Automobiles (pronounced auto- + mobile) are self-propelled vehicles that have four wheels and an internal combustion engine. They are used for passenger transportation, and can be fueled most commonly with gasoline, a liquid petroleum product.

Automobile engineering is a branch of mechanical engineering that focuses on the design, construction, and manufacture of automobiles. It also consists of research and development in automotive technology, including manufacturing processes and vehicle safety.

An automobile consists of several parts, most notably an engine, gears, and a transmission. The engine is a crucial component of the automobile because it provides power to propel the vehicle. It has a number of different parts, including the piston, the connecting rods, the crankshaft, and the flywheel.

The transmission combines the power of the engine with the speed of the vehicle, using a variety of gears to transfer torque and speed from the engine to the wheels. It also uses a fluid coupling, which is similar to a clutch but works with a liquid, rather than a spring.

Another important part of the automobile is the brakes. Braking systems are designed to prevent the wheels from slipping and spinning when the car is stopped or turning sharply.

A car can be an extremely useful tool to people who have busy lives and don’t have enough time to travel by other means. It can save you a lot of time on your daily commute, shopping trips, or visiting friends and family.