Automobiles are four-wheeled motor vehicles designed for passenger transportation that are typically propelled by an internal combustion engine using a volatile fuel. Modern automobiles are complex technical systems employing a variety of subsystems with specific design functions. They are made of many parts, some developed through breakthroughs in existing technology while others have been adapted from other technologies such as electronic computers, high-strength plastics and new alloys of steel and nonferrous metals. Research and development engineers and scientists are constantly working on ways to make cars safer, more comfortable and environmentally friendly.
During the 19th century, German engineer Karl Benz invented the first automobile. His invention revolutionized society because it allowed people to travel far and fast without having to rely on other people or public transportation. The automobile became a part of everyday life and ushered in a period of unprecedented growth in the industrialized world. It brought jobs, places to live and services that were not available before. It also caused harm to the environment through air pollution and the destruction of undeveloped land to build highways.
The automobile is a vehicle that runs on roads and is designed to carry one to eight passengers. It has a body that is often made from steel, but can also be made from fiberglass, strong plastic or composite materials. Most automobiles have a trunk that stores the spare tire and tools. The front of the car has a windshield and grill that protects the driver and passengers from the elements.
There are several different types of automobiles, including coupes, sedans, minivans and trucks. Each type has its own unique features. For example, the sedan is a two-door automobile that usually seats two passengers. The minivan is a large automobile that can hold up to seven passengers. Trucks are usually used for hauling heavy loads and are able to climb over rough terrain.
After World War II, car manufacturers began adding new features to their automobiles. Power steering and brakes were some of the first features that were added to automobiles. In the 1960s and 1970s more and more big cars were produced. These cars consumed a lot of gasoline, which was relatively cheap at that time. As the price of oil increased, manufacturers started producing smaller cars that consumed less gas.
Today, most people own automobiles. They can use them to go shopping, run errands and visit friends and family. They can also drive to work or school. Owning a car can help someone get a better job and can help people buy homes. Car ownership requires maintenance and can be expensive, but it can save a lot of time. Cars can also be dangerous if they are driven carelessly. It is important to wear a seat belt at all times when driving.
Engineers are always developing new ways to make cars faster and more comfortable. They are also trying to find alternative energy sources for automobiles. They are exploring ways to use hydrogen fuel cells, electric cars and biodiesel. Some experts believe that future automobiles may be computerized and will be able to drive themselves.