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What is the working principle of an oil pressure sensor?

1 Answers

LeJackson

07/30/25 9:13am

The working principle of an oil pressure sensor is: 1. The amplified pressure signal is transmitted through a signal wire to the oil pressure gauge, altering the current ratio between the two coils inside the gauge to indicate the engine's oil pressure; 2. The pressure signal, after voltage and current amplification, is also compared with the preset alarm voltage in the alarm circuit. When the signal falls below the alarm voltage, the alarm circuit outputs an alarm signal and illuminates the warning light via the alarm wire. Solutions for excessively high oil pressure include: 1. Adjusting the clearance between the shaft neck and bearing in pressure-lubricated areas; 2. Cleaning the oil pipes and passages, and maintaining the filter; 3. Selecting the appropriate oil grade; 4. Replacing the oil with one of suitable viscosity; 5. Inspecting and adjusting the pressure relief valve on an oil pump test bench to ensure the oil pressure meets specified requirements.

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