[Diy-efi] Traction Control System - In progress (Update 1)

[md4etal]

Been doing something similar with getting a basic stamp or and Atom pic to
convert the input pulses to serial data.  Having a little problem with the
frequency of the signal and the baud rate.  Basic Micro Atom seems to have a
better chance.

Contact me off list for details.

Mike Dekutoski
md4etal at netzero.net
----- Original Message -----
From: "Crescent Kao" <crescent at c-speedracing.com>
To: <diy-efi at www.diy-efi.org>
Sent: Thursday, April 18, 2002 11:34 PM
Subject: [Diy-efi] Traction Control System - In progress (Update 1)


> Hello guys,
>   We've been following the diy traction control system for some time now
and
> we've finally decided to get the ball rolling on our own. Our test vehicle
> is a 1999 Acura Integra equipped with ABS that is naturally aspirated (
> www.c-speedracing.com/integra.html )
>
> Our current approach is as follows (in a nut shell):
>
> - read input from existing ABS sensors
> - collect data from sensors to incar laptop via serial connection
> - process the data via some algorithm X
> - cut spark and/or fuel to reduce power due to wheelspin
>
> We examined the ABS wiring diagram for the test vehicle and were able to
> read a signal for each wheel. This is the results from the readings:
>
> Front wheels: 50mv and up (increases with vehicle speed)
> Rear wheels: 50mv and up (increases with vehicle speed)
>
> At around 30mph the reading was around 140mv
>
> The vehicle manual states that when the wheels are turned at 1 revolution
> per second, a digital meter should read 70mv or above in AC. From our
> testing, it looks like the faster the vehicle is traveling, the higher the
> voltage is.
>
> Our next hurdle at this point is figuring out how to interface the ABS
> signal to our laptop through a serial connection. We have pretty extensive
> programming experience, however none that deals with hardware interface.
> We're wondering what we can do as far as implementing a serial connection
> and what is required as far as libraries (C++) and where to get them.
>
> The reason we would like to use a serial connection is so that we can send
> modified signals to the ECU to reduce engine power. We're not sure how to
do
> this yet as we haven't gotten that far to tackle that hurdle. On a side
> note, we talked about taking the analog input from the ABS sensors and
> feeding them to the microphone input jack on the laptop since there is an
> abundance of softare and libraries that will work with that. But I don't
> that is the best approach.
>
> So, at this stage in the game, if anyone knows of how we can take that
> signal from the ABS and read it on a laptop, please let me know... we'd
like
> further this developement as quickly as we can.
>
> Thanks.
>
>
> Crescent Kao
> Director of Marketing and Sales
> www.c-speedracing.com
>
>
> _______________________________________________
> Diy-efi mailing list
> Diy-efi at diy-efi.org
> http://diy-efi.org/mailman/listinfo/diy-efi
>


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