Automobile Engineering Notes

Automobile Engineering Notes

 

Introduction:

Basic structure, general layout and type of automotive vehicles, Frameless and unitary construction; position of power unit.

Power Unit :

Power requirements – motion resistance and power loss, tractive effort and vehicle performance curves; selection of power unit and engine performance characteristics; pollution due to vehicle emission and exhaust emission control system

Fuel Supply System :

Air cleaner and fuel pumps; Air fuel requirements and carburation; Modifications in a simple carburettor to meet different starting, running, idling and accelerating consitions; constructional details of carburetors and fuel injection systems used in Indian make vehicles. Diesel fuel system – cleaning, injection pump, injector and nozzles

Lubrication & Cooling System :

Necessity of lubrication; Desirable properties of lubricants; various types of lubricants and oil additives; different systems of lubrication – oil filters, oil pumps and oil pressure indicator; crank case ventilation and dilution.

Purpose of cooling, air and water cooling systems; radiator, thermostat, pump and fan

Chases and suspension :

Loads on the frame, considerations of strength and stiffness, engine mounting, conventional and independent suspension systems; shock absorbs and stablizers; wheels and tyres

Transmission System :

Basic requirements and standard transmission systems; constructional features of automobile clutch, gear box, differential, front and rear axles; overdrives, propeller shaft, universal joint and torque tube drive; Rear wheel vs front wheel drive, principle of automatic transmission

Steering System :

Requirement and steering geometry; castor action, camber and king pin angle, toe-in of front wheels, steering linkages and steering gears; wheel alignment; power steering

Braking System :

General braking requirements; Mechanical, hydraulic, vacuum power and servo brakes; Weight transfer during braking and stopping distances

Electric System :

Conventional (coil and magneto) and transistorized ignition systems; Charging, capacity ratings and battery testing; starter motor and drive arrangements : voltage and current regulation

Maintenance :

Preventive maintenance, trouble shooting and rectification in different systems; engine turning and servicing

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