Wear prediction in internal combustion engine valve materials

FERNANDO ZENKLUSEN; SANDRO SILVA; CORDEIRO LINS; FEDERICO CAVALIERI; CÉSAR LUENGO; ALBERTO CARDONA

Sao Paulo

Congreso; 21 SAE BRASIL INTERNATIONAL CONGRESS AND EXHIBITION OF MOBILITY TECHNOLOGY; 2012

In internal combustion engine valves, wear often develops at the interface between the valve seat and the insert as a result of the high pressures produced by the combustion process during the closing event. A typical way of studying wear is by carrying out experimental tests in specific wear testing machines. The main drawback is that these tests are time consuming and expensive due to the need of carrying out many tests because of the usually observed scatter in the results. In the area of numerical methods, the wear simulation has been widely developed in last years because it can solve complicated time consuming problems with general geometries. The aim of this work is to characterize the wear rate coefficients for bi-metallic pairs commonly used in internal combustion engine valves using experimental results and numerical solutions by using the Finite Element Method. Then, the method is applied on a valve model to demonstrate the potential of numerical solutions for the design of these components.