What is the characteristic of metered fuel pressure in an injection-type carburetor?

The correct answer highlights that in an injection-type carburetor, the metered fuel pressure remains relatively constant throughout the engine's operating range. This characteristic is essential for ensuring that the fuel delivery to the engine remains consistent, allowing for optimal combustion and performance.

A constant fuel pressure is crucial because it helps maintain a stable air-fuel ratio as engine loads and speeds change. The design of an injection-type carburetor includes mechanisms that regulate fuel pressure to prevent fluctuations that could lead to inefficient engine operation or difficulty in starting the engine. Therefore, a stable pressure allows for better control of the fuel being injected into the combustion chamber, which is necessary for the precise functioning of modern engines.

This characteristic stands in contrast to scenarios where fuel pressure may decrease with increased engine speed, fluctuate significantly, or only be stable at idle, which can lead to performance issues and reduced efficiency.