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Video Cylinder - Crank Drive
Video Piston 1
Video Piston 2
Video Piston 3
Video Piston 4
Video Piston - history
Video Piston - in general
Video Piston - material
Video Piston - stress
Video Piston - dimensions
Video Piston - measuring
Video Piston - truck
Video Piston Pin
Video Piston Pin Offset
Video Piston Rings 1
Video Piston Rings 2
Video Piston Rings 3
Video Connecting Rod
Video Crankshaft-history
Video Crankshaft 1
Video Crankshaft 2
Video Crankshaft 3
Video Crankshaft 4
Video Crankshaft 5
Video V-2 Crankshaft 6
Video Crankshaft 7
Video Bearing Play Check
Video Forces crank mechanism
Video Rot. Vibration Damper
Video Equaliser Shafts 1
Video Equaliser Shafts 2
Video 5-cyl. Block
Video Fly Wheel
Video Cylinder Block 1
Video Cylinder Block 2
Video Cylinder Block 3
Video Cylinder Block 4
Video Cylinder Block 5
Video Cylinder Block 6
Video Measurements
Video Loop Scavenging
Video Classic Racing Engine
Video V8 Cylinder Block
Video V8 Crankshaft 1
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Video V10 Cylinder Block
Video V12 Cylinder Block
Video W12 Cylinder Block
Video W8 Cylinder Block

Video CO2-Emissions
Video Torque
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Video Hollow Cylinder
Video Bore Stroke Ratio
Video Cubic Capacity
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Video Efficiency
Video Calc. Crank Mechan.
Video Pistin Force
Video Compression Ratio
Video Pistin Speed
Video Power (output)
Video Power (piston pressure)

Video Multi-cylinder engine 1
Video Multi-cylinder engine 10


          A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Cylinder Diameter Measurement





Assignment

The measuring of the cylinder diameter leads to a more exact analysis of the state of wear and tear. In this case, one can decide which repair possibilities are open, or whether a repair must take place at all. Apart from the pure measuring, a visual examination is also important. The eveness of the cylinder and its sealing surface can be checked with a straight-edge ruler.

Function

In the above picture, one can see how an inside micrometer is brought into position to correctly determine the diameter. Important requirements:
- The instrument must be held vertical, so that a higher value is not shown.
- The highest wear is to be expected a little below TDC.
- It should be measured at about 90 to the longitudinal direction.

The calibration of the micrometer is particularly important. Measuring plates of an exact length are placed into a test-plate holder, In such a way as to allow an exactly defined gap. The micrometer can then be placed into this gap to set the baseline value. The piston-play varies greatly according to temperature and the measuring direction. In a cold state, and at 90 to the pin direction, it amounts to roughly 0,04 mm. 02/11




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Translator: Don Leslie - Email: lesdon@t-online.de

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