This electric enclosure has no moving parts to be affected by vibrations.
The NASCAR Sprint Cup championship moved to electronic fuel injection for the control of their engines in February 2012. Part of the mandated electrical system included a relay control box to switch a 12v power supply to the various sensors, actuators and fuel pumps. The relay box contains electro-mechanical devices (relays) and two circuit breakers.
3. Fuel pump relay 22. Power relay
The solenoid valve (4) is under the control of the ECM, as is the relay (2) that provides the electrical power for the air pump (3).