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oil pressure gauge sensor
Definition of oil pressure gauge sensor: the oil pressure sensor of automobile detects the oil pressure of vehicle engine.
The detected data can help control the normal operation of the engine.
Classification: the oil pressure sensor is of two types: shunu, jinhumu and variable resistance.
Bimetallic plate composition: diaphragm, spring plate, bimetallic plate, adjusting gear and contact plate, sensor terminal, oil pressure gauge sensor terminal, pointer, etc.
Working principle of oil pressure gauge sensor: when the ignition switch is on, the current flows through the heating wire of bimetal 4 roll, bimetallic sheet 4 is deformed by heating to separate the contacts; Then bimetallic the sheet 4 is cooled and straightened again, and the contact is closed again. So repeatedly, in the circuit form a pulse current.Engine oil pressure sensor is that there is a sliding resistance in the oil pressure sensor. Use the oil pressure to push the potentiometer of the sliding resistance to move, change the current of the oil pressure gauge and change the position of the pointer. The amplified pressure signal is connected to the oil pressure indicator through the signal line, and the ratio of the current passing through the two coils in the oil pressure indicator is changed to indicate the engine oil pressure.
Sliding resistance oil pressure sensor
The engine oil pressure sensor is used to detect the engine oil pressure. It is usually screwed into the oil passage of the cylinder block through screws.Its working principle is shown in the figure below. There is a variable resistor inside the oil pressure sensor. One end outputs a signal and the other end is connected with the grounded sliding arm. When the oil pressure increases, the oil pressure pushes the diaphragm to bend through the lubricating oil passage interface, and the diaphragm pushes the sliding arm to the low resistance position, so as to increase the output current in the circuit; On the contrary, the diaphragm pushes the sliding arm to the high resistance position to reduce the output current in the circuit, and finally indicates the oil pressure with a pointer on the oil pressure gauge.
structure of electronic oil pressure gauge sensor
The electronic oil pressure sensor is composed of thick film pressure sensor chip, signal processing circuit, shell, fixed circuit board device and two leads (signal line and alarm line).The signal processing circuit is composed of power supply circuit, sensor compensation circuit, zero adjustment circuit, voltage amplification circuit, current amplification circuit, filter circuit and alarm circuit.
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