Device and method for measuring oil consumption of engine

Abstract

The invention provides a device and method for measuring the oil consumption of an engine. The measuring device is composed of an oil filling tank, an observation window, an oil drain valve, an oil collecting tank, a vent pipe, a lifting platform, a camera, an electronic scale and the like. During measurement, when the working condition is in stable operation, the engine oil liquid level is relatively stable, and an oil level line which is flush with a valve opening in a visual oil level pipe is used as the basis reference. On the basis of the variation of the relative quality of engine oil added into the engine within a testing time period, the oil consumption of the engine within the testing time period is tested, and the relative variation of the oil weight is accurately measured through the accurate measurement and the zero clearing operation of the electronic scale. Meanwhile, measurement is conducted under the state that the engine is not stopped, the influence of operation condition difference of the engine and the oil storage amount difference of a filter under different working conditions on the oil consumption measurement result is avoided, and the measurement precision of the oil consumption of the engine is improved. In the testing process, it is guaranteed that the oil in the engine is placed above the normal operation liquid level, and the engine is prevented from being damaged.

Description

technical field [0001] The invention relates to the technical field of engine performance testing, and more particularly relates to an engine oil consumption measuring device and a measuring method. Background technique [0002] Engine oil consumption measurement belongs to an important measurement index in the engine performance test, and engine oil consumption measurement method mainly contains following several in the prior art: 1, SO 2 The tracer method has high precision, but the equipment is expensive; 2. Calibrate the oil pan level, and the oil consumption can be obtained by looking at the change of the liquid level. The method is cumbersome, and the oil pan level needs to be calibrated, which is prone to errors; The method has high precision, but the decay period of radioactive substances is short, there is no domestic manufacturer, and the damage to the human body has yet to be investigated, and it cannot be widely used; 4. The national standard oil discharge method...

AI Technical Summary

Problems solved by technology

These two methods have serious defects in actual use. Among them, the disadvantages of the Chinese standard oil drain method are that there are many measurement steps, which are prone to errors, the amount of oil poured in and out is large, and the manual oil drain operation is cumbersome. Rotate the crankshaft, and the oil drain time is long, the repeated test frequency is low, and leakage is prone to occur, which increases the test error, and after each shutdown, the amount of oil stored in the engine oil filter is different, which will cause each engine failure. There are errors in fuel consumption measurement due to the difference in oil storage in the oil filter, and the accuracy of the weighing equipment is not high due to the large measuring range. In practical applications, the accuracy and precision of this method are very poor.

The oil pan liquid level calibration method needs to calibrate the corresponding relationship between the oil level height and the oil weight in advance. The measurement accuracy is greatly affected by the calibration result and the calibration work is very cumbersome. The change in surface height is very small, and the pressure sensor needs to be able to sense the change of oil surface height with high precision, so the pressure sensor is very expensive, which makes the price of the measuring equipment unacceptable to manufacturers, so this method is difficult to promote in actual use and has no effect. poor

Therefore, a kind of engine oil consumption measurement technology that can realize high precision in a low-cost manner has not yet appeared in the prior art

Images