CN111120170A - High-pressure fuel oil distributor for double-fuel-supply-pump fuel oil system - Google Patents
High-pressure fuel oil distributor for double-fuel-supply-pump fuel oil system Download PDFInfo
- Publication number
- CN111120170A CN111120170A CN201911328328.5A CN201911328328A CN111120170A CN 111120170 A CN111120170 A CN 111120170A CN 201911328328 A CN201911328328 A CN 201911328328A CN 111120170 A CN111120170 A CN 111120170A
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- China
- Prior art keywords
- distributor
- pressure
- fuel
- oil
- pipe
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Classifications
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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
- F02M55/025—Common rails
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D41/3809—Common rail control systems
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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
- F02M55/004—Joints; Sealings
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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
- F02M55/04—Means for damping vibrations or pressure fluctuations in injection pump inlets or outlets
Abstract
The invention relates to a high-pressure fuel oil distributor for a double-fuel-supply-pump fuel oil system, which comprises a distributor body, a pipe joint and a distributor adapter, wherein the distributor body is provided with a plurality of oil passages; the middle part in the distributor body is provided with a horizontally arranged main oil duct, pipe joints are connected with pipe joints at pipe joint orifices at two ends of the main oil duct, and the two distributor pipe joints are connected with a left common rail pipe and a right common rail pipe of an engine through high-pressure oil pipes; the central axis of the main oil gallery and the central axis of the pipe joint oil hole are on the same horizontal line; the distributor is characterized in that distributor adapter orifices are connected to the upper side and the lower side of the distributor body, and the distributor adapter orifices are communicated with the main oil duct. The high-pressure fuel oil distributor for the double-fuel-supply-pump fuel oil system can effectively reduce pressure fluctuation in the fuel oil injection system, and improve the consistency of the injection pressure of each cylinder of the common rail system and the accuracy of fuel injection quantity control.
Description
Technical Field
The invention belongs to the technical field of fuel supply systems of engines, and particularly relates to a high-pressure fuel distributor for a double-fuel-supply-pump fuel system for improving pressure fluctuation of a high-pressure fuel supply system.
Background
Along with the stricter emission regulations, the oil supply quantity, the oil supply rate and the oil injection pressure required by the diesel engine continuously rise, higher requirements are provided for the injection consistency and the stability of the high-pressure common rail system, and in addition, the pressure fluctuation in the common rail can influence the oil injection quantity and the combustion characteristic of each cylinder, so that the pressure stability of the system becomes another key index of the common rail system.
The generation and propagation of pressure fluctuation is a complex process, not only influenced by the oil supply and injection processes, but also closely related to the system structure and pressure control. The pressure stability of the fuel system is always the key and difficult point of the research and development of the high-pressure common rail system at home and abroad. The problem that the pressure fluctuation amplitude of the common rail system is large can be solved to a certain extent through structural optimization of the high-pressure pipeline system, oil pipe vibration caused by hydraulic fluctuation in the high-pressure oil pipe is weakened, and therefore reliability and service life of the fuel supply system are improved.
Disclosure of Invention
In view of this, the present invention provides a high pressure fuel oil distributor for a dual fuel pump fuel oil system, which is used to reduce pressure fluctuation in a fuel oil injection system and improve consistency of injection pressure and accuracy of fuel injection amount control of cylinders in a common rail system.
In order to solve the technical problems, the invention adopts the technical scheme that:
a high-pressure fuel distributor for a fuel system with double fuel supply pumps comprises a distributor body, a pipe joint and a distributor adapter;
the middle part in the distributor body is provided with a horizontally arranged main oil duct, pipe joints are connected with pipe joints at pipe joint orifices at two ends of the main oil duct, and the two distributor pipe joints are connected with a left common rail pipe and a right common rail pipe of an engine through high-pressure oil pipes; the central axis of the main oil gallery and the central axis of the pipe joint oil hole are on the same horizontal line;
distributor adapter drill way department of the upper and lower both sides of distributor body is connected with the distributor adapter, distributor adapter drill way and main oil gallery intercommunication, two the distributor adapter dislocation set, and all through the upper and lower double oil supply pump connection of high pressure fuel pipe and engine.
Furthermore, the two ends of the upper side of the distributor body are provided with positioning holes for positioning the distributor.
Furthermore, a pressure limiting valve is arranged on the distributor body and comprises a pressure limiting valve body, a hollow bolt and a sealing washer, the pressure limiting valve body is connected and installed at the opening of the pressure limiting valve, and the sealing washer is arranged between the hollow bolt and the pressure limiting valve body.
Further, the sealing washer is a copper gasket.
Furthermore, pipe joint orifices at two ends of the main oil duct are in threaded connection with pipe joints.
Further, the distributor adapter orifices on the upper side and the lower side of the distributor body are in threaded connection with the distributor adapter.
Further, a rail pressure sensor is arranged on the distributor body.
Compared with the prior art, the high-pressure fuel oil distributor for the fuel oil system with the double fuel oil supply pumps has the following advantages:
(1) according to the high-pressure fuel oil distributor for the double-fuel-supply-pump fuel oil system, the number of the fuel supply pumps is two, so that the fuel supply amount of the fuel supply pumps is effectively increased, meanwhile, the fuel supply pressure balance of the upper fuel supply pump and the lower fuel supply pump is realized, and the injection pressure consistency of each cylinder of the common rail system is improved.
(2) According to the high-pressure fuel distributor for the fuel system with the double fuel supply pumps, the pressure limiting valve is provided with a proper starting pressure, and when the fuel pressure in the distributor is higher than the starting pressure, the pressure limiting valve is opened to return the fuel in the common rail to the fuel tank, so that the control of the fuel pressure in the main oil passage of the distributor is realized, and the oil pressure in the fuel injection system is prevented from being overhigh.
(3) The high-pressure fuel oil distributor for the fuel oil system with the double fuel oil supply pumps increases the high-pressure volume in the common rail system to a certain extent, is favorable for reducing the pressure fluctuation of a high-pressure fuel oil injection system, and improves the control precision of the fuel injection quantity.
(4) The high-pressure fuel distributor for the fuel system with the double fuel supply pumps is simple and reasonable in structural design, low in processing difficulty and easy to machine, form and install.
Drawings
FIG. 1 is a schematic diagram of an overall appearance structure of a high-pressure fuel distributor for a dual-fuel-supply-pump fuel system according to an embodiment of the present invention;
FIG. 2 is a partial cross-sectional view of FIG. 1;
fig. 3 is a schematic structural diagram of a distributor body according to an embodiment of the present invention.
In the figure: 1-distributor body, 2-pipe joint, 21-pipe joint hole, 3-positioning hole, 4-distributor adapter, 41-distributor adapter hole, 5-pressure limiting valve, 51-pressure limiting valve hole, 6-rail pressure sensor, 61-rail pressure sensor hole, 7-pressure limiting valve body, 8-hollow bolt, 9-sealing washer and 10-distributor main oil gallery.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The fixed connection relationship which is not explicitly described in the invention can be one of welding, bonding, bolt connection and clamping. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
As shown in fig. 1-3, a high pressure fuel distributor for a dual fuel pump fuel system comprises a distributor body 1, a pipe joint 2, a distributor adapter 4, a pressure limiting valve 5 and a rail pressure sensor 6;
the middle part in the distributor body 1 is provided with a horizontally arranged main oil gallery 10, pipe joints 2 are in threaded connection with pipe joint orifices 21 at two ends of the main oil gallery 10, and the two distributor pipe joints 2 are connected with a left common rail pipe and a right common rail pipe of an engine through high-pressure oil pipes; the central axis of the main oil gallery 10 and the central axis of the oil hole of the pipe joint 2 are on the same horizontal line.
The distributor adapter orifice 41 threaded connection of the upper and lower both sides of distributor body 1 has distributor adapter 4, distributor adapter orifice 41 communicates with main oil gallery 10, two distributor adapter 4 dislocation sets, and all is connected through the upper and lower double oil feed pump of high pressure fuel pipe and engine.
The two ends of the upper side of the distributor body 1 are provided with positioning holes 3 for positioning the distributor.
The pressure limiting valve 5 comprises a pressure limiting valve body 7, a hollow bolt 8 and a sealing washer 9, the pressure limiting valve body 7 is installed at a pressure limiting valve hole 51 through threaded connection, the sealing washer 9 is arranged between the hollow bolt 8 and the pressure limiting valve body 7, and the sealing washer 9 is a copper washer for improving the sealing performance and the service performance; the pressure limiting valve body 7 conveys the return oil of the pressure limiting valve to an oil return way of the engine through the hollow bolt 8. The pressure limiting valve 5 effectively prevents the fuel pressure in the common rail system from being too high, thereby improving the operation safety of the high-pressure fuel system.
The rail pressure sensor 6 is used to measure the fuel pressure in the common rail, which may be model 5093112AA from belief.
The dispenser is used as follows: high-pressure fuel oil is pumped by an upper high-pressure fuel supply pump and a lower high-pressure fuel supply pump, flows through the distributor adapters 4 on the upper side and the lower side, is converged and flows into the distributor body 1, and then flows into left and right common rail pipes of an engine from pipe joints 2 on the left end and the right end through a main oil duct 10 of the distributor body 1.
High-pressure fuel oil provided by an upper oil supply pump and a lower oil supply pump is uniformly mixed in a main oil duct 10 of the distributor body 1 and then uniformly supplied to the left common rail pipe and the right common rail pipe, so that the difference of the oil supply of the upper oil supply pump and the lower oil supply pump is effectively eliminated, the consistency of oil pressure in the left common rail pipe and the right common rail pipe of an engine is ensured, and the consistency of the injection pressure of each cylinder of the common rail system is further improved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the invention, so that any modifications, equivalents, improvements and the like, which are within the spirit and principle of the present invention, should be included in the scope of the present invention.
Claims (7)
1. A high-pressure fuel oil distributor for a fuel oil system with double fuel supply pumps is characterized by comprising a distributor body (1), a pipe joint (2) and a distributor adapter (4);
the middle part in the distributor body (1) is provided with a horizontally arranged main oil duct (10), pipe joints (2) are connected with pipe joint orifices (21) at two ends of the main oil duct (10), and the two distributor pipe joints (2) are connected with a left common rail pipe and a right common rail pipe of an engine through high-pressure oil pipes; the central axis of the main oil gallery (10) and the central axis of the oil hole of the pipe joint (2) are on the same horizontal line;
distributor adapter drill way (41) department of the upper and lower both sides of distributor body (1) is connected with distributor adapter (4), distributor adapter drill way (41) and main oil duct (10) intercommunication, two distributor adapter (4) dislocation set, and all through the upper and lower double oil supply pump connection of high pressure fuel pipe with the engine.
2. The high pressure fuel distributor for a dual fuel supply pump fuel system as claimed in claim 1, wherein the distributor body (1) is provided with positioning holes (3) at both ends of the upper side thereof for positioning the distributor.
3. The high-pressure fuel distributor for the dual-fuel-supply-pump fuel system as claimed in claim 1, wherein a pressure-limiting valve (5) is arranged on the distributor body (1), the pressure-limiting valve (5) comprises a pressure-limiting valve body (7), a hollow bolt (8) and a sealing washer (9), the pressure-limiting valve body (7) is connected and installed at an orifice (51) of the pressure-limiting valve, and the sealing washer (9) is arranged between the hollow bolt (8) and the pressure-limiting valve body (7).
4. A high-pressure fuel distributor for a dual-feed pump fuel system as claimed in claim 3, characterized in that said sealing gasket (9) is a copper gasket.
5. The high-pressure fuel distributor for a dual-feed pump fuel system as claimed in claim 1, wherein the nipple openings (2) at both ends of the main gallery (10) are threadedly connected to the nipples (21).
6. A high pressure fuel distributor for a dual feed pump fuel system as claimed in claim 1, wherein the distributor adapter ports (41) on the upper and lower sides of the distributor body (1) are in threaded connection with the distributor adapter (4).
7. A high-pressure fuel distributor for a dual-feed pump fuel system as claimed in claim 1, characterized in that said distributor body (1) is provided with a rail pressure sensor (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911328328.5A CN111120170A (en) | 2019-12-20 | 2019-12-20 | High-pressure fuel oil distributor for double-fuel-supply-pump fuel oil system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911328328.5A CN111120170A (en) | 2019-12-20 | 2019-12-20 | High-pressure fuel oil distributor for double-fuel-supply-pump fuel oil system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111120170A true CN111120170A (en) | 2020-05-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911328328.5A Pending CN111120170A (en) | 2019-12-20 | 2019-12-20 | High-pressure fuel oil distributor for double-fuel-supply-pump fuel oil system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111120170A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112377344A (en) * | 2020-11-16 | 2021-02-19 | 天津职业技术师范大学(中国职业培训指导教师进修中心) | Sectional type high-pressure common rail system for high-power diesel engine and working method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5197435A (en) * | 1992-08-13 | 1993-03-30 | Walbro Corporation | Molded fuel injection rail |
| CN102734017A (en) * | 2012-06-27 | 2012-10-17 | 无锡开普动力有限公司 | Electronic control high-pressure common-rail fuel injection system for V-shaped diesel engine |
| CN104141812A (en) * | 2013-05-06 | 2014-11-12 | 北京亚新科天纬油泵油嘴股份有限公司 | Common-rail fuel pressure limiting valve |
| CN209083453U (en) * | 2018-11-02 | 2019-07-09 | 山东鑫亚格林鲍尔燃油系统有限公司 | A kind of multi-cylinder diesel engine high-pressure common-rail pipe |
-
2019
- 2019-12-20 CN CN201911328328.5A patent/CN111120170A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5197435A (en) * | 1992-08-13 | 1993-03-30 | Walbro Corporation | Molded fuel injection rail |
| CN102734017A (en) * | 2012-06-27 | 2012-10-17 | 无锡开普动力有限公司 | Electronic control high-pressure common-rail fuel injection system for V-shaped diesel engine |
| CN104141812A (en) * | 2013-05-06 | 2014-11-12 | 北京亚新科天纬油泵油嘴股份有限公司 | Common-rail fuel pressure limiting valve |
| CN209083453U (en) * | 2018-11-02 | 2019-07-09 | 山东鑫亚格林鲍尔燃油系统有限公司 | A kind of multi-cylinder diesel engine high-pressure common-rail pipe |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112377344A (en) * | 2020-11-16 | 2021-02-19 | 天津职业技术师范大学(中国职业培训指导教师进修中心) | Sectional type high-pressure common rail system for high-power diesel engine and working method thereof |
| CN112377344B (en) * | 2020-11-16 | 2022-03-04 | 天津职业技术师范大学(中国职业培训指导教师进修中心) | Sectional type high-pressure common rail system for high-power diesel engine and working method thereof |
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Application publication date: 20200508 |
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| RJ01 | Rejection of invention patent application after publication |