In this investigation, worn valve seats and inserts have been examined to obtain a fundamental understanding of the primary wear mechanisms. Seats and inserts from a wide variety of engines were studied using optical and electron microscopy. The recessed region on seats and inserts displayed a common feature which can be described as a series of ridges and valleys formed circumferentially around the seat axis. These ridges and valleys were found to be due to either a relatively severe gouging process or to a milder deformation and wearing process. These processes were related to assembly and product geometry factors which caused misalignment between the seats and inserts.
Citation: van Diesel, R., Barber, G., Larson, J., and Narasimhan, S., "Engine Valve Seat and Insert Wear," SAE Technical Paper 892146, 1989, https://doi.org/10.4271/892146. Download Citation
Author(s):
R. van Diesel, G. C. Barber, J. M. Larson, S. L. Narasimhan
Affiliated:
Depart. of Mechanical Engineering University of Massachusetts Amherst, MA, Eaton Engine Components Division Engineering Center Marshall, MI
Pages: 12
Event:
1989 SAE International Fall Fuels and Lubricants Meeting and Exhibition
ISSN:
0148-7191
e-ISSN:
2688-3627
Related Topics:
Seats and seating
Wear
Microscopy
Assembling
Valves
Optics
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