Injector assembly

Tucker and Lorian finetuning an injector assembly

An injector assembly was, as far as Terran technology was concerned, a crucial component of a starship's main propulsion systems. As the name suggests, the injector assembly was presumably comprised of an array of smaller components. The injector supplies a substance (possibly deuterium) into a vessel's warp core or impulse drive reactor as a function of the matter/antimatter annihilation which generates a ships warp field and other power systems. When the crew of the Enterprise NX-01 needed to arrive to meet Degra at a prearranged time and place but were too far away to get there on time, Lorian modified the Enterprise's injector assembly to reach up to warp factor 7 but at shorter intervals. (ENT: "E²")

The Son'a injector assembly

Simulated launch of a Son'a injector assembly

Two centuries later, in 2373, an injector assembly was for the Son'a a crucial piece of equipment in order to harvest metaphasic radiation from the rings of the planet Ba'ku. That piece of equipment was to be launched from a specialty ship, the Son'a collector, right into the rings of Ba'ku where it was to be detonated by firing charges that would start a thermolytic reaction, the radiation of which to be collected by he collector. A simulation ran by Ahdar Ru'afo showed that it was a viable option. Nevertheless, launch and execution were prevented through the intervention of the USS Enterprise-E and its crew. In the process both collector and assembly were destroyed. (Star Trek: Insurrection)

The Son'a injector assembly was not named in the movie, but what it was called and what it did was specifically mentioned by name in scene 137 of the final movie script version.