Which device is designed to shut down the engine in the event of low oil pressure?

The device specifically designed to shut down the engine when low oil pressure is detected is the oil pressure switch. This switch monitors the oil pressure within the engine's lubrication system. If the pressure drops below a certain threshold, indicating potential insufficient lubrication and the risk of engine damage, the switch activates and sends a signal to the engine control system to shut down the engine.

This automatic shutdown feature is critical for protecting the engine from severe damage that could occur due to lack of oil flow, which could lead to overheating and catastrophic failure. In contrast, the other devices mentioned serve different functions: the oil pump circulates oil to ensure proper lubrication, the oil filter removes contaminants from the oil, and the pressure regulator maintains a stable pressure within the system, but none of them are responsible for shutting down the engine.