cheap cylinder pressure sensor option - smart diesel glow plug with pressure sensor

Hardware inside and outside of the ECU
KLAS
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Re: cheap cylinder pressure sensor option?

Post by KLAS » Thu Nov 16, 2017 1:32 pm

i've been told GM uses ion sensing here in Europe in some Opel engines, like this one https://www.ebay.de/itm/OPEL-VAUXHALL-2 ... 1438.l2649

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Re: cheap cylinder pressure sensor option?

Post by russian » Thu Nov 16, 2017 2:42 pm

KLAS wrote:i've been told GM uses ion sensing here in Europe in some Opel engines, like this one
this looks similar to the SAAB ignition cassete? the obvious down side of the cassete is that it would be impossible to fit it on a different engine. I wish there was some individual coil option from a standart ion sensing setup, ideally with some smart and documented coils :lol:
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Re: cheap cylinder pressure sensor option?

Post by KLAS » Thu Nov 16, 2017 6:44 pm

yes, similar, i guess because GM once bought SAAB. maybe you could remove the little box and "free" the rest of the cassete from unneeded plastic? the connector from the box to the cassete looks like the regular GM connectors.
i know SAAB used such rails, but also seperate boxes for ion sensing. maybe such would be of any help?

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Re: cheap cylinder pressure sensor option?

Post by russian » Thu Nov 16, 2017 6:46 pm

KLAS wrote:i know SAAB used such rails, but also seperate boxes for ion sensing. maybe such would be of any help?
need more specific keywords. exact part numbers or model/year of the vehicle?
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Re: cheap cylinder pressure sensor option?

Post by Abricos » Fri Nov 17, 2017 12:07 am

maybe
https://www.eeuroparts.com/Parts/35189/ ... -55352173/

SAAB 55352173
SAAB: 9-3 2005-11

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Re: cheap cylinder pressure sensor option?

Post by andreika » Fri Nov 17, 2017 7:43 am

To get an idea of what it does:
ion-sensing-module-diagram.gif
ion-sensing-module-diagram.gif (53.31 KiB) Viewed 1653 times
It processes an analog ion signal directly from coils and outputs 2 digital signals for ECU: Knock detection & C.Q. (combustion quality).

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Re: cheap cylinder pressure sensor option?

Post by mck1117 » Sat Nov 18, 2017 2:22 am

And here's a schematic for the older T7 ignition casette:

Image

Here's a page with a description of some of the functionality: http://www.vems.hu/wiki/index.php?page=SaabCdiCassette

I may go to the junkyard this weekend and grab the ignition system off of a 2003+ 9-3, and crack the module open.

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Re: cheap cylinder pressure sensor option?

Post by russian » Sat Nov 18, 2017 2:45 pm

mck1117 wrote:ignition system off of a 2003+ 9-3, and crack the module open.
Would love to see how it looks inside!
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KLAS
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Re: cheap cylinder pressure sensor option?

Post by KLAS » Mon Nov 20, 2017 3:53 pm

Abricos wrote:maybe
https://www.eeuroparts.com/Parts/35189/ ... -55352173/

SAAB 55352173
SAAB: 9-3 2005-11
yes, that's the one

and i found this company http://www.sensata.com/sensors/automoti ... r-cpos.htm
looks like they make pressure only sensors for IC engines, don't know how much they are

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Re: cheap cylinder pressure sensor option?

Post by Abricos » Sat Aug 10, 2019 3:41 pm

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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Abricos
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Re: cheap cylinder pressure sensor option?

Post by Abricos » Wed Aug 21, 2019 10:36 pm

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
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en-psg-pressure-sensor-glow-plug.pdf
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Last edited by Abricos on Wed Aug 21, 2019 11:39 pm, edited 2 times in total.

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Re: cheap cylinder pressure sensor option?

Post by Abricos » Wed Aug 21, 2019 11:00 pm

It looks like several companies are working together on the same sensor - pictured as separate pressure sensor on the right, but in reality integrated into smart diesel glow plug.
https://hirschmann-automotive.com
https://www.hidria.com
https://www.beruparts.eu
https://www.borgwarner.com
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Attached a PDF about smart spark plug which is another option.
Pressure_Model_6117B.pdf
(270.02 KiB) Downloaded 30 times

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Re: cheap cylinder pressure sensor option?

Post by russian » Sun Sep 22, 2019 12:06 pm

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."

This engine is not available in US yet and they might have only started selling it https://www.caranddriver.com/news/a2775 ... urope-mpg/
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Re: cheap cylinder pressure sensor option - smart diesel glow plug with pressure sensor

Post by russian » Sat Nov 09, 2019 7:07 pm

Some dimensions and installation example see viewtopic.php?f=3&t=1630&p=34911#p34911
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Re: cheap cylinder pressure sensor option - smart diesel glow plug with pressure sensor

Post by russian » Sun Nov 10, 2019 5:24 am

@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!
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Re: cheap cylinder pressure sensor option - smart diesel glow plug with pressure sensor

Post by russian » Fri Nov 22, 2019 1:17 am

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.

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Re: cheap cylinder pressure sensor option - smart diesel glow plug with pressure sensor

Post by puff » Fri Nov 22, 2019 5:16 am

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.

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Re: cheap cylinder pressure sensor option - smart diesel glow plug with pressure sensor

Post by kb1gtt » Fri Nov 22, 2019 6:49 am

Can you capture a picture with a sync pulse at TDC?
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Re: cheap cylinder pressure sensor option - smart diesel glow plug with pressure sensor

Post by russian » Fri Nov 22, 2019 7:00 am

kb1gtt wrote:
Fri Nov 22, 2019 6:49 am
Can you capture a picture with a sync pulse at TDC?
I think what we can is add second probe for cam sensor and have complete revolution on the screen?
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