What is the working principle of an automobile engine oil pressure sensor?
1 Answers
Automobile engine oil pressure sensor working principle is that there is a sliding resistor inside the oil pressure sensor, which uses the oil pressure to push the potentiometer of the sliding resistor to move, changing the current of the oil pressure gauge and the position of the pointer. The amplified pressure signal is transmitted through the signal line to the oil pressure indicator, altering the current ratio passing through the two coils inside the oil pressure indicator, thereby indicating the engine's oil pressure. The oil pressure sensor consists of a thick-film pressure sensor chip, signal processing circuit, housing, fixed circuit board device, and two leads. The signal processing circuit is composed of a power supply circuit, sensor compensation circuit, zero adjustment circuit, voltage amplification circuit, current amplification circuit, filtering circuit, and alarm circuit.