Automobiles are self-propelled vehicles that transport passengers or goods. They can be powered by fuels such as petrol, diesel, cng, or electricity.

The modern automobile is a complex system that comprises thousands of individual parts, each designed for a specific function. The major subsystems include body, chassis, engine, drivetrain, control systems, and emission control systems.


The car’s body, which is fabricated from steel or aluminum and usually welded together, forms the passenger compartment, offers storage space, and houses the automobile’s systems. It also serves as a structural support for the car. It is important for the safety of the driver and passengers, as it prevents the car from tipping over during an accident and protects the occupants in case of an engine fire.


The chassis consists of the frame, the body, and the suspension system. The front and rear suspension systems keep the vehicle stable during sudden changes in road conditions. The chassis is also used to carry the wheels, which in turn provide the power for the automobile’s engine and drivetrain.


The transmission in an automobile is a device that transfers the input (power from the engine) to the output of the engine, which then drives the wheels. The transmission is made up of a set of forward and reverse gears, each having a different ratio of input to output. The higher the ratio, the more torque the transmission produces in the output.

The automobile has been an enormously influential invention, affecting every aspect of society. It has revolutionized transportation, the economy, and the environment.