Posted tagged ‘automobile engineering’

Jobs after M.Tech in Mechanical Engineering

October 10, 2011

Post graduation in Mechanical engineering is good mainly from academic and industry research perspective. They have reasonable opportunities, more abroad than India because of the presence of lot of manufacturing firms. Germany, Korea, Japan, and US are some of those countries where mechanical engineers, especially with specialization in automobile engineering can find good jobs. In India, jobs are relatively less fitting a post graduation in mechanical engineering. There is very little research happening in manufacturing sector in India.

 

Private Sector Jobs after M.Tech in Mechanical Engineering

Students who possess a postgraduate degree in mechanical engineering or an additional degree in management can find jobs with the managerial or administrative departments of pioneer industries in the private sector. If they choose, it is also possible for them to go for industry research. Other opportunities are:

  • Teaching in Engineering Colleges
  • Consultant in transportation, logistics and automobile engineering firms
  • IT firms like IBM and Wipro take post graduate mechanical engineers in their software division which supports automobile engineering giants like Ford and other heavy machinery manufacturing giants.
  • Automobile, piping, power sector
  • Fundamental pre-sea training or a program in nautical science to join as navigating officers or marine engineers.

Government Sector Jobs after M.Tech in Mechanical Engineering

Simultaneously, there are a lot of career opportunities that are made available for postgraduate students of Mechanical engineering. Freshers can join as Junior Engineers and there is a possibility that skilled engineers can get promoted to the positions of Assistant Engineers, Assistant Executive Engineers and Executive Engineers in public sector firms which are into multiple areas of manufacturing sector like power plants, machinery plans like HAL and so on. The top most position a mechanical engineer can attain is Superintendent Engineer. These engineers are wanted in field like

 

 

  • Automobile
  • Oil exploration and Refineries
  • Machine tools
  • Mining
  • Heavy Machineries
  • Space Exploration
  • Electronics firms, etc.

Oil manufacturing firms like HPCL offer good opportunities too. In addition to this, the technical divisions of the Defense as well as the space research organization also need mechanical engineers. On top of this, the field of agriculture also gives a big importance to mechanical engineers. Here, engineers are required to manufacture as well as design the equipments needed to enhance the yield of crops.

Job Prospects Abroad after M.Tech in Mechanical Engineering

There are quite a few job opportunities that are available for postgraduates of Mechanical Engineering. Many leading international private as well as government firms employ Mechanical Engineers for research purposes. There are top quality research centres of excellence in mechanical engineering field. Some top notch firms who take in post graduate mechanical engineers are Siemens, Ford and so on.

AUTOMOBILE ENGINES

September 10, 2011

The working of an automobile engine follows the same principle as an internal combustion engine. Air, from outside, enters the engine through the air cleaner and reaches the throttle plate.
The pedal in your car is the control for the amount of air that you would want to be taken in, and you control it by pressing on this gas pedal.
The air is then distributed through the intake manifold of the cylinders.

At some point fuel is injected into the air stream, and the mixture vaporizes and is drawn into the cylinders as they start their intake stroke.

This way, when the cylinder has reached its bottom, it has drawn in sufficient mixture. As it moves up, compressing the mixture, the spark plug ignites the mixture, and as the powerful gas formed expands, it pushes the cylinder to the bottom with the cylinder once again drawing in the mixture.

In designing automobile engines, you need to be a specialist in automobile engineering.
The consideration that is taken while designing such an engine is whether it should be a carburetor or a diesel one. carburetor engines are most commonly found in passenger cars and low capacity trucks, while trucks with a capacity over two tons are fitted with diesel engines, including dump trucks, trailer tractors and bus.

Increasingly the medium and low-capacity vehicles are being fitted with diesel engines, since the fuel consumption of these engines are 30% to 50% lower than the carburetor engines.
Diesel engines not only cost more, but maintenance is much more expensive than the other type of engine. Diesels require more metal parts per kilowatt.
The critical parts of diesel engines are made of alloy steel, and the fuel injection system is much more expensive than carburetor engines.

However, the cost of manufacturing carburetor engines has increased with the use of higher mechanical grade components, considering the thermal loads of the material used. At the same time the use of high alloys and increase in production costs have contributed to the higher price of such engines.

There is a sharp rise in using aluminum alloys in design of carburetor engines in passenger cars, and with the use of high octane petrol, the cost of operation of these cars have come down extensively. Using alloy steel in constructing the engine body and other parts of the engine, makes the car lighter and hence fuel consumption goes down substantially.

The main parts that are made of high steel alloy are the main casting of the engine, the cylinder head, water and oil pumps, oil filter housing, end covers of the generator and starter, and the intake pipes. It has been observed that by using high steel alloys, the weight of the car is reduced by 35%.

The power per liter, per unit of piston area, and the brake effective pressure are 6% to 8% lower in air-cooled engines, compared to engines having liquid cooling mechanism. This is due to the fact that in engines with liquid cooling there are great losses in cylinder charging caused by the high temperature in pipes, ducts in the head, cylinder walls and head, etc.

The size of air cooled engines are much bigger than the engines with liquid cooling having the same capacity, and this is because the cylinder axes difference is larger in air-cooled engines. Taking account of the radiator dimensions, if both engines are compared, the air-cooled engine will vary slightly with its height a little longer than or approximately the same length as the water-cooled engine. As far as the width and the height is concerned both engines are about the same.

The auxiliary units of the feed and ignition, and generator and starter systems are a bit difficult to fit on the body of the air-cooled engines, because of the presence of hoods and having a danger of over-heating.