VEMS traction control - but so much more

[cliffb75]

I've just been looking at this

http://www.vems.hu/wiki/index.php?page=TractionControlArm

 

When I heard about a VEMS traction control, I assumed it would be just that - a traction control box using differential wheel speed an nothing more.

But whats being talked about here is the basis for a full stability control system. With 4 wheel speeds, 3 axis g sensors, steering and braking inputs and ABS solenoid outputs, plus a CAN link to the EMS to request reduced torque, this could be a really good piece of kit!

Whats the latest news on this Rob - are they going to actualy make it with the features for full stability control? When? How much? I want one !!!!!

Quite excited about this.....

[ex-ctr]

im also very intrested in this, how far from a working unit is this

[rob@vems.co.uk]

The man who knows is David dnb: he's the man with the plan.

[dnb]

I think I started a bit of a monster with this...   As far as I know (I've not done anything on VEMS since xmas) the TCS is still in the algorithm and concept stage, certainly not much further.

My prototype is my TVR with Ford triggers fitted to the hubs (they're Ford parts anyway) and whatever accelerometers I have laying around.  Currently a 1D unit from my Impreza ABS.  The Genboard doesn't have the necessary inputs for a proper go at TCS, hence the talk of a separate module and CAN bus etc...

My belief is that you can actually do a fair amount with just wheel sensors and a couple of interesting curve fitting algorithms, but once you involve the additional inputs like steering angle and acceleration, you have more states in your state space to play with, so you can make less assumptions...

Just like the radar stuff I play with 9 to 5...

[bmw345i]

any news about VEMS traction control arm? Is it in progress or postponed? Any dates?
Will it work with GenBoard v3.3?

VEMS fan

[dnb]

It'll work with 3.3 via the launch control input.  ie triggering the rev limiter when TCS action is required.

Other than that, nothing to report - too many radar problems taking my time.

[bmw345i]

Do you think traction control arm will be ready fo market 2008 or later?

[rob@vems.co.uk]

I think that even if the software and hardware was in place that tuning the system would be impossibly difficult.

[dnb]

Not impossible.  Merely "quite difficult"

TBH, there's not going to be that many tuning options - probably just an amout of slip before TCS involvement, plus config for sensors etc.

[bmw345i]

Tatech,Motec,Autronic have traction control for years already. VEMS should also have one.
Still whats you prediction is it coming out 2008 or later?

[rob@vems.co.uk]

While I agree that TC would be nice to have I'm not in the business of making predictions as to when products will be ready for market.

Unfortunately no one from the Dev team uses the forum unless I specifically direct a tightly scoped question to them, so your requests will not been seen by those who'd be developing the product   The best way is to use the Wiki for that, although I wouldn't be too hopeful of a response.

[mr_g]

I think I started a bit of a monster with this...   As far as I know (I've not done anything on VEMS since xmas) the TCS is still in the algorithm and concept stage, certainly not much further.

Can I be a part of your development team, pleaaaaaaaaaaaaase? 

I have designed the PCB for a simple TC (only counting wheels speed), need to write some software for it, and wonder how would I present this information to the VEMS so it would lower the boost. PCB is based on ATmega128...



BTW, PCB is 4x20 LCD size and matches up it pins. So Idea was to put the LCD also on TC, so it would calculate and display all the information like 0-60-100 time, 0-1/4-1/2 mile time, etc, fuel consumption, trip times, etc...

[rob@vems.co.uk]

You'd need to talk to someone like Sambas about this.
Personally I'd keep your project your own, and discuss the interface between the two systems.

[mr_g]

OK. Interface would be just fine if they provide me some information about it. I haven't found anything about it in wiki...

[rob@vems.co.uk]

There is no interface, you'd need to negotiate the interface contract with them... Don't hold out much hope though - theres not that many options for inputs anymore