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Automobile ENginerring.pptx

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Automobile ENginerring.pptx

  1. 1. Main Parts of an Automobiles In this articles we will learn about the components and parts of an automobile
  2. 2. Components, Parts of Automobile  An automobile has several numbers of parts. But there are four essential components of automobile. These are:  1. The Chassis.  2. The Engine.  3. The Transmission System.  4. The Body.  Apart from these four essential parts of automobile, there are controls and auxiliaries.
  3. 3. 1. The Chassis.  The chassis of an automobile incorporates all the major assemblies consisting of an engine, components of transmission system such as clutch, gearbox, propeller shaft, axles, a control system such as brakes and steering, and suspension system of the vehicle.  In other words, it is the vehicle without its body
  4. 4. chassis
  5. 5. 2. The Engine.  The engine is the source of motive power to an automobile. Obviously, it is a very important part of the automobile because in the absence of an engine, the automobile may not move at all, and its basic function of transporting passengers or goods would be defeated.  The power of the engine determines the working of the automobile. In the same manner, the efficiency of the engine determines the efficiency of an automobile.
  6. 6. 3. The Transmission System  The transmission system transmits power developed by the engine to the road wheels .The power available as output from the engine is in the form of rotation of the crankshaft.  This movement is to be transferred to the road wheels to cause their rotary motion. Their rotary motion makes possible the movement of the vehicle.  The transmission system consists of different parts.  clutch,  gearbox,  propeller shaft,  differential and  axle,
  7. 7. Transmission system
  8. 8.  i. Clutch.  The clutch, part of the transmission system is next to the crankshaft. It is a mechanism enabling the rotary motion of one shaft transmitted to the second shaft ‘at will.’  When the engine starts, it should not be connected to road wheels, i.e., these should not start moving as soon as the engine starts.  ii. Gearbox.  The gearbox is the component of the transmission system next to the clutch. It has got a gear train, and it provides different gear ratios. These ratios determine the rotary speed of output shaft from the gearbox.  Iii.Axle.  The axle is the next component of the transmission system. The axle receiving power from the engine is termed as ‘live’ axle. It is in two halves.  The ends of the axle have road wheels connected to it. These road wheels are in direct contact with the road surface. The body of the automobile is above the axle.
  9. 9. iV. Differential.  when the automobile is moving on a curved path. On a curved path, the outer wheels are required to traverse a circle of a bigger radius than the inner wheels.  This means that the outer wheels are required to traverse larger distance as compared to inner wheels. As the automobile is to move as a single unit, all the four wheels must travel together.  Therefore, the outer wheels should travel larger distance and inner wheels should travel smaller distance in the same time period.  Hence, the variation in the speed of inner and outer wheels is needed. This is performed by the differential with the help of sun and planet gear system.
  10. 10. 4. The Body.  The use of a separate frame to which the body structure is attached is now almost obsolete except for some applications for heavy-duty commercial vehicles.  Many heavy vehicles now use ‘sub-frames’ of simple construction to which the engine and gearbox are attached.  The sub-frame is supported on the mainframe and is fixed on it through some suitable rubber connections to isolate the engine vibrations.
  11. 11. 5.Control System and Auxillaries  Control system.  The control systems are used to control the motion of an automobile and therefore are essential in an automobile. These include;  i. The steering system, and  ii. Braking system or brakes.  The Auxiliaries.  These are the components of an automobile which may not be essential, but it can make the driving more comfortable.  Examples: indicators, air-conditioners etc.
  12. 12. Thank You

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