CN103912425A - Energy storage type high-pressure common rail pipe - Google Patents
Energy storage type high-pressure common rail pipe Download PDFInfo
- Publication number
- CN103912425A CN103912425A CN201410106749.4A CN201410106749A CN103912425A CN 103912425 A CN103912425 A CN 103912425A CN 201410106749 A CN201410106749 A CN 201410106749A CN 103912425 A CN103912425 A CN 103912425A
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- CN
- China
- Prior art keywords
- common rail
- pressure
- rail pipe
- high pressure
- energy storage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
Abstract
The invention discloses an energy storage type high-pressure common rail pipe which comprises a common rail pipe body (3). A common rail cavity main oil passage (1) and high-pressure oil outlet passages (4) are formed in the common rail pipe body (3). The energy storage type high-pressure common rail pipe is characterized in that a plurality of orifice plate structures (5) are arranged in the common rail cavity main oil passage (1), each two adjacent orifice plate structures (5) form a high-pressure cavity (2), and the high-pressure cavities (2) are connected with an oil injector of a high-pressure common rail system through the high-pressure oil outlet passages (4). Owing to the structure, reduction of pressure fluctuation in a common rail cavity is facilitated, stability in oil injection law and uniformity in oil injection quantity can be improved, and noise can be effectively lowered.
Description
Technical field
Technical field of the present invention is engine fuel system technical field, particularly relates to a kind of energy storage type high pressure common rail pipe.
Background technique
High-pressure common rail oil supply system is the face the future new technology of harsh emission request exploitation of diesel engine, to reducing vehicular discharge, control environmental pollution is significant.High pressure co-rail system comprises oil pump, rail and oil sprayer two large divisions, and wherein high-pressure common-rail pipe is hollow elongated tubular metal body, for accepting and the high-pressure diesel being provided by high pressure oil pump being provided, and high-pressure diesel is offered to oil sprayer.Along with the continuous lifting of engine performance demand, more than in high-pressure common rail, the pressure of diesel oil even can reach 200MPa.
Application number a kind of combined rail for high pressure co-rail system that has been 200710190399.4 Patent Application Publication, in body, there is in-orbit axial passage, on the tube wall of body, radial hole is set in-orbit, aperture near the external wall of rail on this radial hole arranges plane, rail body and swivel nut and support are separate part, on the outer wall of body, the position corresponding to radial hole is set with swivel nut and support in-orbit, be connected high-pressure oil pipe joint at swivel nut with on support, and the bottom surface that makes high-pressure oil pipe joint compresses in the radial bore plane of body in-orbit, passage in high-pressure oil pipe joint, passage in radial hole and rail body interconnects.This rail does not need precision forging technology in the time of manufacturing, thereby significantly reduces manufacture cost.But, there is the technical problem that high pressure fuel pressure surge is large in the inner through-hole structure that adopts of high-pressure common-rail pipe of prior art.For multi-cylinder high-pressure rail motor altogether, supply under oil condition in common-rail injector circulation oil spout, high-pressure service pump pulsed, pressure surge in high-pressure common-rail pipe is very large, in high-pressure common-rail pipe, the pressure surge meeting of diesel oil has a strong impact on the fuel injection characteristic of oil sprayer, cause each cylinder fuel injection quantity inhomogeneous, even, concerning some cylinders, the fuel injection quantity of twice oil spout is all inconsistent, can have a strong impact on like this engine performance and emission performance.
In order to guarantee oil spout stability and the identity of injection of common-rail injector, the pressure surge of high-pressure common-rail pipe internal high pressure fuel oil need be controlled within the specific limits.In order to realize this demand, there are three kinds of solutions: the one, increase high-pressure common-rail pipe internal capacity; The 2nd, change high-pressure common-rail pipe oil-feed mode; The 3rd, the inner new structure that reduces fuel oil fluctuation that adopts of common rail pipe.Although excessive high-pressure common-rail pipe internal capacity can reduce the pressure surge of high pressure fuel, can cause difficulty to engine start; The oil-feed mode of high-pressure common-rail pipe is determined the feature of common rail pipe internal pressure demand by this body structure of high-pressure service pump and high pressure co-rail system, cannot be changed.
Summary of the invention
The high-pressure common-rail pipe internal high pressure fuel oil fluctuation that prior art that what the present invention solved is exists is too large, causes the unstable and fuel injection quantity conformity of the fuel injection characteristic of common-rail injector, thereby affects the technical problem of engine performance and emission performance.
Technological scheme of the present invention: a kind of energy storage type high pressure common rail pipe, comprise common rail pipe body 3, there are common rail chamber main oil gallery 1 and high pressure oil road 4 in common rail pipe body 3 inside, it is characterized in that: in rail chamber main oil gallery 1, have multiple orifice structure 5 altogether, adjacent holes plate structure 5 forms hyperbaric chamber 2, and hyperbaric chamber 2 is connected with high pressure co-rail system oil sprayer by high pressure oil road 4.
Beneficial effect of the present invention is: the internal structure of energy storage type high pressure common rail pipe has increased orifice structure, reduce its inner high pressure fuel pressure surge, improve the stability of high pressure co-rail system pressure, improve stability and the conformity of common-rail injector oil spout, and can effectively reduce engine noise.
Accompanying drawing explanation
Fig. 1 is the high-pressure common-rail pipe of prior art;
Fig. 2 is the energy storage type high pressure common rail pipe with orifice structure.
1-is rail chamber main oil gallery, 2-hyperbaric chamber, 3-common rail pipe body, 4-high pressure oil road, 5-orifice structure altogether
Embodiment
A kind of energy storage type high pressure common rail pipe, comprise common rail pipe body 3, there are common rail chamber main oil gallery 1 and high pressure oil road 4 in common rail pipe body 3 inside, it is characterized in that: in rail chamber main oil gallery 1, have multiple orifice structure 5 altogether, adjacent holes plate structure 5 forms hyperbaric chamber 2, and hyperbaric chamber 2 is connected with high pressure co-rail system oil sprayer by high pressure oil road 4.
Preferably high pressure oil road 4 is arranged in the neutral position of hyperbaric chamber 2, and the quantity of high pressure oil road 4 is corresponding with engine cylinder number, can promote fuel injection characteristic stability and the fuel injection quantity conformity of common-rail injector.
Preferably the diameter of rail chamber main oil gallery 1 is identical together for the diameter of hyperbaric chamber 2; The diameter of described orifice structure 5 is half of common rail chamber main oil gallery 1 diameter, described orifice structure 5 length identical with the length of hyperbaric chamber 2, the advantage of this structure be convenient to processing, noise minimum while simultaneously work.
Preferably the filler opening of high-pressure common-rail pipe is positioned at high-pressure common-rail pipe middle part, high pressure fuel enters in energy storage type high pressure common rail pipe inside through the filler opening at high-pressure common-rail pipe middle part, the pressure fluctuation of high-pressure common-rail pipe inside can be restricted to minimum, and the fuel injection characteristic of the oil sprayer of filler opening both sides is consistent.
Describe the specific embodiment of the present invention in detail below in conjunction with accompanying drawing 2:
High pressure fuel enters behind energy storage type high pressure common rail pipe inside through common rail pipe arbitrary end or middle part, process altogether rail chamber main oil gallery 1, orifice structure 5, hyperbaric chamber 2, high pressure oil road 4 enters in common-rail injector, completes the transportation of high pressure fuel from energy storage type high pressure common rail pipe to oil sprayer.
Determine that according to engine cylinder number and common rail pipe arrangement energy storage type high pressure common rail pipe high pressure fuel exports 4 quantity, thereby determine the quantity that needs orifice structure 5, guarantee that the oil sprayer of every cylinder is all corresponding one by one with the common rail chamber forming after increase orifice structure.
Claims (4)
1. an energy storage type high pressure common rail pipe, comprise common rail pipe body (3), there are common rail chamber main oil gallery (1) and high pressure oil road (4) in common rail pipe body (3) inside, it is characterized in that: in rail chamber main oil gallery (1), have multiple orifice structure (5) altogether, adjacent holes plate structure (5) forms hyperbaric chamber (2), and hyperbaric chamber (2) is connected with high pressure co-rail system oil sprayer by high pressure oil road (4).
2. energy storage type high pressure common rail pipe according to claim 1, is characterized in that: high pressure oil road (4) is arranged in the neutral position of hyperbaric chamber (2), and the quantity of high pressure oil road (4) is corresponding with engine cylinder number.
3. energy storage type high pressure common rail pipe according to claim 1, is characterized in that: the diameter of described hyperbaric chamber (2) the together diameter of rail chamber main oil gallery (1) is identical; The diameter of described orifice structure (5) is the half of common rail chamber main oil gallery (1) diameter; The length of described orifice structure (5) is identical with the length of hyperbaric chamber (2).
4. energy storage type high pressure common rail pipe according to claim 1, is characterized in that: the filler opening of described high-pressure common-rail pipe is positioned at high-pressure common-rail pipe middle part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410106749.4A CN103912425A (en) | 2014-03-17 | 2014-03-17 | Energy storage type high-pressure common rail pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410106749.4A CN103912425A (en) | 2014-03-17 | 2014-03-17 | Energy storage type high-pressure common rail pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103912425A true CN103912425A (en) | 2014-07-09 |
Family
ID=51038363
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410106749.4A Pending CN103912425A (en) | 2014-03-17 | 2014-03-17 | Energy storage type high-pressure common rail pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103912425A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109891082A (en) * | 2016-08-23 | 2019-06-14 | 臼井国际产业株式会社 | Gasoline directly sprays track |
| GB2575037A (en) * | 2018-06-25 | 2020-01-01 | Delphi Tech Ip Ltd | Method for manufacturing a common rail |
| CN113931763A (en) * | 2021-09-30 | 2022-01-14 | 东风商用车有限公司 | High-pressure common rail pipe |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1030521A (en) * | 1996-07-12 | 1998-02-03 | Denso Corp | Fuel injector |
| JP2000073908A (en) * | 1998-09-01 | 2000-03-07 | Denso Corp | High pressure fuel supply system |
| DE10140058A1 (en) * | 2001-08-16 | 2002-10-24 | Bosch Gmbh Robert | High pressure fuel storage-container has basic body with lengthwise and transverse hollow cavities, connecting support, and inner storage chamber |
| FR2895033A3 (en) * | 2005-12-21 | 2007-06-22 | Renault Sas | Fuel injection device for cylinder of internal combustion engine, has partitions movably mounted in chamber between openings via springs, where each partition has passage with specific diameter and chamber is connected to pump by pipe |
| CN102174918A (en) * | 2011-03-13 | 2011-09-07 | 北京建筑工程学院 | Component type high-pressure common rail device |
-
2014
- 2014-03-17 CN CN201410106749.4A patent/CN103912425A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1030521A (en) * | 1996-07-12 | 1998-02-03 | Denso Corp | Fuel injector |
| JP2000073908A (en) * | 1998-09-01 | 2000-03-07 | Denso Corp | High pressure fuel supply system |
| DE10140058A1 (en) * | 2001-08-16 | 2002-10-24 | Bosch Gmbh Robert | High pressure fuel storage-container has basic body with lengthwise and transverse hollow cavities, connecting support, and inner storage chamber |
| FR2895033A3 (en) * | 2005-12-21 | 2007-06-22 | Renault Sas | Fuel injection device for cylinder of internal combustion engine, has partitions movably mounted in chamber between openings via springs, where each partition has passage with specific diameter and chamber is connected to pump by pipe |
| CN102174918A (en) * | 2011-03-13 | 2011-09-07 | 北京建筑工程学院 | Component type high-pressure common rail device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109891082A (en) * | 2016-08-23 | 2019-06-14 | 臼井国际产业株式会社 | Gasoline directly sprays track |
| GB2575037A (en) * | 2018-06-25 | 2020-01-01 | Delphi Tech Ip Ltd | Method for manufacturing a common rail |
| CN113931763A (en) * | 2021-09-30 | 2022-01-14 | 东风商用车有限公司 | High-pressure common rail pipe |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140709 |