Oil pressure warning sensor for pressure sensitive capacitor

Abstract

An oil pressure warning sensor for a pressure sensitive capacitor relates to a sensor, which comprises a telescoping oil tank main element, an oil tank telescoping component arranged in the telescoping oil tank main element, and a casing cooperating with the telescoping oil tank main element to close the oil tank telescoping component in the telescoping oil tank main element, wherein the telescoping oil tank main element comprises an iron-bottomed bowl and screws in sealed fit with through holes reserved at the bottom of the iron-bottomed bowl; the oil tank telescoping component comprises a sealing washer, a waveform return spring plate, a knurled spring plate, a sliding sleeve, a movable electrode plate, a return spring, a double-sided circuit board and a circuit board retaining snap ring, which are arranged in the iron-bottomed bowl in turn; a fixed electrode plate is arranged on one side, close to the movable electrode plate, of the double-sided circuit board; the movable electrodeplate and the fixed electrode plate form a capacitor with variable capacitance; upon receiving the pressure from the engine oil, the waveform return spring leaf and the knurled spring leaf deform anddrive the movable electrode plate to compress and deform the return spring so as to change the distance between the movable electrode plate and the fixed electrode plate to change the capacitance of the capacitor; and the oil pressure warning sensor for the pressure sensitive capacitor is further provided with a control circuit connected with the capacitor and used for converting the variation ofoil pressure into an electrical signal and transmitting the electric signal to an oil instrument.

Description

【Technical field】 [0001] The utility model relates to an engine oil pressure alarm sensor, which is used for detecting the engine oil pressure of various motor vehicles and has the function of alarming when the engine oil pressure is too low. 【Background technique】 [0002] Our country is a big developing country with a large number of motor vehicles. The parts of the motor vehicles need lubricating oil to lubricate and cool down. If the motor vehicles do not have lubricating oil, they cannot run normally. The lubricating oil for motor vehicles is measured according to regulations, and the measured amount is directly displayed on the oil meter through the transformation of the oil pressure alarm sensor. Therefore, the technical quality of the oil pressure alarm sensor directly affects the operation safety of the motor vehicle. The principle of the oil pressure alarm sensor currently on the market is basically one mode, which is driven by the oil pressure, and the resistance ...

AI Technical Summary

Problems solved by technology

This kind of oil pressure alarm sensor has the following disadvantages: 1. It is bulky; 2. It is difficult to control the accuracy of the mutual cooperation of the lever transmission; 3. The resistance of the wire winding changes with the temperature; The range is small, the lever is difficult to control, and the point contact alarm is easy to be oxidized after a long time

Therefore, the overall performance of this oil pressure alarm sensor is relatively poor, and the general service life is also relatively short. Especially for motor vehicles that have been running for a long time, each motor vehicle must replace at least two or more oil pressure alarm sensors every year.

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