1931-01-01

Recent Developments in Poppet Valves 310007

AFTER stating that increased speed, mean effective pressure and piston displacement of engines have made valve conditions more difficult during the last few years, the author recalls the path which development has followed by a brief list of materials and methods of cooling.
Where the stem joins the head is the hottest part of the valve. A shield for this point is shown, also a shroud to protect the end of the valve-stem guide. Cooling the valve increases its life. Salt and sodium cooling are compared, and methods of sealing the coolant in place are described.
The construction and behavior of copper-cooled valves are illustrated and recounted, and a one-piece hollow-head valve is described. Reasons for valve-seat inserts are given.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Members save up to 18% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:
TECHNICAL PAPER

Fluid Sealability of Gasket Materials-New Test Fixture, Instrumentation and Test Results

900115

View Details

TECHNICAL PAPER

The Effect of Off-Design Operation on the Thermal Performance of Propylene-Glycol and Ethylene-Glycol Engine Coolants

971827

View Details

STANDARD

Fire Test Equipment for Flexible Hose and Tube Assemblies

AIR1377B

View Details

X