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Senior Member
Join Date: Jan 2001
Posts: 539
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OK, let me try and respond to some of the issues raised. All of you should realize and re-look at the date of the "Coors Vision." I have been thinking about this, and only this for weeks so I too have thought of most of the potential problems. In my work there are no such things as problems.....only opportunities.
* has any of you ever heard of scope creep! Geesh, you guys mention F1, BMW, Ferrari, Porsche, etc. I am doing this with no money and no engineering background and resources. Sure I would love to let the shifting ecu talk to the Haltech and blip the throttle on downshifts, etc. but I think its better to start off simple at first and then build on it. KISS. * Who in the world said I was trying to be novel or think of something new! Obviously, this is not a new idea. My approach is slightly different because I plan to do this for nothing compared to the other systems. So using Ferrari parts is not for me either. * My post indicated I already have a G50 so putting in an Audi or Tiptronic is not what I am after. * I do think the downshifts will be the most challenging. I will be able to blip the throttle just like I do now. I foresee it taking a certain nack to drive it but that's OK with me. The car is a Beast and I'm not trying to tame it so a woman can drive it to the store. The system will be able to be adjusted to pause in nuetral before going into gear. The worst case scenario is that the trans shifts not any quicker than stock. However it would be very consistant and it would be pretty cool by just hitting a button. Woops, scratch that. The worst case is the thing doesn't work at all and I have to admit it doesn't work and I will only be able to say "I tried". Not too bad of a situation to me  * there will be NO shifter to put a piece of tape on or watch move. It will be gone. All the shifting will be done by the system. * the system will have a LED display showing what the current gear is. It will only update the display after the change has been made so I will know if it didn't make the change for whatever reason. For sure, the logic control and programming of the system is key. It's a good thing I have all of 10 minutes experience huh? The only thing I am still wrestling with is the type of actuators. I am steering towrds pnematics. Steppers and servos are much more costly, are larger for the force I need. I might look into hydralics. I need to research 12v pumps for both air and fluids. |
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12-06-2001, 06:54 PM
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Registered
Join Date: Mar 2000
Location: Irvine, CA
Posts: 1,200
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Wow, that is pretty ambitious!
To those that say why not just put in a Tiptronic, what he is proposing is nothing like a tiptronic. A Tip is basicallyjust an old fashioned automatic with a gimmick way of shifting it. Still got the torque converter, etc. I don't know anything about the true sequential gearboxes, like Ferrari and BMW have. But, I do know that Ferrari spent many years (and millions, undoubtedly) trying to get it right. BMW, same thing with their SMG sequential. Lots of difficulties getting it right, in fact, BMW refused to send it over to the US until they fully worked it out (the SMG II). You might have some advantages over them since your system does not have to be a "consumer" system (you know, be totally idiot proof, safeguards left and right, etc.). |
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12-06-2001, 07:10 PM
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Registered
Join Date: Jun 2001
Location: Sweden
Posts: 5,911
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Check out if you can use hydraulics using engine oil pressure...that way you could get rid of pneumatics and stuff...
OTH...2-3 bar engine-oil pressure @ idle might not be enough for actuators...Stepper motors are usable too but are often too slow...or heavy. Electromagnets maybe? I think your project is completly doable...adding one more actuator on clutch-cable won't be too complicated either. And when i think little more....adding a actuator that would momentarily "blip" throttle isn't too complicated too :-) Actually I did those pneumatic PIC-operated systems back in the university... Ahh...i wish you lived near me :-) My CAFD project? Converting CIS -> EFI just for fun of it...it might even do some good ;=)
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Thank you for your time, |
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12-07-2001, 05:45 AM
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Registered
Join Date: May 2001
Location: simi valley, ca, usa
Posts: 533
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Mark, don't listen to the "why don't you" guys!
I for one would get awfully tired of shifting a Tip (my fingertips ache just thinking about it!). How about a Voice Activation/Recognition System? "Second please ... third please ... fourth please ... fifth please ... standby ...." I like it. Now we're talkin' (pun intended  )!
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Brian '73RS (almost...) '84 944 beater |
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12-07-2001, 10:12 AM
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