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Transmission System Design for Power Transmission of an Internal Combustion Engine and Electric Motor to the Gearbox Input in a Hybrid Vehicle Drive System

Thesis Type: Postgraduate

Institution Of The Thesis: Yildiz Technical University, Faculty Of Mechanical Engineering, Deparment Of Mechanical Engineering, Turkey

Approval Date: 2021

Thesis Language: Turkish

Student: Doğukan Yıldız

Co-Supervisor: Alp Tekin Ergenç

Supervisor: Birgül Aşçıoğlu Temiztaş

Abstract:

Carbon emission, which is the most important effect of global warming, is a serious problem. Various studies have been carried out for vehicles to emit CO2 per unit km. However, the way to reduce emissions in the near future is through hybrid vehicles.

Parallel hybrid, serial hybrid, and power-sharing hybrid are the three forms of power transmission in hybrid vehicles. In some hybrid power transmission systems, the internal combustion engine can contribute directly to the movement of the vehicle. In some hybrid power transmission systems, the internal combustion engine does not contribute directly to the movement of the vehicle. The most important purpose is to transmit the power obtained from the internal combustion engine and electric motor to the gearbox and wheels with no problems.

In this thesis, an experimental process has enabled the internal combustion engine and electric motor to transmit power to the gearbox input independently of each other. In order for the internal combustion engine to transmit power to the gearbox input instead of a dry type clutch, an electromagnetic clutch that allows the amount of torque transmission and clutch status to be controlled by electronic signals is used. The power transmission of the electric motor to the gearbox input is realized by a chain-gear mechanism. A one-way clutch is used to transmit power to the gearbox input of the electric motor independently of the internal combustion engine. With this clutch, the electric motor is prevented from rotating the internal combustion engine and the power transmission of the internal combustion engine and the electric motor is provided independently. In this study, the system validated the process experimentally.