Air cylinder cover for four-valve diesel engine

Abstract

The invention discloses an air cylinder cover for a four-valve diesel engine, comprising an air cylinder cover body. An air inlet channel structure is arranged on the air cylinder cover body and comprises a total air inlet channel arranged at one side of the air cylinder cover body; the total air inlet channel is provided with a single air inlet channel and parallel cylinder-spanning dual air inlet channels, wherein the single air inlet channel is only communicated with the total air inlet channel and one air inlet seat ring hole; the parallel cylinder-spanning dual air inlet channels are simultaneously communicated with the total air inlet channel and the air inlet valve seat ring holes of two adjacent air cylinders; the parallel cylinder-spanning dual air inlet channels comprise a first branch channel, a second branch channel and a shared channel; the first branch channel and the second branch channel are respectively and directly connected with the air inlet valve seat ring holes of the two air cylinders and are respectively communicated with the shared channel; and the shared channel is connected with the total air inlet channel. Compared with the prior art, with the unique air inlet mechanism, the air cylinder cover disclosed by the invention can ensure that enough air enters the air cylinder; meanwhile, more space can be saved for setting a water jacket space; and the cooling requirement on the air cylinder cover is satisfied.

Description

technical field [0001] The invention relates to a cylinder head of a four-valve diesel engine, in particular to a cylinder head of a four-valve multi-cylinder diesel engine. Background technique [0002] At present, the domestic diesel engine cylinder head generally adopts a single intake port. The cylinder head with a single intake port has a simple structure, but the intake air volume is small, the power of the diesel engine is low, the fuel consumption is high, the diesel cannot be fully burned, and it cannot meet the continuously upgrading diesel engine emission requirements. In order to solve the defects of the aforementioned single-inlet cylinder head, technicians have developed a double-tandem-inlet cylinder head, which increases the amount of air intake by increasing the number of intake ports. Although the double-tandem intake port cylinder head can solve the problem of small intake air volume, the increased air passage occupies a large amount of space in the cylin...

AI Technical Summary

Problems solved by technology

Although the cylinder head with double tandem intake ports can solve the problem of small air intake, the increased air channels occupy a large amount of space in the cylinder head, making the cooling water jacket of the cast cylinder head, especially the water jacket in the nose bridge area of ​​the cylinder head, oversized. narrow

This defect is more obvious in small and medium four-valve diesel engines. It is difficult to cast through the nose bridge area of ​​the cylinder head that needs to be cooled most, so that the nose bridge area cannot be effectively cooled, and the cylinder head is prone to cracking, which in turn inhibits the engine power. Further improve

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