Restriction gauge

[Trommel]

Guys
I have what I think is a fairly silly question about a restriction guage on an industrial diesel engine.

In the system we use, we have an outer and inner filter assembly leading to a turbocharger. In between there is a restriction indicator which sends a signal back to the engine when the filters are blocked (pressure difference between ambient and inside air intake is great enough)

I think the system works by sensing the deflection of a diaphragm.


Is this correct?
Are there any inherent problems with this system?

 

[MikeHalloran]

That's one way to do it.

A robust example is the Dwyer Magnehelic line of pressure gages/ indicators/ transducers.



Mike Halloran
Pembroke Pines, FL, USA

 

[MintJulep]

The problem is that pressure drop is a function of flow which is a function of engine rpm.

 

[Fabrico]

They are usually looking for maximum vacuum attained.

 

[GregLocock]

To put it another way, if the pressure drop is not significant, because the engine is not at full power, then it doesn't matter anyway.

Cheers

Greg Locock

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