Vermicular graphite cast iron cylinder cover for automobile engine

Abstract

The invention relates to a vermicular graphite cast iron cylinder cover for an automobile engine. The vermicular graphite cast iron cylinder cover comprises a cylinder cover component and fastening components; when the vermicular graphite cast iron cylinder cover is used, the front side of the cylinder cover component faces downwards and is in butt joint with an engine oil cylinder; a plurality ofgroups of valve guide pipe holes A and valve guide pipe holes B are formed and correspondingly connected with different oil pipes; extension arms, a butt-joint groove A and a butt-joint groove B arearranged, so that the tight connection degree of the engine oil cylinder and an engine cover body is improved, and the oil leakage risk caused to the untight engine oil cylinder is reduced; when the vermicular graphite cast iron cylinder cover is used, outer sleeves are rotated by a hand, the outer sleeves rotate to drive sleeve walls to rotate, arc-shaped sliding grooves rotate along with the sleeve walls, spiral structures of the sliding grooves enable sliding blocks to spirally descend to drive top shafts to be extruded inwards, the bottom surfaces of the top shafts are tightly close to the engine oil cylinder, when the top shafts re extruded downwards, the engine cover body is driven by the counter-acting force to be separated from the engine oil cylinder, the condition that the cylinder cover body is adsorbed by the suction caused by the difference between the internal pressure and the external pressure generated when the oil cylinder is no-load is prevented, and the vermicular graphite cast iron cylinder cover is high in practicability.

Description

technical field [0001] The invention relates to the technical field of automobile engines, in particular to a vermicular graphite cast iron cylinder head for automobile engines. Background technique [0002] The cylinder head is installed on the top of the cylinder block, sealing the cylinder from the top and forming the combustion chamber. It is often in contact with high-temperature and high-pressure gas, so it bears a large thermal load and mechanical load. The cylinder head of the water-cooled engine is equipped with a cooling water jacket. The cooling water hole on the lower surface of the cylinder head communicates with the cooling water hole of the cylinder body, and the circulating water is used to cool the high temperature parts such as the combustion chamber. Exhaust valves, as well as intake passages and exhaust passages. The cylinder head of the gasoline engine is processed with a hole for installing the spark plug, while the cylinder head of the diesel engine i...

AI Technical Summary

Problems solved by technology

[0003] The existing engine cylinder heads are mostly made of gray cast iron, but the traditional gray cast iron cylinder heads can no longer meet the requirements of high explosion pressure, high power density and light weight of heavy-duty diesel engines, and in actual use, when the engine cylinder When there is no load, there will be a pressure difference between the inside and outside of the oil cylinder. This pressure difference will usually cause the cylinder head to be tightly adsorbed on the oil cylinder. oil, poor usability

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