Measuring and testing – Internal combustion engine or related engine system or... – Compression
Patent
1986-10-06
1987-12-08
Levy, Stewart J.
Measuring and testing
Internal combustion engine or related engine system or...
Compression
G01M 1500
Patent
active
047111208
ABSTRACT:
A method of monitoring the cylinder wall wear using ultrasonic phase comparison techniques is disclosed. The method comprises the steps of introducing ultrasonic waves in a cylinder wall so that the waves travel through the cylinder wall. A change in the traveling time of the ultrasonic waves traveling through the cylinder wall due to cylinder wall wear is determined. The amount of wear of the cylinder wall is calculated by multiplying the velocity of the ultrasonic waves in the cylinder wall by the traveling time change due to cylinder wall wear. The traveling time change due to cylinder wall wear is obtained by determining the actual change in travel time by a phase comparison of the traveling ultrasonic waves and adjusting the actual change in travel time to compensate for any change due to temperature variation of the cylinder wall. With this method, small changes in traveling time on the order of 10.sup.-11 second can be determined so that thickness changes due to wear on the order of 5.times.10.sup.-4 mm are possible.
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Alcazar David G.
Birring Anmol S.
Hendrix Gary J.
Kwun Hegeon
Singh Gurvinder P.
Association of American Railroads
Levy Stewart J.
Raevis Robert R.
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