 How many MPSs are "popped"? |
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| McMark |
 Mar 26 2005, 03:48 AM
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#1
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914 Freak!  Group: Retired Admin Posts: 20,179 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None  |
I pretty much assume that every MPS I see is either broken or on its way out (diaphragm damage). I'm I right or wrong?
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| ArtechnikA |
Mar 26 2005, 08:17 AM
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rich herzog Group: Members Posts: 7,390 Joined: 4-April 03 From: Salted Roads, PA Member No.: 513 Region Association: None |
sorry, but if you did, you would be wrong... we have BTDT through this topic a zillion times. D-Jet is *nothing* like a modern system. it's based on an analog trick. the trigger points make the square wave that drives the injectors. the MPS is a variable-reluctance transformer. it uses vacuum sensing to move an iron core to swallow up more or less of that initial square wave signal. i suppose you *could* build a device that could simulate the characteristics of a variable-reluctance transducer, but it would be hard, and it would not give you the desired effect of working with off the shelf components. D-Jet was a clever analog computing engineering trick for the mid''60's when it was designed. but we've learned a bunch of stuff in 40 years, and we'd never approach that problem that way doing it now. when you approach it with what's available now, you wind up with a MegaSquirt... |
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Posts in this topic
McMark How many MPSs are "popped"? Mar 26 2005, 03:48 AM
redshift I think the next couple years will be unreal for e... Mar 26 2005, 03:58 AM davep I have about 12 units, one of which will hold some... Mar 26 2005, 06:05 AM jwalters Speaking of MPS's-- Are there not suitable lat... Mar 26 2005, 07:11 AM redshift If there was, and we knew about it, we'd have ... Mar 26 2005, 07:20 AM jwalters Yea, I kinda figured that, but I also kinda figure... Mar 26 2005, 07:26 AM redshift How about a virtual MPS, that fakes the signal, dr... Mar 26 2005, 07:28 AM jwalters That is easily done my making a pot and hooking it... Mar 26 2005, 07:36 AM redshift it sees three conditions, right?
1. Idle
2. POT ... Mar 26 2005, 08:00 AM Jeff Bowlsby 
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