What type of hydraulic injector is characterized by multiple orifices?

The type of hydraulic injector characterized by multiple orifices is the hole injector. This design utilizes multiple openings, or orifices, that allow fuel or fluid to be injected into the combustion chamber or a mixing area in a more distributed and often more efficient manner. The use of multiple orifices can enhance atomization and ensure a more complete mixing of fuel with air, leading to improved combustion efficiency and performance.

In contrast, pintle injectors usually feature a single pointed nozzle that opens and closes, allowing fuel to flow through a sole orifice. Single-point injectors also have only one orifice for injection, while metered injectors are typically designed to control the amount of fuel injected but do not necessarily have multiple orifices. Thus, the hole injector is specifically notable for its multiple orifice design, which distinguishes it in applications requiring enhanced fuel delivery characteristics.