CN101802386B - 燃料泵、尤其是用于活塞内燃机的燃料系统的燃料泵 - Google Patents

燃料泵、尤其是用于活塞内燃机的燃料系统的燃料泵 Download PDF

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CN101802386B
CN101802386B CN200880107509.9A CN200880107509A CN101802386B CN 101802386 B CN101802386 B CN 101802386B CN 200880107509 A CN200880107509 A CN 200880107509A CN 101802386 B CN101802386 B CN 101802386B
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coating
petrolift
shell area
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fuel pump
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CN101802386A (zh
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C·朗根巴赫
M·芬克
A·默茨
J·京特尔特
J·格雷贝
R·雷特塞姆
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Robert Bosch GmbH
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    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
    • F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
    • F02M63/0265—Pumps feeding common rails
    • 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
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
    • F02M59/10—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by the piston-drive
    • F02M59/102—Mechanical drive, e.g. tappets or cams
    • 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
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
    • F02M59/445—Selection of particular materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C2/14—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
    • 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
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/04—Feeding by means of driven pumps
    • F02M37/041—Arrangements for driving gear-type pumps
    • 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
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/04—Feeding by means of driven pumps
    • F02M37/045—Arrangements for driving rotary positive-displacement pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2230/00—Manufacture
    • F04C2230/90—Improving properties of machine parts
    • F04C2230/91—Coating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2201/00—Metals
    • F05C2201/02—Light metals
    • F05C2201/021—Aluminium
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2225/00—Synthetic polymers, e.g. plastics; Rubber
    • F05C2225/08—Thermoplastics
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2225/00—Synthetic polymers, e.g. plastics; Rubber
    • F05C2225/12—Polyetheretherketones, e.g. PEEK
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2253/00—Other material characteristics; Treatment of material
    • F05C2253/22—Reinforcements

Abstract

一种燃料泵(15)包括壳体(20)和在运行中活动的部件(24，26)，所述活动部件至少间接地贴靠在壳体区域(22)上。本发明提出，所述燃料泵(15)包括覆层(28)，该覆层在该壳体区域的面向所述活动部件(24，26)一侧涂覆在所述壳体区域(22)上，并且，该覆层(28)包括塑料。

Description

燃料泵、尤其是用于活塞内燃机的燃料系统的燃料泵
技术领域
本发明涉及一种燃料泵、尤其是用于活塞内燃机的燃料系统的燃料泵。
背景技术
由市场上已知具有高压燃料系统的内燃机，例如柴油或汽油活塞发动机。高压燃料系统又包括燃料高压泵，通过燃料高压泵从燃料容器吸出燃料并且在高压下将燃料输送到一个或多个喷射器。作为燃料高压泵通常使用柱塞泵，该柱塞泵在低压侧例如具有齿轮泵或叶片泵或者由这种泵供给。
这种泵的至少一个在运行中活动的部件、例如齿轮(在齿轮泵的情况下)或者转子(在叶片泵的情况下)侧向地贴靠在燃料泵的壳体区域上，因此所述活动部件在运行中在该壳体区域上沿着滑动。由于重量的原因，已知的燃料高压泵的壳体部分地由铝制成。为了保证所述在运行中活动的部件沿着滑动的那些壳体区域具有足够的耐磨性，这些也被称为“滑动面”的壳体区域例如由钢或灰铸铁制成。
发明内容
按照本发明提出了一种燃料泵，所述燃料泵具有一壳体和至少一个至少间接地贴靠在壳体区域上的且在运行中活动的部件，其中，所述燃料泵包括一覆层，所述覆层在所述壳体区域的面向所述活动部件的一侧涂覆在所述壳体区域上，并且，所述覆层包括塑料，所述塑料是热塑性塑料，所述热塑性塑料通过纤维强化，至少在其上涂覆有所述覆层的所述壳体区域的材料包括铝或者是铝，所述覆层的一个区域被构造成密封区域，所述密封区域与所述壳体的另一个区域配合，其中，所述密封区域包括环绕的密封凸起或环绕的密封唇。
本发明的目的是实现一种燃料高压泵，该燃料高压泵在成本低且结构空间需求小的情况下具有长的使用寿命。
该目的通过具有上述技术方案特征的燃料高压泵实现。在下述说明中给出有利的扩展方案。此外，在下面的说明书和附图中存在对于本发明重要的特征。在此，这些特征不仅单独地而且以不同的组合对于本发明都是重要的，对此没有分别详细地论述。
按照本发明设置的覆层是特别耐磨损的并因此尤其适合于非常好地作为相应的泵类型的旋转部件(例如齿轮或转子)的滑动面。通过省去例如由钢或灰铸铁或类似物(例如铝/镍或阳极氧化铝)制成的单独的滑动面而简化了制造，这导致节省成本。此外，通过省去由钢或灰铸铁制成的作为滑动面的垫板而降低了结构空间需求，也就是说燃料高压泵也具有相对小的尺寸。此外，如果由塑料制成的覆层被直接涂覆在壳体区域上，而不使用经覆层的垫板作为活动部件的滑动面，则省去了对外的密封面，这简化了结构，降低了成本并提高了运行可靠性。
本发明的第一扩展方案规定，所述塑料是热塑性塑料、尤其是聚醚醚酮。这种材料是特别耐磨损的并因此有助于塑料高压泵的高使用寿命。
通过纤维、尤其是碳纤维强化所述热塑性塑料，则能够再次强化所述优点。
至少在其上涂覆有覆层的壳体区域的材料可以包括铝或是铝。铝是可比较容易加工的，这降低了制造成本。此外，铝具有轻的重量，从而使燃料高压泵的重量很小。通过按照本发明设置的由塑料制成的覆层还将磨损保持在很小的程度并且保证在很大程度上由铝制成的燃料高压泵的高使用寿命。
特别有利的是按照本发明的燃料高压泵的这样一种扩展方案，在该扩展方案中所述覆层的一个区域被构造成密封区域，该密封区域与壳体的另一个区域配合。按照本发明设置的由塑料制成的覆层在这种情况下满足双重功能：该覆层除了减小磨损的功能外还满足密封功能。因此，无需单独的密封装置(例如通过O形环)以及与其相关的由设置相应的O形环而引起的切削加工。由此也简化了结构，易于组装，减少了故障源等。
所述密封区域可以包括环绕的密封凸起或环绕的密封唇。这种设计形式可以通过常见的塑料、尤其是通过热塑性塑料容易地制造并且保证了即便高压差下的可靠密封。
由塑料制成的覆层的一种简单制造在于，将所述覆层熔化在所述壳体区域上。
还可能的是，在其上涂覆有覆层的壳体区域包括相对薄的支撑板，该支撑板固定在另一个壳体区域上，优选地与所述另一个壳体区域粘接。这能够在特殊的应用场合中根据所述壳体区域的和/或待密封的区域的有时复杂的几何形状因人而异地且可靠地实现所述结构。
附图说明
下面参照附图详细解释本发明的实施方式。附图中示出：
图1示出活塞内燃机的具有燃料高压泵的燃料系统的示意图；
图2示出图1的燃料高压泵的区域的透视图；
图3示出图2所示的区域的示意性剖视图；和
图4示出一种替代实施形式的与图3类似的视图。
具体实施方式
在图1中，用于活塞内燃机的燃料系统整体上以附图标记10表示。该燃料系统包括燃料容器12，一燃料高压泵14将燃料从该燃料容器输送到高压燃料储存器16(“轨”)。在轨16上连接有多个喷射器18，这些喷射器18将燃料直接喷射到内燃机的与这些喷射器适配的(未示出的)燃烧室中。
所述燃料高压泵14在低压侧包括一齿轮泵15。在未示出的实施例中，所述燃料高压泵在低压侧也可以包括叶片泵或任何其它适合的泵型。该燃料高压泵14连同低压侧的齿轮泵15一起直接地且机械地被内燃机驱动。在一种未示出的实施例中，低压侧的齿轮泵也可以配备单独的驱动装置、例如电机。
在图2中示出燃料高压泵14的齿轮泵15的区域，但是以这样一种状态示出，在该状态中取下了在正常运行中存在的壳体盖。可以看到制成铸件的壳体20，该壳体在各个不同的位置上被切削加工并且包含燃料高压泵14的机械的和流体的部件。所述壳体20由铝制成。壳体区域22被加工成平的面。该壳体区域22用作两个齿轮24和26的滑动面，这两个齿轮在燃料高压泵14和齿轮泵15的运行中反向地旋转。所述齿轮24和26也是在运行中活动的部件，这些活动部件至少间接地贴靠在平的壳体区域22上。
如图3所示，在壳体区域22上涂覆一由塑料制成的、即由热塑性塑料制成的覆层。在图2中以交叉阴影示出该覆层，该覆层以附图标记28表示。该覆层28在该壳体区域的面向这两个齿轮24和26的一侧涂覆在该壳体区域22上，这两个齿轮24和26也贴靠在覆层28上。具体地说，作为覆层28的材料可以考虑聚醚醚酮。该覆层28熔化在壳体区域22上。在一种未示出的实施例中，该覆层可以附加地通过纤维、尤其是碳纤维强化。
如图3所示，所述覆层28在两个齿轮24和26的滑动面以外具有环绕的密封凸起30，该密封凸起30形成密封区域，该密封区域与壳体20的构造成盖32的另一个区域配合。该盖32旋紧在壳体区域22上，其中，在装配中该密封凸起30压缩并由此使位于密封凸起30径向内部的区域对外密封。
在图4中示出一种替代实施方式。在此，与已经描述过的元件和区域具有同等功能的元件和区域以相同的附图标记表示。对这些元件和区域不再详细描述。
与图2和3的实施例不同的是，在其上涂覆有覆层28的壳体区域22包括相对薄的支撑板34，该支撑板与燃料高压泵14的其余壳体36粘接。

Claims (5)

1.燃料泵(15)，所述燃料泵具有一壳体(20)和至少一个至少间接地贴靠在壳体区域(22)上的且在运行中活动的部件(24，26)，其特征在于，所述燃料泵包括一覆层(28)，所述覆层在所述壳体区域的面向所述活动部件(24，26)的一侧涂覆在所述壳体区域(22)上，并且，所述覆层(28)包括塑料，所述塑料是热塑性塑料，所述热塑性塑料通过纤维强化，至少在其上涂覆有所述覆层(28)的所述壳体区域(22)的材料包括铝或者是铝，所述覆层(28)的一个区域被构造成密封区域(30)，所述密封区域与所述壳体(20)的另一个区域(32)配合，其中，所述密封区域包括环绕的密封凸起(40)或环绕的密封唇。
2.如权利要求1所述的燃料泵(15)，其特征在于，所述覆层(28)熔化在所述壳体区域(22)上。
3.如权利要求1或2所述的燃料泵(15)，其特征在于，在其上涂覆有所述覆层(28)的所述壳体区域(22)包括相对薄的支撑板(34)，所述支撑板固定在另一个壳体区域(36)上。
4.如权利要求1所述的燃料泵(15)，其特征在于，所述燃料泵(15)是用于活塞内燃机的燃料系统(10)的燃料泵，所述塑料是聚醚醚酮，所述热塑性塑料通过碳纤维强化。
5.如权利要求3所述的燃料泵(15)，其特征在于，所述支撑板与所述另一个壳体区域粘接。
CN200880107509.9A 2007-09-18 2008-09-01 燃料泵、尤其是用于活塞内燃机的燃料系统的燃料泵 Expired - Fee Related CN101802386B (zh)

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DE102007044499.2 2007-09-18
DE102007044499A DE102007044499A1 (de) 2007-09-18 2007-09-18 Kraftstoffpumpe, insbesondere für ein Kraftstoffsystem einer Kolben-Brennkraftmaschine
PCT/EP2008/061470 WO2009037100A1 (de) 2007-09-18 2008-09-01 Kraftstoffpumpe, insbesondere für ein kraftstoffsystem einer kolben-brennkraftmaschine

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DE102010001121A1 (de) * 2010-01-22 2011-07-28 Robert Bosch GmbH, 70469 Kraftstoffeinspritzsystem und Verfahren zum Steuern einer Kraftstoffpumpe
DE102010041213A1 (de) * 2010-09-22 2012-03-22 Robert Bosch Gmbh Hochdruckpumpe und Verfahren zum Herstellen eines Pumpengehäuses
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EP2201239B1 (de) 2017-04-12
CN101802386A (zh) 2010-08-11
JP2010539385A (ja) 2010-12-16
DE102007044499A1 (de) 2009-03-19
RU2010115180A (ru) 2011-10-27
RU2492348C2 (ru) 2013-09-10
WO2009037100A1 (de) 2009-03-26
EP2201239A1 (de) 2010-06-30
KR20100058564A (ko) 2010-06-03
US20100192921A1 (en) 2010-08-05
JP5232237B2 (ja) 2013-07-10

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