Automobiles are a class of motorized vehicles that travel on roads and carry passengers. They typically have four wheels and an internal combustion engine, and they are powered by the chemical energy of fuel. An automobile can also be powered by alternative energy like an electric battery or fuel cell.
The car is an essential part of modern life, providing mobility for individuals and businesses. It can be a convenient way to get to work, avoid traffic congestion and visit destinations that are not accessible by public transportation. However, the automobile is also responsible for a significant share of air pollution and global warming. In addition to these concerns, there are some safety issues that must be addressed.
When shopping for a new car, it’s easy to feel overwhelmed by the vast amount of choices. From minivans to luxury sedans, the selection is nearly endless. And even as some formats fade (like the convertible or big sedan), more are being added to the market, including hybrids and electric cars.
Most automobiles burn a type of fuel to power an internal combustion engine called a motor. The motor sends energy to the vehicle’s wheels through a transmission, which has gears that can change the ratio between engine speed and wheel speed. The engine can use different types of fuel such as gasoline, diesel and kerosene. Depending on the type of fuel used, an automobile can have a front-engine, mid-engine or rear-engine layout.