Title: Modelling and validation of a novel continuously variable transmission system using slider crank mechanism

Authors: Muhammad Luqman Hakim Abd Rahman; Khisbullah Hudha; Zulkiffli Abd Kadir; Noor Hafizah Amer; Vimal Rau Aparow

Addresses: Department of Mechanical Engineering, Faculty of Engineering, National Defence University of Malaysia, Sungai Besi Camp, 57000 Kuala Lumpur, Malaysia ' Department of Mechanical Engineering, Faculty of Engineering, National Defence University of Malaysia, Sungai Besi Camp, 57000 Kuala Lumpur, Malaysia ' Department of Mechanical Engineering, Faculty of Engineering, National Defence University of Malaysia, Sungai Besi Camp, 57000 Kuala Lumpur, Malaysia ' Department of Mechanical Engineering, Faculty of Engineering, National Defence University of Malaysia, Sungai Besi Camp, 57000 Kuala Lumpur, Malaysia ' Department of Mechanical Engineering, Faculty of Engineering, National Defence University of Malaysia, Sungai Besi Camp, 57000 Kuala Lumpur, Malaysia

Abstract: Vehicle transmission system transfers torque and speed from the power source to drive wheels. Continuously variable transmission (CVT) system offers smooth ratio transition where it improves acceleration performance and reduces fuel consumption. Currently, most of the CVT system is actuated by the internal hydraulic circuit where compressibility of oil introduces non-linearity to the system causing difficulty in controlling CVT response. Therefore, a new free-hydraulic CVT system is developed to overcome the shortcomings in existing CVT. The proposed CVT system is designed based on belt-driven type which consists of two sets of variable pulley. Each set of variable pulleys is actuated by an electric motor using slider crank mechanism. The mathematical modelling of CVT mechanism is developed by using Lagrange formulation. The results from this study show that the simulation model of CVT mechanism can produce good performance behaviour in following desired radius position of the real CVT mechanism.

Keywords: model validation; continuously variable transmission; CVT; slider crank mechanism; Lagrange formulation.

DOI: 10.1504/IJESMS.2018.090239

International Journal of Engineering Systems Modelling and Simulation, 2018 Vol.10 No.1, pp.49 - 61

Received: 15 Jul 2016
Accepted: 01 Nov 2017
Published online: 06 Mar 2018 *

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