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oil pressure sensor in car
The wiring mode of the electronic oil pressure sensor is completely consistent with that of the traditional mechanical sensor. It can replace the mechanical pressure sensor and connect directly with the automobile oil pressure indicator and the low-pressure alarm lamp to indicate the oil pressure of the diesel automobile engine and provide the low-pressure alarm signal. Compared with the traditional piezoresistive oil pressure sensor, the electronic automotive oil pressure sensor has the advantages of no mechanical moving parts (i.e. no contact), high precision, high reliability, long service life and so on, and meets the requirements of the development of automotive electronics.
Due to the harsh working environment of the automobile, the requirements for the sensor are very strict. In the design of the electronic automobile oil force sensor, it is not only necessary to select the pressure measuring device with high temperature resistance, corrosion resistance and high precision, and select the elements with reliable performance and wide operating temperature range, but also need to take anti-interference measures in the circuit to improve the reliability of the sensor.
Reliability of work
The process of oil pressure detection needs to be carried out during the operation of the engine. The temperature of its working conditions changes obviously. At the same time, the road conditions will also affect the detection during the driving of the vehicle. The engine bears huge heat load, impact, vibration, etc., so the working condition of the sensor is also negatively affected by the harsh environment such as high temperature, humidity, impact, vibration, corrosion, oil pollution, etc. Therefore, reliability is the first consideration in product design. Reliability design and product reliability analysis run through the whole development process. When meeting the reliability, the most important thing is the selection and combination of product components. The space left by the engine for the sensor is very limited, so the sensor should use patch type components as much as possible. For example, the common operating temperature of electrolytic capacitor is -20 ℃ ~ 70 ℃, so the long-term high temperature will deteriorate its quality and reduce its reliability. Therefore, the use of high-temperature capacitor is an important reliability guarantee measure.
Compatibility guarantee
Automobile is a complex system, in which electronic information system has become an indispensable control system. The application demand of electronic sensor is actually developed under the demand of electronic control. Therefore, the compatibility of other control circuits has become an important basis to improve its use effect. At the same time, the electronic sensor is also an active device, which must be supported by a power supply. So how to integrate it into the whole electronic circuit is also a key issue to be considered. Therefore, the development and improvement direction of electronic oil pressure sensor also includes the improvement of its compatibility.
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