An online engine oil viscosity detection device and detection method thereof

Abstract

The invention discloses an engine oil viscosity online detection device and a detection method thereof. The device is sequentially connected with an oil sampling device composed of a solenoid valve, a liquid level sensor and a second temperature sensor, a constant flow pump and a pressure sensor through an oil supply pipeline. , a flow sensor, a pressure control valve and a cooling device. The device also includes a constant temperature oil bath box nested outside the sampling device, which is composed of a heater and a first temperature sensor, a data processing module connected to each sensor, and an electromagnetic A single-chip microcomputer connected to a valve, a heater, a constant flow pump and a pressure control valve; the detection method is to create a standard temperature for oil viscosity detection, simulate the actual working pressure of the engine oil, and combine a data processing module and a single-chip microcomputer to detect the oil viscosity online. The invention can monitor the viscosity of the engine oil in real time, the detection result is more scientific and accurate, and provides a more immediate and effective basis for changing the oil.

Description

technical field [0001] The invention relates to a detection device, in particular to an on-line detection device and a detection method for engine oil viscosity. Background technique [0002] After being used for a period of time, the viscosity of automobile engine oil will change due to impurities mixed in and changes in its physical and chemical properties, which will affect its lubricating ability and cause increased wear of auto parts. Therefore, it is very necessary to measure the viscosity of in-use engine oil . At present, there are mainly two detection methods for engine oil viscosity, namely offline detection and online detection. Off-line testing is to regularly sample the engine oil in use, and then send it to a special testing center for viscosity testing with a kinematic viscosity tester. High; the disadvantage is that the detection process is time-consuming and labor-intensive, and the oil samples to be tested can only be sent to the laboratory for testing, a...

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Problems solved by technology

It can be seen that the method of detecting the viscosity of the engine oil in the above two patents does not create an environment at a standard temperature (100°C), but detects the viscosity of the engine oil at a non-standard temperature, and then calculates the theoretical value at this time based on the viscosity-temperature characteristics of the engine oil. The viscosity value of the engine oil at the standard temperature, however, there is a certain error between the theoretical formula of the viscosity-temperature characteristics of the engine oil and the actual viscosity-temperature characteristics of the engine oil, especially as the temperature difference increases, the error gradually increases, so this method of detecting viscosity It is not ideal, but it is necessary to provide a detection method to directly detect the viscosity of engine oil under standard conditions

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