Adjustment method for spark plug and apparatus therefor

Details Adjustment method for spark plug and apparatus therefor Adjustment method for spark plug and apparatus therefor

1997-04-03

1998-04-21

Raevis, Robert

Measuring and testing

Simulating operating condition

Marine

445 7, H01T 1320

Patent

active

057419639

ABSTRACT:
To improve the accuracy of the automatic adjustment of a spark plug and the adjustment of the eccentricity of a multiple-electrode spark plug, a spark plug holder 2 for supporting and fixing a lower portion of the multiple-electrode spark plug 1 and a positioning device 3 for supporting and positioning an upper portion of the multiple-electrode spark plug 1 are provided to an adjustor for automatically regulating the gap and the eccentricity of the multiple-electrode spark plug having a center electrode and at least one ground electrode. A projector 4 projects light to the multiple-electrode spark plug 1 from above the positioning device 3. A CCD camera 5 produces images of the spark gap/eccentricity of the multiple-electrode spark plug 1. An image processor 6 executes image processing for inputting the images from the CCD camera 5 and determining the spark gap/eccentricity. A hammering device 7 conducts a hammering operation for imparting a predetermined impact working pressure to the ground electrode on the basis of the spark gap/eccentricity. The image processing and the hammering operation are repeated until the spark gap/eccentricity are below predetermined values, respectively, so as to automatically regulate the spark gap/eccentricity.

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Symposium of the Japanese Society for Quality Control, Jun. 21, 1988, pp. 12-16: see p. 15, Figure 11.

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