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what is the oil pressure gauge
Oil pressure gauge, commonly known as oil gauge, indicates the lubricating oil pressure of the main oil passage of the lubricating system when the engine is running.
Composition of oil pressure gauge
When the engine is working, the oil pressure gauge indicates the oil pressure in the main oil passage of the engine lubrication system. It is composed of oil pressure indicator and oil pressure sensor. The oil pressure indicator is installed on the instrument panel. The oil pressure sensor is installed on the engine main oil passage or oil primary filter, and the two are connected through wires. Common oil pressure gauges include bimetallic oil pressure gauge and bimetallic oil pressure sensor, electromagnetic oil pressure gauge and resistive oil pressure sensor. Bimetallic oil pressure gauge is widely used.
Oil pressure alarm device
Oil pressure gauge vehicles equipped with oil pressure gauge are also equipped with oil pressure alarm lamp. When the oil pressure is lower than the normal value, the alarm lamp will turn on and send an alarm signal to the driver. The utility model is composed of an oil low pressure alarm lamp installed on the instrument panel and an oil pressure alarm sensor installed on the main oil passage of the engine.
Oil pressure indication system
There is no oil pressure gauge on the instrument panel of some models. The oil pressure indication system is used to monitor the oil pressure of the lubrication system. When the oil pressure is too low or too high, it will alarm through the oil pressure alarm lamp and buzzer.Some vehicles adopt the integrated electronic indication and alarm system of oil pressure and water temperature, which is composed of four LM339 chips and test and display circuits the working principle of the oil pressure gauge, that is, the 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
When the engine temperature is high, it is easy to produce oil sludge, so we need to pay attention to the maintenance of the engine and the selection of oil. It makes sense to choose high-quality engine oil. Why do high-quality engine oils, such as shell, pay great attention to the cleaning ability of products. It is because the oil is related to the lubrication, wear reduction, cooling and sealing of the engine. The oil with poor cleanliness often cannot prevent the accumulation of carbon. The accumulation of carbon in the engine will accelerate the wear of cylinder liner, piston and piston ring and cause serious damage to the engine.
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