Multicylinder engine cylinder head with pre-cast cooling water jacket

Abstract

The invention discloses a multicylinder engine cylinder head with a pre-cast cooling water jacket. The multicylinder engine cylinder head comprises a cylinder head mounted on a cylinder body, wherein a cooling water jacket is arranged between two exhaust passages of the cylinder head and positioned at the upper part of a combustion chamber, and is communicated with a cooling water passage of the cylinder body through two water jacket water inlet holes in the lower parts of the exhaust passages; a guide plate is arranged in the cooling water jacket, and comprises a vertical plate and a spreader plate; the water jacket water inlet holes are formed in the transverse side of the vertical plate; the spreader plate is arranged between the two water jacket water inlet holes; one end of the spreader plate is connected onto the vertical plate, and the other end of the spreader plate extends towards the space between the two exhaust passages of the cylinder head. According to the invention, the guide plate for cooling the area between the two exhaust passages is formed when the cylinder body is cast, each cylinder has the guide plate, and the guide plate can guide cooling water to the space between the two exhaust passages of each cylinder, so that heat transmitted through high-temperature exhaust can be taken away quickly, and the dynamic property and reliability of the engine can be improved.

Description

technical field [0001] The invention relates to the technical field of engines, in particular to a cylinder head of a multi-cylinder engine precast with a cooling water jacket. Background technique [0002] At present, the cylinder head structure of the existing multi-cylinder engine is generally provided with a cooling water jacket. However, due to the limitation of the engine space and the strength requirements of the cylinder head structure, it is often difficult to ensure that the water passage between the two exhaust passages of each cylinder of the cylinder head can quickly pass through the cooling water, so the area between the exhaust passages is very small. It is easy to form a dead zone where cooling water flows, and the cooling effect of the exhaust passage becomes poor, which affects the power and reliability of the engine. [0003] In the patent application number 200910191307.3, a small engine cylinder head invention patent with a pre-cast cooling water jacket...

AI Technical Summary

Problems solved by technology

However, due to the limitation of the engine space and the strength requirements of the cylinder head structure, it is often difficult to ensure that the water passage between the two exhaust passages of each cylinder of the cylinder head can quickly pass through the cooling water, so the area between the exhaust passages is very small. It is easy to form a dead zone where cooling water flows, and the cooling effect of the exhaust passage becomes poor, which affects the power and reliability of the engine

[0003] In the patent application number 200910191307.3, a small engine cylinder head invention patent with a pre-cast cooling water jacket is disclosed. The water channel is connected through a machine-added water jacket water hole, although it is guaranteed that the cooling water flows from the water channel of the cylinder body through the machine-added water jacket water hole, and finally flows into the cooling water jacket of the cylinder head, so that the gap between the two exhaust channels It has been well cooled, but the disadvantage is that machining is required, so it is necessary to prepare corresponding hardware equipment such as cutting tools, machine tools, and tooling for the cylinder head, which increases the cost, and the cooling effect on the two exhaust channels is not ideal

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