EMU refers to a kind of train that travels on rails, with its own power plant and carriage, which can provide the function of carrying and power drive. EMU trains usually have high running speed and large passenger carrying capacity, which is an important part of modern railway transportation.
EMUs can be divided into two types: single locomotive and power car. A single locomotive only has a traction function, which is responsible for connecting the carriages together and providing traction, while a power car not only has a traction function, but also can carry passengers and provide transportation services. Power cars are usually equipped with a power unit, such as an electric locomotive or diesel locomotive, which can generate enough power to propel the train forward.
A bullet train is a high-speed train that resembles a bullet in shape, also known as a high-speed EMU. This type of train has a streamlined design designed to reduce air resistance and increase the efficiency and speed of the train. Bullet trains are usually electrically driven, using electric locomotives or electric multiple units, and are able to travel at higher speeds, with a maximum speed of several hundred kilometers per hour or even more.
In China, bullet trains, also known as high-speed rail trains, are an important part of China's railway system. China's high-speed rail network is growing rapidly and has the largest and most advanced high-speed rail network in the world. China's high-speed rail trains use a range of EMU models, such as CRH1, CRH2, CRH3 and CRH5. These EMUs have high running speed and comfortable riding experience, and have become the preferred means of transportation for people.
In general, an EMU is a train that runs on a track and has its own power plant and carriage that can provide the function of carrying and power drive. Bullet trains are a special type of high-speed EMUs that have a streamlined design and travel at higher speeds. China's high-speed rail network is developing rapidly, becoming the most advanced and largest in the world, and EMUs play an important role in it.