WO2021062600A1 - 发动机燃油系统及具有其的发动机 - Google Patents
发动机燃油系统及具有其的发动机 Download PDFInfo
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- WO2021062600A1 WO2021062600A1 PCT/CN2019/109375 CN2019109375W WO2021062600A1 WO 2021062600 A1 WO2021062600 A1 WO 2021062600A1 CN 2019109375 W CN2019109375 W CN 2019109375W WO 2021062600 A1 WO2021062600 A1 WO 2021062600A1
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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
- 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
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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
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
Definitions
- the invention belongs to the technical field of engines, and in particular relates to an engine fuel system and an engine having the same.
- the fuel injection pump outputs high-pressure fuel, which is delivered to the fuel injector through the high-pressure fuel pipe. Because the whole machine is too long, the high-pressure oil pipe is a series structure, if a certain injector or high-pressure oil pipe leaks, the pressure of the entire system will decrease, and the engine will stop because of this.
- the purpose of the present invention is to at least solve the problem in the prior art that a certain injector or high-pressure oil pipe leaks, which leads to a decrease in system pressure and thus to an engine shutdown.
- the purpose is achieved through the following technical solutions:
- the first aspect of the present invention provides an engine fuel system, including:
- a fuel injection pump which is used to deliver fuel in a fuel tank
- a fuel pipeline the fuel pipeline is connected to the fuel injection pump
- the fuel injector group includes a plurality of the fuel injectors connected in series to the fuel pipeline, and the fuel injection pump can draw fuel from the first fuel injector group through the fuel pipeline. End and second end supply;
- a number of restriction valves are provided at both ends of the connection node between the fuel pipeline and each of the injectors, and the outlet of the restriction valve faces the connection node, when passing through the restriction
- the flow restriction valve is closed when the flow rate of the valve exceeds the restriction flow rate of the flow restriction valve.
- a restrictor valve is provided at both ends of the connecting node of the fuel injector and the fuel pipeline.
- the flow rate in the fuel pipeline exceeds the restrictive flow rate of the restrictor valve.
- the restrictor valve is automatically closed, the faulty fuel line or injector will stop leaking, and other injectors can continue to work under the two-way fuel supply arrangement. Avoid engine shutdown due to lack of a cylinder to work.
- engine fuel system proposed according to the present invention may also have the following additional technical features:
- the top of the fuel injector is provided with a three-way structure, and the first end of the three-way structure is connected to the outlet of the restrictor valve at one end of the connection node of the fuel injector. Connected, the second end of the three-way structure is connected to the outlet of another restrictor valve at the other end of the fuel injector connection node, and the third end of the three-way structure is connected to the fuel injector.
- the inlet connection of the device is provided with a three-way structure, and the first end of the three-way structure is connected to the outlet of the restrictor valve at one end of the connection node of the fuel injector.
- the second end of the three-way structure is connected to the outlet of another restrictor valve at the other end of the fuel injector connection node, and the third end of the three-way structure is connected to the fuel injector.
- the inlet connection of the device is provided with a three-way structure, and the first end of the three-way structure is connected to the outlet of the restrictor valve at one end of the
- the restrictor valve is provided at the outlet of the fuel injection pump, the inlet of the restrictor valve is connected to the outlet of the fuel injection pump, and the outlet of the restrictor valve is connected to the outlet of the fuel injection pump. Fuel line connection.
- the restrictor valve is a mechanical restrictor valve.
- the second aspect of the present invention provides an engine having the engine fuel system proposed in the first aspect of the present invention.
- the engine proposed by the present invention has the above-mentioned engine fuel system, which can block the oil leakage through the restrictor valves at both ends of the fuel injector when the fuel pipeline or the fuel injector leaks, and prevent the engine from leaking caused by a certain fuel injector or fuel pipe.
- the system pressure drops and stops.
- Fig. 1 schematically shows a schematic diagram of an engine fuel system according to an embodiment of the present invention
- Fig. 2 schematically shows a schematic diagram of an engine fuel system according to an embodiment of the present invention
- spatial relative terms may be used in the text to describe the relationship of one element or feature relative to another element or feature as shown in the figure. These relative terms are, for example, “inner”, “outer”, and “inner”. “, “outside”, “below”, “below”, “above”, “above”, etc.
- This spatial relationship term is intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure is turned over, then elements described as “below other elements or features” or “below the other elements or features” will then be oriented as “above the other elements or features" or “below the other elements or features" Above features”. Therefore, the example term “below” can include an orientation of above and below.
- the device can be otherwise oriented (rotated by 90 degrees or in other directions) and the spatial relative relationship descriptors used in the text are explained accordingly.
- the first aspect of the present invention proposes an engine fuel system, including:
- Fuel injection pump 10 which is used to deliver fuel in the fuel tank
- the fuel line 20 is connected to the fuel injection pump 10;
- the fuel injector group 40 includes a number of fuel injectors 4011 connected in series to the fuel line 20.
- the fuel injection pump 10 is capable of delivering fuel from the first end and the second end of the fuel injector group 40 through the fuel line 20. Supply
- a number of restrictor valves 30, two ends of the connecting node 50 between the fuel pipeline 20 and each injector 401 are provided with restrictor valves 30, and the outlet of the restrictor valve 30 faces the connecting node 50.
- the fuel injection pump 10 is used to supply the fuel in the fuel tank from the two ends of the fuel injector group 40 through the fuel pipeline 20 to realize the bidirectional fuel supply of the fuel injector 4011.
- the engine fuel system proposed by the present invention also has the function of preventing leakage.
- the two ends of the connection node 50 between the fuel injector 4011 and the fuel pipeline 20 are provided with a restrictor valve 30.
- the fuel injector 4011 or two fuel injectors 4011 are connected When the fuel line 20 leaks, for example, if a certain injector 4011 leaks, the fuel flow through the restrictor valve 30 at both ends of the injector 4011 will increase. When the fuel flow exceeds the limit of the restrictor valve 30 When the flow value is limited, the flow limiting valve 30 is automatically closed, and the fuel supplied to the fuel injector 4011 will be cut off to realize the anti-leakage function of the system.
- the flow rate of the fuel line 20 between the two injectors 4011 leaks, the flow rate of the fuel line 20 will increase, and the flow rate will exceed the limit of the connection between the first end and the second end of the fuel line.
- the flow restriction valve 30 is automatically closed to cut off the section of the fuel pipeline 20 to prevent leakage.
- the engine fuel system proposed by the present invention is applicable to various types of engines, including V-type engines.
- the top of the fuel injector 401 is provided with a three-way structure 60, and the first end of the three-way structure 60 is connected to the outlet of the restrictor valve 30 at one end of the fuel injector 401 connected to the node 50, The second end of the three-way structure 60 is connected to the outlet of another restrictor valve 30 at the other end of the connection node 50 of the fuel injector 401, and the third end of the three-way structure 60 is connected to the inlet of the fuel injector 401.
- the outlet of the fuel injection pump 10 is provided with a restrictor valve 30, the inlet of the restrictor valve 30 is connected with the outlet of the fuel injection pump 10, and the outlet of the restrictor valve 30 is connected with the fuel pipeline 20.
- the restrictor valve 30 can be cut off in time to prevent the system pressure from decreasing and affecting the engine.
- the restrictor valve 30 is a mechanical restrictor valve.
- the mechanical restrictor valve has a simple and reliable structure and is more durable.
- the restrictor valve 30 can also be an electronic restrictor valve equipped with a flow sensor, so that the metering is more accurate.
- the second aspect of the present invention provides an engine having the engine fuel system proposed in the first aspect of the present invention.
- the engine proposed in the present invention also has the beneficial effects of the engine fuel system proposed in the first aspect of the present invention, which can prevent a certain cylinder of the engine from shutting down due to oil leakage, which will not be repeated here.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
一种发动机燃油系统，包括：用于输送油箱中的燃油的喷油泵（10）、用于连接喷油泵（10）与喷油器（401）的燃油管路（20）、串联在燃油管路（20）上的若干喷油器（401）、设于燃油管路（20）与每个喷油器（401）连接节点的两端的若干限流阀（30）。限流阀（30）的出口朝向连接节点，限流阀设有预设限制流量，当经过限流阀的流量超过预设限制流量时限流阀关闭，故障高压油管或喷油器将停止泄露，其他喷油器在双向供油的布置下仍可以继续工作，避免了发动机因缺少一个气缸工作而停机。还公开了一种具有该燃油系统的发动机。
Description
本发明属于发动机技术领域，具体涉及一种发动机燃油系统、具有其的发动机。
本部分提供的仅仅是与本公开相关的背景信息，其并不必然是现有技术。
在目前的发动机高压燃油系统中，喷油泵输出高压燃油，通过高压油管输送给喷油器。基于整机过长，高压油管为串联结构，如果某个喷油器或高压油管泄露将导致整个系统压力降低，发动机因此而停车。
发明内容
本发明的目的是至少解决现有技术中某个喷油器或高压油管泄露导致系统压力降低进而导致发动机停车的问题，该目的是通过以下技术方案实现的：
本发明的第一方面提出了一种发动机燃油系统，包括：
喷油泵，所述喷油泵用于输送油箱中的燃油；
燃油管路，所述燃油管路与所述喷油泵连接；
喷油器组，所述喷油器组包括串联于所述燃油管路的若干所述喷油器，所述喷油泵能够通过所述燃油管路将燃油从所述喷油器组的第一端和第二端供入；
若干限流阀，在所述燃油管路与每个所述喷油器连接节点的两端均设有所述限流阀，所述限流阀的出口朝向连接节点，当经过所述限流阀的流量超过所述限流阀的限制流量时所述限流阀关闭。
本发明提出的发动机燃油系统，在喷油器与燃油管路的连接节点的两端设有限流阀，当燃油管路或喷油器泄露时，燃油管路内流量超过限流阀的限制流量，限流阀自动关闭，故障燃油管路或喷油器将停止泄露，其他喷油器在双向供油的布置下仍可以继续工作。避免了发动机因缺少一个气缸工作而停机。
另外，根据本发明提出的发动机燃油系统，还可具有如下附加的技术特征：
在本发明的一些实施例中，所述喷油器的顶部设有三通结构，所述三通结构的第一端与位于所述喷油器连接节点的一端处的所述限流阀的出口连接，所述三通结构的第二端与位于所述喷油器连接节点的另一端处的另一个所述限流阀的出口连接，所述三通结构的第三端与所述喷油器的入口连接。
在本发明的一些实施例中，所述喷油泵的出口处设有所述限流阀，所述限流阀的入口与所述喷油泵的出口连接，所述限流阀的出口与所述燃油管路连接。
在本发明的一些实施例中，所述限流阀为机械式限流阀。
本发明的第二方面提出了一种发动机，具有本发明的第一方面提出的发动机燃油系统。
本发明提出的发动机具有上述发动机燃油系统，能够在燃油管路或者喷油器泄漏时通过喷油器两端的限流阀将漏油处阻断，防止发动机因某一喷油器或油管泄露导致系统压力降低而停车。
通过阅读下文优选实施方式的详细描述，各种其他的优点和益处对于本领域普通技术人员将变得清楚明了。附图仅用于示出优选实施方式的目的，而并不认为是对本发明的限制。而且在整个附图中，用相同的附图标记表示相同的部件。在附图中：
图1示意性地示出了根据本发明实施方式的发动机燃油系统的示意图；
图2示意性地示出了根据本发明实施方式的发动机燃油系统的示意图；
附图中各标记表示如下：
10：喷油泵、20：燃油管路、30：限流阀、40：喷油器组、401：喷油器、50：连接节点、60：三通结构；
下面将参照附图更详细地描述本公开的示例性实施方式。虽然附图中显示了本公开的示例性实施方式，然而应当理解，可以以各种形式实现本公开而不应被这里阐述的实施方式所限制。相反，提供这些实施方式是为了能够更透彻 地理解本公开，并且能够将本公开的范围完整的传达给本领域的技术人员。
应理解的是，文中使用的术语仅出于描述特定示例实施方式的目的，而无意于进行限制。除非上下文另外明确地指出，否则如文中使用的单数形式“一”、“一个”以及“所述”也可以表示包括复数形式。术语“包括”、“包含”、“含有”以及“具有”是包含性的，并且因此指明所陈述的特征、步骤、操作、元件和/或部件的存在，但并不排除存在或者添加一个或多个其它特征、步骤、操作、元件、部件、和/或它们的组合。文中描述的方法步骤、过程、以及操作不解释为必须要求它们以所描述或说明的特定顺序执行，除非明确指出执行顺序。还应当理解，可以使用另外或者替代的步骤。
尽管可以在文中使用术语、第二、第三等来描述多个元件、部件、区域、层和/或部段，但是，这些元件、部件、区域、层和/或部段不应被这些术语所限制。这些术语可以仅用来将一个元件、部件、区域、层或部段与另一区域、层或部段区分开。除非上下文明确地指出，否则诸如“”、“第二”之类的术语以及其它数字术语在文中使用时并不暗示顺序或者次序。因此，以下讨论的元件、部件、区域、层或部段在不脱离示例实施方式的教导的情况下可以被称作第二元件、部件、区域、层或部段。
为了便于描述，可以在文中使用空间相对关系术语来描述如图中示出的一个元件或者特征相对于另一元件或者特征的关系，这些相对关系术语例如为“内部”、“外部”、“内侧”、“外侧”、“下面”、“下方”、“上面”、“上方”等。这种空间相对关系术语意于包括除图中描绘的方位之外的在使用或者操作中装置的不同方位。例如，如果在图中的装置翻转，那么描述为“在其它元件或者特征下面”或者“在其它元件或者特征下方”的元件将随后定向为“在其它元件或者特征上面”或者“在其它元件或者特征上方”。因此，示例术语“在……下方”可以包括在上和在下的方位。装置可以另外定向(旋转90度或者在其它方向)并且文中使用的空间相对关系描述符相应地进行解释。
如图1至图3所示，本发明的第一方面提出了一种发动机燃油系统，包括：
喷油泵10，喷油泵10用于输送油箱中的燃油；
燃油管路20，燃油管路20与喷油泵10连接；
喷油器组40，喷油器组40包括串联于燃油管路20的若干喷油器4011，喷 油泵10能够通过燃油管路20将燃油从喷油器组40的第一端和第二端供入；
若干限流阀30，燃油管路20与每个喷油器401的连接节点50的两端设有限流阀30，限流阀30的出口朝向连接节点50，当经过限流阀30的流量超过限流阀30的限制流量时限流阀30关闭。
本发明提出的发动机燃油系统，使用喷油泵10将油箱中的燃油经燃油管路20从喷油器组40的两端供入，实现喷油器4011的双向供油。
本发明提出的发动机燃油系统还具有防泄漏的功能，在喷油器4011与燃油管路20连接节点50的两端设有限流阀30，当喷油器4011或者两个喷油器4011之间的燃油管路20发生泄漏时，例如，某个喷油器4011发生泄露，通过该喷油器4011两端的限流阀30的燃油流量则会增大，当该燃油流量超过限流阀30的限制流量值时，限流阀30自动关闭，供入该喷油器4011的燃油将被切断，实现系统的防泄漏功能。另外，当两个喷油器4011之间的燃油管路20发生泄漏时，该段燃油管路20的流量将增大，流量超过该段燃油管路的第一端和第二端连接的限流阀30的限制流量时，限流阀30自动关闭，切断该段燃油管路20，实现防泄漏。
本发明提出的发动机燃油系统适用于多种类型的发动机，包括V型发动机。
在本发明的一些实施例中，喷油器401的顶部设有三通结构60，三通结构60的第一端与位于喷油器401连接节点50的一端处的限流阀30的出口连接，三通结构60的第二端与位于喷油器401连接节点50的另一端处的另一个限流阀30的出口连接，三通结构60的第三端与喷油器401的入口连接。
在本发明的一些实施例中，喷油泵10的出口处设有限流阀30，限流阀30的入口与喷油泵10的出口连接，限流阀30的出口与燃油管路20连接。当喷油泵30到距离喷油泵30最近的喷油器401这段燃油管路20泄露时，限流阀30能够及时切断，防止系统压力降低而影响发动机。
在本发明的一些实施例中，限流阀30为机械式限流阀。机械式限流阀结构简单可靠，更耐用。限流阀30还可以是设有流量传感器的电子限流阀，计量更精准。
本发明的第二方面提出了一种发动机，具有本发明的第一方面提出的发动机燃油系统。
本发明提出的发动机同样具有本发明的第一方面提出的发动机燃油系统的有益效果，能够避免发动机的某一气缸因漏油不能工作时而停机，在此不再赘述。
以上，仅为本发明较佳的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到的变化或替换，都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应以权利要求的保护范围为准。
Claims (5)
- 一种发动机燃油系统，其特征在于，包括：喷油泵，所述喷油泵用于输送油箱中的燃油；燃油管路，所述燃油管路与所述喷油泵连接；喷油器组，所述喷油器组包括串联于所述燃油管路的若干所述喷油器，所述喷油泵能够通过所述燃油管路将燃油从所述喷油器组的第一端和第二端供入；若干限流阀，在所述燃油管路与每个所述喷油器连接节点的两端均设有所述限流阀，所述限流阀的出口朝向连接节点，当经过所述限流阀的流量超过所述限流阀的限制流量时所述限流阀关闭。
- 根据权利要求1所述的发动机燃油系统，其特征在于，所述喷油器的顶部设有三通结构，所述三通结构的第一端与位于所述喷油器连接节点的一端处的所述限流阀的出口连接，所述三通结构的第二端与位于所述喷油器连接节点的另一端处的另一个所述限流阀的出口连接，所述三通结构的第三端与所述喷油器的入口连接。
- 根据权利要求1所述的发动机燃油系统，其特征在于，所述喷油泵的出口处设有所述限流阀，所述限流阀的入口与所述喷油泵的出口连接，所述限流阀的出口与所述燃油管路连接。
- 根据权利要求1所述的发动机燃油系统，其特征在于，所述限流阀为机械式限流阀。
- 一种发动机，其特征在于，具有根据权利要求1至4任一项所述的发动机燃油系统。
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2019/109375 WO2021062600A1 (zh) | 2019-09-30 | 2019-09-30 | 发动机燃油系统及具有其的发动机 |
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| Application Number | Priority Date | Filing Date | Title |
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| PCT/CN2019/109375 WO2021062600A1 (zh) | 2019-09-30 | 2019-09-30 | 发动机燃油系统及具有其的发动机 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4926829A (en) * | 1988-11-28 | 1990-05-22 | Walbro Corporation | Pressure-responsive fuel delivery system |
| DE19548610A1 (de) * | 1995-12-23 | 1997-06-26 | Bosch Gmbh Robert | Kraftstoffeinspritzeinirchtung für Brennkraftmaschinen |
| JP2000265924A (ja) * | 1999-03-18 | 2000-09-26 | Keihin Corp | 燃料噴射装置における燃料圧力制御装置 |
| CN102312759A (zh) * | 2010-06-25 | 2012-01-11 | 卡特彼勒公司 | 具有贮存器和流量限制器的燃料系统 |
| CN105658947A (zh) * | 2013-07-05 | 2016-06-08 | 德尔福国际运营卢森堡有限公司 | 分布式燃料喷射装置 |
-
2019
- 2019-09-30 WO PCT/CN2019/109375 patent/WO2021062600A1/zh active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4926829A (en) * | 1988-11-28 | 1990-05-22 | Walbro Corporation | Pressure-responsive fuel delivery system |
| DE19548610A1 (de) * | 1995-12-23 | 1997-06-26 | Bosch Gmbh Robert | Kraftstoffeinspritzeinirchtung für Brennkraftmaschinen |
| JP2000265924A (ja) * | 1999-03-18 | 2000-09-26 | Keihin Corp | 燃料噴射装置における燃料圧力制御装置 |
| CN102312759A (zh) * | 2010-06-25 | 2012-01-11 | 卡特彼勒公司 | 具有贮存器和流量限制器的燃料系统 |
| CN105658947A (zh) * | 2013-07-05 | 2016-06-08 | 德尔福国际运营卢森堡有限公司 | 分布式燃料喷射装置 |
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