A fuel injection system is a technology used in internal combustion engines to deliver fuel directly into the engine's combustion chamber. This system replaces older carburetor designs and provides more precise control over the fuel-air mixture, improving efficiency and performance. It uses sensors to monitor engine conditions and adjusts the fuel flow accordingly. There are different types of fuel injection systems, including port fuel injection and direct fuel injection. Each type has its advantages, such as better fuel atomization and reduced emissions. Overall, a fuel injection system plays a crucial role in modern vehicles, enhancing their power and fuel economy.