DIY_EFI Digest Sunday, 19 May 1996 Volume 01 : Number 144 In this issue: Re: DIY_EFI Digest V1 #143 Re: a/f ratio with LPG See the end of the digest for information on subscribing to the DIY_EFI or DIY_EFI-Digest mailing lists. ---------------------------------------------------------------------- From: talltom Date: Sat, 18 May 1996 04:00:04 -0700 (PDT) Subject: Re: DIY_EFI Digest V1 #143 >------------------------------ > >From: James Weiler >Date: Fri, 17 May 1996 16:02:35 -0700 (PDT) >Subject: KE-jetronic closed loop > >Hello everyone. A recent discusion has prompted me to ask how an oxygen >sensor feeds back on a mechanical injection system? Does it contol a >fuel pump relay that alters the pressure? It makes sense how feedback >works on an electronic system by altering the pulse width of the >injectors. But there is no pulse width in a CIS system. > >Thanks to anyone who can educate me > >james@xxx.ca(james wieler) AAAhhhhaaaa!! Finally! Something comes across this list that I know about! This is revenge for he phlogistin theory of electronics!(insulation is to keep the smoke from leaking out.) They have this gizmo called a warmup regulator that has about a million levers, valves, diaphrams, vents, and non vents, and a bi-metal spring which is sometimes electricaly heated. All of which effect "control pressure" in the fuel distributor where there a milion more teensy little parts finely machined to millionths of an inch so that the first little bit of wear or corrosion sends you sniveling to the parts dealer begging for mercy. Anyhow, the more control pressure ya got the less fuel you're gonna git, so the trick becomes to remanufacture springs in warm up regulator to your application change vents around and piddle until you get the pressures right all the way around. And there is too a pulse in a cis system, it starts when the key is turned on, and quits when it is turned off. I don't really think you deserved this much of a smart ass answer, it's just that I'm pissed that I don't know what you guys are talking about most of the time. ------------------------------ From: Darrell Norquay Date: Sat, 18 May 96 10:58 PDT Subject: Re: a/f ratio with LPG >Well, how well do you want it to work. The real answer is no. We >generally buy the correct O2 sensor. Usually a gasoline sensor causes >the gaseous fueled cars to lean. Like 20 percent. A correction circuit >can be thrown in, but it is probably easier in the end to get the right >sender. That's my experience and opinion. > > >--Seth Allen >WWU Vehicle Research Institute Seth: You mean there IS an O2 sensor made especially for gaseous fuel / LPG?????? WHO makes it? WHAT do they cost? WHERE can I get some? WHEN did they become available? WHY didn't you say so earlier? HOW WELL do I want it to work? What kind of question is that? I want it to work flawlessly! regards dn ------------------------------ End of DIY_EFI Digest V1 #144 ***************************** 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".