Water-cooled precombustion device

Abstract

The invention provides a water-cooled precombustion device which is characterized in that the water-cooled precombustion device comprises a precombustion chamber component and a flame nozzle; the precombustion chamber component is fixedly arranged in an inner cavity, and comprises a precombustion chamber housing vertically embedded into the inner cavity, and a spark plug arranged in the precombustion chamber housing; the precombustion chamber housing comprises a precombustion chamber upper seat and a precombustion chamber cavity housing that are arranged from the top down sequentially; the flame nozzle is detachably arranged on the precombustion chamber cavity housing, and comprises a cylindrical barrel provided with a cavity; a plurality of penetrating flame channels and a plurality of nozzle cooling water channels are formed in the cylindrical barrel; the nozzle cooling water channels and the flame channels are arranged in a staggered manner; a through hole between the precombustion chamber component and an air cylinder cover acts as a water inlet channel; and cooling water is introduced into the water inlet channel via an exterior internal combustion engine circulation line, and then enters the nozzle cooling water channels, and the cooling water flows in the nozzle cooling water channels, undergoes heat exchange and then flows out. The water-cooled precombustion device can allow the flame nozzle to be cooled and be subjected to heat dissipation, the heat dissipation efficiency is high, and the service life of the flame nozzle of a precombustion chamber can be prolonged.

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 hours of work, the temperature of the pre-chamber casing reaches several hundred degrees. [0004] The high temperature of the pre-chamber housing can cause many ...

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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 shell will keep burning inside the gas internal combustion engine, and it cannot be normally controlled by spark plug ignition and burns 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 injection hole will be shifted, which will cause the internal combustion engine to fail to work normally; and the service life of the spark plug will be greatly shortened.

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