A Method for Determining the Filling Quantity of Automobile Engine Engine Oil

Abstract

The invention discloses a determination method for the filling amount of engine oil of an automobile engine. The determination method comprises a determination method for the minimum amount V1 of the engine oil needed by an engine oil pan in the engine operation process and a determination method for the maximum amount V2 of the circulating engine oil in the engine operation process. The determination method for the minimum amount V1 of the engine oil needed by the engine oil pan in the engine operation process comprises the steps of 1, determining the horizontal acceleration of a whole automobile on various extreme conditions; 2, selecting the horizontal acceleration a of the engine oil in the engine oil pan in the engine operation process; 3, calculating the dip angle alpha of the liquid level of the engine oil in the engine oil pan; 4, calculating the minimum amount of the engine oil in each direction; 5, determining the minimum amount V1 of the engine oil needed by the engine oil pan in the engine operation process. According to the determination method, the amount of the engine oil needed by the engine can be accurately determined at the initial stage of development, and the cost of development can be lowered.

Description

technical field [0001] The invention belongs to the field of automobile engines, and in particular relates to a method for determining the filling quantity of engine oil of an automobile engine. Background technique [0002] As an important medium of the engine, engine oil can lubricate friction, drive hydraulic components, cool, clean, etc. It is very important to the engine. If the amount of engine oil filling is too small (that is, the amount of engine oil added to the engine is too small), the engine will not be able to establish oil pressure normally under certain working conditions, resulting in increased wear, hydraulic components cannot work normally, and even bearing bush damage, Serious faults such as crankshaft lock will affect the driving safety of users; if the oil filling volume is too large (that is, too much oil is added to the engine), it will increase the burden on the oil-air separation system, causing abnormal consumption of engine oil, and will also incr...

AI Technical Summary

Problems solved by technology

Since the initial oil filling amount is obtained based on experience, it cannot clarify the actual demand of the engine, which will make the later test input inaccurate, resulting in insufficient verification or repeated verification, increasing the development cycle and development cost; and if using Engine tilt tests to verify oil fill levels also increase engine development costs as engine tilt test rigs are expensive

[0004] CN103967559A discloses a method for determining the minimum amount of engine oil in the oil pan and the amount of oil reduction during operation. It specifically describes the method for determining the amount of oil reduction when the engine is running (equivalent to the maximum circulating oil amount when the engine is running). Add the reduced amount of engine oil to the oil capacity when the oil level is below the lower line of the oil filter (equivalent to the minimum amount of oil required in the oil pan when the engine is running), and you can get the minimum amount of oil in the oil pan (equivalent to the minimum amount of oil in the engine oil pan). However, it does not describe the method for determining the oil capacity when the oil level is below the lower line of the oil filter, and the method for determining the oil reduction when the engine is running does not take into account the effect of engine speed changes on the oil reduction. The impact is not comprehensive enough, and the result of the determined oil reduction when the engine is running is not accurate enough and prone to deviation

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