Lubricating method and lubricating structure of four-stroke gasoline engine

Abstract

The invention discloses a lubricating method and a lubricating structure of a four-stroke gasoline engine. Pressure generated by downward movement of a piston inside a crankcase coordinates with a crankshaft and structural movement of the crankshaft to atomize lubricating oil, pressure difference between the crankcase, a gas-oil separating chamber and a valve chamber is employed to make oil mist enter the lubricating travel in order to lubricate associated parts, and an inlet one-way valve and an outlet one-way valve are used for separating oil and gas and returning the lubricating oil. The atomization of the lubricating oil and the lubricating movement of the oil mist are implemented in the same device through two steps of beating and atomization of the lubricating oil and the lubricating movement of the oil mist, which is characterized by simple steps, less parts, low cost and high reliability. A vent hole of the crankshaft is used for ensuring that the lubricating oil can never enter the gas-oil separating chamber whether a motor works or not, and the lubricating structure can continuously and effectively work for more than two hours during 360 degrees turning without flameout and smoking.

Description

technical field [0001] The invention relates to a lubricating method and structure of a gasoline engine, in particular to a lubricating method and structure of a four-stroke gasoline engine. Background technique [0002] At present, the application fields of small general-purpose gasoline engines are becoming more and more extensive at home and abroad. In many occasions, such as: chain saws, shearing machines, military generators, etc., the engine is required to work effectively and normally in any direction within the range of 360°. But the problem that existing small general-purpose gasoline engine exists is: can't effectively solve the lubrication problem in 360 ° range, and when inverting, oil enters combustion chamber and causes flameout, and repeated starting is difficult. [0003] There are two typical lubricating systems for small general-purpose gasoline engines that can work normally within the range of 360°: one is the lubricating system disclosed by the Japanese ...

AI Technical Summary

Problems solved by technology

However, the problems existing in the existing small general-purpose gasoline engines are: the lubrication problem in the range of 360° cannot be effectively solved, and the oil enters the combustion chamber when it is inverted, resulting in flameout, and it is difficult to start repeatedly

[0005] The generation of oil mist in the lubricating system disclosed in the Japanese patent is formed by stirring the lubricating oil through the oil thrower 2, and then the oil mist enters the crankcase chamber 6 through the oil supply passage 3 for lubrication, and the lubricating oil atomization and the oil mist are separated. The lubricating action is completed in two devices through two steps; the oil mist generation process of the lubricating system disclosed in the Chinese patent is to drive the lubricating oil through the driving lubricating oil pump 24 of the eccentric mechanism 26, and spray the lubricating oil through the oil supply channel 25 On the connecting rod of the crankcase chamber 29 and the gear of the gear chamber 211, oil mist is formed under the impact of the gears, and the lubrication action of the oil mist is realized under the action of the pressure difference. The lubrication of this system is through the transmission of lubricating oil, The lubricating action of lubricating oil atomization and oil mist is realized in three steps, and the three steps are completed in two devices; both of these two patents have the same disadvantages, that is, there are many steps, complex structures, and high cost. Low reliability, and the lubricating oil in the crank chamber is easy to flow into the combustion chamber

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