Prevention of Valve-Seat Erosion
310008
01/01/1931
- Event
- Content
- MORE THAN SEVEN YEARS of investigation of the problem of preventing valve-seat erosion under severe operating conditions in motor-truck and motorcoach engines are reviewed briefly. Engineers are said now to be generally agreed that an insert of some non-ferrous material is the only means of obtaining a valve seat that will stand severe service.A theory for the cause of a thin spotty deposit or pick-up on the valve seat that accelerates erosion is advanced, and this deposit is said to be absent on valve seats made of non-ferrous metals. Aluminum bronze gives satisfactory results but is difficult to secure to cast-iron cylinder-blocks because of its greater coefficient of expansion.Several partially successful methods of securing aluminum-bronze rings to cast iron are shown. A method that is applicable to one alloy which has reduced erosion under the most severe operating condition to such an extent that it is almost negligible is described.
- Pages
- 4
- Citation
- Getzoff, E., "Prevention of Valve-Seat Erosion," SAE Technical Paper 310008, 1931, https://doi.org/10.4271/310008.