What is the Principle of the Oil Pressure Sensor?

[Clyde]

The principle of the oil pressure sensor is: When the engine is running, the pressure measurement device detects the oil pressure and converts the pressure signal into an electrical signal, which is then sent to the signal processing circuit. After voltage and current amplification, the amplified pressure signal is transmitted via the signal line to the oil pressure gauge. This changes the current ratio passing through the two coils inside the oil pressure gauge, thereby indicating the engine's oil pressure. Here are some related details: 1. The electronic oil pressure sensor consists of a thick-film pressure sensor chip, signal processing circuit, housing, fixed circuit board device, and two leads (signal line and alarm line). The signal processing circuit includes a power supply circuit, sensor compensation circuit, zero-adjustment circuit, voltage amplification circuit, current amplification circuit, filtering circuit, and alarm circuit. 2. The wiring method of the electronic oil pressure sensor is completely consistent with that of traditional mechanical sensors. It can replace mechanical pressure sensors and directly connect to the vehicle's oil pressure gauge and low-pressure warning light, indicating the oil pressure of the diesel engine and providing a low-pressure alarm signal.