CN108350786A - 用于将流体计量到排气管路中的喷射器组件 - Google Patents

用于将流体计量到排气管路中的喷射器组件 Download PDF

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CN108350786A
CN108350786A CN201680064676.4A CN201680064676A CN108350786A CN 108350786 A CN108350786 A CN 108350786A CN 201680064676 A CN201680064676 A CN 201680064676A CN 108350786 A CN108350786 A CN 108350786A
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shell
injector
opening
electric connection
received block
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F·特梅斯
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Robert Bosch GmbH
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2066Selective catalytic reduction [SCR]
    • F01N3/208Control of selective catalytic reduction [SCR], e.g. dosing of reducing agent
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2066Selective catalytic reduction [SCR]
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00Adding substances to exhaust gases
    • F01N2610/02Adding substances to exhaust gases the substance being ammonia or urea
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00Adding substances to exhaust gases
    • F01N2610/03Adding substances to exhaust gases the substance being hydrocarbons, e.g. engine fuel
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00Adding substances to exhaust gases
    • F01N2610/11Adding substances to exhaust gases the substance or part of the dosing system being cooled
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00Adding substances to exhaust gases
    • F01N2610/14Arrangements for the supply of substances, e.g. conduits
    • F01N2610/1453Sprayers or atomisers; Arrangement thereof in the exhaust apparatus
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00Adding substances to exhaust gases
    • F01N2610/14Arrangements for the supply of substances, e.g. conduits
    • F01N2610/1453Sprayers or atomisers; Arrangement thereof in the exhaust apparatus
    • F01N2610/146Control thereof, e.g. control of injectors or injection valves
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/10Internal combustion engine [ICE] based vehicles
    • Y02T10/12Improving ICE efficiencies

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

本发明涉及一种用于将流体、特别是还原剂计量到内燃机的排气管路(9)中的喷射器组件,包括:喷射器(2);围绕喷射器(2)的壳体(3);设置在壳体(3)上的第一开口(5),以便允许用于将流体供应给喷射器(2)的流体接头(4)进入;设置在壳体(3)上的第二开口(6);以及布置在壳体(3)中的电接头组件(7),该电接头组件从喷射器的电接头(20)引至所述第二开口(6),其中,所述电接头组件(7)包括导线区段(70)和插头接收座(71),并且,所述插头接收座(71)以密封的方式布置在所述壳体(3)中的第二开口(6)上。

Description

用于将流体计量到排气管路中的喷射器组件
技术领域
本发明涉及一种用于将流体、特别是还原剂计量到内燃机排气管路中的喷射器组件以及一种具有根据本发明的喷射器组件的内燃机。
背景技术
为了减少内燃机的废气排放,将还原剂例如尿素喷入内燃机的排气管路中。这通过喷射器来进行。由于在排气系统中通常会有非常高的温度,所以对这种尿素喷射器的要求越来越高。这种喷射器例如由DE 10 2013 205 309 A1已知。为了降低喷射器的温度,在这里设置了围绕喷射器引导的冷却回路。喷射器的电接头通过弹性体制成的插口穿过壳体。但是,对于这种尿素喷射器,可能由于高反应性蒸气例如氨的出现而出现另外的问题,氨可能出现在排气系统或供应管线中并且特别是侵蚀弹性体和塑料。这种蒸气可以显著缩短喷射器组件的使用寿命。
发明内容
具有权利要求1的特征的用于将流体、特别是还原剂计量到内燃机的排气管路中的本发明喷射器组件具有以下优点:喷射器组件的高温和可能逸出的高反应性蒸气不会造成损坏。根据本发明,这是由此实现的:喷射器具有分开的、布置在喷射器的壳体中的电接头组件,其从喷射器的电接头引到从喷射器的壳体出来的出口。电接头组件包括导线区段和插头接收座,插头接收座以密封的方式布置在设置于壳体上的开口中。因此,根据本发明,电接头组件可针对可能出现的侵蚀性蒸气进行优化,特别是不使用塑料和/或弹性体或其他可能受该蒸气侵蚀的材料。特别优选的是由金属材料制成的插头接收座并且导线区段在壳体中的绝缘通过耐蒸气和耐喷射水的塑料来实施。此外,通过本发明的解决方案也可以省去现有技术中至今要引入壳体中并且必须单独连接到电接头上的电缆尾部的费事的安装。也可以省去用于在壳体的开口处密封电缆的插口。然后可以简单地通过将插头插入插头接收座来实现喷射器的电连接。由此,插头接收座被附加地固定和引导并且即使在例如出现振动或摇动运动和高热负荷时也不会松脱。因此,插头和插头接收座之间的接触不再位于壳体内部,而是位于壳体边缘处或者说壳体外部。因此,触点不会暴露于可能在壳体中出现的易反应的蒸气中。
从属权利要求显示了本发明的优选扩展。
优选,喷射器组件的壳体包括主体和盖。在此,在盖中优选设置电接头组件的开口。进一步优选,在盖中也设置用于将流体供应给喷射器的流体接头的开口。
特别优选,壳体在电接头组件的开口处具有套筒状颈部。特别地,电接头组件的插头接收座在套筒状颈部上借助O形环密封。由此,插头接收座在壳体中的组装被简化,因为套筒状颈部提供了插头接收座引导部。此外能够以简单的方式,例如借助O形圈,实现安全的密封。
优选,插头接收座至少部分地插入到壳体的套筒状颈部中。进一步优选,插头接收座完全插入套筒状颈部中。
替换地优选,在用于电接头组件的开口中布置套筒。
进一步优选,电接头组件包括保持装置,例如夹子,其将电接头组件的导线区段固定在壳体内部。导线区段的固定优选在喷射器组件的流体接头处进行。保持装置特别优选为夹子,特别是由金属材料制成。由此确保快速和简单的安装。
为了电绝缘,电接头组件的导线区段优选借助耐腐蚀的塑料包封。该塑料特别是耐氨的。
根据本发明的优选实施方式,电接头组件的插头接收座通过卷边压接来连接在壳体上。由此可以以简单且成本低廉的方式实现插头接收座和壳体之间的安全且特别是流体密封的密封。替换地,插头接收座通过夹子固定在壳体上。
为了可靠的电接触,导线区段优选通过焊接连接固定在喷射器的电接头上。
本发明还涉及一种内燃机,其包括布置在内燃机排气管路上的根据本发明的喷射器组件。该喷射器组件尤其是用于喷射还原剂、尤其是尿素水溶液的组件。
附图说明
在下文中参考附图详细描述本发明的优选实施例。在图中示出:
图1根据本发明实施例的喷射器的示意性剖面图,
图2图1的喷射器组件的一部分的示意性横剖面图。
具体实施方式
在下文中参照图1和图2详细描述根据本发明的优选实施例的喷射器组件1。
如从图1中可以看到的那样,喷射器组件1包括布置在壳体3中的喷射器2。喷射器2设置成用于将流体、特别是还原剂计量到内燃机的排气管路9中。喷射器2优选是用于计量尿素-水混合物的尿素喷射器。
壳体3由金属材料例如不锈钢制成,并且在该实施例中设置成两部分式。在这种情况下,壳体3包括基本罐形的主体30和封闭该罐形主体30的盖31。在壳体3中还布置有内壳体32,用于支撑喷射器2并且提供引导冷却剂经过喷射器旁边的可能性。
盖31由与主体30相同的材料制成并且通过焊接连接34固定在主体30上。
在盖31中设有第一开口5和第二开口6。第一开口5用于引导流体接头4穿过盖31,以将待喷射的流体供应给喷射器2。流体接头4在此沿喷射器2的轴向方向X-X定向并且例如经由与盖的焊接连接而与喷射器连接。
喷射器组件1还包括电接头组件7。电接头组件7用于将喷射器与引向未示出的控制器的导线10连接。电接头组件7在此完全布置在壳体3中。电接头组件7包括导线区段70和插头接收座71。导线区段70的自由端借助焊接连接73固定在喷射器2的电接头20上。在该实施例中,两个导线区段70(参见图2)引向喷射器2。
为了稳定和引导,导线区段70借助塑料夹形式的保持装置8固定在流体接头4上。这可以从图2中详细看出。
如从图1看出的那样,插头接收座71部分地布置在形成在盖31上的套筒状颈部33中。在此,插头接收座71具有突缘,该突缘弯曲并通过卷边压接72固定在套筒形状颈部33上。由此可以实现插头接收座71在盖31上的简单和可靠的固定。此外,在插头接收座71的外周上还设置有O形环12,以便能够实现壳体内部相对于壳体3外侧的冗余密封。
因此,根据本发明,可以首先将电接头组件7容易且无问题地固定在喷射器2上,在将包括电接头组件7的喷射器安装在壳体3中并且插头接收座71固定在盖31上之后,将导线10的插头11简单地插入到插头接收座71中。由于导线区段70和电接头20之间的连接可以在壳体3的外部实现,所以可以实现焊接连接73的制造的自动化。此外,不必像现有技术中那样在导线10穿过壳体之处设置插口或类似物。在壳体和壳体外侧之间的过渡处,根据本发明设置了插头接收座71。在插头插入到插头接收座71中的状态下,还能够附加地实现插头接收座在壳体3上的固定,使得即使在摇动负载或高热负载的情况下插头接收座71也不能从壳体脱离。
替代楔紧,也可以使用固定夹用于固定插头11。

Claims (10)

1.用于将流体、特别是还原剂计量到内燃机的排气管路(9)中的喷射器组件,包括:
-喷射器(2),
-围绕喷射器(2)的壳体(3),
-设置在壳体(3)上的第一开口(5),以便允许用于将流体供应给喷射器(2)的流体接头(4)进入,
-设置在壳体(3)上的第二开口(6),以及
-布置在壳体(3)中的电接头组件(7),该电接头组件从喷射器的电接头(20)引至所述第二开口(6),
-其中,所述电接头组件(7)包括导线区段(70)和插头接收座(71),并且,
-所述插头接收座(71)以密封的方式布置在所述壳体(3)中的第二开口(6)上。
2.根据权利要求1所述的组件,其特征在于,所述壳体(3)包括主体(30)和盖(31)。
3.根据权利要求2所述的组件,其特征在于,所述第二开口(6)设置在所述壳体(3)的所述盖(31)中。
4.根据前述权利要求中任一项所述的组件,其特征在于,所述壳体(3)在所述第二开口(6)处具有套筒状颈部(33)。
5.根据权利要求4所述的组件,其特征在于,所述插头接收座(71)至少部分地插入到所述套筒状颈部(33)中。
6.根据权利要求1至3中任一项所述的组件,其特征在于,在所述第二开口(6)上设置有套筒,所述插头接收座(71)完全布置在所述套筒中。
7.根据前述权利要求中任一项所述的组件,还包括保持装置(8),所述保持装置使所述导线区段(70)在所述壳体的内部固定。
8.根据前述权利要求中任一项所述的组件,其特征在于,所述导线区段(70)借助耐腐蚀的塑料来绝缘或者借助绝缘套筒来绝缘。
9.根据前述权利要求中任一项所述的组件,其特征在于,插头接收座(71)借助卷边压接(72)连接在所述壳体(3)上。
10.内燃机,包括根据前述权利要求中任一项所述的喷射器组件(1),所述喷射器组件布置在所述内燃机的排气管路(9)上。
CN201680064676.4A 2015-11-04 2016-09-19 用于将流体计量到排气管路中的喷射器组件 Pending CN108350786A (zh)

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DE102015221620.9A DE102015221620A1 (de) 2015-11-04 2015-11-04 Injektoranordnung zum Zumessen eines Fluids in einen Abgasstrang
DE102015221620.9 2015-11-04
PCT/EP2016/072185 WO2017076543A1 (de) 2015-11-04 2016-09-19 Injektoranordnung zum zumessen eines fluids in einen abgasstrang

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US20180320573A1 (en) 2018-11-08
WO2017076543A1 (de) 2017-05-11
DE102015221620A1 (de) 2017-05-04
EP3371425A1 (de) 2018-09-12
EP3371425B1 (de) 2019-07-10
KR20180078294A (ko) 2018-07-09

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