AU3404 Automotive Transmission Syllabus:

AU3404 Automotive Transmission Syllabus – Anna University Regulation 2021

COURSE OBJECTIVES:

The objective of this course is to prepare the students to gain knowledge in the construction and principle of mechanical transmission components, hydrodynamic devices, hydrostatic devices, automatic transmission system, Electric drive used in road vehicles.

UNIT I CLUTCH

Requirement of transmission system, Types of transmission system, Requirement of Clutches – Functions-Types of clutches, construction and operation of Single plate, multi plate and Diaphragm spring clutches. Centrifugal clutch, Electronic clutch.

UNIT II GEAR BOX

Purpose of gear box. Construction and working principle of sliding, constant and synchromesh gear boxes, Automatic manual transmission. Introduction to epicycle gear trains, Numerical examples on performance of automobile such as Resistance to motion, Tractive effort, Engine speed & power and acceleration. Determination of gear ratios for different vehicle applications.

UNIT III HYDRODYNAMIC TRANSMISSION

Fluid coupling – principles – Performance characteristics – advantages – limitations – drag torque – reduction of drag torque. Torque converter – principles – Performance characteristics – advantages – limitations – multistage and polyphase torque converters.

UNITIV HYDROSTATIC DRIVE

Hydrostatic drive; various types of hydrostatic systems – Principles of Hydrostatic drive system. Advantages and limitations. Comparison of hydrostatic drive with hydrodynamic drive, construction and working of typical Janny hydrostatic drive.

UNIT V AUTOMATIC TRANSMISSION AND ELECTRIC DRIVE

Wilson gear box- Cotal electric transmission. Chevrolet “Turboglide” transmission. – Four speeds longitudinally mounted automatic transmission -Hydraulic control systems of automatic transmission. Continuously Variable Transmission (CVT) –– types – Operations. Electric drivetypes- Principle of early and modified Ward Leonard Control system-Advantages & limitations – Automated Manual Transmission (AMT) – Modern electric drives.

COURSE OUTCOMES:

At the end of the course, students will be able to:
1. Understand the construction and working of various types of clutches
2. Determine the gear ratio for different vehicle applications
3. Describe the types and principle of hydrodynamic transmission
4. Compare Hydrostatic and hydrodynamics drives
5. Identify the differences among various automatic transmissions.

TEXT BOOKS:

1. Heinz Heisler, Advanced Vehicle Technology,2nd Edition,2002, Butterworth-Heinemann
2. Motor Vehicle, T. K. Garrett K. Newton W. Steeds, 13th Edition, 2000,ButterworthHeinemann

REFERENCES:

1. Crouse, W.H., Anglin, D.L., Automotive Transmission and Power Trains construction, McGraw Hill, 1976.
2. Held`t, P.M., Torque converters, Chilton Book Co., 1962.
3. Iqbal Husain, Electric and Hybrid Vehicles Design Fundamentals, CRC PRESS Boca Raton London New York Washington, D.C.

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