Controlling VVT
08-24-2008, 01:53 AM
#41
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Did a quick google image search for "VICS cross section". Got this:
http://img49.imageshack.us/img49/942...ek11004sc1.jpg
Hope it helps you,matt
http://img49.imageshack.us/img49/942...ek11004sc1.jpg
Hope it helps you,matt
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08-24-2008, 10:48 AM
#43
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I don't rightly know. 
I kinda stepped back here for a while to see where this went. I'm not really clear on whether Abe intends to re-write the software to do crank-cam phase detection and thus implement closed-loop control, or whether we're content just running open-loop with the EBC map... I personally expect the latter would be sufficient, and wherever possible I try to avoid things like forking the code.
I kinda stepped back here for a while to see where this went. I'm not really clear on whether Abe intends to re-write the software to do crank-cam phase detection and thus implement closed-loop control, or whether we're content just running open-loop with the EBC map... I personally expect the latter would be sufficient, and wherever possible I try to avoid things like forking the code.
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08-25-2008, 11:49 AM
#44
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Coolio.
Would you be so kind as to capture BOTH the cam angle sensor output, and the crank angle sensor output, in 2 conditions:
-full retard (disconnect plug to solenoid)
-full advance (apply full 12V across it)
I'd like to know if any edges between the 2 sensors cross over when going from advance to retard.
This info would be very useful for:
1) determining if my AEM can control full VVT phasing (PS I have a 99 head now)
If I were in that position, I'd write my own VVT control code into a standalone micro, and use the MS to output a VVT phase request to the controller.
Would you be so kind as to capture BOTH the cam angle sensor output, and the crank angle sensor output, in 2 conditions:
-full retard (disconnect plug to solenoid)
-full advance (apply full 12V across it)
I'd like to know if any edges between the 2 sensors cross over when going from advance to retard.
This info would be very useful for:
1) determining if my AEM can control full VVT phasing (PS I have a 99 head now)
If I were in that position, I'd write my own VVT control code into a standalone micro, and use the MS to output a VVT phase request to the controller.
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08-25-2008, 01:57 PM
#45
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I don't rightly know.
I kinda stepped back here for a while to see where this went. I'm not really clear on whether Abe intends to re-write the software to do crank-cam phase detection and thus implement closed-loop control, or whether we're content just running open-loop with the EBC map... I personally expect the latter would be sufficient, and wherever possible I try to avoid things like forking the code.
I kinda stepped back here for a while to see where this went. I'm not really clear on whether Abe intends to re-write the software to do crank-cam phase detection and thus implement closed-loop control, or whether we're content just running open-loop with the EBC map... I personally expect the latter would be sufficient, and wherever possible I try to avoid things like forking the code.
Well, I think I might skip the whole thing, deciding in the next couple days. But if I do, I'll start open loop, possibly progressing to PID.
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08-26-2008, 05:50 PM
#47
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it's the same sensor as your car but it's located on the top of the valve cover near the firewall. dont have any clear pictures of it. it's about 3 or 4 inches after the word MAZDA in the valve cover.
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08-27-2008, 01:11 PM
#49
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I was thinking of moving my sensor there, but I looked (for 10 seconds) under a friend's hood and thought the physical packaging of the sensor was different, and that it wouldn't fit....
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09-03-2008, 01:01 PM
#53
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TPS, MAP, and BATT_LIGHT? This *is* pretty involved.
Well, my VVT head should be in in a week or two, ready to go on the car in 3-4. So... well timed! :-)
How come you're never over on the DIYEFI.org boards?
Well, my VVT head should be in in a week or two, ready to go on the car in 3-4. So... well timed! :-)
How come you're never over on the DIYEFI.org boards?
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09-04-2008, 12:17 AM
#54
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The only thing missing is the AC_UP pin. Notice the pin on the bottom left, IACV. This circuit also acts as:
1) Battery light check (notice V_ALT), replaces stock ECU battery light.
2) IACV control with idle up.
3) VVT control
4) Immobilizer with support for car anti-hijacking (notice VSS, as soon as the car starts to move it stalls and doesn't catch again)
Jim
1) Battery light check (notice V_ALT), replaces stock ECU battery light.
2) IACV control with idle up.
3) VVT control
4) Immobilizer with support for car anti-hijacking (notice VSS, as soon as the car starts to move it stalls and doesn't catch again)
Jim
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09-04-2008, 12:17 AM
#55
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The only thing missing is the AC_UP pin. Notice the pin on the bottom left, IACV. This circuit also acts as:
1) Battery light check (notice V_ALT), replaces stock ECU battery light.
2) IACV control with idle up.
3) VVT control
4) Immobilizer with support for car anti-hijacking (notice VSS, as soon as the car starts to move it stalls and doesn't catch again)
Jim
1) Battery light check (notice V_ALT), replaces stock ECU battery light.
2) IACV control with idle up.
3) VVT control
4) Immobilizer with support for car anti-hijacking (notice VSS, as soon as the car starts to move it stalls and doesn't catch again)
Jim
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09-04-2008, 11:45 PM
#57
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Hear me now and believe me later:
http://www.y8spec.com/miata_tech/man/
http://www.y8spec.com/miata_tech/man/
Does that seem right? Anyway, thanks for pumping me up!
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