I have a 1986 Skoda Rapid that will get the new engine from Skoda Fabia and the GenBoard. I purchased this engine with whole accessories like injectors, electric throttle body, ignition module mounted over plugs, MAP and IAT, but without ECU. I'm interested in electronics and engine management..
Engine:
It is 4 cylinder 1397 ccm OHV, distributerless wastedspark ignition.
Ignition out
Original VW module. It have two logic level inputs for 1-4 and 2-3 cylinder, without dwell control. It takes spark at falling edge. It need less than 10 mA input current, so I dont need ignition IGBTs.
The common solution is to use 74HC259 output, with 510 Ohm (270 Ohm..1kOhm). See [assembled controller specs in webshop] for which channels are traditionally used: check the 6+2 configuration: (namely channel3=EC36pin36 and channel5=EC36pin12 are logic-level) but you can use any, of course.
Primary Trigger
VR, I connected JP2 with JP7 and shorted SJ6
Secondary Trigger: Hall on cam. HOW CAN I CONFIG JUMPERS FOR IT? Connect JP5 with JP20?
A bit more info is needed, eg. board version, serial number. See
- GenBoard/Manual/InputTrigger
- GenBoard/Manual/InputTriggerHardWare
- InputTrigger
- http://vems.hu/www.vems.co.uk/VEMS/InputTrigger.html
Throttle
Electronically controlled with DC motor. I want use it only because I purchased it with engine. If someone want, I can exchange it for standard throttle. I'm mot fully decided for use it or exchange.
This throttle body is originally mounted on this engine. It have TPS sensor. My configuration is like on this page
http://www.egr.msu.edu/autoweb/Class/Proj_2001/throttle/project.htm.
Nice ! What is the throttle type exactly ? Maybe photo ?
So my plans are to make separate unit that will read TPS and Pedal Position then compare values, make some adjustment and calculate PWM for H-bridge. Initial position of throttle is little open so I think that for normal iddle it need little closing.
It is very reasonable to put
- RPM into the equation: at low RPM, apply nonlinear pedal position=>throttle angle. This enhances drivability (the only reason for electronic throttle, right?)
- and possibly MAP feedback would be nice too
I understand that you need a several-ampere H-bridge driver (as an addon hardware, since the stepper output can only drive 1A, or max 2A if 2 channels are connected parallel on both input and output), but what else would be needed on that device? It's better to put anything else into genboard firmware.