Paging Mueller, Bowlsby, Bleyseng and Jaroen |
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Paging Mueller, Bowlsby, Bleyseng and Jaroen |
r_towle |
Jan 11 2006, 08:07 PM
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#1
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Custom Member Group: Members Posts: 24,624 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States |
Hi guys,
Through a local DOD contractor I found a few small shops that will make Berillium Diaphrams... Apparently the new fighter jets use alot of the material, so they are set up to work with it, and do small runs... So , what I need, to get a price, is CAD drawings of the diaphram, and the piece that gets pressed into the middle.. I have been told that they can do it, based upon my description. So, did anyone ever make a drawing of the diaphram...or maybe please......mike...could you... Rich |
Dr Evil |
Jun 28 2006, 03:50 PM
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#2
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Send me your transmission! Group: Members Posts: 23,032 Joined: 21-November 03 From: Loveland, OH 45140 Member No.: 1,372 Region Association: MidAtlantic Region |
That is what I am reffering to in part. My MJLJ has a vaccume MPS that is the size of a quater. I was just looking over the brian schematics and it looks failrly straight forward. I just need the values that I should be shootinf for, or I will take a much longer time and rig up test connectors to a running car, yadda, yadda.
I am not saying I know it all, far from it. I'm just saying that I have not seen a reason not to consider this line of thinking. |
Demick |
Jun 28 2006, 10:58 PM
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#3
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Ernie made me do it! Group: Benefactors Posts: 2,312 Joined: 6-February 03 From: Pleasanton, CA Member No.: 257 |
I am not saying I know it all, far from it. I'm just saying that I have not seen a reason not to consider this line of thinking. There are a bunch of us who have thought about this. Like you point out, a pressure sensor that outputs a porportional voltage (or resistance) is easy to get. A standard MAP sensor is cheap and readily available that would do this (Megasquirt uses a MAP sensor like this). Unfortunately, to mimmic the MPS, you would need to take this signal and create an inductance value based on the amount of vacuum. A hefty inductance value at that (0 - 1.5H). I know of no voltage controlled variable inductor - especially at that kind of value. So this is where I get stuck. Not a simple problem. The other approach is not to mimmic the MPS exactly, but to understand how the ECU interprets this inductance, and create a circuit that does not output an inductance, but rather another type of signal that the MPS would be able to correctly interpret. But this goes way beyond my electrical capabilities. Demick |