Motorcycle engine cylinder

Abstract

The invention relates to a cylinder of motorcycle engine, which comprises a cylinder cover and a cylinder body connected via bolt, wherein the cylinder cover and cylinder body are combined on the inlet and outlet channels; the combine surface of cylinder cover is arranged with grooves for forming inlet and outlet channels; said grooves are arranged with valve hole for mounting valve tube; the combine surface of cylinder body is arranged with grooves relative to the grooves of the combine surface of cylinder cover to form inlet and outlet channels; said grooves are through to the inlet and outlet of burning room; the burning room is at the upper part of cylinder hole of cylinder body; the burning room has spark plug hole; the cylinder cover is combined with burning room, and the grooves of cylinder cover and the grooves of cylinder body will form inlet and outlet channels. The invention can change the position of combine surface between cylinder cover and cylinder body, to confirm the sealing property of burning room, to improve the gas charge efficiency of engine and improve the inlet and outlet amounts of engine.

Description

Technical field [0001] The invention belongs to the field of cylinders of combustion engines, and particularly relates to a cylinder of a motorcycle engine. Background technique [0002] At present, the cylinders of motorcycle engines are roughly divided into two categories: One type of cylinder head and cylinder block are separated and fastened together by bolts. Since the cylinder head and the cylinder body are separately processed, this type of cylinder is easy to process and easy to assemble. Therefore, the current motorcycles mostly use this type of cylinder. However, this type of cylinder is generally provided with a combustion chamber on the joint surface of the cylinder head and the cylinder block, and the intake and exhaust passages are arranged on the cylinder head to communicate with the combustion chamber, or on the cylinder block to communicate with the cylinder bore. Because the combustion chamber is located on the joint surface, and the area of ​​the joint surface ...

AI Technical Summary

Problems solved by technology

Since the combustion chamber is located on the joint surface, and the area of ​​the joint surface is relatively large, it is not easy to achieve an absolute plane during processing, and there are more or less tiny gaps that cannot be detected with ordinary measuring tools, and some tiny gaps will also close the combustion chamber. It communicates with the atmosphere, which affects the performance of the engine. Although the joint is sealed with gaskets during assembly, absolute sealing is not easy to achieve

The other type of cylinder head and cylinder block are integrated. This type of cylinder has holes in different directions on it, so it is difficult to cast and remove the mold, and it is difficult to process. Moreover, when the cylinder is working, once the cylinder is held or pulled phenomenon, the entire cylinder will be scrapped, the maintenance cost is high, and it will cause a large economic burden to the user, so the current motorcycles are seldom used.

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