The internal combustion (IC) engine has relied on the mechanical camshaft for over a century to manage gas exchange. However, the fixed geometry of cam lobes necessitates a compromise between low-speed torque and high-speed power. This article explores the conceptual design and feasibility of a "camless" valve actuation system, specifically focusing on electro-hydraulic and electro-mechanical architectures. By decoupling valve timing from the crankshaft position, such systems offer the potential for significant improvements in fuel economy, emission reduction, and power density. This study reviews the mechanical requirements, control challenges—primarily the "soft landing" of valves—and the feasibility of integrating these systems into modern passenger vehicles based on the technological constraints identified between 2009 and 2012.
Ravishankar M K (Sun,) studied this question.