metering pin

metering pin

[′mēd·ə·riŋ ‚pin]
(engineering)

metering pin

metering pin
Needle-type mixture control system.
A flow-control device in a metering orifice used to vary the amount of fluid that can flow through it. The shape or contour of a metering pin determines the amount of fluid that can flow with the pin in any position other than fully in or fully out. It is used in shock absorbers in the undercarriage system and helps restrict the passage of fluid from one chamber to another, thus cushioning the landing impact. Also used in fuel-control systems.
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References in periodicals archive ?
The upstream pressure and cross-sectional areas in the upper and lower chambers do not have any influence, and a small variance is observed between the different metering pin types.
If observed carefully, the upstream pressure and cross-sectional areas in the upper and lower chambers and different metering pin types do not impact the orifice outlet velocity in an excessive way.
This orifice inlet pressure is not much subjective by the lower chamber diameter, upper chamber diameter, metering pin type, etc., but the flow area at the orifice and the mass flow rate mark a lot on this response parameter.
The interaction plot (Figure 16b) shows that the interaction of the flow area with the metering pin type has a substantial impact on the discharge value ([C.sub.d]), whereas the interaction of other parameters shows a very insignificant impact on the [C.sub.d] value.
The larger hole-top dead center-allows the metering pin to slide through.
With this final bounce, the housing seated onto the piston while the metering pin tried to come through the hole-yes, the same hole where I had placed my finger.