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egr mixing device and internal combustion engine

A technology of mixing device and mixing tube, which is applied in the direction of charging system, mechanical equipment, engine components, etc., can solve the problems of high pressure loss, complex mixer structure, and difficulty in ensuring mixing uniformity.

Active Publication Date: 2021-01-19
WEICHAI POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] As an independent component, the EGR check valve takes up space, which is not conducive to the layout of the whole machine
At the same time, the pressure resistance of the EGR check valve is relatively large, which is not conducive to the improvement of the EGR rate.
When using a mixer to mix EGR exhaust gas and air, the mixing effect of EGR exhaust gas and fresh air is not good, especially the pipeline arrangement with a short mixing distance, it is difficult to ensure the uniformity of mixing
And the structure of the mixer is complex, the pressure loss is high, and the air intake resistance is large

Method used

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  • egr mixing device and internal combustion engine

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Embodiment Construction

[0029] The invention discloses an EGR mixing device, which optimizes the EGR adjustment structure; the invention also provides an internal combustion engine.

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

[0031] like Figure 1-Figure 7 as shown, figure 1 The pipeline connection schematic diagram of the EGR mixing device provided by the present invention; figure 2 The structural representation of the EGR mixing device provided by the present invention; image 3 for figure 2 Schematic diagram of the ...

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Abstract

The invention provides an EGR mixing device. The device comprises an EGR mixing pipe communicating with an air inlet pipe and a combustion chamber, an EGR mixing cavity is formed in the inlet segmentof the air inlet pipe of the EGR mixing pipe, a waste air inlet communicating with the EGR mixing cavity is formed in the side wall of the EGR mixing pipe, a mixing cavity support is supported and erected in the EGR mixing cavity, an air inlet valve plate for blocking the waste air inlet is supported and erected on the mixing cavity support, the air inlet valve plate comprises a first closing sidepushed by input air in the air inlet pipe to be closed and a second opening side pushed by input air of the waste air inlet to be opened. Fresh air and waste air are mixed in the EGR mixing cavity, the waste air inlet is blocked or opened through the air inlet valve plate on the mixing cavity support, when the waste air inlet is blocked, backflow caused by the fact that air pressure in the air inlet pipe is larger than that of the waste air inlet is avoided, the air inlet structure of an EGR pipeline is simplified, the pressure difference between the fresh air and the waste air is used for blocking the waste air inlet, the pressure resistance of the EGR pipeline is small, and the EGR rate is improved. The invention further provides an internal combustion machine.

Description

technical field [0001] The invention relates to the technical field of internal combustion engines, and more specifically, relates to an EGR mixing device and an internal combustion engine. Background technique [0002] EGR, Exhaust Gas Recirculation, is the abbreviation of exhaust gas recirculation, that is, a certain amount of exhaust gas is drawn from the exhaust pipe, introduced into the intake pipe to mix with fresh air, and then enters the combustion chamber to participate in combustion, so as to reduce the generation of pollutant NOx in the combustion process Quantitative purpose. [0003] Generally, a one-way valve component is installed separately in the EGR pipeline to prevent the backflow of EGR exhaust gas, and a mixer with a complex structure is used to improve the EGR mixing uniformity. [0004] As an independent component, the EGR check valve takes up space, which is not conducive to the layout of the whole machine. At the same time, the pressure resistance ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02M26/19
CPCF02M26/19
Inventor 刘鑫王作峰李志杰曾凡
Owner WEICHAI POWER CO LTD
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