Our experience with roller finger followers has identified stability as a critical characteristic.
Instability can lead to excessive noise or ejection of the finger.
We have added to our analytical tools the capability to predict and map load vectors relative to valve train operational characteristics and geometry. This gives us the ability to study the system upfront and determine the potential for any of these problems early in the design process so improvements can be made most efficiently. In addition to basic kinematic studies, we rely on special analytical tools to focus on the valve train's interface with the Torrington bearing and finger follower assembly. Contact patch mapping on the cam lobe identifies the results of loading and interface geometry. This helps to predict potential failure modes.