Precombustion chamber system of large-displacement gas internal combustion engine

Abstract

The invention relates to a precombustion chamber system of a large-displacement gas internal combustion engine. The precombustion chamber system comprises a precombustion chamber device which is vertically embedded and arranged in a cylinder cover of the internal combustion engine, wherein the precombustion chamber device comprises a precombustion chamber and an ignition device arranged above the precombustion chamber; the precombustion chamber is of a hollow structure with a top opening and is divided into an ignition area, a precombustion area and a spraying area in sequence from top to bottom, and the spraying area at the bottom part of the precombustion chamber is provided with a spraying nozzle which extends out of the lower end surface of the cylinder cover and is used for spraying a flame; the ignition device comprises a column body arranged on the end surface of the top part of the precombustion chamber and a combustion gathering body arranged in the ignition area of the precombustion chamber; and a spark plug is embedded into the center of the column body, and a gas intake channel and an air intake channel, which extend to the bottom part of the column body, are drilled in the side wall of the column body. The precombustion chamber system has the advantages that the precombustion chamber system is good in processibility, convenient in disassembly and assembly and high in reliability; gas and air are firstly and fully mixed at the ignition area and form stable concentrated and mixed gas around the spark plug, so that the stability and the reliability of ignition in the precombustion chamber are guaranteed.

Description

technical field [0001] The invention relates to the combustion field of a gas internal combustion engine, in particular to a precombustion chamber system of a large displacement gas internal combustion engine. Background technique [0002] Large-displacement gas-fired internal combustion engines generally adopt pre-chamber ignition technology. The pre-chamber supplies a mixture gas close to the standard stoichiometric ratio, which can increase the combustion rate and achieve efficient and clean combustion; and reduce combustion temperature and NOx emissions through exhaust gas recirculation. [0003] However, there are several problems in the practical application of the above technology. One is that it is difficult to form a stable and well-ignited mixture in the pre-combustion chamber, and the ignition is unstable and unreliable. The second is that if the mixture gas close to the standard stoichiometric ratio is directly supplied to the pre-combustion chamber, the structu...

AI Technical Summary

Problems solved by technology

One is that it is not easy to form a stable and well-ignited mixture in the pre-combustion chamber, and the ignition is unstable and unreliable

Second, if the mixture gas close to the standard stoichiometric ratio is directly supplied to the pre-combustion chamber, the structure is complex and there are safety risks such as tempering

The invention of the third patent No. CN201310738497 mentions a pre-chamber system of an internal combustion engine, which is used for an internal combustion engine, especially a pre-chamber system for a gas engine. The ignitable fuel-air mixture is ignitable in the combustion chamber volume, in particular by means of an ignition device which can be arranged on the pre-chamber system, the pre-chamber system is equipped with an overflow channel, the pre-chamber volume Can be connected to the main combustion chamber of the internal combustion engine through this overflow channel, the pre-chamber volume area comprises an ignition area and an overflow area, the overflow area is at least partially separated from the ignition area by an intermediate wall, and in the ignition area the fuel- The air mixture is ignitable, and the overflow channel leads into the overflow area, and an air supply line is provided through which air, preferably compressed air, can be supplied to the overflow area; one of the above-mentioned patents The pre-combustion chamber system of this kind of internal combustion engine has the disadvantages of complex pre-chamber structure and poor reliability when the pre-chamber is in high temperature and high pressure working conditions

Fourth, fuel adaptability is poor. Except for high calorific value fuels such as natural gas, it cannot adapt to combustible gas fuels such as low calorific value and medium calorific value.

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