oil temp gauge calibration cessna

• 2022-11-17

A vehicle oil metering and calibration system includes a vibration speed sensor, a gas pressure sensor, a oil level measurement system, a pressure relief valve, an air pump, an inert gas tank, and an on-board oil temperature sensor. The vehicle mounted oil tank is equipped with an air pump, the air pump is connected to the inert gas tank, the pressure relief valve is installed in the vehicle mounted oil tank, the vibration speed sensor, the air pressure sensor, the oil level measurement system The on-board oil temperature sensors are connected to the CAN bus and connected to the vehicle ECU by the CAN bus. The air pressure sensor, oil level measurement system and on-board oil temperature sensor are installed inside the vehicle mounted oil tank.

Furthermore, the vibration speed sensor used to detect the static state of the vehicle sends a first signal to the ECU through the CAN bus connected to it when the vehicle is stationary. The ECU receives the first signal and outputs the signal of the oil volume in the vehicle mounted oil tank. In addition, the air pressure sensor measures the air pressure in the oil tank and sends a second signal to the ECU through the CAN bus connected to it. The ECU receives the second signal and outputs the pressure relief command to the pressure relief valve, The pressure make-up signal is output to the air pump connected to the inert gas tank. The pressure relief valve is used for the pressure relief of the vehicle mounted oil tank, and the micro air pump is used for the pressure make-up of the vehicle mounted oil tank. Furthermore, the said vibration speed sensor used to detect the static state of the vehicle will collect the gas pressure signal in the vehicle mount tank in real time when the vehicle is running, send a third signal to the ECU through the CAN bus it is connected to, and the ECU will output the oil loss represented by the gas pressure signal to the CAN bus.

Furthermore, the float potentiometer is connected in series with the instrument panel oil gauge, the vibration speed sensor is a CD-1 vibration speed sensor, and the micro air pump is an axial compressor. Beneficial effects: In the above scheme, a vibration speed sensor is added to the oil allowance measurement system to detect the driving or stopping state of the car. Once it detects that the car is stopped, restart the oil level measurement system to detect the oil level, use the air pressure sensor to measure the pressure in the oil tank, and use the micro air pump and inert gas tank to maintain the pressure constant, The oil level is measured again under constant pressure every time the vehicle is stopped, forming a calibrated oil level calibration under static state. Each stop state is detected, and the oil level is calibrated once, so that the accuracy of oil level measurement is improved.

On the other hand, the added air pressure sensor detects the gas pressure, and the micro air pump and inert gas tank maintain the constant gas pressure in the oil tank. When the vibration speed sensor detects that the vehicle is running, it monitors the pressure change in real time to obtain the instantaneous oil consumption value. From the above, the accurate residual oil level can be obtained by calibration when the vehicle is stationary, and the instantaneous oil consumption value can be measured with the change of oil tank pressure when the vehicle is driving, so as to further improve the accuracy of oil quantity detection.