function of oil pressure sensor

• 2022-09-28

The function of the sensor is to monitor, and the oil pressure sensor is naturally used to detect the oil pressure. Once it detects insufficient oil pressure, it will alarm. But if the sensor fails, it won't affect your fueling, but it's also impossible to monitor the oil pressure. Once a problem occurs, it can also lead to engine failure, so be sure to know the oil pressure. The role of the oil pressure sensor. The oil pressure sensor is used by you to detect the oil pressure. When the pressure is insufficient, it will alarm and the oil light on the instrument panel will light up. If there is no sensor, the engine will be irreversibly damaged when there is a problem such as lack of oil, so the oil pressure sensor plays a vital role.

How to judge whether the oil pressure sensor is bad?

If there is no pressure indication on the oil pressure gauge at all engine speeds, the oil pressure sensor is damaged or the engine lubrication system is faulty. If the engine has not started after the ignition switch is turned on, the pointer of the oil pressure gauge has moved to the maximum pressure value, indicating that the oil pressure gauge is grounded to the sensor line, etc. Or the oil pressure sensor is internally grounded. If the oil pressure indicator does not go out after the engine is running, the oil pressure sensor switch is damaged. Or the alarm indicator lead is grounded to the sensor switch. If the short circuit is normal, it means that your sensor is a normally open switch output. There are only two switch states: on/off. If there is oil in the chassis but the sensor still has no output, the sensor is broken. See if your sensor is bi-wired. If yes, connect a small bulb (5-24V) in series and see if the bulb turns on. If not, the sensor is bad (oil is present). If the sensor is broken, it will naturally have to be replaced, and the workload is still very small.

The role of the engine oil pressure sensor is as follows:

1.Set to detect the oil pressure: The oil pressure sensor is installed on the main oil passage of the engine. When the engine is running, the pressure measuring device detects the oil pressure, converts the pressure signal into an electrical signal, and sends it to the signal processing circuit. After voltage amplification and current amplification, the amplified pressure signal is connected to the oil pressure gauge through the signal line to change the oil pressure.

2. The transmission of alarm: through the current ratio of the two coils in the pressure indicator to indicate the engine oil pressure. After voltage amplification and current amplification, the pressure signal is compared with the alarm voltage set in the alarm circuit. When the alarm voltage is lower than the alarm voltage, the alarm circuit outputs an alarm signal and lights the alarm lamp through the alarm line.