DIY_EFI Digest Thursday, 11 April 1996 Volume 01 : Number 106 In this issue: Re: Catalytic converter temps Re: Catcon temps/Heywood ref... Re: Catalytic converter temps (now book reviews) Re: Catcon temps/Heywood ref... Re: Catalytic converter temps Re: Updated efi reference Re: Multi Spark Ignition... Re: Multispark stuff and other thoughts RE: Multispark stuff and other thoughts Re: EEC-IV Questions Nat semi! HEI dizzy Automotive article in Circuit Cellar Ink See the end of the digest for information on subscribing to the DIY_EFI or DIY_EFI-Digest mailing lists. ---------------------------------------------------------------------- From: ehernan3@xxx.com (Edward Hernandez (R)) Date: Wed, 10 Apr 1996 16:16:39 +0500 Subject: Re: Catalytic converter temps The book is "Internal Combustion Engine Fundamentals" by John B. Heywood, which I consider to be both an excellent reference book for the professional engineer and the dedicated gearhead/DIYer. It might be deep for a gearhead without a degree. It was an expensive book when I bought it in college(it was our textbook when I took his class), so here's your sticker shock warning. Well worth the investment, but try the library first. PS This is the book that you guys/gals keep forcing me to look stuff up in for the detailed if not sometimes unsolicited posts. Hope no one thought I had this stuff memorized! Ed Hernandez Ford Motor Company ehernan3@xxx.com ------------------------------ From: TAR Date: Wed, 10 Apr 1996 15:31:10 -0600 (MDT) Subject: Re: Catcon temps/Heywood ref... Ed, Would you happen to have the ISBN for the below referenced book? It sounds like one I should add to my collection. Thanks a million, Todd- On Tue, 9 Apr 1996, Edward Hernandez (R) wrote: > Looking at a cat efficiency conversion chart tells a lot: as you go > lean, HC conversion efficiency approaches 100%, a pretty good indica- > tion of how much heat gets generated when you go lean. Such a chart > can be found in Heywood's book, if you have one. Damn good book! > > Ed Hernandez > Ford Motor Company > ehernan3@xxx.com ||||||||||||||||||||||||||||||||||||||||||||| Todd Ratke e-mail: tratke@xxx.ca -or- ratke@xxx.ca ||||||||||||||||||||||||||||||||||||||||||||| ------------------------------ From: Jerry Wills Date: Wed, 10 Apr 96 15:48:33 PDT Subject: Re: Catalytic converter temps (now book reviews) >>>>> "Ed" == Edward Hernandez (R) writes: Ed> The book is "Internal Combustion Engine Fundamentals" by John B. Ed> Heywood, which I consider to be both an excellent reference book for Ed> the professional engineer and the dedicated gearhead/DIYer. It might Ed> be deep for a gearhead without a degree. It was an expensive book when Ed> I bought it in college(it was our textbook when I took his class), so Ed> here's your sticker shock warning. Well worth the investment, but try Ed> the library first. Any opinions on how it compares to Charles F Taylor, two volume set. I paid $70 for them a year ago. I don't know the exact title,but I'll look when I'm at home. It gets a bit deep too. :^) Jerry Wills I'll have enough POWER when I can spin the tires at the end of the straight! 89 FJ DERSLYR, DoD#500 KotF(Flag) Mark Donahue, about 917's USC/Information Sciences Institute (USC/ISI) SoCal (310) 822-1511 x 236 90's cowboys, ride iron horses, and punch Deer!!! You done violated Physics, BOY! Assume the position..... (Rider 5/92) ------------------------------ From: Timothy Coste Date: Wed, 10 Apr 1996 19:06:26 -0400 Subject: Re: Catcon temps/Heywood ref... Hi all, I'm way behind in keeping up with the list, but I just happened to notice this line of posts... No doubt, Heywoods book is an excellent book. Everything from simple charts showing the relationships pretty straightforwardly (like Ed's example) thru some seriously complex analyses of different engine processes. My copy is at work (and I'm not) so until then I couldn't give you the ISBN, but if no one comes up with before tomorrow morning, I'll post it. We use it here (Mich. Tech. Univ.) in several senior level engines classes. I still go back to it all the time. I believe Heywood consults regularly with Ford (so I've heard) and I know his name makes it on a LOT of SAE papers. Sorry for the not so helpful bandwidth usage, but if possible, you should get Heywoods book. :) Standard disclaimers...never even actually met the guy. Tim Coste tlcoste@xxx.edu ------------------------------ From: Terry Faugno Date: Wed, 10 Apr 1996 16:13:18 -0700 Subject: Re: Catalytic converter temps At 04:16 PM 4/10/96 +0500, you wrote: >The book is "Internal Combustion Engine Fundamentals" by John B. >Heywood, which I consider to be both an excellent reference book for >the professional engineer and the dedicated gearhead/DIYer. It might >be deep for a gearhead without a degree. It was an expensive book when >I bought it in college(it was our textbook when I took his class), so >here's your sticker shock warning. Well worth the investment, but try >the library first. > >PS This is the book that you guys/gals keep forcing me to look stuff >up in for the detailed if not sometimes unsolicited posts. Hope no one >thought I had this stuff memorized! > >Ed Hernandez >Ford Motor Company >ehernan3@xxx.com Next time you get a hair-puller, and break out the book, how about firing off the ISBN number while you're looking? Thanx. Terry ------------------------------ From: David Channon Date: Thu, 11 Apr 1996 10:57:42 +1000 (EST) Subject: Re: Updated efi reference > > A list of references on Engine Management, fuel injection, > EFI related parts and components. > > Currently maintained by Steve Ravet > sravet@xxx.com > Available via WWW at: > http://www.dcc.edu/vettenet/efi_ref.txt > This http reference reports forbidden to my netscape2.0 web browser. Cheers David. ------------------------------ From: "Zublin, Bryan (SD-MS)" Date: Wed, 10 Apr 1996 18:19:00 -0700 (PDT) Subject: Re: Multi Spark Ignition... >Since the MultiSpark issue has been brought up, *someone* in the past had >reversed-engineered the box and was going to post the schematic??? I am the guilty party. I promised this info more than a year ago (!), but never finished it up to my satisfaction. Bryan Zublin bzublin@xxx.com ------------------------------ From: "Zublin, Bryan (SD-MS)" Date: Wed, 10 Apr 1996 18:32:00 -0700 (PDT) Subject: Re: Multispark stuff and other thoughts >Several OEMs are doing this or designing engines that do this, namely, >one coil per spark plug. The Acura NSX has this setup for their V6. The drivers for the coils appear to be simple common emitter NPN power transistors (all six in one module, separate from the EFI controller). I think some of the newer Volvo 4 cylinder engines also have one coil per spark plug. Bryan Zublin bzublin@xxx.com ------------------------------ From: "Zublin, Bryan (SD-MS)" Date: Wed, 10 Apr 1996 18:37:00 -0700 (PDT) Subject: RE: Multispark stuff and other thoughts >How many sparks per event would depend upon the coil >charge and discharge time, but we all want to charge with real high >currents anyway.... Just some thoughts on the subject. The MSD system is capacitive discharge. For this type, the limiting factors are how fast you can charge up the main capacitor (example: 1 uF, 400 V) and how long it takes to discharge in the coil. Bryan Zublin bzublin@xxx.com ------------------------------ From: Corey Cole Date: Wed, 10 Apr 1996 20:06:35 -0700 (MST) Subject: Re: EEC-IV Questions On Wed, 10 Apr 1996, Brian Warburton, c/o Turbo Systems Ltd wrote: > > Can't say for sure about the very latest Ford modules, but up until > I left Ford of Britain in December 1994, the standard way to > determine if you were running in LOS (limp-home mode) was to > monitor the fuel pump with the ignition on before engaging crank. > The EEC-iv s/w used to keep the pump on for 1 second after key-on > without detecting rotation before turning it off. In LOS, the pump > was switched on all the time the ignition was on. > So far, everything I've gotten from the experts out there (a hearty thank you to all of you) shows that the vehicle is in LOS mode. The pump is on continuously with the key on, timing's fixed, etc. > >From my experience, the only thing that made the module run LOS was > the EEC-iv s/w failing to kick the LOS "watchdog". This implied a > serious software bug causing the s/w to get "lost" (unlikely in a > production module) or an electrical fault stopping the processor > from executing the s/w. To the best of my knowledge, there were no > sensor and/or actuator failures that would cause this condition. > > It may be time to dust off the logic-analyser ............ > > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > Brian Warburton, "Still searching for the perfect curve....." > email: bwarb@xxx.net > Advanced Automotive Electronics Ltd, > Van-Nuys House, Scotlands Drive, > Farnham Common, England. SL2-3ES > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > > > > > Corey Cole colec@xxx.edu '65 Skylark "Knowledge is power...but cubic inches help." Go #24!!!!! I was drunk the day my mom got out of prison and I went to pick her up in the rain. But before I could get to the station in my pick up truck, she got runned over by the darned old train... David Allen Coe Steve Goodman ------------------------------ From: "Jim Staff" Date: Thu, 11 Apr 1996 05:19:12 GMT Subject: Nat semi! Hello Everyone! It's a good day today! National Semiconductor gave me $150 worth of parts to complete my project, giving me some parts I didn't even ask for saying that they may be usefull in the future!!! So that means that I'll be getting my board construction underway starting next week while I wait for the digikey order to come in!!! Cliff : Have you found out what fried your system yet? If you can tell me what your system used as an injector driver I may be able to help. Also I can check to see if I use a very Similar method of doing whatever it was so I can avoid reproducing that "Learning Experience" for myself. Everyone : What would be a good method for making an ignition coil driver? AKA: What is the best way to avoid the super high back voltage when the field collapses? Yeah!!!! Nat Semi gave me $150!!!!!!!!! For some reason though they gave me 21 74HC688 8 bit Equality detecters & 6 Analog to Digital Converters, & 6 4 to 16 decoders... I've got a lot to play with!!!!! Jim Staff ------------------------------ From: dzorde@xxx.au Date: Thu, 11 Apr 96 14:51:10 Subject: HEI dizzy Hey everybody, Hopefully there are a few out there that know about the early Chev HEI distributers with the built in coil. Basically I am after some sort of an idea what the tacho output waveform should look like, since I'm not sure if the module in my dizzy is OK. It is a 4-pin module. The waveform I get goes to about 45V for the 1st 1/3 of the pulse, it then drops to about 15V for the remaining of the pulse. 45V |- |- | | | | | | | | | | | | | | | | 15V | ------ | ------ | | | | | | | | 0V | |-----| |----- Obviously the pulse is not quite as square as above, but I am wondering if this seems correct, because it seems to drive the tacho in the computer crazy and the car seems to idle roughly while misfiring above 1500rpm. Also what is a good size spark plug gap to use with these, I have read anything from 0.028" - 0.075", I'm using a 0.04" gap with a 350Chev. Hope someone can help Dan dzorde@xxx.au ------------------------------ From: "Clinton L. Corbin : Backgrind/Gold : Pager 0544" Date: Thu, 11 Apr 96 00:45:37 PDT Subject: Automotive article in Circuit Cellar Ink Hi folks, Seeing as there was a lot of knashing of teeth from those who missed Ed's efi article in Circuit Cellar, Ink, I though I should put a heads up on the list. In issue #69, April 1996, CCI has part one of a two part series on vehicular control multiplexing. The article is on pages 22 to 27 and is written by Willard Dickerson. The series covers Motorola's CAN and the J1850 multiplexing standards. It has info on the various protocalls and frameworks. He is specifically covering the Motorola MC68HC708AS20 in J1850 and the MC68HC05X16 in CAN. In issue #70, he will cover the 'HC708 and 'HC05 implementations in the T1850 and CAN networks. Get them while you can. You never know when you might need the info. Good luck on the projects, folks. Clint ccorbin@xxx.com ------------------------------ End of DIY_EFI Digest V1 #106 ***************************** 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".