Engine machine oil viscosity on-line detection device and detection method

Abstract

The invention discloses an engine machine oil viscosity on-line detection device and detection method. The provided device is connected with a machine oil sampling device composed of a solenoid valve, a liquid level sensor and a second temperature sensor, a constant flow pump, a pressure sensor, a flow sensor, a pressure control valve and a cooling device through oil supply pipes in order. The device comprises a constant temperature oil bath box embedded at the outer side of the sampling device and composed of a heater and a first temperature sensor, a data processing module connected with each sensor and a one-chip microcomputer connected with the solenoid valve, the heater, the constant flow pump and the pressure control valve. Through construction of machine oil viscosity detection standard temperature and simulation of practical working pressure of engine machine oil, combined with the data processing module and the one-chip microcomputer, on-line detection of the machine oil viscosity is carried out. The machine oil viscosity can be monitored in real time, detection results are scientific and accurate, and in-time and effective basis is provided for oil change.

Description

technical field [0001] The invention relates to a detection device, in particular to an on-line detection device of engine oil viscosity and a detection method thereof. Background technique [0002] After being used for a period of time, the viscosity of automobile oil will change due to the mixing of impurities and the change of its own physical and chemical properties, which will affect its lubricating ability and cause the wear of automobile parts to increase. Therefore, it is very necessary to test the viscosity of the oil in use. . At present, there are two main ways to detect oil viscosity, namely offline detection and online detection. Offline testing is to regularly sample the oil in use, and then send it to a special testing center, and use a kinematic viscosity tester for viscosity testing. The disadvantage is that the detection process is time-consuming and labor-intensive, and the oil sample to be tested can only be sent to the laboratory for testing, and real-...

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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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