What role does the fuel rail play in a fuel injection system?

The fuel rail is a crucial component in a fuel injection system, serving the essential function of distributing fuel to the injectors at a consistent pressure. In modern fuel injection systems, the fuel rail is typically connected directly to the fuel pump and receives pressurized fuel. It ensures that each injector receives an adequate and uniform supply of fuel, which is vital for optimal engine performance and efficiency.

Maintaining consistent pressure in the fuel delivery system is critical because variations can lead to improper fuel-air mixture and ultimately affect engine performance, such as idling, acceleration, and emissions. The fuel rail typically holds a small volume of fuel, ready to be injected into the combustion chamber, thus its design is integral to the overall functioning of the fuel injection system.