Integral cylinder cover of water-cooled four-valve diesel engine and corresponding diesel engine water cooling method

Abstract

The invention discloses an integral cylinder cover of a water-cooled four-valve diesel engine and a corresponding diesel engine water cooling method based on the cylinder cover. According to the cylinder cover, a partition plate for partitioning a water cooling cavity into an upper cavity and a lower cavity is arranged in the water cooling cavity, wherein a water feeding passage for communicating the upper cavity and the lower cavity is formed on one side of the partition plate; a bottom plate is provided with an exhaust duct side exhaust hole corresponding to the water feeding passage; and a water inlet hole and an intake duct side exhaust hole which are communicated with the lower cavity are formed on the other side of the bottom plate. The diesel engine water cooling method comprises the following steps of: circulating water cooling outside a diesel engine cylinder from one side to the other side through a circulating water pump; and flowing the cooling water into the lower cavity from the water inlet hole on the bottom plate of the cylinder cover, then flowing to the upper cavity through the water feeding passage from the lower cavity and flowing out from the water outlet. By arranging the partition plate in the cylinder cover, forced cooling water passes through a nose bridge region so as to guarantee a cooling effect of the noise bridge region and the bottom plate of the cylinder cover; and bubbles produced on the outer wall of the cylinder can be quickly washed away and vapor can be discharged, so that cooling water of high water temperature does not easily occur in the diesel engine.

Description

technical field [0001] The invention relates to the technical field of engine machinery, and more specifically relates to an integral cylinder head of a water-cooled four-valve diesel engine and a corresponding water-cooling method for the diesel engine. Background technique [0002] When the diesel engine is working, the cylinder of the engine is heated, which will cause air bubbles to form on the outer wall of the cylinder immersed in the cooling water. The thermal conductivity of the gas is lower than that of the cooling water. Therefore, the generation of air bubbles is not conducive to the cooling of the engine. The air bubbles need to be eliminated in time. The traditional method is to circulate the cooling water to wash away the generated air bubbles, thereby improving the cooling effect. However, the traditional water-cooling method has many limitations, especially the cooling of the cylinder head is not sufficient, the short circuit of the cooling water is easy to o...

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Problems solved by technology

However, the traditional water-cooling method has many limitations, especially the cooling of the cylinder head is not sufficient, the short circuit of the cooling water is easy to occur in the cylinder head, and there is a dead angle where the cooling water does not flow smoothly. Therefore, the nose bridge area of ​​the cylinder head and the cylinder head bottom plate Insufficient cooling makes the bridge of the nose easy to crack, and the water vapor generated by the heating of the cooling water is not exhausted completely. When the water temperature rises, sometimes it is easy to boil, resulting in a large number of air bubbles on the outer wall of the cylinder, which further reduces the cooling effect

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