System and method for measuring piston ring rotation

Details System and method for measuring piston ring rotation System and method for measuring piston ring rotation

1997-12-22

2000-12-05

Fuller, Benjamin R.

Measuring and testing

Brake testing

731173, 731181, G01M 1500, G01M 1900, G01L 326

Patent

active

061551090

ABSTRACT:
A system and method for measuring end gap position and rotation of rings on a piston reciprocating in an engine cylinder. Eddy current induction detectors are installed in ports extending through the cylinder wall spaced around the circumference. Signals are collected from each detector over a portion of the engine cycle for a number of revolutions, and the end gap position is associated with a detector having a significant variation in sensed induction currents.

REFERENCES:
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patent: 5258930 (1993-11-01), Fukuyoshi
patent: 5497669 (1996-03-01), Hafner
patent: 5744705 (1998-04-01), Derouen et al.
Haussler--"Sensor for Magnetically Scanning a Moving Element in an Internal Combustion Engine"--Nov. 26, 1996.
Rodriguez--"Method & Apparatus for Testing Piston Rings"--May 27, 1997.
Takegami--"Cylinder Discriminating Sensor Layout"--Mar. 15, 1994.
Ginns--"Engine Monitoring System"--Aug. 20, 1985.
Scourtes--"Methods & Apparatus for Testing Engines"--May 23, 1995.

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