DIY_EFI Digest Saturday, 7 June 1997 Volume 02 : Number 193 In this issue: Nissan 300 ZX lucas/bosch efi Re: Generic PID controller 02 sensor mounting O2 Sensor Fooler Re: Generic PID controller Re: FW: Generic PID controller Re: Air/ fuel ratio & percent oxygen Re: Generic PID controller Re[2]: FW: Generic PID controller Re: DIY_EFI Digest V2 #191 See the end of the digest for information on subscribing to the DIY_EFI or DIY_EFI-Digest mailing lists. ---------------------------------------------------------------------- From: TOM_HUSSEY@xxx.com Date: Fri, 6 Jun 97 07:14:56 -0400 Subject: Nissan 300 ZX Hi, > The module is a JECS unit that has two processors, both are 68 pin > devices one marked with " HD63C03YCP" the other " HD63140CP". The Rom ... > Does anybody have any idea who manufactures these processors and any > software that can help with the remapping. My guess is Hitachi. They made Motorola clones for a while under the HD63... numbers. - -Tom Hussey ------------------------------ From: Wilkrod@xxx.com Date: Fri, 6 Jun 1997 08:46:29 -0400 (EDT) Subject: lucas/bosch efi Howdy guys(gals) With regards to lucas/bosch efi as used on Jaguar xjs. Does anyone know what the speed pulse looks like . This pulse originates at the ignition amplifier, and is a direct input to the ecu. Would like to know p.w., amplitude, etc. I have an intermittent failure which shuts down my injection events. I have isolated this to the eng. rpm signal but do not know what the signal should look like . I appreciate any help . Thanks, Jeff ------------------------------ From: Daniel Grambihler Date: Fri, 6 Jun 1997 05:44:10 -0700 (MST) Subject: Re: Generic PID controller Hi Ric: You sure get around. I was just about to save this off for later consumption (based on the subject line) and then noticed your name and thought to myself "Self. Is this a Ferrari list message?". As a side, I'm considering buying carbed boxer, but I'd probably have to ditch my 328 to get it. Any thoughts/advice? I realize that my driving habits would have to be different with the boxer, but I'm wondering if there are other things I'm not considering.... later - Daniel > > >I need a generic PID controller which is required to control fuel rail > >pressure via a PWM modulated pressure regulator (about 2-3A at 100%). > >The input is a 0-5V ratiometric pressure sensor. It is mobile therefore > >needs to be powered by the standard 12V auto electrical system. The > >main requirements (apart from the above) are: > > Tell me more about this PWM controlled pressure regulator. I need this for > a non-automotive project. How much and where can I get one? > > Thanks, > Ric Rainbolt > > - -- Daniel Grambihler danielg@xxx.com '47 CJ2A '87 328 GTS '95 D90 #3064 '96 900SS/CR ------------------------------ From: Greg Woods Date: Fri, 6 Jun 1997 08:48:16 -0500 Subject: 02 sensor mounting Thanks to everyone who replied on my O2 sensor mounting problem. I like the anti-fouler idea, I think I might try that. One question: The placement of the O2 sensor on an '86 OEM FI GM 2.8L engine is normally in the exhaust manifold. I'm not a welder but as far as I know, I cannot weld a sensor bung into a cast iron exhaust manifold. From what I've read the O2 sensor likes to stay nice and hot. If I move the O2 sensor down stream to the Y-pipe, is it going to stay hot enough?? Oh, one other question: my carberated version of this engine had an air pump on it. It seems to me that this air pump injecting air into the exhaust stream would cause the O2 sensor readings to be in error. Do I need to remove my smog pump?? TIA Greg Woods gwoods@xxx.com austin, tx ------------------------------ From: James Thorne Date: Fri, 06 Jun 1997 09:20:53 -0500 Subject: O2 Sensor Fooler I did not get the schematic for the O2 Sensor fooler. It sounds like something I could use to build. Could someone email me a copy? Thanks James Thorne jthorn@xxx.com ------------------------------ From: Daniel Grambihler Date: Fri, 6 Jun 1997 07:29:15 -0700 (MST) Subject: Re: Generic PID controller Oops!!! Sorry for posting this to the list...I meant it to be private. - - Daniel > Hi Ric: etc.,etc. - -- Daniel Grambihler danielg@xxx.com '47 CJ2A '87 328 GTS '95 D90 #3064 '96 900SS/CR ------------------------------ From: Kurt Bilinski Date: Fri, 06 Jun 1997 08:09:34 -0700 Subject: Re: FW: Generic PID controller At 09:05 AM 6/6/97 +0100, you wrote: >> >I need a generic PID controller which is required to control fuel >> rail >> >pressure via a PWM modulated pressure regulator (about 2-3A at 100%). >> >The input is a 0-5V ratiometric pressure sensor. It is mobile >> therefore >> >needs to be powered by the standard 12V auto electrical system. The >> >main requirements (apart from the above) are: >> >> >> I think more information is required. Why not use a mechanical >> regulator? >> >This is a mechanical regulator in a sense, it's just that the pressure >set-point is electrically (PWM) modulated, from 0.35 to 12 MPa. (50-1750 >psi). It's for a gasoline direct injection (GDI) system and is made by >Bosch. (Not sure how much Ric) Does this regulator maintain a setpoint pressure, or is it only a valve. If it is a real regulator, I don't thing you need the expense of a PID controller, just a variable duty-cycle oscillator, maybe a 555 circuit. Either you or an electrical buddy could make one relatively easy. Kurt ------------------------------ From: "Bosch, AN, Andrew, Dr" Date: Fri, 6 Jun 1997 17:31:52 UTC-2 Subject: Re: Air/ fuel ratio & percent oxygen Hi All Maybe someone can help with the following: What is the relationship between a given air/ fuel ratio (AFR) and the percentage oxygen in exhaust gas? For example, at an AFR of 14.7, what would you measure as the percentage oxygen in the exhaust gas; similarly, what would the % oxygen be at an AFR of 13, or whatever other ratio one was interested in? The voltage output of an exhaust gas oxygen sensor is obviously converted to AFR, but how is that done? Thanks. Andrew Dr A. N. Bosch Physiology Department/ Sports Science Institute University of Cape Town Medical School P. O. Box 115 Newlands 7700 South Africa ------------------------------ From: Doug Yip Date: Fri, 06 Jun 1997 10:01:29 -0700 Subject: Re: Generic PID controller Andrew: Sounds like an interesting regulator. Do you have any info you could send me, or a part number and a source? Best Regards, Doug Yip ------------------------------ From: Mark Eidson Date: Fri, 06 Jun 97 10:31:00 PDT Subject: Re[2]: FW: Generic PID controller Text item: Are you going to set fuel pressure based manifold MAF or MAP? If so are you intending to control this from the computer? Are you going to need a fuel pressure sensor as an input to the control algorithm? me ______________________________ Reply Separator _________________________________ Subject: Re: FW: Generic PID controller Author: owner-diy_efi-outgoing@xxx.edu at SMTPGATE Date: 6/6/97 8:09 AM At 09:05 AM 6/6/97 +0100, you wrote: >> >I need a generic PID controller which is required to control fuel >> rail >> >pressure via a PWM modulated pressure regulator (about 2-3A at 100%). >> >The input is a 0-5V ratiometric pressure sensor. It is mobile >> therefore >> >needs to be powered by the standard 12V auto electrical system. The >> >main requirements (apart from the above) are: >> >> >> I think more information is required. Why not use a mechanical >> regulator? >> >This is a mechanical regulator in a sense, it's just that the pressure >set-point is electrically (PWM) modulated, from 0.35 to 12 MPa. (50-1750 >psi). It's for a gasoline direct injection (GDI) system and is made by >Bosch. (Not sure how much Ric) Does this regulator maintain a setpoint pressure, or is it only a valve. If it is a real regulator, I don't thing you need the expense of a PID controller, just a variable duty-cycle oscillator, maybe a 555 circuit. Either you or an electrical buddy could make one relatively easy. Kurt Text item: External Message Header The following mail header is for administrative use and may be ignored unless there are problems. ***IF THERE ARE PROBLEMS SAVE THESE HEADERS***. Reply-To: diy_efi@xxx.edu Precedence: bulk Sender: owner-diy_efi@xxx.edu Content-transfer-encoding: 7BIT Content-type: text/plain; charset="us-ascii" X-Mailer: Windows Eudora Pro Version 3.0 (16) MIME-version: 1.0 Message-id: <3.0.16.19970606080930.5f071030@xxx.com> To: diy_efi@xxx.edu X-Sender: bilink@xxx.com Subject: Re: FW: Generic PID controller From: Kurt Bilinski Date: Fri, 06 Jun 1997 08:09:34 -0700 Received: from pc1161 (141.248.172.179) by GAT.COM (PMDF V5.0-7 #3951) id <01IJQUCPU7I894E0J2@xxx.edu; Fri, 06 Jun 1997 08:09:34 -0800 (PST) Received: from VAXA.GAT.COM by coulomb.eng.ohio-state.edu via ESMTP (940816.SGI. 8.6.9/940406.SGI) for id LAA10205; Fri, 6 Jun 1997 11:11 :33 -0400 Received: by coulomb.eng.ohio-state.edu (940816.SGI.8.6.9/940406.SGI) for diy_efi-outgoing id PAA10210; Fri, 6 Jun 1997 15:11:36 GMT Received: from coulomb.eng.ohio-state.edu by thalia.fm.intel.com (8.8.4/10.0i); Fri, 6 Jun 1997 16:22:46 GMT Received: from thalia.fm.intel.com (thalia.fm.intel.com [132.233.247.11]) by fmm ail.fm.intel.com (8.8.5/8.7.3) with ESMTP id JAA23055 for ; Fri, 6 Jun 1997 09:24:09 -0700 (PDT) Return-Path: owner-diy_efi-outgoing@xxx.edu ------------------------------ From: MAgishian@xxx.com Date: Fri, 6 Jun 1997 16:43:07 -0400 (EDT) Subject: Re: DIY_EFI Digest V2 #191 pleeeze repost o2 fooler. thank you much ------------------------------ End of DIY_EFI Digest V2 #193 ***************************** 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".