Members Page/Gergely Lezsak/Stage One

MembersPage/GergelyLezsak/StageOne (2005-07-03 22:52:56)

Stage 1 - Controlling injection

Due to signal split difficulties, I skipped Stage 0, and start to wire the car with this stage.

Harness

I have disassembled a harness from junkyard, not exactly the same as the original one, but it's from a '98 BMW, connectors seems usable, and have a lot of double-colored wires, relay connectors, fuse houses, etc. [Injector cables] can be used completely.

Note:

for 3-pole AMP connectors I've found two types, [Code I] and [Code II]. They are not interchangeable.
for 2-pole AMP connectors I've seen Code I only.

I had difficulties to live both (motronic and genboard) harnesses the same time, since there's no room to wire so much more things from engine bay to the glovebox (small hole on firewall, sealing fits). I removed sealing temporarily, this gives much larger hole in the firewall, but wires have a direct contact to somewhat sharp metal.

Since motronic has to go either in Stage 2, I decided to move the whole motronic harness and ecu to engine bay temporarily.

Genboard harness will go to the glovebox. I've checked that both motronic and econoseal connectors can be pushed over on the hole in firewall.

One small issue : there's a [3 pole connector] from main motronic conn. to instrument panel which is vital to work. It contains instrument panel signal (fuel consumption gauge), tacho signal, and ignition switch signal (to motronic!). I had connected ign.sw. signal, car is now running with motronic in engine bay.

Wiring is almost done.

Mechanical part

WBO2 had to be installed to exhaust. Done
EGT has to be installed to exhaust. (Maybe later)
Split pressure hose to [ map sensor]. Done.

Electrical part

Need to split VR signal -maybe with a series cond to catch from motronic's in-port directly?
Maybe motronic will be offended at disconnected sensor and inj. cables. We may need to simulate something? (I don't care about "check engine lights" or something, but it must work for ignition, idle air, etc.)
Explore IAC control. Did some measurements, check at MembersPage/GergelyLezsak/IdleControl

Software'

Don't know much about it.

For ignition I need to know 60-2 wheel's trigger position relative to TDC. Don't know it yet.

Crankshaft angular speed/position ie. VR Sensor -> 60-2 wheel info...

Measured data:

60-2 wheel diameter 215 mm, tooth width 4.5 mm, space between adjacent tooths 7 mm.

Sensor / TDC position is 165 mm from 1st teeth rising edge.

TDC is 15nth teeth falling edge = approximately 88 degrees after 1st teeth rising edge.

Same mathematically...

diam 215 mm x pi -> 675.44 mm

675.44 mm / 360 degrees = 1.876229 mm/deg.

165 mm / 1.876229 mm/deg = 87.94 degrees.

15 x 4.5 mm + 14 x 7 mm = 67.5 mm + 98 mm = 165.5 mm

165.5 mm / 1.876229 mm/deg = 88.2 degrees.

TDC = 88 degrees after 1st tooth rising edge.