Analysis Of Hatchback Car Between Manual And CVT Transmission Systems

Engku Ariff, Engku Amirul Rashidin (2019) Analysis Of Hatchback Car Between Manual And CVT Transmission Systems. Masters thesis, Universiti Teknikal Malaysia Melaka.

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Nowadays, many of the research studies in automotive fields conducted by most well­ known universities around the world cover a wide range of key areas such as engine, transmission, control system and safety system so as to carry out a new design and innovation. Furthermore, in Malaysia most of the car owners have a high interest in exploring the vehicle performance of their own vehicles. Thus, several types of modifications have been performed with intention to enhance the vehicle performance optimally. However, in order to reduce the cost and time, the new design, innovation and modification should be initially executed with simulation software by modeling the complete vehicle before experimented with the actual prototype. Therefore, as to fulfil the purpose, a vehicle longitudinal dynamic model is developed in this study by using simulation software with mathematical equation based method. The main model is divided into two models due to the two different types of transmission systems; 5-Speed manual transmission (MT) and Continuously Variable Transmission (CVT). The main system for each model consisted of several subsystems namely engine dynamics, gearbox controller, speed converter, traction force, rolling force, aerodynamic drag force, vehicle longitudinal motion and traction torque. The car that is used as a testing vehicle is Proton Suprima Hatchback. It is equipped with 1.6 cc turbocharger spark ignition four-stroke internal combustion engine with electronic fuel injection system as the main power source. The complete vehicle is studied under dynamic conditions and it is simulated in longitudinal direction. Commonly, a moving vehicle in longitudinal direction will be encountered with various driving resistances such as aerodynamic drag resistance, rolling resistance, climbing resistance and acceleration resistance which can reduce its overall performance. For the aim of investigating the performances, its result is measured in the aspects of vehicle velocity, traction torque and vehicle power. Hence, the results between these two models are compared due to determine the optimum performances. MATLAB Simulink software is used for modeling the vehicle longitudinal dynamic and the vehicle parameter from the car manufacturer is used as the input and output values in the simulation software. The analysed result indicated that at the starting point of vehicle movement, CVT model can produce more speed than the MT model until certain range of time where the MT model is exceeded the velocity of CVT model. Besides, at the traction torque point of view, it showed that the CVT model had higher efficiency on the variator shift up transition, while MT model had a higher traction torque at the end of acceleration point. More or less than the result of velocity and traction torque, the vehicle power of CVT and MT model have produced a similar value at the start-off point. Although the CVT model has showed the superiority over MT model at middle range of vehicle power, at the end of the acceleration the MT model has produced more power than the CVT model.

Item Type: Thesis (Masters)
Uncontrolled Keywords: Motor vehicles - Dynamics, Motor vehicles - Dynamics - Mathematical models, Automobiles - Transmission devices, Automatic
Subjects: T Technology > T Technology (General)
T Technology > TL Motor vehicles. Aeronautics. Astronautics
Divisions: Library > Tesis > FKM
Depositing User: Mohd Hannif Jamaludin
Date Deposited: 31 Dec 2019 10:29
Last Modified: 31 Dec 2019 10:29
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