Large-cylinder-diameter single-cylinder gas internal combustion engine and multi-cylinder gas internal combustion engine

Abstract

The invention provides a large-cylinder-diameter single-cylinder gas internal combustion engine and a multi-cylinder gas internal combustion engine. The large-cylinder-diameter single-cylinder gas internal combustion engine comprises a gas cylinder and a gas cylinder cover arranged on the gas cylinder and provided with an inner cavity, and is characterized in that a water cooling and air cooling type pre-combustion device, an air inlet device, a cooling water inlet device and a gas inlet control device are further included; the water cooling and air cooling type pre-combustion device is arranged on the gas cylinder and used for igniting introduced pre-combustion gas and spraying flames so as to ignite gas cylinder gas in a combustion chamber of the gas cylinder; the air inlet device communicates with the water cooling and air cooling type pre-combustion device through a gas inlet pipeline and is used for sucking outside air and blowing the air into the water cooling and air cooling type pre-combustion device; the cooling water inlet device is provided with a water inlet end and a water outlet end and used for conveying cooling water and comprises a water circulating pipeline communicating with the water cooling and air cooling type pre-combustion device and a circulating water pump arranged on the water circuiting pipeline; and the gas inlet control device is provided with a gas inlet, a first outlet communicating with the water cooling and air cooling type pre-combustion device and a second outlet communicating with the combustion chamber and used for controlling the gas inlet quantities of the pre-combustion gas and the gas cylinder gas.

Description

technical field [0001] The invention relates to an internal combustion engine, in particular to a large-bore single-cylinder gas internal-combustion engine and a multi-cylinder gas internal-combustion engine including the large-bore single-cylinder gas 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 temperatu...

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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.

In addition, the high temperature of the spark plug will also make the ignition unsafe, and the phenomenon of flashing fire will occur at the slightest, and it may burst due to thermal deformation if it is more serious.

[0005] In order to cool the pre-chamber housing and spark plugs, one way is to perform separate water cooling, however, the boiling point of water is 100°C at standard atmospheric pressure, when the cooling water comes into contact with the pre-chamber housing up to hundreds of degrees , the shell of the pre-chamber chamber is suddenly cooled and may be damaged, which greatly reduces the service life of the shell of the pre-chamber chamber; another method is to carry out separate air cooling, but the specific heat capacity of the air is very small, and the When the pre-chamber shell is cooled down, a large amount of cooling air needs to be introduced. A large amount of cooling air will dilute the gas concentration in the pre-chamber cavity, making the flame sprayed out of the pre-chamber cavity smaller and shorter, and the injection force is insufficient, so that it cannot make the The mixture in the combustion chamber cannot be completely combusted

Even the pre-chamber mixture is too lean and the pre-chamber cannot be ignited

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