Location of Golf 1.4t Oil Pressure Sensing Plug

Usually behind the engine, on the cylinder block, near the oil filter seat. There is a wire plug on it, which is located in the oil channel in front of the oil filter element.

The electronic oil pressure sensor consists of a thick film pressure sensor chip, a signal processing circuit, a shell, a fixed circuit board device and two wires. The signal processing circuit consists of power supply circuit, sensor compensation circuit, zero adjustment circuit, voltage amplifier circuit, current amplifier circuit, filter circuit and alarm circuit.

Fig. 1 is the structural diagram of the sensor, and fig. 2 is its principle block diagram. Thick-film pressure sensor is a new strain-type pressure sensor which appeared in 1980s. It is developed by using the piezoresistive effect of thick film resistor printed and sintered on ceramic elastomer. Four thick film resistors are directly printed and sintered on the ceramic elastic diaphragm, and connected by conduction bands to form a Whiston bridge.

When the measured liquid level pressure acts on the ceramic elastomer, the elastic diaphragm deflects, and the thick film resistors printed on the elastic diaphragm also produce the same strain, in which two thick film resistors are compressed and the resistance values are reduced; The other two are under tensile strain, and the resistance increases. In this way, the measured pressure value is converted into the bridge output signal, and the signal size is proportional to the pressure.