A kind of cylinder and cylinder head thereof

Abstract

The invention discloses a cylinder and a cylinder cover thereof. The cylinder cover comprises a cooling water cavity; the cooling water cavity is divided into an upper layer water cavity and a lower layer water cavity by a partition plate; the partition plate is provided with a water-passing hole used for introducing a coolant in the lower layer water cavity into the upper water cavity; the water-passing hole can guide the coolant in the upper water cavity; and a bottom plate on the exhaust side in the lower layer water cavity is provided with a flow concentration groove used for concentrating the coolant. According to the cylinder cover, the cooling water cavity of the cylinder cover is divided into upper and lower layers by the partition plate in the middle, and all water flows flow through a lower bottom plate, so that the cooling effect on a fire plate is strengthened, and meanwhile, the auxiliary actions of improving the rigidity and the strength of the cylinder cover are also realized; cooling water carries out cooling through the water-passing hole from bottom to top, thus the water passing area is enlarged, and the cooling effect of a nose bridge region is strengthened; in addition, the flow direction of the coolant can be regulated by guidance of the water-passing hole, so that more coolant flows towards a region needed to be cooled, and the cooling effect is further improved; and the flow concentration groove on the exhaust side in the lower layer water cavity can further improve the cooling condition on the exhaust side, thus the cooling efficiency is further improved.

Description

technical field [0001] The invention relates to the technical field of engines, in particular to a cylinder and a cylinder head thereof. Background technique [0002] As an important part of the engine, the cylinder head is used to seal the gas and form a combustion space together with the piston. The working environment is extremely harsh, and due to the action of high temperature and high pressure gas, the thermal stress and mechanical stress are very large. [0003] With the upgrading of diesel engine emissions, the degree of strengthening and power requirements increase, the cooling efficiency of the traditional cylinder head cooling water cavity structure is low, and the thermal load of the cylinder head cannot be effectively reduced. [0004] Therefore, how to provide a cylinder head cooling water cavity to improve the cooling effect of the cylinder head is a technical problem to be solved by those skilled in the art. Contents of the invention [0005] In view of t...

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