Oil filler cap assembly

Abstract

The invention belongs to the field of automobile engine fittings, and particularly relates to an oil filler cap assembly. The oil filler cap assembly is in a structure of a one-way valve, and at least comprises an upper cover, a valve casing part and a valve core, wherein the valve casing part is in a tube shape, the bottom of the valve casing part is provided with a hole passage which penetrates through the bottom wall of the valve casing part, the valve core is in elastic fit with the upper cover and / or the valve casing part, the elastic direction of the valve core is parallel with or intersected with the axis direction of the valve casing part, the bottom of the valve core extends towards the bottom wall of the valve casing part and is in abutting fit with an open-and-close type surface which is arranged in the hole passage of the valve casing part and acts towards the elastic direction, a gap is arranged between the valve core and the inner wall of the valve casing part, and the gap extends and communicates the outside ambient environment. The oil filler cap assembly has the advantage that the one-way valve mechanism is integrated on the basis of the original oil filler cap, the structure is simple, the practicality and convenience are realized, and the problems of increasing of internal pressure of the engine and the subsequent falling of an oil seal and oil leakage of a sealing surface due to blockage of ventilating driving pipes caused by icing of pipelines are solved, so the safety of the engine and the personnel is effectively protected.

Description

technical field [0001] The invention belongs to the field of automobile engine accessories, and in particular relates to an oil filler cap assembly. Background technique [0002] When the engine is working, a part of the combustible mixture and exhaust gas will always escape into the crankcase through the piston ring, and the gasoline vapor condensed into the crankcase will make the engine oil thinner and the performance will deteriorate. The exhaust gas contains water vapor and sulfur dioxide. The water vapor condenses in the engine oil to form foam, which damages the oil supply. This phenomenon is especially serious in winter; sulfur dioxide meets water to form sulfurous acid, and sulfurous acid forms sulfuric acid when it meets oxygen in the air. The appearance of oil not only deteriorates the oil, but also corrodes the parts. As the combustible mixture and exhaust gas escape into the crankcase, the pressure in the crankcase will increase, and the engine oil will seep fr...

AI Technical Summary

Problems solved by technology

[0004] However, while the engine crankcase ventilation system brings a lot of convenience, its existing defects are also becoming more and more prominent: when working in low temperature areas or in high-speed driving in winter and other low-temperature environments, the above-mentioned crankcase gas hose leaves the engine section. The distance from the temperature drops sharply, and the steam from the engine turns into water when it reaches the hose, and then affected by the regional temperature or the air flow during high-speed driving, the water in the hose will freeze and block the hose

Once the water in the pipe condenses into ice, it will directly cause the water vapor generated in the cylinder to be unable to be discharged normally, resulting in blockage of the crankcase ventilation system pipe, poor ventilation, and increased internal pressure of the engine; what's more, when the internal pressure of the engine When it is higher than the limit that the crankshaft oil seal and each sealing surface can withstand, the oil seal and each sealing surface will leak oil. In severe cases, the crankshaft oil seal will fall off, and the engine will be scrapped, which will cause personal safety problems

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