The invention provides a liquid level sensor. In the liquid level sensor, a signal input end is connected with a first connecting end of a first capacitor and a first connecting end of a liquid level detection equivalent circuit, one end of a diagnosis pull-up resistor is connected with the first connecting end of the liquid level detection equivalent circuit, and the other end of the diagnosis pull-up resistor is connected with a power supply; a second connecting end of the liquid level detection equivalent circuit and a second connecting end of the first capacitor are connected with one end of the diagnosis pull-down resistor, and the other end of the diagnosis pull-down resistor is grounded; the state of the detection contact of the liquid level sensor is judged by detecting the voltage of the first connecting end and the voltage of the second connecting end of the liquid level detection equivalent circuit, so that the abnormality of the detection contact is diagnosed. The invention further provides an automobile comprising the liquid level sensor.
本发明提供一种液位传感器。该液位传感器中,信号输入端与第一电容的第一连接端以及液位检测等效电路的第一连接端连接,诊断上拉电阻的一端与液位检测等效电路的第一连接端连接,诊断上拉电阻的另一端与电源连接;液位检测等效电路的第二连接端和第一电容的第二连接端均与诊断下拉电阻的一端连接,诊断下拉电阻的另一端接地;其中,通过检测液位检测等效电路的第一连接端和第二连接端的电压判断液位传感器的检测触点的状态,以诊断出检测触点的异常。本发明还提供一种包括上述液位传感器的汽车。
Liquid level sensor and automobile
液位传感器和汽车
2023-09-05
Patent
Electronic Resource
Chinese
IPC: | F01P Kühlung von Kraft- und Arbeitsmaschinen oder Kraftmaschinen allgemein , COOLING OF MACHINES OR ENGINES IN GENERAL / G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES / B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES / G01F Messen des Volumens, des Durchflussvolumens, des Massendurchflusses oder des Füllstandes , MEASURING VOLUME, VOLUME FLOW, MASS FLOW, OR LIQUID LEVEL |
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