In this work the explicit finite elements method (FEM) was used
to verify the technical feasibility of a passenger car cylinder
head valve seats insertion process, under interference, at ambient
temperature.
In current production process, valve seat rings nitrogen
chilling is used to make rings penetration easier at the cylinder
head. The proposed valve seats insertion process eliminates
nitrogen chilling, maintaining current processes speed and force
parameters. A new valve seat external profile was used to reduce
stress during insertion process. With the ring chilling removal,
tensions and strains on the head and rings tend to be more
critical.
This simulation's main objective is to evaluate the proposed
cylinder head valves seats insertion production process
effectiveness. This will allow forecasting and solving productive
process problems before its implementation, and foreseeing final
product quality.
The explicit finite elements method is normally used to simulate
stamping processes or crash tests. The proposed application shows
that the method can be used in other areas including
powertrain.