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Engine Valve Seat and Insert Wear
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English
Abstract
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.
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Authors
- R. van Diesel - Depart. of Mechanical Engineering University of Massachusetts Amherst, MA
- G. C. Barber - Depart. of Mechanical Engineering University of Massachusetts Amherst, MA
- J. M. Larson - Eaton Engine Components Division Engineering Center Marshall, MI
- S. L. Narasimhan - Eaton Engine Components Division Engineering Center Marshall, MI
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.Also In
References
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- Narasimhan, S.L. Larson, J.M. Valve Gear Wear and Materials SAE Paper No. 851497 1985
- Johnson, V.A. Galen, C.W. Diesel Exhaust Valves SAE Paper No. 660034 1966
- Newton, J.A. Some Aspects of Valve Burning and Sticking SAE Preprint No. 86, Presented at the SAE National Fuels and Lubricants Meeting Tulsa, Oklahoma November 1947
- Zinner, K. Investigations Concerning Wear of Inlet-Valve Seats in Diesel Engines ASME Paper No. 63-OGP-1 1963
- Tauschek, M.J. Newton, J.A. Valve Seat Distortion SAE Preprint No. 64, Presented at the SAE National Passenger Car, Body and Materials Meeting Detroit, Michigan March 1953