What function does a distributor serve in a fuel injection system?

In a fuel injection system, the distributor plays a crucial role in managing the distribution of fuel to the engine's cylinders. It ensures that the right amount of fuel reaches each cylinder at the appropriate time during the engine's operation, facilitating efficient combustion. This precision in fuel delivery is essential for optimal engine performance, fuel efficiency, and reduced emissions.

The distribution process involves routing the fuel from the injectors or the fuel rail to the specific cylinders based on engine demand, which is influenced by various factors, including load and speed. By doing this, the distributor helps maintain balanced fuel injection across all cylinders, contributing to the overall effectiveness of the fuel injection system in the engine.

In contrast, the other functions listed do not accurately describe the role of a distributor within a fuel injection setup. Measuring the air-fuel ratio is typically handled by sensors and not by a distributor. Regulating oil flow is a different function related to lubrication and does not pertain to fuel distribution. Ignition of the fuel-air mixture is performed by the ignition system, which is separate from the fuel delivery process managed by the distributor.