CN1144552A - 给内燃发动机吸入空气供应蒸汽的方法及装置 - Google Patents
给内燃发动机吸入空气供应蒸汽的方法及装置 Download PDFInfo
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- 238000002485 combustion reaction Methods 0.000 title abstract description 4
- 239000007788 liquid Substances 0.000 claims abstract description 22
- 238000009736 wetting Methods 0.000 claims description 18
- 239000002360 explosive Substances 0.000 claims description 8
- 239000000498 cooling water Substances 0.000 claims description 6
- 239000003595 mist Substances 0.000 claims description 6
- 230000006835 compression Effects 0.000 claims description 5
- 238000007906 compression Methods 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 31
- 238000009834 vaporization Methods 0.000 description 7
- 230000008016 vaporization Effects 0.000 description 7
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical compound [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 4
- 239000000446 fuel Substances 0.000 description 4
- 239000007789 gas Substances 0.000 description 2
- 239000008246 gaseous mixture Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000001272 nitrous oxide Substances 0.000 description 2
- 239000008400 supply water Substances 0.000 description 2
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- 238000005516 engineering process Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
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- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B47/00—Methods of operating engines involving adding non-fuel substances or anti-knock agents to combustion air, fuel, or fuel-air mixtures of engines
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- F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
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- F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
- F02M25/022—Adding fuel and water emulsion, water or steam
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Abstract
本发明涉及一种给吸入空气供应蒸汽的方法,所述吸入空气被供往一台内燃发动机(1)。该方法包括多个步骤:压缩被供应蒸汽之前的吸入空气,以及使吸入空气与液体在润湿装置(8)中接触,所用方法是:将经过压缩的吸入空气与液体同步送入润湿装置(8)并使它们以相反方向流过润湿装置(8)。本发明还涉及一种给内燃发动机(1)的吸入空气供给蒸汽的装置,在该装置中连结着一台用来压缩吸入空气的压缩机。该装置包括一台连接在压缩机(6)和发动机(1)之间的润湿装置(8)。所述的润湿装置具有一个用来将水送入润湿装置(8)的第一连接件以及一个用来将吸入空气送入润湿装置(8)的第二连接件,润湿装置(8)适于给吸入空气供应水蒸汽,所用的方法是:使吸入空气与水在通过润湿装置反向流动的同时相互接触。
Description
本发明涉及一种给内燃发动机吸入空气供应蒸汽的方法,以及实现该方法的装置。
给发动机的吸入空气供应水蒸气,其原理是众所周知的。它首先被用于所谓的涡轮增压内燃发动机之中。最重要的是,这样的湿润空气能导致一氧化氮析出的减少。这对于用过量空气工作因而不能给它提供三用催化剂的发动机来说具有特殊的重要性。同样,给酒精动力发动机供应汽化燃料也是众所周知的。
在专利说明书US-4,632,067中披露了一种装置,它用来把水蒸气供应到发动机的吸入空气之中。在这种装置中就象在同样适用的其它已知装置中一样,水蒸气是用一个加热元件直接加热水而生成的,随后水蒸气与被供应到发动机的空气混合。这种蒸发水的技术需要相当大量的高等级能量。由于必须给每升空气供应平衡数量的水蒸气以便获得最佳结果,而吸入空气流常常在短时间内产生强烈变化,被供应水蒸气(或一些其它蒸汽)的数量调节是困难的。
本发明的一个基本目的是:提供一种给吸入空气供应蒸汽的方法以及一种用来实现该方法的装置,它能消除现有技术的上述缺点,并显著降低内燃发动机的一氧化氮析出水平,同时还增加燃料的利用程度。
这一基本目的分别通过根据权利要求1和5的方法和装置来达到。借助于在被获得的吸入空气中直接蒸发液体,能达到在吸入空气中蒸汽数量的自行调节,因此不再需要单独调节在吸入空气中的空气量,这是一个特殊优点。
本发明的进一步目的在于:从发动机燃烧工序发生的低等级废弃能量中回收用于蒸发的能量。
这个目的通过根据根据权利要求2或3的方法以及通过根据权利要求7或8的装置来达到。
下面,详细介绍本发明方法和设备的最佳实施例。介绍将参照附图进行,仅有的一张附图,画出一台与本发明装置实施例相连的内燃发动机。
附图描述了一台具有六个缸2的内燃发动机1。该发动机为涡轮增压柴油机。涡轮增压器包括一个涡轮3,它借助于一根排气导管4与发动机1的排气侧相连。涡轮借助于一根轴与一台压缩机6相连并驱动后者,以便压缩经过一根第一空气导管7供应到发动机1吸入侧的空气。在压缩机6和发动机1之间安置一台润湿装置8,它在这个实施例中是一个润湿塔8,它用来给经过一根第二空气导管9供入发动机1之前的吸入空气供应水蒸气。水蒸气由水产生,该水由水箱10供应经过热交换器12到达润湿塔8。发动机冷却水借助于导管12循环流过热交换器11,从而在热交换器中将水加热。将该水送入润湿塔8的上部,在此同时将空气送入该塔的下部。水在润湿塔内由一个喷嘴(未画出)驱散,下落呈薄雾状,然后重新被收集在润湿塔8的底部,再从那里通过导管13排到水箱10中。在此同时,空气在压力状态下被喂入润湿器8并向上流动进入第二空气导管9。在润湿塔8内,空气和水在此相对方向流动的同时相互接触。燃料通过一根燃料导管14供入发动机1,该发动机与一台发电机15相连。
蒸汽的供应过程如下。吸入空气在压缩机6中被压缩,压缩机6由涡轮3通过轴5驱动,而涡轮3又由发动机1的排出气体驱动。经过压缩并且因此被加热的吸入空气被引入润湿塔8的下部,但位于水(它被收集在润湿塔8的底部)的上方。水从水箱10中被收集并送入润湿塔8的上部,并在此通道上流过热交换器并变热。在润湿塔8中,水被驱散成薄雾并通过,在落下通过润湿塔8的同时,贯穿向上流动通过润湿塔8的吸入空气。于是,一部分水被蒸发,伴随吸入空气流出润湿塔并进入发动机1的燃烧室。因此,要供应比被汽化水流量大出许多的水流量。因此,汽化能量是从实际的水中获得的。这被称作焓变。当水的汽化用这种方法在一种气体混合物中进行时,由于汽化在局部压力下发生,所述局部压力是水蒸气暂时施加在该气体混合物之中的,与只有水出现的方式(例如在现有技术工艺中)相比较,汽化能在低得多的温度下进行。这意味着,靠近空气供入润湿塔8的那一点处的汽化将在很低温度下发生,从而增加向上通过润湿塔8的湿度,并且也增加了局部压力。当上述强有力的汽化在相对很低的温度发生时,就能在汽化工序中使用低等级能量。所述低等级能量可从冷却水和排出气体中作为发动机1的余热大量获得。因此,如上所述的冷却水、排出气体或者两者都能用来预热被供入润湿塔8之前的水。
上文已描述了本发明方法和装置的最佳实施例。它们仅起例子作用,在由所附权利要求确定的本发明范围内可进行各种变化。例如,能汽化除水以外的任何符合需要的适当液体。驱散液体的喷嘴也能用另一种结构替代,液体能在该结构上或者通过该结构(取决于它的设计)朝润湿装置的底部流动。
Claims (6)
1.一种给吸入空气供应蒸汽的方法,所述吸入空气被供往一台内燃发动机(1),所述方法包括吸入空气与液体在一台润湿装置(8)中接触的步骤,还借助于向润湿装置(8)同步地送入吸入空气和液体并使吸入空气和液体以相反方向流过润湿塔(8)的多个步骤实行蒸汽的供应,其特征为,所述多个步骤包括压缩被供给蒸汽以前的吸入空气,以及利用所述发动机(1)冷却水或排出气体的内在能量来预热被送入润湿塔(8)以前的液体。
2.根据权利要求1所述的方法,其特征为,所述多个步骤包括:将所述液体送入所述润湿装置(8)上部;将所述液体驱散成薄雾;让所述薄雾自由下落通过所述润湿装置(8);将所述吸入空气送入所述润湿装置(8)的下部以及让所述吸入空气向上流动穿过所述薄雾。
3.根据权利要求1或2所述的方法,其特征为:所述多个步骤包括:将液体送入润湿装置(8)上部;将液体散布在所述润湿装置(8)内安装的一个实体上并让所述液体沿所述实体向下流动;以及将吸入空气送入所述润湿装置(8)的下部并让所述吸入空气沿着所述实体向上流动。
4.一种用来给吸入空气供应蒸汽的装置,所述吸入空气被供往一台内燃发动机,所述装置包括:一台润湿装置(8),它具有一个用来将液体送入所述润湿装置(8)的第一连接件以及一个用来将吸入空气送入所述润湿装置(8)的第二连接件,所述润湿装置(8)适于给所述吸入空气供应蒸汽,所用的方法是:使所述吸入空气与所述液体在通过所述润湿装置(8)反向流动的同时相互接触,其特征为,所述装置进一步包括:一个预热器(11),它被连接到所述润湿装置(8)的第一连接器上以便预热被送入所述润湿装置(8)以前的液体,所述预热器(11)或者与所述发动机(1)的冷却水或者与所述发动机(1)的排出气体相连,以便将所述冷却水的内在能量传输给所述液体,而且所述润湿装置(8)的第二连接器与一台压缩机(6)相连,所述压缩机(6)适于压缩所述吸入空气并连接到所述发动机上。
5.根据权利要求4所述的装置,其特征为,还包括一个喷嘴,所述喷嘴被安置在所述润湿装置(8)的上部并被连接到所述第一连接件上,以便散布和传播液体成一种薄雾。
6.根据权利要求4和5所述的装置,其特征为,安装在所述润湿装置(8)内部的一个结构,所述液体就沿着所述结构向下流动。
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SE9400652A SE502452C2 (sv) | 1994-02-25 | 1994-02-25 | Sätt att tillföra ånga till insugsluften till en förbränningsmotor och en anordning därtill |
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DE19938292A1 (de) * | 1999-08-12 | 2001-02-15 | Munters Euroform Gmbh Carl | Vorrichtung zur Befeuchtung der Einlaßluft von Brennkraftmaschinen mit Turbolader |
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CN100447385C (zh) * | 2002-05-21 | 2008-12-31 | 曼B与W狄赛尔公司 | 大型增压内燃发动机 |
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-
1994
- 1994-02-25 SE SE9400652A patent/SE502452C2/sv not_active IP Right Cessation
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1995
- 1995-01-16 CN CN95192192A patent/CN1058552C/zh not_active Expired - Fee Related
- 1995-01-16 KR KR1019960704682A patent/KR100374967B1/ko not_active IP Right Cessation
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- 1995-01-16 EE EE9600103A patent/EE03315B1/xx not_active IP Right Cessation
- 1995-01-16 CZ CZ19962499A patent/CZ289882B6/cs not_active IP Right Cessation
- 1995-01-16 PT PT95910832T patent/PT795078E/pt unknown
- 1995-01-16 EP EP95910832A patent/EP0795078B1/en not_active Expired - Lifetime
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- 1995-01-16 WO PCT/SE1995/000026 patent/WO1995023286A1/en active IP Right Grant
- 1995-01-16 AU AU18646/95A patent/AU683731B2/en not_active Ceased
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- 1995-01-16 BR BR9506898A patent/BR9506898A/pt not_active IP Right Cessation
- 1995-01-16 DE DE69516307T patent/DE69516307T2/de not_active Expired - Lifetime
- 1995-01-16 JP JP7522288A patent/JPH09509714A/ja active Pending
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1996
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