Members Page/Jose L Cortes - VEMS wiki www.vems.hu

MembersPage/JoseLCortes (2005-05-19 06:44:17)

I have used motec on GSXR1000 last year in a team which I had worked in. Motec M-800 is great but it is expensive. Genboard seem to have same or superior hardware specifications.

Motorcycle racing aplication of Genboard

On the other hand, Megasquirt is not designed for racing use and it havenÂ´t some fuctions than are very usefull in racing:

Quick shifter - to shift up with full throttle. It is very simple method, if you are full throttle and you try to shift then you feel than lever is very hard and it is unable to move because torque make impossible gears to be un-engaged. If you make quick throttle closing movement then next gear will be quick engaged, but you have lost 0.5 full throttle seconds and some rider concentration. MembersPage/JoseLCortes/QuickShifterSensorsTypes

Lower gear power output reduction - The GSXR and motoGP bikes have a shift gear position sensor, In the lower gears the engine power output is decreased. By the time 6th gear is selected the engine realises its full potential. The natural way for controlling power would be drivebywire but stock motorbikes havenÂ´t it. Without drivebywire (==manual throttle), it can be done with ignition retard. Ways for controlling power:

Ignition retard

Gear...........1......2....3....4....5....6

ignition.....15.....10....5....0....0....0 Looks simple. (but I doubt it gives the desired power-cut without event-skipping or air-control; too much retard will have the destructive ALS exhaust-heating effect, without the turbo-spooling benefits that justify ALS).

injection..-20....-10...-5....0....0....0 (would be simple to implement, but this must be a bad joke, read about melting valves?)

DriveByWire or secondary butterfly.

GSXR have a secondary butterfly (servo controled) before main buterfly (manual handled). It is the correct way in GSXR but no other bikes have it, implementation would be exacty the same than drivebywire. [throttle_bodies]

event-skipping like F1 but very scandalous.

GSXR1000RK3 Engine Sensors Description

MembersPage/JoseLCortes/EngineSensorsDescription

old timing accuracy test (obsolete)

MembersPage/JoseLCortes/SimulatorExperience

Ignition timing accuracy test with Genboard_v3/Firmware2004-11-24_v11_2

MembersPage/JoseLCortes/IgnTimingAccuracy

My engine started with Genboard working in fully sequencial ignition (with COPÂ´s)!!!

MembersPage/JoseLCortes/FullySequencial

Motorcycle Engine eddy current dynamometer

We have instaled a motec to work with a gsxr600 engine, this engine have been installed on a engine dynamometer for long time to make a precise adjust work, and I want to test the genboard at the same time than motec ones.

My new dyno photos, The brake is a eddy current retarder from Telma, The engine is connected to the brake by chain drive with the chainwheel mounted over torque dumper.


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Adaptor PCB with stock Suzuki GSXR connectors

I prefer to build a PCB adaptor and use original connector, in this way, this ecu is plug and play in any efi suzuki engine.


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This adaptor have a conditioning circuit for original pick-ups (cam and crank) copied from original ecu (very small SMD and silicone packed).

IGBTÂ´s have been placed in this board because original genboard will be cuted to reduce dimensions.

My first testings

Last two weeks I have been building a test bench with a car engine, The reason is than I havenÂ´t GSXR engine, the team i was working for have broken, and i want to have a stable test bench to test anything without ask to anybody.

http://www.nmine.com/msavr/1st_start.htm

IÂ´m using GSXR COPS in wasted spark ,My objetive is to add a cam sensor and use it in fully sequencial.

IÂ´m going to continue trying to install a genboard in a motorbike, Now there are a posible project with yamaha R1 engines.

The R1 engine is here!


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Our mision is to install a Motec, but I hope to get install and test genboard in this engine, it is completely new engine, from a absolutely 0 km motobike!!!

My configuration questions

I have my engine running with fully sequencial ignition!!!, At the moment I have found one only minor problem, It seems to it mainly accurs with low battery. The first turn during crancking seems to apears strange firing sequence, the sequence is ign03, ign03, ign2 and ign1 (yes!!! ign03 are fired two times) and only one ignition is fired in correct cylinder!!! , With low battery it ocurrs continuously and engine donÂ´t start, with charged battery it occurs one only time and the next cycle the engine starts without problem (some times it makes a ugly explosions when start for intake or exhaust)

http://www.nmine.com/msavr/longcranking.txt

It looks like some of the current to the starter motor goes through the ground that is used for trigger. This is called "ground loop". Make sure to avoid ground loops:

disconnect the onboard bridge ("arch") between GND and GND5
connect all GND and GND5 ground pins with separate, sufficiently thick wires (0.75mm2 or above preferred) to a ground you call engine-ground (often at the battery).
shielded cable for trigger would be nice: the shield must be grounded on one end only !
the trigger ground connects to GND close to the EC36 connector (not close to the engine-ground, and especially not tapping GND5)

The fisrt cycle when I push start button appears a strange firing sequence (ign03, ign03, ign2 and ign1)

I have rewired my GND instalation to make it as I have read above, this fisrt sequence continue appearing. The engine used to start after intake explosion. When engine start, then it works OK, each cylinder are fired correctly and engine sound perfectly.

I have make another test, I have tested this fisrt sequence with my simulator, it continue appearing, only the fisrt sequence are incorrect.

This is my TriggerLog experiences:

http://www.nmine.com/msavr/200rpmsimulador.txt

http://www.nmine.com/msavr/200rpmsimulador2.txt

http://www.nmine.com/msavr/200rpmsimulador3.txt

Another stuff, When engine stall, sometimes one of ignition output reamins actived, it is very dangerous, in fact the plastic of one of my COPs have started to melt. I have connected 12v-coils to fuel pump relay to solve temporally it.

Jose L Cortes

joseluis_jlc@hotmail.com