There are two papers up on my website: http://vehicle.me.berkeley.edu/efi/SAE920289/ http://vehicle.me.berkeley.edu/efi/SAE930352/ These two should answer most of your questions. On Sun, 16 May 1999, rr wrote: > P.S. A while back there was a link to an epa article posted, > interesting reading, I'll see if I can find it.