CN100385107C - 用于内燃机的燃料喷射装置的燃料配量单元 - Google Patents
用于内燃机的燃料喷射装置的燃料配量单元 Download PDFInfo
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- F16K31/00—Actuating devices; Operating means; Releasing devices
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- F02M63/0012—Valves
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- 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
- F02M63/0012—Valves
- F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
- F02M63/004—Sliding valves, e.g. spool valves, i.e. whereby the closing member has a sliding movement along a seat for opening and closing
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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
- F02M63/0012—Valves
- F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
- F02M63/004—Sliding valves, e.g. spool valves, i.e. whereby the closing member has a sliding movement along a seat for opening and closing
- F02M63/0042—Sliding valves, e.g. spool valves, i.e. whereby the closing member has a sliding movement along a seat for opening and closing combined with valve seats of the lift valve type
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- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0603—Multiple-way valves
- F16K31/061—Sliding valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0603—Multiple-way valves
- F16K31/0624—Lift valves
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- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
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Abstract
本发明涉及用于内燃机的燃料喷射装置的燃料配量单元,具有电磁铁(10)操作的、带有阀活塞(25)的调节阀(11),阀活塞(25)在阀壳体(22)中被导向,阀活塞(25)构造成套筒状及在其内腔(26)中接收一个使其保持紧贴在衔铁杆(14)上的压簧(27),压簧(27)的后侧支撑在设置在阀壳体(22)的阀孔(24)中的弹簧座上,在阀壳体(22)的壁中设有至少一个径向控制孔(32),它们这样成形和/或布置,即流过燃料配量单元的燃料量可与阀活塞(25)的行程相关地调节。在该阀活塞(25)的内腔(26)中设有一个闭塞套筒(51)且该阀活塞(25)与该闭塞套筒(51)构成一个闭塞装置。密封性在零位输送工况时得到改善且简化了制造及装配。
Description
现有技术
本发明涉及用于内燃机的燃料喷射装置的燃料配量单元。
背景技术
在由DE 198 53 103 A1公知的燃料配量单元中弹簧座在轴向上设置在阀活塞的后面。在DE 198 53 103 A1的图8上所述的实施例中,在阀盘上可设置一个轴向密封座。在调节阀的闭合位置中,阀活塞靠置到轴向密封座上并由此密封地闭塞调节阀,以致无燃料通过燃料配量单元到达燃料高压泵。
发明内容
根据本发明,提出一种用于内燃机的燃料喷射装置的燃料配量单元,该内燃机具有一个与发动机转速相关地驱动的高压泵,其中燃料配量单元具有一个由电磁铁操作的、带有一个阀活塞的调节阀,其中该阀活塞在一个阀壳体中被导向,其中该阀活塞被构造成套筒状及在其内腔中接收一个使其保持紧贴在衔铁杆上的压簧,其中压簧的后侧支撑在一个设置在阀壳体的阀孔中的弹簧座上,其中在阀壳体的壁中设有至少一个径向的控制孔,它们被这样地成形和/或布置,即流过燃料配量单元的燃料量可与阀活塞的行程相关地调节,其中:在该阀活塞的内腔中设有一个闭塞套筒且该阀活塞与该闭塞套筒构成一个闭塞装置。
在根据本发明的用于内燃机的燃料喷射装置的燃料配量单元中,提出:在阀活塞的内腔中设有一个闭塞套筒并且阀活塞与该闭塞套筒构成一个截止阀(Absperrventil)。
通过将闭塞阀组合到阀活塞的内部,降低了配量单元的结构长度,并且除此以外,轴向密封座的直径与由现有技术公知的环形间隙密封的直径相比显著地减小。因此,根据本发明的燃料配量单元在调节阀的闭合位置中大大改善了向高压泵的燃料输送的闭塞。
因此可不用附加的措施来避免当内燃机减速加速操作(Schiebebetrieb)、如零位输送节流(Nullfoerderdrossel)时不希望的压力建立或不用在高压泵的压力侧上使用第二压力调节阀。这有助于在很大的范围上节省成本。
被证实特别有利的是,闭塞阀被构造成球阀,和/或在闭塞套筒与阀活塞之间设有一个球,其中闭塞套筒具有一个密封座。
通过使用球阀简化了制造,因为球可补偿同轴度误差及角度误差,这些在制造时几乎是不可避免的。
为了保证使球始终位于为其设置的位置上,在根据本发明的另一构型中,阀活塞具有一个球保持架,该球保持架将球保持在一个相对阀活塞确定的位置上。
为了进一步简化根据本发明的燃料配量单元的制造及装配还提出,弹簧座组合到闭塞套筒上。这例如可如下地实现:在闭塞套筒中开设一个环形槽,它用于固定压簧。
由此进一步减小了部件的数目及根据本发明的燃料配量单元的结构长度。此外可以通过闭塞套筒在阀孔中的轴向移动及随后的固定来实现对调节阀调节。当弹簧座及闭塞套筒为两个不同的部件时,当每个调节阀开始运转之前,不仅弹簧座的轴向位置而且闭塞套筒的轴向位置均必须被调节,这意味着提高成本及时间消耗。
本发明的其它优点及有利的构型从以下的附图、附图说明及权利要求书中可以得到。
附图说明
附图表示:
图1燃料配量单元的一个实施形式的垂直纵截面,及
图2图1中细节部分“A”的放大视图。
具体实施方式
根据图1的燃料配量单元是基于一个带有整体组合的调节阀11的电磁铁10。详细地说,该电磁铁10由一个电磁线圈12、一个带有衔铁杆14的衔铁13及一个电磁铁杯形件15组成,该电磁铁杯形件部分地包围着电磁线圈12及衔铁13。
具有整体组合的调节阀11的电磁铁10的整个结构单元被设置在一个(未示出)的燃料高压泵中。电磁铁杯形件15在此同时用作密封部件、磁轭及电磁铁10在高压泵中的固定部件(见标号16)。
电磁线圈12在其装入电磁铁杯形件15中后被完全地压力注塑包封。通过由标号17标示的压力注塑包封部分保证了由线圈12到电磁铁杯形件15的最佳热传导。由此可抵抗在苛刻工作条件下的过热。此外该压力注塑包封部分17导致了良好的疲劳强度及抗振强度,由此允许燃料配量单元10,11固定在就振动、热负荷及环境负荷来说高负荷的位置上,例如在燃料高压泵上。
此外,通过电磁线圈12的压力注塑包封部分17与两个密封位置18,19的共同作用保证了线圈12相对接插片的接触位置保持“干燥”。因此电磁线圈绕组及接触位置得到最佳保护,以免腐蚀介质的侵蚀。
为了检查压力注塑包封部分17对电磁线圈12的完全包封,在电磁铁杯形件15的圆周上设有“溢流孔”20、21。
调节阀11具有一个阀壳体22,该阀壳体过渡到一个法兰盘状的展宽部分23,该展宽部分同时构成电磁铁杯形件15的端侧封闭件。在阀壳体22中构造有一个阀孔24,该阀孔与电磁铁10的衔铁杆14同轴地布置。在该阀孔24中接收一个可移动的套筒状的阀活塞25,在该阀活塞的内腔26中设有一个压簧27、一个闭塞套筒51及一个球52。
图2表示内空间26的一个详细视图,借助它将阐明所述的、压力调节阀11的各部件的相互作用。
压簧27的前侧支撑在一个球保持架54上且其后侧支撑在闭塞套筒51的一个环形槽29中。闭塞套筒51例如通过压入配合固定在阀孔24中。
球保持架54通过球52支撑在阀活塞25的底部28上且由此使阀活塞25靠置在衔铁杆14的前端。
在图1中所示的阀活塞25的位置中,闭塞套筒51的孔31将阀活塞25的内腔26与燃料喷射系统的一个(未示出的)前置输送泵相连接。
在阀壳体22中还设有多个径向地定向的控制孔,由图1可看到它们中的两个且用标号32标示。这些控制孔32与(未示出的)高压泵的低压区域形成液压的有效连接。在阀活塞25中设有多个径向孔34,这些孔与阀壳体22中的那些控制孔32共同起作用。
图1表示调节阀11处于打开状态中,其中控制孔32与阀活塞25中的孔34具有液压的连接。在该位置中,电磁铁10未通过电流且压簧27使阀活塞25处于图1中所示的位置上。
在图1中所示的调节阀11的打开位置中,在标号31处输入调节阀11的燃料穿过闭塞套筒51,在该闭塞套筒端部逆转它的流动方向并通过阀活塞25中的孔34与阀壳体22中的控制孔32向着未示出的向压泵的方向上流动。
如上所述,在实践中被证实合乎目标的是:在阀壳体22的圆周上不仅仅设置一个,而是设置多个分布在该圆周上的径向控制孔32。在DE 198 53 103 A1中详细地描述了控制孔32的构型。该描述将结合与此作为参考。
在机动车的推进运行(Schubbetrieb)中,调节阀11必需被密封地关闭,以防止像在减速超速操作中一样调节阀向高压泵中泄漏燃料。调节阀11的这种燃料泄漏导致不希望的高压泵的燃料输送并由此导致燃料喷射系统的共轨中的压力升高。随着共轨中的压力升高可导致减速超速操作期间不希望的噪音扩展(“硬燃烧噪音”)。
为了保证调节阀11的密封度,在阀活塞25中组合了一个基本上由闭塞套筒51及球52组成的闭塞装置。以下将借助图2来描述该闭塞装置的功能,图2表示图1的一个放大的局部。
如由图2中可看到的,在闭塞套筒51上构造了一个密封座53,在调节阀11的闭合位置(未示出)中,球52紧靠在该密封座53上。球52由衔铁杆14通过阀活塞27的底部28压到密封座53上。因此孔31与控制孔32之间的液压连接被阻断。衔铁杆14抵抗压簧27的调节运动通过电磁铁10的、与所需调节力相应的电流来实现。该调节运动在图中通过箭头35来表示。当球52靠置在闭塞套筒51的密封座53上时,调节阀11被封闭。
通过对电磁铁10的适当控制,阀活塞25可被调节到所示位置及未示出的闭合位置之间的任意中间位置上。在这些中间位置(未示出)上,调节阀11调节由高压泵(未示出)吸出的燃料量及由此调节高压泵的输送功率。
球阀的优点已由现有技术充分地公知,由此无需详细说明。但在本发明方面重要的是,密封座53的直径D相对地小,由此在衔铁杆14相对小的压紧力的情况下就可得到球52与闭塞套筒51的密封座53之间高的表面压力。这便提高了根据本发明的截止阀的密封性。
当从调节阀11的未示出的闭合位置出发减小衔铁杆14的电流,则压簧27使阀活塞25向着衔铁杆14的方向上运动,以致球52将从密封座53上抬起。在此情况下,球52通过球保持架54从密封座53上抬起。因此球52相对阀活塞25总是具有一个确定的位置且不会在阀活塞25的底部28与密封座53之间来回地运动。该来回运动对于调节阀11的调节品质是不利的。
在调节阀11中流过燃料的方向也可逆转。在此情况下孔31与高压泵的低压区域形成液压连接,而控制孔32与预输送泵的压力侧相连接且由此形成对配量单元的输入。
在燃料配量单元首次投入工作前需要对调节阀11进行一次调节。这种调节可通过闭塞套筒51在阀孔24中相应的轴向移动及接着将其固定来实现。该调节过程将详细地如下进行:
首先对电磁铁10加载确定的电流。接着使闭塞套筒51如此深地插入到阀孔24中,以使得一个确定的体积流量通过控制孔32流动。在该位置中将闭塞套筒51固定在阀孔24中,其方式例如使闭塞套筒51构造成压入配合件或使阀壳体22向外弹性地变形。有利的是,阀调节点被设置到最小流量区域中,因为由此可精确地调节对容差敏感的空载区域。
对调节阀11进行调节的同时,也可确定密封座53相对阀活塞25的底部28及球52的轴向位置。由此可保证:在阀活塞25的闭合位置中,球关闭闭塞套筒51及由此燃料不能通过控制孔32。通过在闭塞套筒中组合环形槽可使必需的调节过程减小到1次,这便显著地降低了配量单元的制造成本。
Claims (8)
1.用于内燃机的燃料喷射装置的燃料配量单元,该内燃机具有一个与发动机转速相关地驱动的高压泵,其中燃料配量单元具有一个由电磁铁(10)操作的、带有一个阀活塞(25)的调节阀(11),其中该阀活塞(25)在一个阀壳体(22)中被导向,其中该阀活塞(25)被构造成套筒状及在其内腔(26)中接收一个使其保持紧贴在衔铁杆(14)上的压簧(27),其中压簧(27)的后侧支撑在一个设置在阀壳体(22)的阀孔(24)中的弹簧座上,其中在阀壳体(22)的壁中设有至少一个径向的控制孔(32),它们被这样地成形和/或布置,即流过燃料配量单元的燃料量可与阀活塞(25)的行程相关地调节,其特征在于:在该阀活塞(25)的内腔(26)中设有一个闭塞套筒(51)且该阀活塞(25)与该闭塞套筒(51)构成一个闭塞装置。
2.根据权利要求1的燃料配量单元,其特征在于:该闭塞装置被构造成球阀(52,53)。
3.根据权利要求2的燃料配量单元,其特征在于:在该闭塞套筒(51)与该阀活塞(25)之间设有一个球(52)且该闭塞套筒(51)具有一个密封座(53)。
4.根据权利要求2或3的燃料配量单元,其特征在于:该阀活塞(25)具有一个球保持架(54)且该球保持架(54)将球(52)保持在一个相对阀活塞(25)确定的位置上。
5.根据权利要求1至3之一的燃料配量单元,其特征在于:压簧(27)的一端支撑在闭塞套筒(51)上。
6.根据权利要求5的燃料配量单元,其特征在于:在该闭塞套筒(51)中设有一个环形槽(29)或导向环圈,用于接收压簧(27)。
7.根据权利要求1至3之一的燃料配量单元,其特征在于:该调节阀(11)可通过闭塞套筒(51)在阀孔(24)中的相应的轴向移动及接着的固定被调节。
8.根据权利要求1至3之一的燃料配量单元,其特征在于:在阀壳体(22)的壁中设有多个径向的控制孔(32)。
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DE10251014.8 | 2002-11-02 | ||
DE2002151014 DE10251014A1 (de) | 2002-11-02 | 2002-11-02 | Kraftstoffzumesseinheit für Kraftstoffeinspritzanlagen von Brennkraftmaschinen |
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CN100385107C true CN100385107C (zh) | 2008-04-30 |
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US (1) | US7398764B2 (zh) |
EP (1) | EP1561026B1 (zh) |
JP (1) | JP4358744B2 (zh) |
CN (1) | CN100385107C (zh) |
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DE102007016134A1 (de) * | 2006-04-25 | 2007-11-08 | Robert Bosch Gmbh | Kraftstoff-Hochdruckpumpe |
JP4353288B2 (ja) * | 2007-08-08 | 2009-10-28 | トヨタ自動車株式会社 | 燃料ポンプ |
IT1396189B1 (it) * | 2009-10-02 | 2012-11-16 | Bosch Gmbh Robert | Unita' di mandata per per alimentare combustibile a un motore a combustione interna. |
KR100934585B1 (ko) | 2009-10-07 | 2009-12-31 | 주식회사 유니크 | Gdi 엔진의 고압펌프용 솔레노이드 밸브 |
DE102010039691A1 (de) | 2009-12-01 | 2011-06-09 | Robert Bosch Gmbh | Schaltvenitl, insbesondere zur Zumessung eines Fluids für eine stromabwärts angeordnete Förderpumpe |
DE102009055356A1 (de) * | 2009-12-29 | 2011-06-30 | Robert Bosch GmbH, 70469 | Elektromagnetisch betätigtes Mengensteuerventil, insbesondere zur Steuerung der Fördermenge einer Kraftstoff-Hochdruckpumpe |
JP5012922B2 (ja) | 2010-02-03 | 2012-08-29 | 株式会社デンソー | 高圧ポンプ |
GB2487542B (en) * | 2011-01-25 | 2013-06-12 | Vector Int Ltd | ROV drive bucket plug |
DE102011005485A1 (de) * | 2011-03-14 | 2012-09-20 | Robert Bosch Gmbh | Ventileinrichtung zum Schalten oder Zumessen eines Fluids |
US8550167B2 (en) * | 2011-03-21 | 2013-10-08 | Vetco Gray Inc. | Remote operated vehicle interface with overtorque protection |
DE102011085257A1 (de) * | 2011-10-26 | 2013-05-02 | Robert Bosch Gmbh | Magnetventil sowie Verfahren zur Montage eines Magnetventils |
DE102012107764A1 (de) | 2012-08-23 | 2014-04-10 | Kendrion (Villingen) Gmbh | Common-Rail-System |
DE102013225162A1 (de) | 2013-12-06 | 2015-06-11 | Robert Bosch Gmbh | Elektromagnetisch betätigtes Ventil |
US9739203B2 (en) * | 2014-05-15 | 2017-08-22 | Hamilton Sundstrand Corporation | Fuel metering valve and method of managing fuel in a metering valve |
DE102014217375A1 (de) * | 2014-09-01 | 2016-03-03 | Robert Bosch Gmbh | Elektromagnetisch betätigbares Expansionsventil |
DE102014220222A1 (de) * | 2014-10-07 | 2016-04-07 | Robert Bosch Gmbh | Elektromagnetisch betätigbares Proportionalventil |
JP6531633B2 (ja) * | 2015-11-23 | 2019-06-19 | 浜名湖電装株式会社 | 電磁弁 |
WO2019065998A1 (ja) * | 2017-09-29 | 2019-04-04 | 株式会社デンソー | 高圧ポンプ |
JP6708238B2 (ja) * | 2017-09-29 | 2020-06-10 | 株式会社デンソー | 高圧ポンプ |
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- 2003-07-18 JP JP2004549044A patent/JP4358744B2/ja not_active Expired - Fee Related
- 2003-07-18 WO PCT/DE2003/002420 patent/WO2004042225A1/de active Application Filing
- 2003-07-18 CN CNB038249472A patent/CN100385107C/zh not_active Expired - Fee Related
- 2003-07-18 US US10/532,972 patent/US7398764B2/en not_active Expired - Fee Related
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JP4358744B2 (ja) | 2009-11-04 |
EP1561026B1 (de) | 2013-04-10 |
US20060042600A1 (en) | 2006-03-02 |
US7398764B2 (en) | 2008-07-15 |
DE10251014A1 (de) | 2004-05-19 |
JP2006504899A (ja) | 2006-02-09 |
CN1695005A (zh) | 2005-11-09 |
WO2004042225A1 (de) | 2004-05-21 |
EP1561026A1 (de) | 2005-08-10 |
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