Automobile engineering is a branch of engineering which deals with everything about automobiles and practices to propel them. 

An automobile is a vehicle driven by an internal combustion engine and it is used for transportation of passengers and goods on the ground. An automobile can also be defined as a vehicle which can move by itself. 

Examples: Car, jeep, bus, truck, scooter, etc.

Automobiles or vehicles can be classified on different bases as given below : 
On the Basis of Load 

(a) Heavy transport vehicle (HTV) or heavy motor vehicle (HMV), e.g. trucks, buses, etc. 

(b) Light transport vehicle (LTV), e.g. pickup, station wagon, etc. 

(c) Light motor vehicle (LMV), e.g. cars, jeeps, etc


(a) Two-wheeler vehicle, for example, Scooter, motorcycle, scooter, etc. 

(b) Three-wheeler vehicle, for example, Autorickshaw, three-wheeler scooter for handicaps and tempo, etc.

(c) Four wheeler vehicle, for example, Car, jeep, trucks, buses, etc. 

(d) Six wheeler vehicle, for example, Big trucks with two gear axles each having four wheels.

Fuel Used 

(a) Petrol vehicle, e.g. motorcycle, scooter, cars, etc. 

(b) Diesel vehicle, e.g. trucks, buses, etc. 

(c) Electric vehicle which use the battery to drive. 

(d) Steam vehicle, e.g. an engine which uses steam engine. These engines are now obsolete. 

(e) Gas vehicle, e.g. LPG and CNG vehicles, where LPG is liquefied petroleum gas and CNG is compressed natural gas.


On the basis of body, the vehicles are classified as : 

(a) Sedan with two doors 

(b) Sedan with four doors 

(c) Station wagon 

(d) Convertible, e.g. jeep, etc. 

(e) Van  

(f) Special purpose vehicle, e.g. ambulance, milk van, etc. 


(a) Conventional vehicles with manual transmission, e.g. car with 5 gears. 

(b) Semi-automatic 

(c) Automatic: In an automatic transmission, gears are not required to be changed manually. It automatically changes as per the speed of the automobile. 

Position of Engine 

Engine in Front 

Most of the vehicles have the engine in the front. Example: most of the cars, buses, trucks in India. 

Engine in the Rear Side 

Very few vehicles have the engine located in the rear. Example: Nano car.

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