Keith,<div> Thank you for that link about the Lean Burn system. Computer technology in cars have become orders of magnitude more powerful. It is now possible to know a whole lot about the running condition of a modern engine due to the network of sensors. I became interested in emissions control systems, and in the laws governing them, after my car started showing trouble codes, even after a tuneup and the O2 sensors were changed. What I have found is some of these systems, especially the secondary air injection, are no longer necessary, due to more precise fuel injection and O2 sensor systems (see Wikipedia). Secondary air injection was necessary for cars in the 1960s and 1970s before all of the feedback loop control systems that we have today. Unfortunately, manufacturers have to keep putting these systems in because the laws haven't kept up with the rapid pace of the technology (they never will). This is a classic case of government intervention hurting people (financially) more than helping. </div>
<div><br></div><div>I say people shouldn't have to pay up front because a code is thrown for a useless legacy system; they should only have to pay once it is shown, via the computer logs, that the car has a failure in one of the more useful feedback loop sensors.<br>
<br><div class="gmail_quote">On Thu, Sep 8, 2011 at 9:34 AM, Watson, Keith <span dir="ltr"><<a href="mailto:krwatson@cc.gatech.edu">krwatson@cc.gatech.edu</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
> -----Original Message-----<br>
> From: <a href="mailto:ale-bounces@ale.org">ale-bounces@ale.org</a> [mailto:<a href="mailto:ale-bounces@ale.org">ale-bounces@ale.org</a>] On Behalf Of Boris<br>
> Borisov<br>
> Sent: Wednesday, September 07, 2011 21:47<br>
> To: <a href="mailto:ale@ale.org">ale@ale.org</a><br>
> Subject: Re: [ale] Car Topic<br>
<div class="im">><br>
> .... Here's a computer related piece of trivia. MB had engine computers<br>
> in<br>
> their cars as early as 1985 I believe ....<br>
><br>
><br>
> <a href="http://en.wikipedia.org/wiki/Ford_EEC" target="_blank">http://en.wikipedia.org/wiki/Ford_EEC</a><br>
<br>
<br>
<br>
</div>Chrysler started using computers in 1976. They were hybrid digital/analog.<br>
<br>
<a href="http://en.wikipedia.org/wiki/Lean_burn" target="_blank">http://en.wikipedia.org/wiki/Lean_burn</a><br>
<br>
As a consultant for E-Virotronics I reverse engineered Lean Burn computers so they could be remanufactured (I still have a schematic for one of the Lean Burn computers). I also reverse engineered one of the Ford computers (A2 I think).<br>
<br>
keith<br>
<font color="#888888"><br>
<br>
--<br>
<br>
Keith R. Watson Georgia Institute of Technology<br>
IT Support professional Lead College of Computing<br>
<a href="mailto:keith.watson@cc.gatech.edu">keith.watson@cc.gatech.edu</a> 801 Atlantic Drive NW<br>
<a href="tel:%28404%29%20385-7401" value="+14043857401">(404) 385-7401</a> Atlanta, GA 30332-0280<br>
</font><div><div></div><div class="h5"><br>
_______________________________________________<br>
Ale mailing list<br>
<a href="mailto:Ale@ale.org">Ale@ale.org</a><br>
<a href="http://mail.ale.org/mailman/listinfo/ale" target="_blank">http://mail.ale.org/mailman/listinfo/ale</a><br>
See JOBS, ANNOUNCE and SCHOOLS lists at<br>
<a href="http://mail.ale.org/mailman/listinfo" target="_blank">http://mail.ale.org/mailman/listinfo</a><br>
</div></div></blockquote></div><br></div>