Engine cooling water jacket structure and engine

Abstract

The invention provides an engine cooling water jacket structure. The engine cooling water jacket structure comprises a cylinder body water jacket arranged outside a multi-cylinder cylinder body and acylinder cover water jacket arranged at the top end of the cylinder body water jacket, wherein the cylinder body water jacket comprises a first cylinder body water jacket, a second cylinder body waterjacket and a third cylinder body water jacket arranged outside a cylinder bore of a cylinder, and the cylinder cover water jacket comprises a first cylinder cover water jacket for cooling a combustion chamber, a second cylinder cover water jacket for cooling an exhaust manifold and a third cylinder cover water jacket for communicating a water outlet of the second cylinder body water jacket and awater outlet of the third cylinder body water jacket, the water outlet of the first cylinder body water jacket respectively communicates with the second cylinder body water jacket, the first cylindercover water jacket and the second cylinder cover water jacket, water outlets of the first cylinder cover water jacket and the second cylinder cover water jacket communicate with the third cylinder body water jacket, cooling liquid flowing into the second cylinder body water jacket through the first cylinder body water jacket is discharged through the third cylinder cover water jacket, and coolingliquid flowing into the first cylinder cover water jacket and the second cylinder cover water jacket through the first cylinder body water jacket flows into the third cylinder cover water jacket and is discharged. The invention also provides an engine.

Description

Technical field [0001] The invention relates to the field of cooling of cylinder blocks of multi-cylinder internal combustion engines, in particular to an engine cooling water jacket structure and an engine. Background technique [0002] The engine water jacket generally only designs the cooling fluid channel at the part that needs to be cooled. The problem with this design is that it cannot uniformly cool each cylinder of the engine. In the existing technical solutions, generally only the problem that the cylinder block and cylinder head can be cooled and dissipated is considered, and this problem is solved by designing a layer of coolant jacket outside the cylinder. Although this solution has a simple structure, it achieves a single function. And it is impossible to achieve uniform cooling of each cylinder on the cylinder head, which causes unnecessary heat loss on the cylinder head, and is limited by the total performance of the water pump (ie, the total performance of cooling...

AI Technical Summary

Problems solved by technology

[0002] The engine water jacket generally only designs cooling liquid passages in the parts that need to be cooled. The problem with this design is that it cannot evenly cool each cylinder of the engine.

In the existing technical solutions, generally only consider the problem that the cylinder block and the cylinder head can be cooled and dissipated heat, and solve this problem by designing a layer of coolant jacket outside the cylinder. Although the structure of this solution is simple, the realized function is also single. And it is impossible to achieve uniform cooling of each cylinder on the cylinder head, which causes unnecessary heat loss on the cylinder head, and is limited by the total performance of the water pump (that is, the total performance of cooling), which cannot be further improved by increasing the compression ratio of the engine. thermal efficiency, thereby limiting the potential of the engine to reduce fuel consumption

[0003] Therefore, in the prior art, in order to ensure sufficient cooling of all cylinders, the purpose is usually achieved by increasing the flow rate of the water pump, but this will cause excessive cooling of some cylinders, resulting in unnecessary energy loss; at the same time, due to the Unnecessary heat dissipation is unavoidable, and the cooling requirements of the cylinder head are generally higher than those of the cylinder block. Therefore, how to design the structure of the coolant jacket on the cylinder head to achieve uniform heat dissipation of all cylinders and meet the cooling requirements of the cylinder head itself is very important. especially important

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