is not the Vanos, its the CANbus controlled dash and Electronic trottle. /Thorbjörn Engdahl
- The m54 electronic throttle is not CAN controlled