Intro - and question

[Andrew H. Voss]

>> The signal contains a lot of info, but it isn't easy to
>> extract it from each firing at 5000 rpm.
>
>	Just what is the information and how do you get it.  The little
>I've heard about the Sabb system is that they use it for a knock sensor. 
>It sounds like it would take alot of testing to know what the output means.
>
>
>Henry Sommer | gt0035b at prism.gatech.edu | Georgia Institute of Technology

You're right.  it does take a lot of testing to get the info out of the
signal.  Mecel is currently working on knock detection, cam position
detection, misfire, preignition, and air/fuel ratio detection.  Huge efforts
have been undertaken by people in universities, Mecel, and Delco to try to
realize these functions and good results have been achieved.  I can't
provide any details, unfortunately, but I also don't think a person with a
soldering iron can get any useful signal out of a spark plug.  The benefits
to a car company are evident, especially if the individual sensors mentioned
above can be deleted from the system.  That's why we are working so hard on
this.

Andy Voss                 
Advanced Powertrain Systems     c23ahv at kocrsv01.delcoelect.com 
Delco Electronics Corp.         (317)451-0415    GM:8-322-0415

"If you always do what you always did, you will always get what you always
got." - Unknown