WO2015101030A1 - Egr混合器 - Google Patents

Egr混合器 Download PDF

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Publication number
WO2015101030A1
WO2015101030A1 PCT/CN2014/083109 CN2014083109W WO2015101030A1 WO 2015101030 A1 WO2015101030 A1 WO 2015101030A1 CN 2014083109 W CN2014083109 W CN 2014083109W WO 2015101030 A1 WO2015101030 A1 WO 2015101030A1
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WO
WIPO (PCT)
Prior art keywords
mixing
exhaust gas
gas
nozzle
pipe
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Application number
PCT/CN2014/083109
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English (en)
French (fr)
Inventor
唐克远
张振平
刘文元
陈展
Original Assignee
广西玉柴机器股份有限公司
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Application filed by 广西玉柴机器股份有限公司 filed Critical 广西玉柴机器股份有限公司
Publication of WO2015101030A1 publication Critical patent/WO2015101030A1/zh

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10209—Fluid connections to the air intake system; their arrangement of pipes, valves or the like
    • F02M35/10222—Exhaust gas recirculation [EGR]; Positive crankcase ventilation [PCV]; Additional air admission, lubricant or fuel vapour admission
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/17—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the intake system
    • F02M26/19—Means for improving the mixing of air and recirculated exhaust gases, e.g. venturis or multiple openings to the intake system

Definitions

  • the present invention relates to the field of engines, and more particularly to an EGR mixer. Background technique
  • Exhaust Gas Recirculation is a technique for returning a small portion of the exhaust gas generated by the engine to the cylinder for re-combustion. Specifically, the exhaust gas discharged from the engine is mixed with fresh air in the EGR mixer and then enters the cylinder. .
  • the EGR mixer is mainly used in two forms.
  • the first one is to connect the exhaust pipe to the intake pipe, and the exhaust gas in the exhaust pipe is directly mixed with the air in the intake pipe; the second is in the first type.
  • the length of the fresh air and exhaust gas mixing pipeline is increased to improve the mixing uniformity.
  • the mixing effect of the first technical solution described above is poor, and the mixing effect is not satisfactory.
  • the second method can improve the mixing uniformity, but the lengthening of the pipeline affects the layout of the whole machine and reduces the reliability of the parts. .
  • the flow direction of the exhaust gas is at an angle to the fresh air flow direction, so that it is difficult to mix the exhaust gas and the fresh air well, which affects the uniformity of the EGR rate of each cylinder of the engine, thereby affecting the performance of the engine.
  • the present invention is directed to overcoming the above-mentioned deficiencies in the prior art, and provides an EGR mixer which allows exhaust gas to be mixed with fresh air to improve the EGR rate of each cylinder of the engine and improve the performance of the engine.
  • an EGR mixer comprising: an intake manifold comprising a fresh air intake end and a gas mixing section, the side wall of the gas mixing section being provided with an exhaust gas intake interface; a mixing nozzle; Nested in the gas mixing section, the outer wall of the mixing nozzle and the inner wall of the gas mixing section enclose an annular cavity; and a mixing pipe member disposed at an intermediate portion of the mixing pipe and having both ends of the pipe member penetrating the pipe wall of the mixing pipe, the mixing pipe fitting The surface is provided with a through hole through which the exhaust gas flows, and the mixing pipe member serves as a passage for the exhaust gas in the annular cavity to enter the mixing pipe.
  • the mixing nozzle is a venturi nozzle, and the mixing tube is located at the throat of the venturi nozzle and is located at the axial position of the venturi nozzle.
  • the mixing pipe member is oblate, the through hole is disposed on the upper and lower oblate faces, and the through hole direction is perpendicular to the fresh air intake direction.
  • the through holes are arranged in an array form.
  • the through hole has a diameter of 3-5 mm.
  • the invention has the following beneficial effects: By designing the mixing pipe fittings, the exhaust gas is dispersed into the fresh air through the array through holes for mixing, increasing the contact area of the exhaust gas with the fresh air, so that the exhaust gas is thoroughly mixed in the mixing nozzle Improve the EGR rate uniformity of each cylinder of the engine and improve engine performance.
  • Figure 1 is a schematic view showing the structure of an EGR mixer of the present invention.
  • FIG. 2 is a schematic view showing the structure of a mixing nozzle and a mixing pipe in the present invention.
  • the EGR mixer of the present invention mainly mixes exhaust gas with fresh air to achieve a more uniform mixing effect, thereby achieving a better mixing effect, but shortening the length of the mixing line of the original mixer and improving the reliability of the parts.
  • the EGR mixer provided in this embodiment includes an intake nozzle 1 and a mixing nozzle. 2 and a mixing pipe member 3, wherein the inlet pipe 1 has a fresh air inlet port 11 and a gas mixing portion 12, and the fresh air inlet port 11 and the gas mixing portion 12 are connected by bolts (not shown).
  • An exhaust gas intake port 121 is provided on the side wall of the gas mixing section 12.
  • the mixing nozzle 2 is sleeved in the gas mixing section 12, specifically, the mounting position of the snap-in mixing nozzle 2 (not shown) is provided inside the gas mixing section 12, and when the mixing nozzle 2 is set, the fresh air is unscrewed.
  • the gas end 11 abuts one end of the mixing nozzle 2 at the mounting position, and then mounts the fresh air inlet end 1 1 and clamps the other end of the mixing nozzle 2 on the outer wall of the mixing nozzle 2 and the inner wall of the gas mixing section 12 Enclosed into an annular cavity 21.
  • the mixing pipe member 3 is disposed at an intermediate portion of the mixing nozzle 2 and both ends of the pipe member extend through the pipe wall of the mixing nozzle 2, and the mixing pipe member 3 serves as a passage for the exhaust gas in the annular cavity to enter the mixing nozzle 2, specifically, in the mixing pipe member 3 A through hole 31 is provided in the surface, and the exhaust gas in the annular cavity enters the mixing nozzle 2 through the through hole 31.
  • the air entering from the fresh air intake port 11 and the exhaust gas entering from the exhaust gas intake port 121 are thoroughly mixed by the mixing nozzle 2 and then enter the combustion chamber through the mixed gas inlet end 122 of the gas mixing section 12.
  • the mixing nozzle 2 is a venturi nozzle
  • the mixing tube member 3 is oblate
  • the mixing tube member 3 is disposed at the venturi nozzle throat at the axial position of the venturi nozzle, the mixing tube member 3
  • the opening is opposite to the exhaust gas inlet port 121, and the through hole 31 is arranged in an array on the upper and lower oblate faces.
  • the diameter of the through hole is 3-5 mm, and the direction of the through hole 31 is perpendicular to the fresh air intake direction.
  • the exhaust gas of the engine After the exhaust gas of the engine enters the gas mixing section 12 through the exhaust gas inlet port 121, a part of the exhaust gas directly enters the mixing pipe member 3 from the open end of the mixing pipe member 3 under the pressure of the exhaust gas, and part of the exhaust gas flows through the annular cavity 21 to The open end of the other end of the mixing pipe member 3, such that the exhaust gas entering the exhaust gas inlet port 121 can enter the mixing pipe member 3 from both open ends of the mixing pipe member 3 (see the exhaust gas flow direction arrow in Fig. 2), in the exhaust gas pressure and the Venturi effect. Under the action, the exhaust gas flows into the inner cavity of the mixing nozzle 2 (venturi nozzle) through the through hole 31 provided on the oblate surface, and is mixed with the fresh air passing through the fresh air intake end 11.
  • the mixing tube 3 Since the mixing tube 3 is placed on the axis of the venturi, the exhaust gas can pass through the mixing tube
  • the upper and lower through holes 31 of the 3 are directly mixed into the fresh air inside the venturi nozzle to be mixed,
  • the upper and lower oblate faces of the mixing pipe member 3 increase the contact area of the exhaust gas with the fresh air, and the flow direction of the exhaust gas is perpendicular to the flow direction of the fresh air, so that the exhaust gas is more uniformly mixed with the fresh air.
  • the exhaust gas passing through the through hole 31 can be further mixed with the mixed gas which has been formed in the upper and lower regions of the mixing pipe member 3, thereby achieving a desired mixing effect.
  • the mixing tube 3 By designing the mixing tube 3, the exhaust gas is dispersed into the fresh air through the array through-hole 31 to be mixed, and the contact area between the exhaust gas and the fresh air is increased, so that the exhaust gas is thoroughly mixed in the mixing nozzle 2, and the EGR rate of each cylinder of the engine is improved. Hook, improve engine performance.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust-Gas Circulating Devices (AREA)

Abstract

一种EGR混合器，包括：进气接管（1），其包括新鲜空气进气端（11）及气体混合段（12），气体混合段（12）的侧壁上设有废气进气接口（121）；混合接管（2），其套在气体混合段（12）内，混合接管（2）的外壁与气体混合段（12）的内壁围成环形空腔（21）；以及混合管件（3），其设在混合接管（2）的中间部位且该管件的两端贯穿混合接管（2）的管壁，混合管件（3）的表面上设有供废气流过的通孔（31），混合管件（3）用作环形空腔（21）内的废气进入混合接管（2）内的通道。该混合器能够提高发动机各缸的EGR率均匀性和发动机性能。

Description

EGR混合器 技术领域
本发明涉及发动机领域， 特别涉及一种 EGR混合器。 背景技术
废气再循环系统 (Exhaust Gas Recirculation)简称 EGR, 是将发动机产 生的废气的一小部分再送回气缸再度燃烧的技术， 具体地， 将发动机排出 的废气与新鲜空气在 EGR混合器中混合后进入气缸。
目前， EGR混合器主要釆用两种形式， 第一种是将排气管接入进气接 管处， 排气管内的废气与进气管内的空气直接混合； 第二种是在第一种的 基础上将混合后管路延长， 增长新鲜空气与废气混合管路长度来提高混合 均匀性。
但是， 上述第一种技术方案的混合效果较差， 达不到较为理想的混合 效果， 第二种虽然可以提高混合均勾性， 但是管路加长， 影响整机布置， 而且降低零件的可靠性。 另外， 上述技术方案中， 废气流动方向与新鲜空 气流动方向成一定角度， 致使废气与新鲜空气难以较好混合， 影响发动机 各缸的 EGR率均匀性， 进而影响发动机的性能。 发明内容
本发明是为了克服上述现有技术中缺陷， 提供了一种 EGR混合器， 使得废气与新鲜空气均勾混合， 提高发动机各缸的 EGR率均勾性， 提高 发动机的性能。
为实现上述目的， 本发明提供一种 EGR混合器， 包括： 进气接管， 其包括新鲜空气进气端及气体混合段， 气体混合段的侧壁上设有废气进气 接口； 混合接管， 其套在气体混合段内， 混合接管的外壁与气体混合段的 内壁围成环形空腔； 以及混合管件， 其设在混合接管的中间部位且该管件 的两端贯穿混合接管的管壁， 混合管件的表面上设有供废气流过的通孔， 混合管件用作环形空腔内的废气进入混合接管内的通道。
上述技术方案中， 混合接管为文丘里接管， 混合管件设在文丘里接管 的喉口处且位于文丘里接管的轴线位置上。 上述技术方案中， 混合管件为扁圓形， 通孔设在上下扁圓面上， 通孔 方向与新鲜空气进气方向垂直。
上述技术方案中， 通孔为阵列形式排列。
上述技术方案中， 通孔的直径为 3-5mm。
与现有技术相比， 本发明具有如下有益效果： 通过设计混合管件， 废 气经过列阵通孔分散进入新鲜空气内部进行混和， 增大废气与新鲜空气接 触面积， 使得废气在混合接管内充分混合， 提高发动机各缸的 EGR率均 匀性， 提高发动机性能。 附图说明
图 1是本发明的 EGR混合器结构示意图。
图 2是本发明中混合接管与混合管件结构示意图。
结合附图在其上标记以下附图标记：
1-进气接管；
11-新鲜空气进气端；
12-气体混合段；
121-废气进气接口；
122-混合气体进口端；
2-混合接管；
3-混合管件；
31-通孔。 具体实施方式
下面结合附图， 对本发明的一个具体实施方式进行详细描述， 但应当 理解本发明的保护范围并不受具体实施方式的限制。
本发明的 EGR混合器主要是使废气与新鲜空气混合更加均勾， 从而 达到较为理想的混合效果， 但是缩短了原来混合器的混合管路长度， 提高 零件的可靠性。
如图 1所示， 本实施例提供的 EGR混合器包括进气接管 1、 混合接管 2及混合管件 3 , 其中， 进气接管 1具有新鲜空气进气端 11及气体混合段 12 , 新鲜空气进气端 11与气体混合段 12通过螺栓 (图中未示出）连接在 一起， 在气体混合段 12的侧壁上设有废气进气接口 121。 混合接管 2套在 气体混合段 12内， 具体地， 在气体混合段 12的内侧设有卡接混合接管 2 的安装位（图中未标记），在套装混合接管 2时，拧下新鲜空气进气端 11 , 把混合接管 2的一端抵接在安装位上， 然后装上新鲜空气进气端 1 1并卡 紧混合接管 2的另一端， 在混合接管 2的外壁与气体混合段 12的内壁围 成环形空腔 21。混合管件 3设在混合接管 2中间部位且该管件的两端贯穿 混合接管 2的管壁， 混合管件 3用作环形空腔内的废气进入混合接管 2内 的通道， 具体地， 在混合管件 3的表面上设有通孔 31 , 环形空腔内的废气 经过通孔 31进入混合接管 2内。 从新鲜空气进气端 11进入的空气与从废 气进气接口 121进入的废气在混合接管 2充分混合后经过气体混合段 12 的混合气体进口端 122进入燃烧室。
如图 2所示， 作为优选方案， 混合接管 2为文丘里接管， 混合管件 3 为扁圓形， 混合管件 3设在文丘里接管喉口处且位于文丘里接管的轴线位 置上， 混合管件 3的开口正对废气进气接口 121 , 通孔 31为阵列形式设在 上下扁圓面上， 通孔的直径为 3-5mm, 通孔 31 的方向与新鲜空气进气方 向垂直。 当发动机的废气通过废气进气接口 121进入气体混合段 12内后， 在废气压力作用下， 一部分废气直接从混合管件 3的一端开口端进入混合 管件 3 , —部分废气通过环形空腔 21流至混合管件 3的另一端开口端， 这 样， 进入废气进气接口 121的废气可以从混合管件 3的两开口端（参见图 2中废气流向箭头） 进入混合管件 3 内， 在废气压力以及文丘里效应作用 下， 废气通过设在扁圓面上的通孔 31流入混合接管 2 (文丘里接管 )的内 腔， 与通过新鲜空气进气端 11的新鲜空气进行混合。
由于混合管件 3设置于文丘里接管的轴线上， 废气可以通过混合管件
3的上下通孔 31直接混入到处于文丘里接管内部的新鲜空气进行混合，同 时， 混合管件 3的上下扁圓面增大废气与新鲜空气的接触面积， 且废气流 动方向与新鲜空气流动方向垂直， 使得废气与新鲜空气混合更加均勾。 另 外， 经过通孔 31 的废气还可以与混合管件 3上下区域已经形成的混合气 体进行进一步混合， 从而达到较为理想的混合效果。
这种通过设计混合管件 3 ,废气经过列阵通孔 31分散进入新鲜空气内 部进行混和， 增大废气与新鲜空气接触面积， 使得废气在混合接管 2内充 分混合， 提高发动机各缸的 EGR率均勾性， 提高发动机性能。
以上公开的仅为本发明的具体实施例， 但是， 本发明并非局限于此， 任何本领域的技术人员能思之的变化都应落入本发明的保护范围。

Claims

权 利 要 求 书
1. 一种 EGR混合器， 其特征在于， 包括：
进气接管， 其包括新鲜空气进气端及气体混合段， 所述气体混合段的 侧壁上设有废气进气接口；
混合接管， 其套在所述气体混合段内， 所述混合接管的外壁与所述气 体混合段的内壁围成环形空腔； 以及
混合管件， 其设在所述混合接管的中间部位且该管件的两端贯穿所述 混合接管的管壁， 所述混合管件的表面上设有供废气流过的通孔， 所述混 合管件用作环形空腔内的废气进入所述混合接管内的通道。
2. 根据权利要求 1所述的 EGR混合器， 其特征在于， 所述混合接管 为文丘里接管， 所述混合管件设在所述文丘里接管的喉口处且位于所述文 丘里接管的轴线位置上。
3. 根据权利要求 1所述的 EGR混合器， 其特征在于， 所述混合管件 为扁圓形， 所述通孔设在上下扁圓面上， 所述通孔方向与新鲜空气进气方 向垂直。
4. 根据权利要求 3所述的 EGR混合器， 其特征在于， 所述通孔为阵 列形式排列。
5. 根据权利要求 1至 4任一所述的 EGR混合器， 其特征在于， 所述 通孑 L的直径为 3-5mm。
PCT/CN2014/083109 2013-12-31 2014-07-28 Egr混合器 WO2015101030A1 (zh)

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CN114060184A (zh) * 2020-07-31 2022-02-18 比亚迪股份有限公司 一种水气混合装置及发动机
DE102022130345A1 (de) 2022-11-16 2024-05-16 Innio Jenbacher Gmbh & Co Og Gasmischvorrichtung für Abgasrückführsysteme von Verbrennungsmotoren

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CN103742302A (zh) * 2013-12-31 2014-04-23 广西玉柴机器股份有限公司 Egr混合器
CN104879227B (zh) * 2015-05-29 2017-07-28 潍柴动力股份有限公司 柴油机egr控制系统以及控制方法
CN105114160B (zh) * 2015-07-29 2017-11-17 安徽江淮汽车集团股份有限公司 催化转化装置及其废气空气混合器
CN105003361A (zh) * 2015-08-10 2015-10-28 广西玉柴机器股份有限公司 集成egr混合器
KR101816364B1 (ko) * 2015-12-09 2018-01-08 현대자동차주식회사 스로틀밸브 결빙방지 장치, 이를 포함하는 스로틀밸브 결빙방지용 egr 시스템 및 그 작동방법
US10767659B2 (en) * 2018-12-12 2020-09-08 Volvo Car Corporation Exhaust gas recirculation compressor inlet thermal separation system
US11859544B1 (en) * 2022-06-16 2024-01-02 Solar Turbines Incorporated Turbine exhaust gas recirculation mixer box

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