Abstract
The vibration characteristics on the vertical axis of a four cylinder 1.4 L Otto engine was investigated under partial throttle opening rates and different engine speeds, in the study. In the first part of the study, vibration measurements were made in terms of acceleration on the top of engine block. The vibration data were determined in 5 partial throttle opening rates (%10, %20, %30, %40, %50) and for 4 engine speeds (1400 RPM, 2000 RPM, 3000 RPM and 4000 RPM) as RMS (Root mean square) and illustrated with graphs. With polynomial regression method, the characteristics equations for each throttle opening have been formed. In the second part, the measurements were made by changing engine speeds for each throttle opening and the obtained results were compared with the results determined from the equations.
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