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Injection mechanism

A technology of injection mechanism and injection port, which is applied in fuel injection devices, mechanical equipment, engine components, etc., can solve the problems of affecting the exhaust gas treatment effect, lengthening the exhaust pipe time, increasing product cost, etc., and achieves excellent atomization performance and structure Conciseness and the effect of shortening the stroke

Pending Publication Date: 2022-08-02
广西博盛迪科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, an additional injection valve needs to be installed at the front end of the metering valve, which not only increases the product cost, but also lengthens the injection formation, resulting in a longer injection time to the exhaust pipe, reducing the response speed, and ultimately affecting the exhaust gas treatment effect
Moreover, in this multi-stage injection mechanism, fluids such as gas and urea mainly take away the heat in the flow channel, but part of the heat is transferred to the metering valve through the shell or wall, causing the metering valve to withstand high temperatures, which is prone to crystallization

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0116] like Figures 1 to 4 As shown, it is the first embodiment of the injection mechanism including the atomization structure, and the injector can be used in the fuel injection system of the engine and the SCR injection system of the exhaust gas after-treatment of the exhaust pipe. When used in the fuel injection system, the fuel injected by the injector has excellent atomization performance, which can improve the fuel combustion efficiency of the combustion chamber and improve the fuel economy; It can improve the reaction speed of urea solution injection, reduce the emission of unreacted urea, and improve the conversion efficiency of the catalyst.

[0117] Specific implementation structure: the valve 11, the valve 11 is installed on the valve sleeve 15, the valve 11 is provided with a valve hole, the valve hole is matched with a valve ball 16, the valve ball 16 and the control module (such as an electromagnetic control module, a coil control module) that controls its openi...

Embodiment 2

[0121] like figure 2 , Figure 5 , Image 6 and Figure 7 As shown, it is the second embodiment of the injection mechanism including the atomization structure, the atomization structure can be used in the fuel injection system of the engine and the SCR injection system of the exhaust gas after-treatment, so that the injector has excellent mist The injector is used in the fuel injection system, which can improve the fuel combustion efficiency of the combustion chamber and improve the fuel economy; in the exhaust pipe exhaust after-treatment SCR system, it can reduce the emission of unreacted urea and improve the conversion efficiency of the catalyst.

[0122] The main difference between the second embodiment and the first embodiment is that the design of the orifice of the shunt module is different.

[0123] Specific implementation structure: the valve 11, the valve 11 is installed on the valve sleeve 15, the valve 11 is provided with a valve hole, the valve hole is matched...

Embodiment 3

[0130] like Figure 8 , Figure 9 and Figure 10 As shown, it is the third embodiment of the injection mechanism including the atomization structure. The atomization structure can be used in the fuel injection system of the engine and the SCR injection system of the exhaust gas after-treatment, so that the injector has excellent mist In the fuel injection system, it can improve the fuel combustion efficiency of the combustion chamber and improve the fuel economy; in the exhaust pipe exhaust after-treatment SCR system, it can reduce the emission of unreacted urea and improve the conversion efficiency of the catalyst.

[0131] The main structure of this embodiment: the valve seat 33 of the metering valve is installed in the inner installation sleeve 31, the steel ball 32 is fitted with the inclined surface 3301 of the valve seat 33, and the control part of the metering valve When the steel ball 32 is lifted, the liquid flows from the steel ball 32. The ball 32 flows through th...

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Abstract

The invention discloses a spraying mechanism which comprises a metering valve and an atomization structure, the atomization structure is provided with a mixing cavity, and the mixing cavity is provided with a liquid channel for directly or indirectly spraying metering fluid into the mixing cavity, a gas channel for inputting gas flow into the mixing cavity and a spraying opening communicated with the mixing cavity. The metering valve is communicated with the liquid channel to supply metering fluid; the gas channel comprises a coiling section which is spirally coiled along the outer part of the metering valve and extends beyond the injection direction; the gradually-shrinking spiral section is coiled along the end face of the injection end of the metering valve, and the radius of the gradually-shrinking spiral section is gradually reduced; the coiled section is communicated with the gradually-shrunk spiral section, the gradually-shrunk spiral section is connected into the mixing cavity in a mode of being tangent to the inner wall of the mixing cavity, gas is input into the coiled section, enters the gradually-shrunk spiral section after being spirally coiled along the outer portion of the metering valve and then enters the mixing cavity, and fluid heat dissipation covers are formed on the outer portion of the metering valve and the end face of the injection end of the metering valve. High-temperature protection of the metering valve can be improved, and the risk of urea crystallization is reduced.

Description

technical field [0001] The present invention relates to the technical field of injection components, and more particularly, to an injection mechanism for an engine or an exhaust gas treatment system. Background technique [0002] The previous application number is 202120886727X Chinese patent discloses a multi-stage injection mechanism, which is designed to include a metering valve and an injection valve. The multi-stage injection mechanism accurately measures the urea, mixes it with gas, and then sprays it at high speed to achieve accurate metering and high-efficiency mist. effect of . However, an injection valve needs to be installed at the front end of the metering valve, which not only increases the cost of the product, but also prolongs the injection formation, which leads to a longer injection time to the exhaust pipe, reduces the response speed, and ultimately affects the exhaust gas treatment effect. Moreover, in the multi-stage injection mechanism, fluids such as g...

Claims

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Application Information

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IPC IPC(8): F01N3/20F01N13/14F02M67/12F02M53/04
CPCF01N3/2066F01N13/14F02M67/12F02M53/046F01N2610/08F01N2610/1453F01N2610/1486F01N2610/02Y02T10/12
Inventor 王泽
Owner 广西博盛迪科技有限公司