Automotive Circuit Digrams
bigirv
Posts: 37
Would anyone happen to have good links for a fuel injector and ignition coil driver circuits that can interface with a prop? Id imagine you would use a mosfet somewhere.
Comments
http://www.alldatadiy.com/
-dan
With that said, the factory service documentation I have seen never shows schematic diagrams of any electronic modules. Rather they just show pin connections and give a general description of how an electronic module works. And they say very little about the operation of engine control computers.
Also as a rule, there are no "data sheets" available for any automotive parts available anywhere (as it is with the rest of the electrical / electronic world). Just part numbers on the box typically!
There is a "home made" (if you will) complete fuel injection system with all the schematic diagrams and software quite well documented. That is the "MegaSquirt" and it can be found here...
http://www.megamanual.com
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I have not been able to find any of these drivers.(the only numbers look more like date codes)
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I read about an IGBT injector driver TO220 device in a Nuts&Volts mag. back in the day...But I can't seem to find it now.
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This device pulsed-out a short full current pulse..To lift the injector off seat...Then cut current to just hold the injector open for the pulse duration...This was done to keep from over heating the coil in the injector.
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The pulse looked similar to this jpeg
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Take a look at this
Most Libraries I have been to will not let you check out reference materials, so you can just make copies of the electrical diagrams. If you have a school ID, you can get a discount on the printing costs.
Haynes books does NOT have the required diagrams. They only have the 'wiring looms' Anything more is considered 'beyond the scope of the book'.
They write the books by tearing down a car and re-assembling it., and don't get any information or help from the manufacturer.
Anything they don't feel competent to do themselves they just skip or tell you to get fixed at the dealer...
The wimps didn't even try to dismantle the ragtop sunroof of my car model(Citroen Berlingo) because 'Removal of the roof first requires the headlining to be removed, which is a tedious operation, and not a task to be undertaken lightly'
The one thing they're 'famous' for is that just about every procedure begins with disconnecting the battery...
However the manufacturer's factory service manuals are typically 2000 pages of information and 4 phone sized books to a set. And just on one specific vehicle! For example I have a factory wiring diagrams book for my car which is JUST wiring diagrams and over 100 pages in itself. However it does not show schematic diagrams of electronic modules, just the connections to those modules and what each pin is for.
You can order factory service manual sets from a dealer or from alldata.com (about $160 for complete set of 4 books). Or can view the information online at alldatadiy.com