30-05-2012, 10:48 AM
MODERN CARS & PARTS
MODERN CARS & PARTS.ppt (Size: 1.67 MB / Downloads: 223)
INTRODUCTION
Motor car,any self propelled vehicle with more than to wheels and a passenger,compartments capable of being steered by the operator for use on roads .the term is used more specifically to denote any such vehicle designed to carry a minimum of seven people.
PARTS OF THE CARS
Any type of machine that obtains mechanicals energy directly from the expenditure of the chemical energy of full burned in a combustion chamber that is and integral part of the engine.
Mechanical device applied to the surface of a rotating shaft, wheel, or disc in such a way as to retard motion by means of friction. The break is usually lined with a heat resistance material that will not readily wear away or become smooth and slippery.
CYLINDER HEAD
The engines cylinder block is invariably made of cast iron on to which is bolted on aluminium cylinder head .This contains the valves that permit the petrol-air mixture to enter the combustion chamber and the exhaust gases to leave it .
FUEL INJECTION
A carburttor had been used from the earlist days of motoring as a component in which the petrol-air mixture was reated. The limitation of such an arrangement was that the mixture was unevenly distributed which resulted in incomplete combustion and undesirable amount of unburnt fuel reaching the atmosphere.
HOW CAR ENGINE WORK
FOUR STROKE CYCLE
The over whelming majority of car engines still employ the four stroke cycle, invented by Nicholas Otto in
1876.
The first down stroke of the piston that is attached to a connecting rod at its top end and to the crank shaft at
the bottom, draws a petrol-air mixture into the cylinder.
This is then compressed, which is the second stage of the process.
CONCLUSION
In this case we can discuss about the various parts like the engine , car breaks,gear e.t.c and all the other types of cars.
We get these information's from ENCARTA ENCYCLOPEDIA and INTERNET.