Water jacket air-cooled pre-combustion device

Abstract

The invention provides a water jacket air cooling type pre-combustion device. The water jacket air cooling type pre-combustion device is characterized by comprising a pre-combustion chamber cavity shell, a pre-combustion chamber upper seat, a sparking plug connecting bar and a pre-combustion chamber water jacket; a first annular gap is formed between the sparking plug connecting bar and the inner wall of the pre-combustion chamber upper seat and serves as an air inlet channel; a first through hole is formed between the outer wall of the pre-combustion chamber water jacket and the inner wall of an air cylinder cover and serves as a water inlet channel; a second annular gap is formed between the inner wall of the pre-combustion chamber water jacket and the outer wall of the pre-combustion chamber cavity shell; at least one second through hole is formed in the wall of the pre-combustion chamber upper seat; and a plurality of third through holes are formed in the wall of the pre-combustion chamber upper seat and serve as second cooling water channels. According to the water jacket air cooling type pre-combustion device, cooling and heat dissipation can be conducted on the sparking plug connecting bar, a sparking plug, the pre-combustion chamber upper seat, the pre-combustion chamber cavity shell and spray nozzles, and the heat dissipation efficiency is high.

Description

technical field [0001] The invention relates to an internal combustion engine, in particular to a pre-combustion device for the internal combustion engine. Background technique [0002] Large-displacement gas-fired internal combustion engines generally adopt pre-chamber ignition technology. After a small amount of fuel gas is delivered to the pre-chamber, the spark plug in the pre-chamber housing generates electric sparks to ignite the mixture of fuel gas and air to generate flames and spray them out through the nozzle. The ejected flame ignites a large amount of fuel gas mixture in the combustion chamber, and then burns to do work. [0003] In the prior art, the cylinder head of the internal combustion engine is closely attached to the pre-chamber housing to form a structure with a large overall thickness. After working for a long time, the temperature of the pre-chamber casing is as high as several hundred degrees, and the temperature of the spark plug is also very high. ...

AI Technical Summary

Problems solved by technology

[0004] The high temperature of the pre-chamber housing can cause many problems. On the one hand, too high a temperature may reach the ignition point of the fuel gas mixture, which will cause the fuel gas mixture to burn immediately when it comes into contact with the housing, without being ignited by the spark plug That is to say, the high-temperature pre-combustion chamber will keep burning inside the gas internal combustion engine, and it cannot be ignited by the spark plug to normally control and burn to do work, that is, it cannot work normally.

On the other hand, if the temperature is too high, the nozzle of the pre-combustion chamber will be melted and damaged due to overheating, or the direction of the nozzle hole will be shifted, which will cause the internal combustion engine to fail to work normally.

[0005] In addition, the high temperature of the spark plug will also make the ignition unsafe. If it is mild, it will cause a fire phenomenon. If it is more serious, it may burst due to thermal deformation, and the service life of the spark plug will be greatly shortened.

Images