The function of one of the diesel engine protection sensors, the oil pressure sensor

1. Engine Oil Pressure Sensor (Oil Pressure Probe)

Installed in the diesel engine oil passage, available in alarm switch type and analog transmission type.

- Function 1: Real-time monitoring of engine lubricating oil pressure;

When the engine is cold, the oil is viscous and the pressure is high; when the engine is hot, wear and oil deficiency cause the pressure to drop;

- Function 2: Safety protection logic:

① Startup phase: Delay for a few seconds to avoid false shutdown due to low oil pressure right after starting;

② During operation: If oil pressure drops below the safety threshold (generally ≤ 0.2 MPa), the controller triggers a low oil pressure alarm and shuts down the engine;

- Signal Transmission:

Switch type: On/off signal sent to the control panel;

Transmitter type: Outputs 0-5V/4-20mA, real-time display of oil pressure on the screen;

Fault Hazards: Insufficient engine oil/oil pump failure, without protection it can cause cylinder scoring, bearing seizure, or complete engine failure.