New Kinematic Design Methodology and Dynamic Simulation of Continuously Variable Valve Lift (CVVL) System

Bukovnik, Sasa; Parikyan, Tigran; Resch, Thomas; Hellinger, Wolfgang

doi:10.4271/2010-01-1202

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2016

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“…As opposed to the conventional valve train systems, in which the valve motion is fixed just as a function of the camshaft angle of rotation [1][2]. The continuously variable valve actuation (CVVA) mechanism can vary the valve open duration and maximum lift continuously, so that to provide greater flexibility in valve event control compared to conventional valve trains [3][4][5][6][7][8][9]. In this paper, a simple mechanical CVVA mechanism is proposed, and the dynamic behaviors are described in VALDYN software.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Analysis of one Continuously Variable Valve Actuation Mechanism based on VALDYN

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2016

Advances in Computer Science Research

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Abstract-A simple mechanical CVVA system as a four-bar linkage mechanism is characterized by compactness, and it offers certain benefits in terms of adaptation to various cylinder head configurations, which is conducive to improve engine performance greatly is introduced in this paper. The CVVA mechanism consists of a four-bar linkage, a rotating first cam and two oscillating second cams in addition to the conventional overhead camshaft valve train system. The construction of the model and the dynamic analysis is also fully proposed in VALDYN software. The simulation results demonstrate that the CVVA mechanism has the capacity to sustain proper performance in the valve lift and valve timing across the whole speed range.

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