Automotive engines equipped with camless valve-trains (so called camless engines) have been studied for over twenty years, but production vehicles with enignes of this type are still not available due to difficulties in ensuring adequate and reliable valve performance in this valvetrain. For an electromechanical camless valvetrain, the actuator noise caused by high contact velocities of the moving parts of the actuator has been identified as a key problem. With the idea of providing tools to address this problem, in this paper we develop a physics-based model for an electromechanical camless valve actuator. The model parameters are identified using appropriately constructed steady-state and transient experiments, and good agreement between the model and the experimental transient response tra-jectories is demonstrated. Finally, a sensitivity study is performed to characterize the ability of the control signal to affect the reduction of the contact velocities.
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