MMAE-201 Vehicle Dynamics
Unit I
BASIC OF VIBRATION :Classification of vibration, definitions, mechanical vibrating systems, mechanical vibration and human comfort. Modeling and simulation studies. Single degree of freedom, free, forced and damped vibrations. Magnification factor and transmissibility. Vibration absorber. Vibration measuring instruments. Two degree of freedom system. modal analysis.
Unit II
TYRES:Tire forces and moments, rolling resistance of tires, relationship between tractive effort and longitudinal slip of tyres, cornering properties of tyres, ride properties of tyre.
Unit III
PERFORMANCE CHARACTERISTICS OF VEHICLE:Equation of motion and maximum tractive effort. Aerodynamics forces and moments. Power plant and transmission characteristics. Prediction of vehicle performance. Braking performance.
Unit IV
HANDLING CHARACTERISTICS OF VEHICLES:Steering geometry. Steady state handling characteristics. Steady state response to steering input. Transient response characteristics. Directional stability of vehicle.
Unit V
DYNAMICS OF SUSPENSION SYSTEM:Requirements of suspension system. Spring mass frequency, wheel hop, Wheel wobble, wheel shimmy, choice of suspension spring rate. Calculation of effective spring rate. Vehicle suspension in fore and aft, Hydraulic dampers and choice of damping characteristics. Compensated suspension systems. Human response to vibration, vehicle ride model. Load distribution. Stability on a curved track, banked road and on a slope.
MMAE-202 Automotive Electrical and Electronics Control
Unit I
BATTERIES AND STARTING SYSTEM :Different types of Batteries – Principle, Construction and Electrochemical action of Lead – Acid battery, Electrolyte, Efficiency, Rating, Charging, Testing and Maintenance. Starting System, Starter Motors – Characteristics, Capacity requirements. Drive Mechanisms. Starter Switches.
Unit II
CHARGING SYSTEM, LIGHTING SYSTEM AND ACCESSORIES :D.C. Generators and Alternators their Characteristics. Control cutout, Electrical, Electro-mechanical and electronic regulators. Regulations for charging. Wiring Requirements, Insulated and earth return system, details of head light and side light, LED lighting system, head light dazzling and preventive methods. Lighting design, Dash board instruments, Horns, wiper, Trafficators, Warning system and safety devices.
Unit III
ELECTRONIC IGNITION AND INJECTION SYSTEMS :Spark plugs, Advance mechanisms. Different types of electronic ignition systems - variable ignition timing, distributor less ignition. Spark timing control. Electronic fuel injection systems. Engine mapping.
Unit IV
SENSORS IN AUTOMOBILES: Basic sensor arrangement. Types of sensors – Oxygen sensor, fuel metering/Vehicle speed sensor, mass air flow sensor, temperature sensor, altitude sensor, pressure sensor and detonation sensor. Various actuators and its application in automobiles.
Unit V
MICROPROCESSOR IN AUTOMOBILES :Microprocessor And Microcomputer controlled devices in automobiles such as instrument cluster, Voice warning system, Travel information system, Keyless entry system, Automatic Transmission. Environmental requirements (vibration, Temperature and EMI).
MMAE-203 Vehicle Safety & Maintenance
UNIT I
SAFETY CONCEPTS:Design of the body for safety, engine location, deceleration of vehicle inside passenger compartment, deceleration on impact with stationary and movable obstacle, concept of crumble zone, safety sandwich construction. Active safety: driving safety, conditional safety, perceptibility safety, operating safety- passive safety: exterior safety, interior safety, deformation behaviour of vehicle body, speed and acceleration characteristics of passenger compartment on impact.
UNIT II
SAFETY EQUIPMENTS:Seat belt, regulations, automatic seat belt tightener system, collapsible steering column, tiltable steering wheel, air bags, electronic system for activating air bags, bumper design for safety, antiskid braking system, regenrative braking system, speed control devices.
UNIT III
COLLISION WARNING, COMFORT AND CONVENIENCE SYSTEM:Collision warning system, causes of rear end collision, frontal object detection, rear vehicle object detection system, object detection system with braking system interactions, driver fitness detection. Steering and mirror adjustment, central locking system , Garage door opening system, tyre pressure control system, rain sensor system, environment information system, manual and automated wiper system, satellite control of vehicle operation for safe and fast travel.
UNIT IV
MAINTENANCE TOOL, SHOP, SCHEDULE, RECORDS:Standard tool set, torque wrenches, compression and vacuum gauges, engine analyzer and scanner, computerized wheel alignment and balancing, gauges for engine tune up and pollution measurement, spark plug cleaner, cylinder re boring machine, fuel injection calibration machine. Importance of maintenance. Schedule and unscheduled maintenance. Scope of maintenance. Equipment downtime. Vehicle inspection. Reports. Log books. Trip sheet. Lay out and requirements of maintenance shop.
UNIT V
POWER PLANT REPAIR AND OVERHAULING:Dismantling of power plant and its components. Cleaning methods. Inspection and checking. Repair and reconditioning methods for all engine components. Maintenance of ignition system, fuel injection system, cooling system,- lubrication system. Power plant trouble shooting chart, Maintenance, servicing and repair of clutch, fluid coupling, gearbox, torque converter, propeller shaft. Maintenance of front axle, rear axle, brakes, steering systems. Tyre maintenance.
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MMAE-204 Automotive Simulation & Testing
UNIT I:
INTRODUCTION TO MODELING AND SIMULATION : Modeling and simulation methodology, system modeling, concept of simulation; gaming; static, continuous and discrete event simulation; 3D modeling and dynamic simulation.
UNIT II:
VERIFICATION AND VALIDATION : Design of simulation experiments, preparation of causal loop diagrams and flow diagrams, validation of experimental models, testing and analysis. Simulation languages comparison and selection, study of simulation software
UNIT III
SI ENGINE SIMULATION WITH ADIABATIC COMBUSTION Introduction, Engine details, temperature drop due to fuel vaporization, full throttle operation, work output and efficiency calculation, part-throttle operation, engine performance at part throttle, super charged operation, SI Engines simulation with progressive combustion
UNIT IV
SI ENGINE SIMULATION WITH GAS EXCHANGE PROCESS Introduction, gas exchange process, Heat transfer process, friction calculation, compression of simulated values, validation of the computer code, engine performance simulation, pressure crank angle diagram, brake power, brake thermal efficiency, effect of speed on performance, simulation of two stroke SI Engine.
UNIT V
SI & CI Engine Testing Morse Test, Motoring Test, Retardation Test, Willan’s Line Method, Engine Indicators, Brake Power Testing, Fuel Consumption Measurement, Air Consumption Measurements, Emission Testing, Flame Temperature Measurement, Performance Parameters and Characteristics of Engines
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MMAE-205 Automobile Design
UNIT I
Engineering Design, Steps in Design, Design Process, Properties of Engineering Materials, Standardization & Interchangeability of Machine Elements, Design of major engine components.
UNIT II
Design procedure of theoretical analysis, design considerations, material selection & actual design of components – cylinder block design, cylinder head design &piston pin design, piston ring design, connecting rod design, crank shaft design, flywheel design, design of valve mechanism.
UNIT III
Engine balancing, firing order, longitudinal forces, transverse forces, pitching moments, yawing moments, Engine layout, major critical speed & minor critical speed, design of engine mounting, design of cooling system, design principals of exhaust & inlet systems.
UNIT IV
Determination of engine power. Engine selection, swept volume, stroke, bore& no. of cylinders, arrangement of cylinder stroke to bore ratio, Primary design calculation of major dimensions of fuel injection system.
UNIT V
Basic concepts of CAD: Introduction, Graphics Standards, Two Dimesional transformation, Three Dimesional transformation Three Dimensional Geometric Transformation, Multiple Transformations, Rotation about an arbitrary axis in space, Matrix equations for Orthographic Projection.
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MMAE- 206 Lab III Design Practice
PRACTICAL /LAB WORK
Design of automobile components:
1 Chassis
2 Frame
3 Axle
4 Suspension
5 Cylinder
6 Piston
7 Connecting rod.
8 Valves
9 Crank shaft
10 Cam shaft
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LIST OF EXPERIMENTS:
1. Timer
2. Seven segment displays
3. Characteristics of load cells
4. Characteristics of thermocouples
5. Characteristics of resistance thermometers
6. Characteristics of piezoelectric pressure transducers
7. Characteristics of LVDT
8. Characteristics of Strain gauges
9. Programming of microprocessor.
10. Programming of microcontroller.
11. Interfacing of microprocessors,
12. Interfacing of micro controllers.
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