CN1321218A - 改进的二冲程轴流式发动机 - Google Patents
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Abstract
本发明涉及包括集成式涡轮增压器(308)的轴流式二冲程发动机(100),发动机(100)有二个以上气缸(101-105)布置在发动机缸体(106)的纵轴线(305)周围的圆周上,发动机缸体(106)中有一内腔,形成排气道(307)和进气道(306),涡轮增压器位于内腔中因而也位于发动机缸体(106)内,涡轮增压器(308)的废气涡轮(107)位于排气道(307)中而增压涡轮位于进气道(306)中。
Description
发明的技术领域
本发明涉及二冲程轴流式发动机(axial engine)或引擎,具体说,涉及加入涡轮增压器的二冲程发动机或引擎。术语“发动机”及“冲程”可与“引擎”及“循环”互换。
发明的背景
这些年来,发动机制造厂商研究改进了引擎的重量、尺寸、效率和制造成本,这在一定程度上促进了轴流式发动机的发展。轴流式发动机包括发动机气缸体(engine block),其中各气缸在发动机气缸体轴线周围沿一圆周均匀分布,而不像传统的发动机那样布置在一直线上,或呈V型或水平对置分布。轴流式发动机活塞的往复运动通过诸如公开在NZ221336中那样的斜盘结构可转变成输出轴的旋转运动。
轴流式二冲程发动机或引擎已开发出好几种结构,最大限度提高输送到燃烧室的空气的效率。采用的一种技术就是引进涡轮增压器,某些现有的轴流式发动机也有涡轮增压器,但它们放在气缸体之外,带来维修和操作问题,因此,拥有与轴流式发动机相关的涡轮增压器的优点并未全部实现。大多数轴流式发动机提供的一个优点是结构紧凑,但有了在外面的部件,如放在外面的涡轮增压器,这一优点就没有了或很小。
发明的概述
因此本发明的目的是提供一种轴流式二冲程发动机,其涡轮增压器固定方便,即克服了上述轴流式发动机产生的某些缺点。
所以,可认为本发明大体上是一种轴流式二冲程发动机,其发动缸体有二个以上气缸沿发动机缸体轴线周围分布。发动机缸体的每一个气缸有一个或一个以上排气孔。
发动机内有一空腔,构成排气道和进气道。发动机还包括涡轮增压器,它有一个废气涡轮和一个增压涡轮。涡轮增压器位于内腔中,因此增压涡轮位于进气道内而废气涡轮位于排气道内。废气涡轮这样定位因而从各排气口出来的废气可驱动废气涡轮。
附图简要说明
本发明的优选实施例可参照附图进行说明,其中:
图1是从涡轮增压器排气端观看的发动机气缸体平面图
图2是发动机缸体局部平面图,它表明径流(离心)式压气机,并去掉空气室的外罩。
图3是图1的A-A剖面,剖面穿过多缸轴流式发动机,示出涡轮发动机和一个气缸。
图4是多缸轴流式发动机另一实施例的剖面图,示出涡轮增压器,一个排气道伸到了发动机气缸体外面的气缸
优选实施方案的详述
参看附图,显而易见,根椐本发明所述的轴流式二冲程发动机及集成涡轮增压器可以多种形式实施。下面几个实例只是作为例子。
图1是轴流式二冲程发动机的附图,它包括根椐本发明所述的集成涡轮增压器。轴流式二冲程发动机或引擎100包括发动机缸体106,它最好是铝铸件,其中装入许多气缸101-105。各气缸布置在发动机缸体106的纵轴305周围的圆周上,使各气缸在轴线305周围均匀分布。纵轴305示于图3及图4中。发动机结构必须有二个以上的互相均匀隔开的气缸,但在本优选实施例中有5个气缸101-105。
轴流式二冲程发动机100还包括涡轮增压器308,它优选地布置在发动机缸体106的内部。涡轮增压器308最好与发动机缸体106的轴线305共轴而处于均布气缸101-105的包围中。
图1示出涡轮增压器308的端视图,图上可见废气涡轮107,它是涡轮增压器的组成部分,它显示布置在发动机缸体106内的涡轮增压器308大体上在沿圆周分布的气缸101-105的中央。图3及图4较清楚地显示整个涡轮增压器308的位置。每个气缸101-105上有各自的喷油嘴、火花塞或其他与喷射或点火相关的部件的通道,发动机缸体上还有系紧螺栓的螺栓孔。
同样,图2示出轴流式二冲程发动机100的仰视平面图。为了显露增压涡轮200,这是涡轮增压器308对置端的部件,已将空气室的外罩320去除。在增压涡轮301和沿圆周分布的气缸101-105的中间是空气室201。空气室201通过转向通道202-206通到气缸101-105。簧片阀207-211位于各转向通道202-206与空气室201中间,可控制空气室`201与各转向通道202-206之间的流动。下面详细描述空气室201及转各向通道202-206的作用。
现在参看图3和图4详细说明集合涡轮增压器308的结构。图3是发动机缸体106的一个优选实例的剖视图,缸体106的轴线305周围均布5个气缸101-105。该剖面是图1所示A-A剖面,图上示出5个气缸101-105中的1个101。
各气缸101-105是相同的。因此虽然这些说明指的是看见的气缸101,但显然这些说明可扩大到发动机气缸体106中所有气缸101-105。活塞300在气缸101内作往复运动,气缸体101已装上喷油嘴301或其他的将燃料送到气缸101并点火燃烧的喷射点火部件。一般地说,这些部件基本上以二冲程发动机的传统方式工作。
活塞300连接一根连杆302,在连杆302的一端是球形接头303,被定位在活塞300底部内的关联的球座304中。发动机缸体中106中的活塞300与连杆302组合的往复运动,通过任何适合于轴流式发动机的动力传动装置,如斜盘装置,被转换成输出轴的旋转运动。
在发动机缸体内有一空腔,它与发动机缸体106的纵轴线305基本上共轴。该空腔构成吸气道306和排气收集器导管307。涡轮增压器308位于此空腔内。涡轮增压器308在发动机缸体106中的位置基本上与轴线305重合,因此,平行于气缸101-105的长度方向。涡轮增压器308包括部件309,它支撑着旋转的涡轮轴310,该轴的一端配置废气涡轮107,轴的另一端是增压涡轮,即径流式压气机200。涡轮增压器308还包括增压涡轮端轴承311和废气涡轮端轴承312。这二个轴承在本优选实施例中分别安装在压气机200和废气涡轮107的内侧。在一可选用的实施例中,轴承311、312就安装在外侧,正如许多船舶发动机经常采用的。在一优选实施例中,涡轮增压器308还包括导叶313,它紧靠废气涡轮107且与发动机缸体106的纵轴305重合。
在一可选用的实例中,导叶313上钻孔,使冷却剂及/或润滑剂可输送到装在内侧的废气轮端轴承312。冷却剂可以是水,润滑剂可以是任何各选的润滑油。
在另一可选实施例中,涡轮轴310是空心的,因此冷却空气和油雾可从导叶313及排气端轴承312流向压气机端轴承311。
内腔中最好还有向里凸起的机制环形面,也叫台肩314,315,是机加工而成。涡轮增压器的部件309安装到该向里凸起环形面314,315上,使废气涡轮107及导叶313位于内腔排气道307中而增压涡轮200在内腔的进气道306中,废气涡轮107及导叶313可位于排气道307的任何地方。
气缸101的壁上有一个或一个以上排气孔316,可经废气通道317到达排气道307。气缸101的壁上还有一个或一个以上进气口319,这些孔经图2所示转向通道202到达空气室201。簧片阀207位于转向通道202和空气室201入口之间,用于控制空气在空气室201和转向通道202之间的流动,空气室201有一外罩320,此外罩320和涡轮增压器部件307之间是扩散器321。
图4示出具有集合涡轮增压器308的发动机缸体106的可选实施例。内腔的排气道307伸到发动机缸体106的主体外,排气道307的外面部分400与里面部分401转一定角度。排气道307的里面部分401和外面部分400的角度大致为90度,但显然其他角度也可以。
涡轮轴310穿过排气道307的里面段401并在排气道307的外面段400上形成的机座中受到转动支承。涡轮轴310在端轴承503中转动,导叶313及废气涡轮307配置在涡轮轴310上,其位置约在排气道307的内外段401和400的交界处。显而易见,导叶313和废气涡轮307可放在排气道307内任何位置上。
现在参看气缸101来说明本发明优选实施例的运转。显然各气缸101是相同的,因此有关气缸101的说明可推广到其他气缸。
涡轮增压器由气缸101排出的废气327驱动,在发动机循环的排气阶段,活塞300在气缸101内往下运动,使气缸101的壁上的一个或一个以上排气孔316暴露出来。燃烧循环排放的废气327由气缸101经过这些一个或一个以上的排气孔316排出。排出的废气327通过排气道317,又穿过其中的导叶313,直接导向废气涡轮107。一旦废气327冲击到废气涡轮107上即进入排气道307。
废气涡轮的转动使涡轮轴310旋转,从而驱动增压涡轮200,增压涡轮200的转动将空气328经过吸气道302吸入并使压缩空气328经扩散器321进入空气室201。在进气冲程时活塞300上行,差压使簧片阀207开启并使空气328从空气室201转移到活塞300下面的容积326中,在然烧循环的空气迁移阶段,活塞300在气缸101中往下移动,向活塞下方的空气328加压,因而关闭簧片阀207。当活塞300再向下移动时,气缸101壁上的进气口319便暴露出来,活塞300下方容积326内的受压缩的空气328便经转向通道202-206和一个或一个以上的进气孔319进入气缸101。
在又一优选实施例中,本发明还包括一个冷却剂夹套322。夹套322是涡轮增压器的部件309,向里凸出面314、315,和发动机缸体106一起组合所形成的。平常使用水作冷却剂,是经冷却剂进口323供向冷却剂夹套322的。冷却剂流经冷却剂夹套322环流,能使涡轮增压器308散热,涡轮增压器部件309和由里凸出面314、315与发动机缸体106组成的金属块的结合提供有效散热,使循环的冷却剂在发动机100停止运转时可散去涡轮增压器308的热量,涡轮增压器308的这种方式的散热可减少在涡轮增压器308的热量,涡轮增器308的这种方式的散热可减少在涡轮增压器308中使用的润滑剂发生的碳化的可能性。
在又一实例中,水冷夹套包围排气道307的外面段400,为涡轮轴310及轴承503提供冷却。
Claims (9)
1.一种轴流式二冲程发动机包括:
发动机缸体,它有二个以上均布在发动机缸体轴线四周的气缸,每个气缸上有一个或一个以上排气口,
位于所述的发动机缸体内的内腔,该内腔构成排气道和进气道,及涡轮增压器,它包括废气涡轮和增压涡轮,
其中,涡轮增压器配置在所述的内腔中,使增压涡轮位于进道内而废气涡轮位于排气道内,废气涡轮的位置使排气口出来的废气可以驱动废气涡轮。
2.根椐权利要求1所述的轴流式二冲程发动机,其中涡轮增压器包括一部件,该部件固定在位于内腔中的向内凸出的机加工环形面上。
3.根椐权利要求1所述的轴流式二冲程发动机,其中涡轮增压器还包括一导叶,它位于排气道内,使各排气口出来的废气可经过导叶而入废气涡轮。
4.根椐权利要求1所述的轴流式二冲程发动机,其中由内腔构成的排气道至少有一部分延伸到发动机缸体外。
5.根椐权利要求3所述的轴流式二冲程发动机,其中导叶上钻孔,使导叶能将冷却剂或润滑剂传送到涡轮的端轴承。
6.根椐权利要求2所述的轴流式二冲程发动机,其中环形面结合发动机缸体及涡轮增压器部件形成冷却剂夹套,夹套中环流的冷却剂可冷却涡轮增压器。
7.利要求1所述的轴流式二冲程发动机还包括排气道,它延伸到发动机缸体以外,其中还有冷却剂夹套可冷却外侧排气端轴承。
8.根椐权利要求1所述的轴流式二冲程发动机,其中涡轮端轴承装在涡轮的内侧和外侧。
9.种将可燃混合物装料输送到轴流式发动机缸体的气缸中的方法包括以下几步:
将气缸排出的废气引导到位于发动机缸体内的涡轮增压器的废气涡轮,
由排出的废气转动废气涡轮,从而转动在发动机缸体内的增压涡轮,
借助于转动增压涡轮使空气穿过发动机缸体的进气道吸入,将此空气引导到发动机缸体的一个或一个以上的气缸中。
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US (1) | US6354083B1 (zh) |
EP (1) | EP1121517A4 (zh) |
JP (1) | JP2002523664A (zh) |
CN (1) | CN1109184C (zh) |
AU (1) | AU763398B2 (zh) |
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CN104047703A (zh) * | 2013-03-15 | 2014-09-17 | 通用汽车环球科技运作有限责任公司 | 用于涡轮增压回流扫气二冲程发动机的气口排列系统 |
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US20090136368A1 (en) * | 2007-11-28 | 2009-05-28 | Steven Don Arnold | Center Housing and Bearing and Shaft Wheel Assembly for Turbochargers |
DE102009012252A1 (de) * | 2009-03-07 | 2010-09-09 | Bayerische Motoren Werke Aktiengesellschaft | Abgasturbolader |
US20120321455A1 (en) * | 2009-11-13 | 2012-12-20 | Continental Automotive Gmbh | Turbocharger housing |
DE102009053106A1 (de) | 2009-11-13 | 2011-05-19 | Continental Automotive Gmbh | Turboladergehäuse und Werkzeugeinrichtung zur Bearbeitung des Turboladergehäuses |
IT1400446B1 (it) * | 2010-06-11 | 2013-05-31 | C R F Società Consortile Per Azioni | Motore a combustione interna sovralimentato |
WO2012013169A1 (de) * | 2010-07-29 | 2012-02-02 | Hyon Engineering Gmbh | Umweltfreundlicher verbrennungsmotor mit pneumatischem ventil |
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ITFI20120289A1 (it) * | 2012-12-21 | 2014-06-22 | Nuovo Pignone Srl | "sealing arrangement for axially split turbomachines" |
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CN111556920B (zh) * | 2018-01-29 | 2022-10-18 | 三菱重工发动机和增压器株式会社 | 带增压器的内燃机 |
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1999
- 1999-08-19 AU AU54540/99A patent/AU763398B2/en not_active Ceased
- 1999-08-19 WO PCT/NZ1999/000135 patent/WO2000011330A2/en not_active Application Discontinuation
- 1999-08-19 EP EP99940746A patent/EP1121517A4/en not_active Withdrawn
- 1999-08-19 CN CN99810239A patent/CN1109184C/zh not_active Expired - Fee Related
- 1999-08-19 JP JP2000566557A patent/JP2002523664A/ja active Pending
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CN104047703A (zh) * | 2013-03-15 | 2014-09-17 | 通用汽车环球科技运作有限责任公司 | 用于涡轮增压回流扫气二冲程发动机的气口排列系统 |
CN104047703B (zh) * | 2013-03-15 | 2017-01-04 | 通用汽车环球科技运作有限责任公司 | 用于涡轮增压回流扫气二冲程发动机的气口排列系统 |
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WO2000011330A3 (en) | 2000-11-23 |
CN1109184C (zh) | 2003-05-21 |
AU763398B2 (en) | 2003-07-24 |
AU5454099A (en) | 2000-03-14 |
EP1121517A2 (en) | 2001-08-08 |
US6354083B1 (en) | 2002-03-12 |
EP1121517A4 (en) | 2004-06-02 |
JP2002523664A (ja) | 2002-07-30 |
WO2000011330A2 (en) | 2000-03-02 |
AU763398C (en) | 2000-03-14 |
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