DIY_EFI Digest Tuesday, 30 April 1996 Volume 01 : Number 125 In this issue: Re: Honda UEGO Sensor... Re: Honda UEGO Sensor... Re: Honda UEGO Sensor... See the end of the digest for information on subscribing to the DIY_EFI or DIY_EFI-Digest mailing lists. ---------------------------------------------------------------------- From: Frank Parker Date: Mon, 29 Apr 1996 14:40:48 -0600 (EDT) Subject: Re: Honda UEGO Sensor... > >Frank Parker > > Frank: > Any chance of posting some of the info from that paper? > > BTW I heard a while back (maybe on this list) that the Honda UEGO was > optimized for the lean range. After all, that is what they are using them for. > Also I think Robert Dingly mentioned that NTK made 3 versions of the > UEGO - rich, lean, and wide band. > > Based on this info I ordered a setup from NTK a month ago. (as I posted) > This info is from SAE paper 920234 ( 1992) called univ a/f heated exh gas O2 sensor by T. Yamada from NGK: 1986 Honda sensor used in 16-18 a/f range- NGK sensor Thus lean only UEGO, wide range sensor, same sensor as used in NGK/Horriba a/f meter. Japan Patent # 148849 dated 1987 Cell consists of 3 substrates: O2 pumping cell, O2 galvanic cell, and O2 ref cavity. The pumping current is maintained by closed loop feedback . Output is proportional to O2 in exhaust on lean side, is equal to 0 volts @xxx.7 stio, and is proportional to amt O2 required for complete combustion of exhaust gas on rich side. Thus proportional to a/f ratio. Frank Parker > > ------------------------------ From: Land Shark Date: Mon, 29 Apr 1996 17:29:14 -0600 Subject: Re: Honda UEGO Sensor... At 02:40 PM 4/29/96 -0600, you wrote: >This info is from SAE paper 920234 ( 1992) called univ a/f heated exh gas >O2 sensor by T. Yamada from NGK: > 1986 Honda sensor used in 16-18 a/f range- NGK sensor > Thus lean only I believe that the 1986 Honda Sensor is simply a current driven diffusion coated leanburn sensor ... like a carefully designed HEGO with a special diffusion coating, it is driven at a carefully selected voltage, with the current proportional to the AFR ... From EVERYTHING I can find on the current (1993 Civic VX) sensor it measures LEAN as well as rich mixtures... in fact, even the Mitchell diag manual shows the output curve which looks suspiciously like the printed/publushed NTK/NGK info... Jim ------------------------------ From: "Zublin, Bryan (SD-MS)" Date: Mon, 29 Apr 1996 17:28:00 -0700 (PDT) Subject: Re: Honda UEGO Sensor... Frank Parker writes: > UEGO, wide range sensor, same sensor as used in NGK/Horriba a/f > meter. Japan Patent # 148849 dated 1987 Frank, Do you (or anyone else) know the US patent number(s) for this (these) device(s) ? I wonder if the Japanese patent is available in English. Bryan Zublin bzublin@xxx.com ------------------------------ End of DIY_EFI Digest V1 #125 ***************************** To subscribe to DIY_EFI-Digest, send the command: subscribe diy_efi-digest in the body of a message to "Majordomo@xxx. A non-digest (direct mail) version of this list is also available; to subscribe to that instead, replace "diy_efi-digest" in the command above with "diy_efi".