2. The emission of electrons from one solid into another solid.
3. The process of injecting a beam of electrons with an electron gun into the vacuum chamber of a mass spectrometer, betatron, or other large electron accelerator.
4. The procedure used in forcing a beam of electrons into any large electron accelerator; such as, a beatatron by using an electron gun.
2. A system which injects fuel into an engine and includes an electronic control unit to time and meter or measure the flow.
Fuel is delivered in intermittent pulses by the opening and closing of solenoid-controlled injectors.
Another reason for using a lethal injection is to complete a process of execution for capital punishment when someone has been sentenced by a court of law with a death penalty.
On May 15, 2015; a U.S. jury Sentenced Boston bomber Dzhokhar Tsarnaev to death by lethal injection.
Three people were killed and 260 were injured when Tsarnaev and his brother placed bombs at the finishing line of the Boston Marathon in 2013.
The convicted Boston bomber is likely to be moved to a federal prison in Terre Haute, Indiana, to await execution.
Massachusetts ended the death penalty in 1984, but Tsarnaev was tried on federal charges and so it is possible that he will be legally executed.
The fuel injectors are valves that, at the appropriate times, open to allow fuel to be sprayed or atomized into a throttle bore or into the intake manifold ports.
The fuel injectors are usually solenoid operated valves under the control of the vehicle's on-board computer resulting in "electronic fuel injection".
The fuel efficiency of fuel injection systems is less temperature-dependent than carburetor systems. Diesel engines always use injectors.