A component found in modern internal combustion engines, these devices form part of a variable valve timing (VVT) system. They enable the engine’s computer to independently adjust the camshaft timing, relative to the crankshaft. An example illustrates their function: at low engine speeds, the valve timing may be adjusted to improve fuel efficiency, while at higher speeds, the timing is altered to enhance power output. This adjustment happens dynamically, adapting to the engine’s operational needs.
The adoption of these mechanisms offers several advantages, including increased fuel economy, reduced emissions, and improved overall engine performance across the RPM range. Historically, fixed valve timing limited engine efficiency. The introduction of VVT, utilizing the described components, represented a significant advancement in engine technology, allowing for more precise control over the combustion process and optimizing performance under varying driving conditions.
