Injection valve of multi-point injection engine added with mixer

Abstract

The invention discloses an injection valve of a multi-point injection engine added with a mixer. The injection valve comprises a multi-point injection valve body and the mixer; the mixer is fixed at the lower end of the multi-point injection valve body; a mixer annular cavity and a cross injection frame are arranged in the mixer; an inner hole of the multi-point injection valve body communicates with the annular cavity of the mixer; a cross end part of the cross injection frame is fixed on the inner side of the annular cavity of the mixer; multiple first injection holes radially penetrating through the inner side are uniformly distributed on the inner side wall of the annular cavity of the mixer in the peripheral direction; the first injection holes are inclined towards an air intake direction of an intake manifold; the inner hole of the annular cavity of the mixer communicates with inner holes of two cross edges of the cross injection frame; the two cross edges are provided with multiple second injection holes uniformly distributed and penetrating in the directions of the cross edges of vertical holes; and air is firstly mixed with gas injected by the first injection holes once, and then, is mixed with gas injected by the second injection holes, so that the air and the gas are uniformly mixed in the mixer.

Description

technical field [0001] The invention relates to an injection valve of a multi-point injection engine equipped with a mixer, which belongs to the field of gas engines. Background technique [0002] Gas engines generally refer to engines that use natural gas as fuel, and have been widely used in daily social production. According to the way the mixture is formed, gas engines are generally divided into single-point injection engines and multi-point injection engines. The multi-point injection gas engine is a gas engine that injects natural gas with a pressure of 3bar~5bar into the intake manifold, forms a uniform mixture with the inflowing air, and then inhales it into the cylinder to ignite and perform work. Compared with traditional low-pressure gas engines, multi-point injection gas engines have the advantages of fast torque response, low exhaust temperature and reduced risk of gas engine flashback. [0003] Gas engines with multi-point injection, because the high-pressure...

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Problems solved by technology

[0003] Gas engines with multi-point injection, because the high-pressure gas forms a mixture with air in the intake manifold, and the structure of the intake manifold is generally short, there is often not enough space and time for the gas to fully mix with the air, which will cause the gas to enter the cylinder. The mixed gas mixture is unevenly mixed, which leads to poor combustion conditions in the cylinder and lower thermal efficiency; at the same time, due to the dynamic change of gas pressure, the injection accuracy is not enough, resulting in a large change in the concentration of the mixed gas, resulting in poor work done in the cylinder

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