chevydan6 wrote:DO IT! Where on a neon sohc without hitting water jacket...
SOHC
Not really ready to drill my DOHC Miata head. Time to buy DOHC v12 something
Re: cheap cylinder pressure sensor option?
Posted: Mon Sep 14, 2015 4:54 pm
by abecedarian
One thought might be to open up the spark plug boss and fabricate an insert that could thread in which would supply a "tap" out to the pressure sensor while retaining the spark plug.
Depending on the spark plug design- insulator length and such, might even be able to drill and tap the spark plug itself to provide a port for a pressure sensor.
... or not.
Re: cheap cylinder pressure sensor option?
Posted: Mon Sep 14, 2015 6:23 pm
by Abricos
It is a very expensive pressure sensor for 2000 bar it's cost 500$ ...I can not find something cheaper ...
Re: cheap cylinder pressure sensor option?
Posted: Mon Sep 14, 2015 11:31 pm
by kb1gtt
The ebay link in the first post is $25 usd.
Re: cheap cylinder pressure sensor option?
Posted: Tue Sep 15, 2015 1:51 am
by Abricos
Re: cheap cylinder pressure sensor option?
Posted: Mon Dec 07, 2015 9:51 am
by 3gAccord
This may be a bit old thread... But why add a sensor? Why not do coil on plug with ion sensing? It'd be much simpler in the long run than head mods
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Re: cheap cylinder pressure sensor option?
Posted: Mon Dec 07, 2015 10:27 am
by 3gAccord
In short, using the plug gap as a sensor. It's definitely complicated but not impossible magic.
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Re: cheap cylinder pressure sensor option?
Posted: Mon Dec 07, 2015 4:55 pm
by 3gAccord
Seems like it'd be the cheapest route. Bosch actually makes a module that connects to their coil on plug units. It'd take some interfacing but it allows very accurate knock prevention in higher end vehicles these days
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Re: cheap cylinder pressure sensor option?
Posted: Mon Dec 07, 2015 4:57 pm
by AndreyB
3gAccord wrote: Bosch actually makes a module that connects to their coil on plug units.
Sounds like you want to start a new topic on ion sensing since this topic is on cheap cylinder pressure sensor option...
Re: cheap cylinder pressure sensor option?
Posted: Fri Aug 26, 2016 6:44 pm
by AldoQ
Hi
i like to test this sensor, $30 in ebay its ok to experiment, maybe the sensor attached to stainless steel tubing then welded to spark plug
best regrads
Re: cheap cylinder pressure sensor option?
Posted: Fri Aug 26, 2016 9:17 pm
by Abricos
AldoQ wrote:Hi
i like to test this sensor, $30 in ebay its ok to experiment, maybe the sensor attached to stainless steel tubing then welded to spark plug
best regrads
You need pressure sensor for 2000 bar
Re: cheap cylinder pressure sensor option?
Posted: Fri Aug 26, 2016 9:44 pm
by stefanst
Abricos wrote:
AldoQ wrote:Hi
i like to test this sensor, $30 in ebay its ok to experiment, maybe the sensor attached to stainless steel tubing then welded to spark plug
best regrads
You need pressure sensor for 2000 bar
I don't think so. Afaik peak cylinder pressure in gasoline engines is usually 1000psi and lower. So maybe 70bar.
Re: cheap cylinder pressure sensor option?
Posted: Sat Aug 27, 2016 12:06 am
by Abricos
Oppss sorry not bar ... 2000psi ...
For basic engine ...
Look PDF
Re: cheap cylinder pressure sensor option?
Posted: Sat Aug 27, 2016 12:31 am
by AldoQ
hi
the beru pressure sensor is for 200 bar
regards
Re: cheap cylinder pressure sensor option?
Posted: Sun Aug 28, 2016 8:01 pm
by AndreyB
AldoQ wrote:hi
to spark plug just to tune the spark map , is possible ?
regards
what exactly are you asking about? is it possible to get the sensor somehow into the cylinder? I believe no one here has such experience.
is it possible to read the value from the sensor and display it in the rusEfi console? that would be an easy change, that would be similar to how you can see MAP sensor reason within one engine cycle.
Re: cheap cylinder pressure sensor option?
Posted: Sun Aug 28, 2016 8:10 pm
by AldoQ
if i find the way to use the glow plug to read the pressure in the cylinder, the signal can be used to tune the spark map?
VW Audi Glow plug conector with wire harness for the "smart" glow plugs used on the 2.0L Common-Rail
OEM Part Number: 03L971785A? or maybe 04L971785?
Same connector pictured with and without end plastic cover
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Re: cheap cylinder pressure sensor option?
Posted: Wed Aug 21, 2019 10:36 pm
by Abricos
in first post link (it seems to me very important) does not work as the web site does not exist ...
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CR glow plug pinout:
1. power (3v if I'm reading this bentley notations correctly)
2. signal to ecu
3. ground
4. glow from J179 automatic glow time control module
FB says "The Skyactiv X reportedly features realtime individual cylinder pressure monitoring. A pressure sensor is mounted in the cylinder. US Patent 9,719,441 shows a lot of detail on this subject."
@andreika is wondering if Vauxhall / opel 55577669 / opel 2081555 harness uses the same connector. Sweet thing about the Opel harness is that we get 4 plugs for about $20 used!
Opel Astra J 2010-2017
Opel Insignia 2008-2017
Opel Zafira C 2013-2019
GM glow plug part numbers 55579436 and 55590467, opel PN 1214087
Thread Size M9x1.0mm
Spanner Size 12 mm. "Spanner" means wrench in British
Maybe we have the first video of the sensor output? Very unclear
The formula in first message says voltage goes up with pressure, why do we have such a clear drop in voltage? That's if we have randomly chosen good trigger setting on oscilloscope.
100ns per division? so, the drop duration is even below 100ns? do you know what's inside that sensor? it's design? may be, there is a certain ciruitry there which causes that drop?
it's a cylinder sensor, which means - the measurements should have a certain pattern (according to engine cycle)?
I'd try to figure out the duration of the whole cycle at your idle and make the time scale of the scope match it.