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 Kistler piezoelectric sensor or fiberoptic combustion sensor

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AuteurMessage
Vortex



Nombre de messages : 41
Localisation : Luxembourg
Date d'inscription : 26/11/2013

MessageSujet: Kistler piezoelectric sensor or fiberoptic combustion sensor   Lun 16 Jan 2017 - 20:23

Hi guys,
Did someone of you monitoring combustion cycle test's by using high speed port pressure sensors, exhaust pipe back pressure sensor together with a combustion sensor in 2 stroke race engines?
If yes, which one did you use, piezoelectric (Kistler) or fiberoptic sensors?
Most conventional brand name logging systems use 50 to 1000 samples per second/channel, which is fine since the sensors attached to conventional logging systems such as EGTs, O2 sensors etc. are slow speed sensors. The high speed pressure sensors that have to be used with this equipment require very high speed data logging.
Very high sampling speeds are required to record this pressure data per degree of crankshaft rotation.
I have a quotation from a brand who promise me up to 3.600.000 samples per second total throughput with fiberoptic sensors!
The system is based on 1 combustion sensor with thermal compensation together with 1 exhaust port sensor, 1 transfer port sensor, 1 intake high speed port pressure sensor and 1 exhaust pipe back pressure sensor and finally the crank trigger.
Together with a specific 2 stroke software we achieve near 15.000 € with this fiberoptical technology.
I don't know what to do and hope that someone can guide me, knowing that it is a fact that the Kistler sensors are at least 5 times more expensive than this.
But, if it does not going to work at 100% it makes no sense to invest this money at all.
Any help will be appreciated.
Thank you in advance
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Bob van der Zijden



Nombre de messages : 94
Localisation : Hollande
Date d'inscription : 10/09/2013

MessageSujet: Re: Kistler piezoelectric sensor or fiberoptic combustion sensor   Sam 21 Jan 2017 - 20:40

There is no better than Kistler, world market leader but this has it's price. All major engine labs use mainly Kistler. Optrand is not a bad option but the real breakthru at the highest development level has not yet been materialised. For less demandinding purposes with a limited budget Optrand has a good price-quality ratio. I met Wlodarcyk the Optrand inventor several times in the 90ties when he introduced his first sensor, he developed it working at GM and took it with him! At this vey moment the Optrand sensors are very small indeed and you can accomodate one in a regular spark plug. Advantage over Kistler is that there is no EM interference which can be troublesome with Kistler if you are using mega ignition power that fe MSD cdi's and other deliver. The latest from MSD the Digital 7Plus is an extremely powerful cdi. If Iwere you I'd go for Optrand.
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Vortex



Nombre de messages : 41
Localisation : Luxembourg
Date d'inscription : 26/11/2013

MessageSujet: Re: Kistler piezoelectric sensor or fiberoptic combustion sensor   Dim 22 Jan 2017 - 12:27

Bob van der Zijden a écrit:
There is no better than Kistler, world market leader but this has it's price. All major engine labs use mainly Kistler. Optrand is not a bad option but the real breakthru at the highest development level has not yet been materialised. For less demandinding purposes with a limited budget Optrand has a good price-quality ratio. I met Wlodarcyk the Optrand inventor  several times in the 90ties when he introduced his first sensor, he developed it working at GM and took it with him! At this vey moment the Optrand sensors are very small indeed and you can accomodate one in a regular spark plug. Advantage over Kistler is that there is no EM interference which can be troublesome with Kistler if you are using mega ignition power that fe MSD cdi's and other deliver. The latest from MSD the Digital 7Plus is an extremely powerful cdi. If Iwere you I'd go for Optrand.

Thank you Mr. Van Der Zijden,
I appreciate your statement, i think i will opt for the optical way.
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