CN101608587B - Resonant intake tube of natural gas engine - Google Patents

Resonant intake tube of natural gas engine Download PDF

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Publication number
CN101608587B
CN101608587B CN 200910072559 CN200910072559A CN101608587B CN 101608587 B CN101608587 B CN 101608587B CN 200910072559 CN200910072559 CN 200910072559 CN 200910072559 A CN200910072559 A CN 200910072559A CN 101608587 B CN101608587 B CN 101608587B
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China
Prior art keywords
intake manifold
intake
cavity
section
gas engine
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CN 200910072559
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Chinese (zh)
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CN101608587A (en
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姚崇
李文辉
杨立平
范立云
马修真
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哈尔滨工程大学
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Publication of CN101608587A publication Critical patent/CN101608587A/en
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Abstract

The invention provides a resonant intake tube of a natural gas engine, comprising a resonant cavity, an intake collector positioned on the upper part of the resonant cavity and intake manifolds positioned on the lower part of the resonant cavity; wherein, the side wall surface of the resonant cavity, which is connected with the intake collector is shaped like a section of arc surface; the whole resonant cavity is crescent; four intake manifolds go along the center line of the intake collector and are pairwise symmetrical with the planes vertical to the two crescent sides of the resonant cavity; the length of the two intake manifolds in the middle is larger than that of the intake manifolds at both sides; the length of path of the air flowing from the entrance of the intake collector to the exit of each intake manifold is equal. The resonant intake tube not only can fully utilize the resonance effect of the intake air to improve the charging efficiency of the engine but also can improve the unevenness of the intake air of the natural gas engine.

Description

天然气发动机谐振进气管 The natural gas engine intake pipe resonance

(-)技术领域 (-) FIELD

[0001] 本发明涉及发动机技术领域,具体涉及一种天然气发动机谐振进气管结构。 [0001] The present invention relates to the technical field of the engine, particularly, to a natural gas engine intake pipe resonant structure.

(二)背景技术 (B) Background Art

[0002] 能源短缺和环境污染问题的日益严重迫使汽车制造商积极的研究发动机节能技术,开发高效后处理装置,积极探索石油替代能源。 [0002] the increasingly serious energy shortage and environmental pollution problems forced the car manufacturers active research engine energy-saving technology, the development of efficient post-processing device, and actively explore alternative energy sources. 天然气以其资源丰富和燃烧清洁的优势成为汽车替代能源的首选。 Its rich natural gas resources and the advantages of clean burning car of choice for alternative energy. 然而天然气为气体燃料,当采用进气道形成混合气时气体燃料会占用一定的进气充量容积,使进入汽缸的空气量减少,因此天然气发动机的功率密度通常比汽油机和柴油机低10%左右。 However, natural gas is a gas fuel, when using a gaseous fuel mixture gas inlet is formed will occupy a certain volume of the intake charge the amount of air entering the cylinder is reduced, thus the power density of the gas engine is usually lower than gasoline and diesel is about 10% . 由于四冲程发动机的进气管中,进气门的周期性启闭和活塞的往复运动使进气管内的气体呈现间歇性流动,同时产生强烈的气体压力波动现象, 进气过程中进气门处会产生一定振幅的压力波动,此压力波以音速沿进气管传播,并且在进气管开口端和进气门之间往复反射,如果能够对进气系统结构进行合理设计,使下一循环进气门关闭前刚好有一个正压波峰返回到进气门,那么就可以把更多的气体推入气缸, 达到增压的效果,然而由于各缸进气管内的流动损失和压力波动效应不同会使进入各缸的空气量存在差异,各缸空气与燃油的混合不同,燃烧过程的组织也不同,将致使各缸的燃烧过程产生差异,直接影响发动机的工作稳定性、经济性和排放性能。 Since a four-stroke engine intake pipe, the intake valve opening and closing of the periodic reciprocation of the pistons and the gas inside the intake pipe exhibits intermittent flow, while a strong fluctuation of the gas pressure, the intake valve during the intake will produce a constant amplitude pressure fluctuations, the pressure waves propagation speed of sound along the intake pipe, and is reciprocally reflected between the intake pipe and the intake valve an open end, if possible rational design of the intake system structure, so that the next intake cycle just before the door is closed there is a return to the positive peak of the intake valve, it can be pushed into the more gas cylinder, pressurized to achieve the effect, however, since each cylinder intake flow losses and pressure fluctuations cause different effects in the trachea present amount of air entering each cylinder of the difference, the mixing of air and fuel to each cylinder is different organizations different combustion process, the combustion process will cause a difference in each cylinder, a direct impact on the engine operational stability, economy and emissions performance.

(三)发明内容 (Iii) Disclosure of the Invention

[0003] 本发明的目的在于提供一种能提高天然气发动机充气效率,改善发动机进气不均勻性,从而改善发动机动力性、经济性和排放性能的天然气发动机谐振进气管。 [0003] The object of the present invention is to provide a natural gas engine charging efficiency can be improved to improve the non-uniformity of the engine intake air, thereby improving engine power, economy and emissions performance of the engine gas intake pipe resonance.

[0004] 本发明的目的是这样实现的: [0004] The object of the present invention is implemented as follows:

[0005] 一种天然气发动机谐振进气管,包括谐振腔,位于谐振腔上部的进气总管,位于谐振腔下部的进气歧管;谐振腔与进气总管相连接的侧壁面形状为一段圆弧面,整个谐振腔呈月牙形,四个进气歧管沿着经进气总管中心线且与谐振腔两个月牙形侧面相垂直的平面两两对称,中部的两根进气歧管的长度大于两侧的进气歧管的长度,空气从进气总管入口到各进气歧管的出口所流经的路径长度相等。 [0005] A natural gas engine intake resonator, comprising a cavity located in the upper portion of the intake manifold cavity, is located in a lower portion of the resonant cavity of the intake manifold; cavity sidewall surface shape of the intake manifold is connected to an arc surface, the entire cavity crescent, four intake manifold along a plane through the center line of the intake manifold and the two crescent-shaped side surfaces perpendicular to the resonator symmetrical two by two, the length of the two intake manifold of the middle greater than equal on both sides of the length of the intake manifold, air from the intake manifold to each intake inlet of an outlet manifold through which flows the path length.

[0006] 本发明还可以包括这样一些特征: [0006] The present invention may also include some of the features:

[0007] 1、所述进气歧管由与谐振腔相连的进气歧管上段和与进气歧管上段连接的进气歧管下段构成,进气歧管上段和进气歧管下段上分别带有第一长方形孔板和第二长方形孔板,两长方形孔板之间有一密封垫片。 [0007] 1, the intake manifold comprises a lower section of the intake manifold of the intake manifold and the resonator connected to the upper section and the intake manifold section connected to the intake manifold section and the intake manifold lower section on rectangular plates each having a first and a second rectangular plate, a sealing gasket between the two rectangular plates.

[0008] 2、进气歧管上段与谐振腔和第一长方形孔板铸造成一体。 [0008] 2, the intake manifold section and a first cavity and a rectangular plate integrally cast.

[0009] 3、进气歧管下段与发动机缸盖相连接的端口处有一个正方形法兰,进气歧管下段由一段内部为圆孔的弧形段和一段内部由圆孔逐渐转换成方孔的过渡段组成。 [0009] 3, intake manifold port at the lower section of the engine head and connected to a square flange, the lower intake manifold of an internal section of circular arc segments and an inner section of the gradual transition from the round hole prescription transition section hole components.

[0010] 4、进气总管以圆角与谐振腔圆弧面相连接。 [0010] 4, the intake manifold is connected to the fillet cavity arcuate surface.

[0011] 该发明的有益之处:谐振进气管结构不仅可以充分利用进气的谐振效应提高发动机充气效率,而且可以改善天然气发动机的进气不均勻性。 [0011] The invention is beneficial in that: a resonance intake pipe structure can not only make full use of the resonance effect of improving the engine intake air charging efficiency can be improved and unevenness in the intake gas of the engine. (四)附图说明 (Iv) Brief Description of Drawings

[0012] 图1为本发明的总体结构图; [0012] FIG. 1 is an overall structural view of the present invention;

[0013] 图2谐振进气管上体结构; [0013] FIG. 2 upper body intake pipe resonant structure;

[0014] 图3进气歧管上段和进气歧管下段之间密封垫片; [0014] FIG. 3 intake manifold between the upper and lower intake manifold gasket;

[0015] 图4进气歧管下段结构; [0015] FIG 4 an intake manifold lower section structure;

[0016] 图5单根进气歧管下段结构。 [0016] FIG. 5 a single intake manifold lower section structure.

(五)具体实施方式 (E) Detailed Description

[0017] 下面结合附图举例对本发明做更详细地描述: [0017] By way of example in conjunction with the accompanying drawings The present invention will be described in more detail:

[0018] 一种天然气发动机谐振进气管,由进气总管,谐振腔和进气歧管构成,进气总管的长度为50mm,内径为60mm,进气总管上有一正方形法兰盘用于安装节气门,进气总管与谐振腔通过半径为IOmm的圆角连接,减少从进气总管流向各歧管时的能量损失,谐振腔的容积为2. 5L,谐振腔与进气总管相连接的一侧壁面形状为一段圆弧面,整个谐振腔呈现出月牙形,四个进气歧管沿着经进气总管中心线且与谐振腔两个月牙形侧面相垂直的平面两两对称,两侧短歧管长度为500mm,但空气从进气总管入口到各歧管的出口所流经的路径长度相同。 [0018] A gas resonance engine intake manifold, the intake manifold, the intake manifold and the resonator tubes, the length of the intake manifold of 50mm, an inner diameter of 60mm, a square flange for mounting on the intake manifold section valve, intake manifold and the resonator is connected by fillet radius IOmm reduce the energy loss from the respective manifolds to flow the intake manifold, the volume of the cavity is 2. 5L, the intake manifold cavity connected to a side wall surface is an arc surface shape, crescent showing the entire cavity, four intake manifold through the intake manifold along a plane perpendicular to the center line and symmetric two by two side surfaces and two crescent-shaped cavity with both sides the short length of the manifold of 500mm, but the same inlet air from the intake manifold to the respective outlet manifold of the flow through path length.

[0019] 图1中一种天然气发动机谐振进气管,它由进气总管1,谐振腔2和进气歧管3〜 6构成。 [0019] FIG 1 resonance of one gas intake pipe of the engine, which consists of an intake manifold, the resonator 2 and the intake manifold 3 ~ 6 configuration. 谐振进气管由两部分构成:一部分为谐振进气管上体,一部分为谐振进气管下体, 两部分各带有一个长方形的孔板16和19,上体孔板16与下体孔板19之间有一密封垫片18,如图2〜图4所示。 Resonance intake pipe consists of two parts: the upper body part of the resonant intake pipe, the intake pipe resonant lower body part, the two parts each having a rectangular plates 16 and 19, a plate 16 between the upper body 19 and lower body plate 18, FIG. 2 ~ 4 as shown in FIG gasket.

[0020] 图2中进气总管1的内径7为60mm,长度为50mm,其上有一正方形法兰盘8用于安装节气门,法兰盘8边长为100mm,厚度为5mm,法兰盘8上有四个均布的Φ 8的光孔,孔心距为76mm ;进气总管1与谐振腔2通过半径为IOmm的圆角9连接,并且进气总管1位于谐振腔2圆弧面17的几何中心;谐振腔2的容积为2. 5L,谐振腔2侧面11为月牙形,谐振腔2的圆角10的半径为IOmm ;四个进气歧管3〜6与谐振腔2相连接,且沿着经进气总管1中心线且与谐振腔2的两个月牙形侧面相垂直的平面两两对称,两侧歧管3和6的长度为500mm,但空气从进气总管入口到各歧管的出口所流经的路径长度相同,能够改善天然气发动机各缸进气不均勻性;四个进气歧管均被分为两部分,两部分歧管通过两个长度为480mm,宽为80mm,厚度为5mm长方形孔板16和19相连接,同时两个孔板还能起到增加谐振进气管总体强度 Inner diameter [0020] FIG. 2 is an intake manifold 7 is 60mm, a length of 50mm, which has a square flange for mounting the throttle valve 8, the flange 8 side length of 100mm, a thickness of 5mm, flange there are four uniformly distributed on [Phi] 8 8 aperture, the hole center distance of 76mm; an intake manifold 1 and the cavity 2 by fillet radius IOmm 9 is connected, and the intake manifold 1 is located in arcuate face cavity 2 the geometric center 17; 2 is the volume of the cavity 2. 5L, resonant cavity 2 side 11 has a crescent shape, the radius of the fillet 10 of the cavity 2 is IOmm; four intake manifold and the resonator 2 with 3 ~ 6 twenty-two asymmetric connection, through the intake manifold and along the center line of the side surface 1 and with two crescent-shaped resonator plane 2 perpendicular to the sides of the manifold 3 and the length of the tube 6 is 500mm, but the air from the intake manifold inlet each manifold outlet to flow through the same path length, can improve engine intake gas of each cylinder unevenness; four intake manifold are divided into two parts, two by two branch pipes of 480mm length, a width of 80mm, thickness of 5mm rectangular plates 16 and 19 are connected, while the two plates also serve to increase the overall strength of the resonant intake pipe 的作用,位于上体部分的四个歧管12〜15在铸造过程中即直接与谐振腔2和孔板16连接,位于下体部分的四个歧管20〜23单独铸造而成,并连接在孔板19 上,位于上体和下体两部分歧管在安装过程中按照12-20,13-21,14-22,15-23的对应关系进行连接。 The role of the upper body portion located 12~15 i.e. four manifold is connected directly to the casting cavity 16 and the orifice plate 2, the lower body portion located four manifold 20~23 cast separately and connected the orifice plate 19, is located in the upper body and lower body two branch tubes are connected in a corresponding relation to 12-20,13-21,14-22,15-23 during installation.

[0021] 天然气发动机谐振进气管下体部分的歧管还有一个特征:与发动机缸盖相连接的端口有一个正方形法兰26 :边长为60mm,厚度为5mm,且存在一段IOOmm长的从内径为50mm 圆孔24过度到边长为40mm方孔27的管路25,如图5所示,该结构有利于将空气加速,在进气道内将动能转化为压力势能,从而提高充气效率。 [0021] The natural gas engine intake pipe resonant lower body portion wherein there is a manifold: the engine head and is connected to the port has a square flange 26: side length of 60mm, a thickness of 5mm, and there is a long period from an inner diameter IOOmm 24 is a 50mm circular line over to the side length of 40mm square holes 27 25, shown in Figure 5, the structure facilitates the air acceleration in the inlet pressure of the kinetic energy into potential energy, thereby improving the charging efficiency.

Claims (5)

1. 一种天然气发动机谐振进气管,包括谐振腔,位于谐振腔上部的进气总管,位于谐振腔下部的进气歧管;其特征是:谐振腔与进气总管相连接的侧壁面形状为一段圆弧面,整个谐振腔呈月牙形,四个进气歧管以经进气总管中心线且与谐振腔两个月牙形侧面相垂直的平面为对称面对称布置于谐振腔下部,中部的两根进气歧管的长度大于两侧的进气歧管的长度,空气从进气总管入口到各进气歧管的出口所流经的路径长度相等。 A natural gas engine intake resonator, comprising a cavity located in the upper portion of the intake manifold cavity, the cavity in the lower part of the intake manifold; characterized in that: the shape of the cavity side wall surface of the intake manifold is connected an arc surface, the entire cavity crescent, four intake manifold through the intake manifold to the centerline plane and with two crescent-shaped side surfaces perpendicular to the resonator is arranged symmetrically to the lower face of said resonant cavity, the central the length of the length of the two intake manifold is greater than the sides of the intake manifold, the air intake manifold is equal to the respective outlet through which flows the length of the path from the inlet to the intake manifold.
2.根据权利要求1所述的天然气发动机谐振进气管,其特征是:所述进气歧管由与谐振腔相连的进气歧管上段和与进气歧管上段连接的进气歧管下段构成,进气歧管上段和进气歧管下段上分别带有第一长方形孔板和第二长方形孔板,两长方形孔板之间有一密封垫片。 The natural gas engine according to claim 1 resonance intake pipe, characterized in that: the intake manifold lower section of an intake manifold of an intake manifold and the resonator connected to the upper section and the intake manifold segments connected configuration, respectively, an intake manifold having a first plate and a second oblong rectangular plate and the upper section of the intake manifold lower section, with a sealing gasket between the two rectangular plates.
3.根据权利要求2所述的天然气发动机谐振进气管,其特征是:进气歧管上段与谐振腔和第一长方形孔板铸造成一体。 3. The gas engine according to claim 2 resonance intake pipe, characterized in that: the intake manifold section and a first cavity and a rectangular plate integrally cast.
4.根据权利要求3所述的天然气发动机谐振进气管,其特征是:进气歧管下段与发动机缸盖相连接的端口处有一个正方形法兰,进气歧管下段由一段内部为圆孔的弧形段和一段内部由圆孔逐渐转换成方孔的过渡段组成。 A natural gas engine according to claim 3, wherein said resonant intake pipe, characterized in that: an intake manifold port at the lower section of the engine head and connected to a square flange, the lower intake manifold of an internal section of circular the arcuate inner section and a circular section of the transition section gradually converted into a square hole of the composition.
5.根据权利要求1-4任何一项所述的天然气发动机谐振进气管,其特征是:进气总管以圆角与谐振腔圆弧面相连接。 According to any of claims 1-4 resonance gas engine according to the intake pipe, characterized in that: the intake manifold and the resonator in a rounded arc surface connection.
CN 200910072559 2009-07-22 2009-07-22 Resonant intake tube of natural gas engine CN101608587B (en)

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CN102678400A (en) * 2012-06-07 2012-09-19 哈尔滨工程大学 Hydraulic drive continuously variable gas inlet system
CN102678403B (en) * 2012-06-07 2014-11-05 哈尔滨工程大学 Half-moon wedge shaped resonance intake pipe
CN103742318A (en) * 2013-12-23 2014-04-23 广西科技大学 Engine air inlet manifold
CN103742251A (en) * 2013-12-23 2014-04-23 广西科技大学 Variable air inlet system for engine
CN103742317A (en) * 2013-12-23 2014-04-23 广西科技大学 Length variable intake manifold

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US5056473A (en) 1989-05-29 1991-10-15 Honda Giken Kogyo Kabushiki Kaisha Intake device for multi-cylinder internal combustion engine
CN2516722Y (en) 2002-01-24 2002-10-16 萍乡市科尔发动机有限公司 Air intake pipe of four-cylinder multipoint electric control petrol engine
CN2545378Y (en) 2002-06-18 2003-04-16 上汽集团奇瑞汽车有限公司 Air intaking and discharging device for automotive engine

Patent Citations (3)

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Publication number Priority date Publication date Assignee Title
US5056473A (en) 1989-05-29 1991-10-15 Honda Giken Kogyo Kabushiki Kaisha Intake device for multi-cylinder internal combustion engine
CN2516722Y (en) 2002-01-24 2002-10-16 萍乡市科尔发动机有限公司 Air intake pipe of four-cylinder multipoint electric control petrol engine
CN2545378Y (en) 2002-06-18 2003-04-16 上汽集团奇瑞汽车有限公司 Air intaking and discharging device for automotive engine

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