What is the primary purpose of a fuel accumulator in a fuel metering system?

The primary purpose of a fuel accumulator in a fuel metering system is to store fuel under pressure for a steady supply. This function is crucial because it helps maintain consistent fuel pressure, which is necessary for optimal fuel injection and engine performance. By storing fuel in this manner, the accumulator ensures that an adequate supply is available during varying engine demands, particularly during rapid acceleration or high-load conditions.

In fuel metering systems, maintaining a steady and reliable flow of fuel contributes to improved combustion efficiency and reduced emissions. The accumulator acts as a buffer to absorb fluctuations in fuel demand, allowing the fuel metering system to operate smoothly and efficiently. This role is vital in preventing fuel starvation, which can lead to performance issues or engine damage.

Other choices, while concerning aspects of fuel management, do not capture the primary function of the accumulator. For instance, the cooling of fuel is managed through different components, while separating liquid fuel from vapors pertains more to the fuel management process than the accumulator's role. Filtering impurities is also handled by dedicated fuel filters, which are separate from the accumulator's purpose.