CN203285591U - Gasoline direct injection fuel machine high pressure fuel rail - Google Patents
Gasoline direct injection fuel machine high pressure fuel rail Download PDFInfo
- Publication number
- CN203285591U CN203285591U CN2013202298571U CN201320229857U CN203285591U CN 203285591 U CN203285591 U CN 203285591U CN 2013202298571 U CN2013202298571 U CN 2013202298571U CN 201320229857 U CN201320229857 U CN 201320229857U CN 203285591 U CN203285591 U CN 203285591U
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- rail
- pipe
- high pressure
- pressure oil
- common rail
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Abstract
The utility model discloses a gasoline direct injection fuel machine high pressure fuel rail. The gasoline direct injection fuel machine high pressure fuel rail is provided with a common rail tube rail body, wherein the two ends of the common rail tube rail body are closed. A high pressure fuel tube connector, a rail pressure sensor connector, protective caps, a plug and a support which are fixedly connected to the common rail tube rail body are components which are formed after being machined and directly welded on the rail body. Through holes which are communicated with an axial channel of a common rail tube are formed in the high pressure fuel tube connector, the rail pressure sensor connector and the protective caps, and no pressure relief valve is arranged on the common rail tube rail body. The high pressure fuel tube connector, the rail pressure sensor connector, the protective caps, the plug and the support are machined in a stamping mode and directly welded on the rail body, a special work fixture does not need to be designed, therefore, machining working procedures of the intermediate link are reduced, machining cost is reduced, production efficiency is improved, and the phenomena that connection thread root casting concave-convex transition is not round, and the thickness of the inner wall of a tube body is not uniform are avoided.
Description
Technical field
The utility model is that the high pressure fuel that oil feed pump is provided is assigned in each oil sprayer about in-cylinder direct injection oil-burning machine (GDI) high pressure common rail fuel injection system, plays the high pressure oil rail high pressure oil rail (common rail pipe) of accumulator effect." high pressure " refers to that injection system pressure ratio conventional gasoline is confidential and exceeds 3 times, and high energy reaches 20Mpa.
Background technique
In gasoline direct high-pressure co-rail fuel injection system, its volume of common rail pipe is to cut down the charge oil pressure fluctuation of high pressure oil pump and each oil sprayer by the pressure oscillations that injection process causes, the pressure surge in high pressure oil rail is controlled under 1MPa.But its volume again can not be too large, to guarantee common rail, enough pressure response speed arranged to follow the tracks of fast the variation of petrol engine operating mode.Storage and distribution have certain pressure gasoline, be assigned to the high pressure oil rail of each oil cylinder by oil sprayer, be radially distributed with the high-pressure oil pipe joint that connects one or two above high-pressure oil pipe on the rail body, high-pressure oil pipe be connected high pressure oil pump, pass through helmet and directly with the same number of oil sprayer of cylinder, be connected.High-pressure oil pipe is the passage that connects common rail pipe and electric-controlled fuel injector.High pressure oil rail is copper brazed tube, by four supports, is fixed to cylinder cap.High-pressure pipe connector, drain mast joint, oil pressure sensor, Decompression valves are integrated on oily rail.Liquid stream damper (restrictor) and pressure restrictor also have been installed on high-pressure common-rail pipe.Pressure transducer provides the pressure signal of high pressure oil rail to ECU; The liquid stream damper guarantees to cut off the fuel feeding to oil sprayer when oil sprayer occurs that fuel oil is sewed fault, and can reduce the pressure surge in common rail and high-pressure oil pipe; Pressure restrictor guarantees that high pressure oil rail when pressure anomaly occurring, carries out drainage with the pressure in high pressure oil rail rapidly.the working principle of high pressure common rail fuel injection system is that low-pressure fuel pump is inputted high pressure oil pump with fuel oil, high pressure oil pump is sent the fuel oil pressurization into high pressure oil rail, pressure in high pressure oil rail by ECU (Electrical Control Unit) according to the oily rail pressure of oily rail pressure sensor measurement and need to regulate, fuel oil in high pressure oil rail is through the high-pressure oil pipe oil sprayer, running state according to machine, determine suitable injection timing by ECU (Electrical Control Unit), oil injection duration sprays into cylinder by the electronic oil injection device of electrichydraulic control with fuel oil, actual pressure in high-pressure common-rail pipe changes with the changed condition of engine operation, carry out induction pressure with rail pressure sensor.The prior art gasoline engine high pressure oil rail mainly contains two kinds of structures: a kind of is to be connected with rail pressure sensor joint, high-pressure oil pipe joint, helmet, helmet support, Decompression valves, and support on the stainless steel welding rail body of two ends lining sealing.The rail pressure sensor joint, the inside of high-pressure oil pipe joint, helmet all has the through hole that communicates with body inside, is connected to Decompression valves on body in-orbit, helmet is installed between helmet and rail body supports.The high pressure oil rail of said structure can meet the petrol engine of high injection pressure.The deficiency of this structure is between rail body and helmet to need to add part by a machine with angle---the helmet support and connection, and it is more complicated that helmet supports processing, manufacturing efficiency is on the low side, is unfavorable for mass production, is secondly to do the restrictor pressure release by Decompression valves to be unfavorable for the stable of rail pressure; Another kind is directly with the method for oily rail by casting and machining, with rail pressure sensor joint, high-pressure oil pipe joint, helmet, helmet support, Decompression valves, reach the support over all Integration at the intake manifold root.The deficiency of the common rail pipe that this integral body is processed to form is that manufacturing procedure is complicated, connecting thread on pipe joint needs the frock clamping of design specialized just can complete the processing of outside thread basic circle and screw thread, the time cost of processing is high, and efficiency is lower, the concavo-convex transition out-of-flatness of joint screw thread root casting.The oil rail is because mounting interface is fixing, and the petrol engine of coupling different model must need die sinking again, can not mate the petrol engine of different model by the change support, and the initial stage of development cost is high than the oily rail of welding manner.
Summary of the invention
The purpose of this utility model, for the deficiency that above-mentioned prior art exists, provides a kind of simple in structure, and versatility is high, and modification in construction is adaptable, can mate dissimilar petrol engine, and can reduce manufacture cost and the common rail pipe of shortening construction cycle.
To achieve these goals, the technical solution of the utility model is: a kind of in-cylinder direct injection oil-burning machine high pressure oil rail, common rail pipe rail body with a closed at both ends, it is characterized in that, the high-pressure oil pipe joint that connects firmly on common rail pipe rail body, rail pressure sensor joint, helmet, plug and support are the members by the machining aftershaping, and be directly to weld on body in-orbit, high-pressure oil pipe joint, rail pressure sensor joint and helmet all are shaped with the through hole of the axial channel connection of rail pipe together, and on common rail pipe rail body, Decompression valves are not set.
High-pressure oil pipe joint, rail pressure sensor joint, helmet and support are arranged, and the two ends welding is used for the plug of sealing, rail body, rail body two ends welding plug; Decompression valves is not set on the rail body; Weld helmet, rail pressure sensor joint and high-pressure oil pipe joint on the rail body, as required, have each other certain angle; Welding support on the rail body.
The utility model has following beneficial effect than prior art.
The utility model adopts the mode of punching press to process on high-pressure oil pipe joint, rail pressure sensor joint, helmet, plug and support, directly weld in-orbit on body, do not need the frock clamping of design specialized, reduced the manufacturing procedure of medium tache, reduce processing cost, improved manufacturing efficiency.Avoided not rounding of the concavo-convex transition of joint screw thread root casting, the phenomenon that the inboard wall of tube body became uneven is even.
Simple in structure, versatility is high, and modification in construction is adaptable.In engine structure when remodeling,, only need to change the mould of support and the positioning tool of welding, just can mate dissimilar petrol engine, decrease manufacture cost and shortening construction cycle.Because helmet and rail body directly weld, the helmet support connecting piece in the middle of having cancelled, reduced manufacture cost, improved the reliability that connects; The Decompression valves of cancelling, not only reduced cost of production, and can avoid the impact of Decompression valves on rail pressure stability, more can meet higher jet pressure, reaches better fuel economy, power character and higher emission request.
High pressure oil rail device of the present utility model, rational in infrastructure, to use reliably, it is compared with existing hydraulic oil rail for petrol engines, has manufacturing efficiency high, low cost and other advantages.
Description of drawings
Fig. 1 is the organigram of the utility model in-cylinder direct injection oil-burning machine high pressure oil rail;
Fig. 2 is the sectional structure schematic diagram that rail pressure sensor joint shown in Figure 1 is connected with the rail body;
Fig. 3 is the sectional structure schematic diagram that high-pressure oil pipe joint shown in Figure 1 is connected with the rail body;
Fig. 4 is the sectional structure schematic diagram that helmet shown in Figure 1 is connected with the rail body;
Fig. 5 is supporting structure schematic diagram shown in Figure 1.
In figure: 1 stamping part support, 2 common rail pipe rail bodies, 3 rail pressure sensor joints, 4 axial passages, 5 radial holes, 6 stamping part helmets, 7 high-pressure oil pipe joints, 8 stamping part plugs.
Embodiment
Consult Fig. 1.In a most preferred embodiment of in-cylinder direct injection oil-burning machine high pressure oil rail described below, on the tube wall of common rail pipe rail body 2, radial hole 5 is set, the aperture near rail body 2 outer walls on this radial hole 5 arranges various terminal.Common rail pipe rail body 2 is directly selected stainless-steel seamless pipe, and helmet, plug and support are all the stamping part that adopts punch process.The axial two ends of common rail pipe rail body 2 are by stamping part plug 8 welded seals.Machine adds part rail pressure sensor joint 3 high-pressure oil pipe joints 7, stamping part helmet 6 and stamping part support 1 and directly welds in-orbit on body.High-pressure oil pipe joint 7, rail pressure sensor joint 3 and helmet all are shaped with the through hole of the axial channel connection of rail pipe together, and on common rail pipe rail body, Decompression valves are not set.High-pressure oil pipe joint,, rail pressure sensor joint 3, high-pressure oil pipe joint 7, stamping part helmet 6 be shaped with the through hole of the axial channel connection of rail pipe together.
Rail pressure sensor joint 3 shown in Figure 2 is hollow circular cylinder.For its when welding and common rail pipe rail body are fitted tightly, the surface of contact of hollow circular cylinder root and common rail pipe rail body 2 is an arc, hollow circular cylinder is shaped with the circular cone reducing through hole that is communicated with common rail pipe axial passage 4, is shaped with the internal thread of connecting rail pressure sensor to passage 4 free end cylinder holes away from common rail pipe rail axon.
High-pressure oil pipe joint 7 hollow circular cylinder roots shown in Figure 3 are shaped with the welding arc shaped surface that fits tightly with common rail pipe rail body 2 surface of contact equally, are shaped with the outside thread that connects high-pressure oil pipe and the horn mouth reducing through hole that axially is communicated with the ladder attachment hole on cylindrical body.
The stamping part helmet 6 of connection oil sprayer shown in Figure 4 is cylinder thin walled tube box-shape article, and bottom is shaped with the arc contact surface that fits tightly with common rail pipe rail body, fits tightly during welding on the body of common rail pipe rail body 2.The opening end of stamping part helmet 6 is shaped with radially outer edge.
Shown in Figure 5, stamping part support 1 is shaped with the arc contact surface that fits tightly common rail pipe rail body 2, during welding and common rail pipe rail body 3 bodys fit tightly.The sagging end of stamping part support 1 is shaped with the fixedly mounting hole of common rail pipe rail body 2.Above-mentioned stamping part support 1, common rail pipe rail body 2, rail pressure sensor joint 3, high-pressure oil pipe joint 7, stamping part helmet 6 and stamping part plug 8 be first to adopt projection welding to fix, then use the disposable welding fabrication of hard soldering.Stamping part support 1, rail pressure sensor joint 3, high-pressure oil pipe joint 7, stamping part helmet 6 and stamping part plug 8 integrate on the body of common rail pipe rail body 2.High-pressure oil pipe joint 7 can directly connect high-pressure oil pipe, and rail pressure sensor joint 3 directly connecting rail pressure sensor, stamping part helmet 6 can directly connect oil sprayer, and stamping part support 1 can be directly installed on cylinder cap.
Claims (8)
1. in-cylinder direct injection oil-burning machine high pressure oil rail, common rail pipe rail body with a closed at both ends, it is characterized in that, the high-pressure oil pipe joint that connects firmly on common rail pipe rail body, rail pressure sensor joint, helmet, plug and support are the members by the machining aftershaping, and be directly to weld on body in-orbit, high-pressure oil pipe joint, rail pressure sensor joint and helmet all are shaped with the through hole of the axial channel connection of rail pipe together, and on common rail pipe rail body, Decompression valves are not set.
2. in-cylinder direct injection oil-burning machine high pressure oil rail as claimed in claim 1, it is characterized in that: common rail pipe rail body (2) is directly selected stainless-steel seamless pipe, and helmet, plug and support are all the stamping part that adopts punch process.
3. in-cylinder direct injection oil-burning machine high pressure oil rail as claimed in claim 1 is characterized in that: the axial two ends of common rail pipe rail body (2) are by stamping part plug (8) welded seal.
4. in-cylinder direct injection oil-burning machine high pressure oil rail as claimed in claim 1, it is characterized in that: rail pressure sensor joint (3) is hollow circular cylinder, the surface of contact of hollow circular cylinder root and common rail pipe rail body (2) is arc, hollow circular cylinder is shaped with the circular cone reducing through hole that is communicated with common rail pipe axial passage (4), is shaped with the internal thread of connecting rail pressure sensor to passage (4) free end cylinder hole away from common rail pipe rail axon.
5. in-cylinder direct injection oil-burning machine high pressure oil rail as claimed in claim 1, it is characterized in that: high-pressure oil pipe joint (7) hollow circular cylinder root is shaped with the welding arc shaped surface that fits tightly with common rail pipe rail body (2) surface of contact equally, is shaped with the outside thread that connects high-pressure oil pipe and the horn mouth reducing through hole that axially is communicated with the ladder attachment hole on cylindrical body.
6. in-cylinder direct injection oil-burning machine high pressure oil rail as claimed in claim 1, it is characterized in that: the stamping part helmet (6) that connects oil sprayer is cylinder thin walled tube box-shape article, bottom is shaped with the arc contact surface that fits tightly with common rail pipe rail body, fit tightly during welding on the body of common rail pipe rail body (2), the opening end of stamping part helmet (6) is shaped with radially outer edge.
7. in-cylinder direct injection oil-burning machine high pressure oil rail as claimed in claim 1, it is characterized in that: stamping part support (1) is shaped with the arc contact surface that fits tightly common rail pipe rail body (2), and sagging end is shaped with the fixedly mounting hole of common rail pipe rail body (2).
8. in-cylinder direct injection oil-burning machine high pressure oil rail as claimed in claim 1, it is characterized in that: stamping part support (1), common rail pipe rail body (2), rail pressure sensor joint (3), high-pressure oil pipe joint (7), stamping part helmet (6) and stamping part plug (8) are first to adopt projection welding to fix, then use the disposable welding fabrication of hard soldering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202298571U CN203285591U (en) | 2013-04-30 | 2013-04-30 | Gasoline direct injection fuel machine high pressure fuel rail |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202298571U CN203285591U (en) | 2013-04-30 | 2013-04-30 | Gasoline direct injection fuel machine high pressure fuel rail |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203285591U true CN203285591U (en) | 2013-11-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013202298571U Expired - Fee Related CN203285591U (en) | 2013-04-30 | 2013-04-30 | Gasoline direct injection fuel machine high pressure fuel rail |
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| CN (1) | CN203285591U (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105587450A (en) * | 2014-11-12 | 2016-05-18 | 罗伯特·博世有限公司 | Fuel Injection And Fuel Storage For Fuel Injection |
| CN106091904A (en) * | 2016-08-01 | 2016-11-09 | 上海众源燃油分配器制造有限公司 | A kind of cubing for high pressure oil rail dimension control |
| CN107438711A (en) * | 2015-04-02 | 2017-12-05 | 罗伯特·博世有限公司 | Hydraulic pressure attachment arrangement on fuel injection apparatus and fuel injection apparatus |
| US10030619B2 (en) | 2016-07-07 | 2018-07-24 | Caterpillar Inc. | Connector for mounting sensor in pressurized fluid system |
| US10208723B2 (en) | 2016-05-25 | 2019-02-19 | Hi-Vol Products | Threaded fuel rails |
| CN109923299A (en) * | 2016-09-30 | 2019-06-21 | 世倍特集团有限责任公司 | Fuel rail component |
| CN109944725A (en) * | 2018-12-11 | 2019-06-28 | 上海威克迈龙川汽车发动机零件有限公司 | A kind of distribution pipe and its processing technology and engine high pressure oil rail assembly |
| CN113027653A (en) * | 2021-04-29 | 2021-06-25 | 上海众源燃油分配器制造有限公司 | 500bar stainless steel gasoline high-pressure oil rail and machining process thereof |
| CN113231585A (en) * | 2021-04-29 | 2021-08-10 | 上海众源燃油分配器制造有限公司 | 500bar high-pressure oil rail forging process for stainless steel gasoline |
-
2013
- 2013-04-30 CN CN2013202298571U patent/CN203285591U/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105587450A (en) * | 2014-11-12 | 2016-05-18 | 罗伯特·博世有限公司 | Fuel Injection And Fuel Storage For Fuel Injection |
| CN107438711A (en) * | 2015-04-02 | 2017-12-05 | 罗伯特·博世有限公司 | Hydraulic pressure attachment arrangement on fuel injection apparatus and fuel injection apparatus |
| CN107438711B (en) * | 2015-04-02 | 2020-10-23 | 罗伯特·博世有限公司 | Fuel injection apparatus and hydraulic attachment on a fuel injection apparatus |
| US10208723B2 (en) | 2016-05-25 | 2019-02-19 | Hi-Vol Products | Threaded fuel rails |
| US10030619B2 (en) | 2016-07-07 | 2018-07-24 | Caterpillar Inc. | Connector for mounting sensor in pressurized fluid system |
| CN106091904A (en) * | 2016-08-01 | 2016-11-09 | 上海众源燃油分配器制造有限公司 | A kind of cubing for high pressure oil rail dimension control |
| CN109923299A (en) * | 2016-09-30 | 2019-06-21 | 世倍特集团有限责任公司 | Fuel rail component |
| US11008989B2 (en) | 2016-09-30 | 2021-05-18 | Vitesco Technologies GmbH | Fuel rail assembly |
| CN109923299B (en) * | 2016-09-30 | 2021-11-23 | 世倍特集团有限责任公司 | Fuel rail assembly |
| CN109944725A (en) * | 2018-12-11 | 2019-06-28 | 上海威克迈龙川汽车发动机零件有限公司 | A kind of distribution pipe and its processing technology and engine high pressure oil rail assembly |
| CN113027653A (en) * | 2021-04-29 | 2021-06-25 | 上海众源燃油分配器制造有限公司 | 500bar stainless steel gasoline high-pressure oil rail and machining process thereof |
| CN113231585A (en) * | 2021-04-29 | 2021-08-10 | 上海众源燃油分配器制造有限公司 | 500bar high-pressure oil rail forging process for stainless steel gasoline |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131113 Termination date: 20210430 |