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.
You can lead the horticulture but you can't make them think.
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
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
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
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.
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.
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.