Automobile engine oil pressure monitoring method

Abstract

The invention discloses an automobile engine oil pressure monitoring method. An automobile comprises an engine oil pressure sensor, an engine electric control unit (ECU) and a fault indicating device. The method comprises the following steps of: detecting the current engine oil pressure by using the engine oil pressure sensor at intervals of a predetermined time, judging whether the current engine oil pressure is in a calibration range by the ECU, and synchronously judging whether an insulate value of an engine oil pressure difference between the current engine oil pressure value and the engine oil pressure value of the last detection is in the libration range by the ECU; when the current engine oil pressure is not in the calibration range and / or the engine oil pressure difference between the current engine oil pressure value and the pressure value of the last detection is not in the libration range, performing fault treatment by the ECU and activating the fault indicating device. With the adoption of the automobile engine oil pressure monitoring method, the abnormal change of the engine oil pressure occurred in a libration zone can be monitored, so that a latent problem of the automobile is can be warned early.

Description

technical field [0001] The invention relates to the monitoring technology of the automobile engine, and in particular to a method for monitoring the oil pressure of the automobile engine. Background technique [0002] Engine oil plays the role of lubrication, cooling and cleaning in the car engine. The working state of engine oil in the engine directly affects the performance and service life of the engine. [0003] Engine oil pressure and temperature are important parameters for engine oil work. Engine oil pressure and temperature must be within a certain range for the engine to work normally, and there is a certain relationship between oil pressure and temperature. When the car is running, the oil pressure should generally be kept at 200kPa ~ 500kPa; when the engine temperature is high and the speed is low, the oil pressure should not be lower than 200kPa; when the engine temperature is low and the speed is high, the oil pressure should not be higher than 500kPa. When t...

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Problems solved by technology

[0005] The above-mentioned engine oil monitoring system and monitoring method can monitor whether the engine oil pressure and temperature exceed the safe range. However, during the actual operation of the vehicle, the oil pressure may be within the calibration range due to problems such as oil passage blockage, oil pump aging, and oil collector cracks. Abnormal changes occur in the engine oil, the above oil monitoring system and monitoring method can not give early warning for this situation, only when the problem worsens and the oil pressure exceeds the calibration range, it will alarm

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