[Diy_efi] new EFI controller

[Toyota Supra]

the ability to controll additional injectors, based on a 3d map of boost, 
rpm and tps

10 general purpose outputs, with completely customizable 3d fields, based on 
boost, rpm and tps

if it has those 2 things, with programming software, i would buy it

-j






From: "Bevan Weiss" <kaizen__ at hotmail.com>
>Reply-To: List for general do-it-yourself EFI talk <diy_efi at diy-efi.org>
>To: <diy_efi at diy-efi.org>
>Subject: [Diy_efi] new EFI controller
>Date: Mon, 10 Mar 2003 13:57:20 +1300
>
>OK, there was talk about this a while ago but things kind of fizzled with
>Gars departure.  I've been thinking about a new controller in the same kind
>of style as EFI332.  Using the MPC565 from Motorola, or the MPC566 for 
>those
>that just want to be different.  It's got the vast majority of required
>features already onchip.  And it has the processing power to achieve some 
>of
>those dream objectives like ION sense.
>
>Some of the ideas that I've been considering are:
>analog->digital sample rate:
>The MPC565 has two QADC (Queued Analog Digital Converters) each can run up
>to 200KSPS.  I'm thinking that if one is dedicated to ION sense, ie round
>robin 4/6/8/12 cylinders, and the remaining channel does a similar round
>robin of the remaining sensors ie MAP/MAF, TPS etc...
>What kind of rate of change do you think these signals undergo?
>Is the round robin 200KSPS enough?
>
>Ignition:
>I really don't like the idea of inductive ignition systems, pumping current
>through an inductor just to store some energy in the magnetic field seems a
>little harsh.  I prefer CDI systems, although I think that perhaps some 
>kind
>of multispark arrangement would be preferred.  Have it such that the 565
>sends out an ignition pulse, the rising edge causes the CDI system to
>discharge the capacitor by a certain level (however much would give ~50mJ
>spark), the discharge is stopped (by the CDI circuitry) and the capacitor
>charges some more, then reaches a preset voltage and discharges again.  
>Kind
>of like oscillating between two preset voltage levels. This continues until
>the 565 lowers the ignition output, then the capacitor is just charged back
>up ready for the next ignition event.
>
>Injection:
>Nothing fancy that I can think of.  I'd really like to keep this part 
>simple
>as, I don't really want anything like a DC-DC converter, I'd prefer to
>obtain any high voltage from the actual field collapse, and then use this
>energy to jump start the field back up again with the next injection pulse.
>
>ION sense:
>this will pretty much just be a current sense resistor with some
>programmable gain differential amplifier which then feeds the QADC of the
>565.  Certain algorithms could be run on a particular sample (ie one
>ignition cycle) to look for such things as peak pressure not occuring at
>optimum crank angle, and knock/pre-detonation.
>
>WBO2:
>This would use a concept similar to the DDL scheme...
>
>MAP/MAF:
>Is there any advantage to having both?
>Apart from redundancy (if one fails...)
>
>Other ideas/comments appreciated :)
>
>_______________________________________________
>Diy_efi mailing list
>Diy_efi at diy-efi.org
>http://www.diy-efi.org/mailman/listinfo/diy_efi


_________________________________________________________________
The new MSN 8: advanced junk mail protection and 2 months FREE*  
http://join.msn.com/?page=features/junkmail


_______________________________________________
Diy_efi mailing list
Diy_efi at diy-efi.org
http://www.diy-efi.org/mailman/listinfo/diy_efi