International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395 -0056
Volume: 04 Issue: 03 | Mar -2017
p-ISSN: 2395-0072
www.irjet.net
LATEST TRANSMISSION TECHNOLOGIES IN PASSENGER CARS- A Review Mr. pranay kale1, Mr. pravin kadam2, Mr. Shubham kale3, Mr. Anup jumbade4, Mr. C. J. Shende5 1Final
Year Student, Mechanical Engineering, DES’sCOET Dhamangaon (Rly), Maharashtra, India Year Student, Mechanical Engineering, DES’sCOET Dhamangaon (Rly), Maharashtra, India 3Final Year Student, Mechanical Engineering, DES’sCOET Dhamangaon (Rly), Maharashtra, India 4Final Year Student, Mechanical Engineering, DES’sCOET Dhamangaon (Rly), Maharashtra, India 5Assistant Professor, Mechanical Engineering, DES’sCOET Dhamangaon (Rly), Maharashtra, India ---------------------------------------------------------------------***--------------------------------------------------------------------2Final
Abstract - A transmission system in automobile consists
of a gear box and differential. A differential is a component used to distribute torque and helps while turning. It also provides better drivability. In this paper we are going to use a component that can transmit torque from the engine without a differential and act as automatic transmission. The purpose of this is to overcome the short coming of differential and provide automatic transmission for better drivability. For this, we have developed a component that will be connected through a gear array. It will act as automatic transmission. The electronic control units of automatic transmissions have been greatly advanced to make smooth gear shifting and improve fuel economy. Along with it, the solenoid valves as electro-hydraulic actuators have been rapidly developed which have high pressure and large flow capacity. Control system, direct active shift control. Key Words: Automatic Transmission, Direct Active Shift Control, Full Electronic Control System.
1.INTRODUCTION 1.1 History: Through the years, there have been many efforts to improve the transmission for better fuel economy, drivability and other quality of vehicle operations. In a road vehicle, the functions of transmission are to match the running state of engine to the motion states of the vehicle. Among these studies, many were focused on modifying the transmission designs to keep the vehicle safe and controllable, and to make passengers more comfort introducing mechatroinic systems in automobile transmissions. Mechatronic is the engineering discipline concerned with the construction of systems incorporating mechanical, electrical and information technology components. Today, mechatronic is an area combining a large number of advanced techniques © 2017, IRJET
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Impact Factor value: 5.181
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from engineering, in particular sensor and actuator technology, with computer science methods. The purpose of transmission system is to provide high torque at the time of starting, hill climbing, accelerating and pulling a load. The vehicle will have to face the resistances like wind resistance, gradient resistance and rolling resistance. The tractive effort is different at various speeds. The variation of total resistance to the vehicle motion should be equal to the tractive effort of the vehicle at any given speed. A transmission basically transfers the power from a car’s engine to drive shaft and the wheels. The gears present inside the transmission change the drive wheel speed and torque in relation to the engine speed and torque (pulling power), Lower gear ratios helps the engine to build up enough of power so that the car can easily accelerate from a halt. The transmission is a device that is connected to the back of the engine and sends the power from the engine to the drive wheels. An automobile engine runs at its best at a certain RPM (Revolutions per Minute) range and it is the transmission's job to make sure that the power is delivered to the wheels while keeping the engine within that range. It does this through various gear combinations. In first gear, the engine turns much faster in relation to the drive wheels, while in high gear the engine is loafing even though the car may be going in excess of 70 MPH.
1.2 Objective of Study
To provide a historical overview of the manual, automatic and automated transmission content in the major markets. To examine and draw conclusions on the factors which influenced adoption. To compare the new technical options for the future and their relative strengths and weaknesses in both economic and performance terms. To identify the trends for the future and the key players involved..
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