Cylinder head of internal combustion engine

Abstract

The invention provides a cylinder head of an internal combustion engine, which is provided with a mixed gas inlet and an oil return hole on the combination part of the cylinder head and a crank case, wherein the mixed gas inlet and the oil return hole are respectively communicated with the crank case; a cylinder head oil chamber is formed between the upper part of the cylinder head and a cylinder head cover and is communicated with the mixed gas inlet, the oil return hole and an oil-gas separation cavity on the cylinder head cover; and the mixed gas inlet of the cylinder head is pressed with a mixed gas inlet tube the outlet height of which is higher than the oil surface height of lubricating oil in the cylinder head oil chamber. The invention omits the original baffles arranged around the mixed gas inlet of the cylinder head so as to relatively simplify the structure of the cylinder head, simplify the casting die of the cylinder head and improve the casting qualification rate of the cylinder head; and by changing the installation height of the mixed gas inlet tube, the cylinder head can be suitable for various types of entire vehicle arrangements, and the cylinder head has high popularity.

Description

technical field [0001] The invention relates to a crankcase forced ventilation system of an internal combustion engine, in particular to a ventilation structure of a cylinder head. Background technique [0002] When the internal combustion engine is running, the oil-air mixture entering the crankcase from the combustion chamber will affect the performance of the internal combustion engine and pollute the atmosphere. According to the requirements of laws and regulations, the current internal combustion engine adopts the forced ventilation system of the crankcase, and the mixed gas is introduced into the combustion chamber of the internal combustion engine through a specific passage for combustion. In order to make the structure of the internal combustion engine compact, the mixed gas inlet is generally arranged on the crankcase and the cylinder head. [0003] When the whole vehicle is running, the inclination angle of the internal combustion engine will change. At a certain ...

AI Technical Summary

Problems solved by technology

However, the arrangement of baffles around the gas mixture inlet of the cylinder head makes the structure of the cylinder head complex and increases the difficulty of casting the cylinder head

When the layout angle of the internal combustion engine on the vehicle changes, the height of the baffle needs to be adjusted, so the cylinder head casting mold needs to be adjusted, which makes the cylinder head casting mold not universal

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