## AT6503 - VEHICLE DESIGN AND DATA CHARACTERISTICS (Syllabus) 2013-regulation Anna University

AT6503

VEHICLE DESIGN AND DATA CHARACTERISTICS

LPTC

3003

OBJECTIVES:
• Students have to collect important technical specifications of an automobile from Automobile Journals and keeping this, as a guide, they have to calculate and tabulate various vehicle performance parameters and design parameters and to draw curves using these data.

UNIT I

INTRODUCTION

9

Assumptions to be made in designing a vehicle, Range of values for Gross Vehicle Weight, Frontal Area, maximum speed, maximum acceleration, gradability in different gears, Basics of Automobile Design.

UNIT II

RESISTANCE TO VEHICLE MOTION

9

Calculation, Tabulation and Plotting of Curves for Air and Rolling Resistances at various vehicle speeds, Calculation and Plotting of Driving force, Power requirement for different loads and acceleration, Maximum Power calculation.

UNIT III

PERFORMANCE CURVES – I

9

Calculation, Tabulation and Plotting of Torque and Mechanical Efficiency for different vehicle speeds, Interpolation of Pressure – Volume diagram, Calculation of frictional Mean Effective Pressure, Calculation of Engine Cubic Capacity, Bore and Stroke Length.

UNIT IV

PERFORMANCE CURVES – II

9

Connecting rod length to Crank Radius Ratio, Plotting of Piston Velocity and Acceleration against Crank Angle, Plotting Gas force, inertia force and Resultant force against Crank Angle, Turning Moment and Side Thrust against Crank Angle.

UNIT V

GEAR RATIOS

9

Determination of Gear Ratios, Acceleration and Gradability, Typical Problems on Vehicle performance

TOTAL : 60 PERIODS

OUTCOMES:
• The students can able to understand the basic design principle of vehicle, able to draw the performance curves pertain to engine and chassis.

TEXT BOOKS:
1. Giri. N. K., "Automotive Mechanics", Khanna Publishers, New Delhi, 2005.
2. Heldt, P.M., "High Speed Combustion Engines", Oxford and I.B.H. Publishing Co., Kolkata, 2002.

REFERENCE
1. Gupta. R.B., "Automobile Engineering", Sathya Prakashan, 8 edu., 2013.