| A feasible method for significantly enhancing automotive engine efficiency is through direct actuation of intake and exhaust valves with electrome-chanical solenoids. Improvements of volumetric efficiency, fuel economy and emissions reduction while improving engine output have been demonstrated within laboratory settings, typically with electro-hydraulic or motor driven systems. Due to the highly non-linear physical relationships inherent to electromagnetic devices, design and control of such actuators has proven to be exceptionally challenging. To better predict actuator performance prior to prototype construction, a parametric Finite Element Analysis (FEA) model of a proposed actuator design was developed and validated with an existing physical prototype. The results from the FEA are incorporated within a lumped parameter model for control development and performance assessment. Consequently, a more accurate representation of alternate actuator designs can be investigated for control development, allowing for any subsequent design revisions to be made prior to costly prototype fabrication. |
