beaver34
|
| posted on 13/8/13 at 08:34 PM |
|
|
Gear shift ecu
After some help please,
A friend of mine races a evo 6, it has a sequential box. He is in a wheel chair so no foot controls.
He has made a button on the wheel and uses a mouth switch to operate a air ram to shift gear, by having a tank in the boot.
Problem is he struggles to shift gear when turning and we would like to fit a disk kind of setup to the wheel that you can change gear at any angle,
is there and shift ecu that stop you shifting below a set rpm? So you cannot miss shift and kill the engine
Also any ideas for shifting the other way, we have tried a lot but not 100% happy with any
Thanks a lot
|
|
|
|
|
theprisioner
|
| posted on 13/8/13 at 09:42 PM |
|
|
A PIC (Peripheral Interface Chip) chip. These are basically programmable 8 pin 8 bit computers. Some of the pins can be designated input some output.
You get various versions of them and you can basically make them do anything you want provided you can programme them, which is not that difficult. If
I can do it anybody can. I used one in my kit see:
http://www.alastair-reynolds.pwp.blueyonder.co.uk/fuelsystemlinearizer/index.htm
The key to all these problems is writing it down in terms that an engineer can understand. You would have to produce a document accurately describing
all the inputs what they do in all circumstances and then what you expected output from the computer to be.
It may sound like a very trivial thing to do, I assure you it is not. That is why the first plane with GPS autopilot turned upside down when it flew
over the equator. Someone got their maths wrong and forgot to include the sign of a real number.
Further reading:
http://en.wikipedia.org/wiki/PIC_microcontroller
http://www.microchip.com/
http://www.nutsvolts.com/index.php?/magazine/project/microcontroller_pic
If I can help further send me a PM, I am a retired engineer.
http://sylvabuild.blogspot.com/
http://austin7special.blogspot.co.uk/
|
|
|
hobbsy
|
| posted on 14/8/13 at 01:49 AM |
|
|
I briefly looked at doing something similar a while ago. I think I found a project to cheaply implement a programmable shift light. All you then need
to do is use this when lit to lock out a downshift when above a certain rpm. If I recall it was fairly simple and based around a single off the shelf
ic and a few components.
If interested I will try and dig out my notes. Didn't carry on as I've moved away from an electronically actuated shift.
|
|
|
beaver34
|
| posted on 14/8/13 at 05:46 AM |
|
|
thanks guys,
yes if you could, basicly need some device that has a rpm feed that will not allow a shift signal from the paddle or button untill its below say 6k
|
|
|
ianm67
|
| posted on 21/8/13 at 01:20 PM |
|
|
Have you had a look at the Kliktronic system? They may be able to help......
http://www.kliktronic.co.uk/
HTH,
IanM
Always biting off more than I can chew.....
|
|
|
hobbsy
|
| posted on 21/8/13 at 03:22 PM |
|
|
I can't find my notes but in essence if you tapped into the shift light bulb on any programmable shift light and in simple terms got it to power
a relay you could use this to create a downshift lock out. I.e. shift light on activates the relay which is set up so it breaks the connection to the
shift actuator.
It could done a lot more elegantly than this but you get the idea.
|
|
|
beaver34
|
| posted on 21/8/13 at 03:50 PM |
|
|
quote:
Originally posted by ianm67
Have you had a look at the Kliktronic system? They may be able to help......
http://www.kliktronic.co.uk/
HTH,
IanM
thanks,
ended up going for a geartronitcs ecu, not the cheapest but cheaper than a 500bhp engine 
|
|
|
