CN210919302U - High-pressure fuel pump structure adapted to gasoline engine with double fuel injection systems - Google Patents
High-pressure fuel pump structure adapted to gasoline engine with double fuel injection systems Download PDFInfo
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- CN210919302U CN210919302U CN201921768549.XU CN201921768549U CN210919302U CN 210919302 U CN210919302 U CN 210919302U CN 201921768549 U CN201921768549 U CN 201921768549U CN 210919302 U CN210919302 U CN 210919302U
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- 239000000446 fuel Substances 0.000 title claims abstract description 106
- 238000002347 injection Methods 0.000 title claims abstract description 39
- 239000007924 injection Substances 0.000 title claims abstract description 39
- 239000003502 gasoline Substances 0.000 title claims abstract description 13
- 230000006978 adaptation Effects 0.000 claims abstract description 4
- 230000009977 dual effect Effects 0.000 claims description 8
- 239000002828 fuel tank Substances 0.000 claims description 4
- 239000007921 spray Substances 0.000 claims 2
- 230000003044 adaptive effect Effects 0.000 claims 1
- 238000005086 pumping Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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Abstract
The utility model relates to an adaptation is in two fuel injection system gasoline engine's high pressure fuel pump structure, two fuel injection system engines are equipped with the direct fuel guide rail assembly that spouts of jar, intake duct simultaneously, and this high pressure fuel pump structure includes the pump body, plunger, low pressure oil inlet, high pressure oil-out, and the oil tank is connected to the low pressure oil inlet, the plunger overcoat establish the bush, this high pressure fuel pump structure is still including locating the low pressure oil-out on the pump body, and the low pressure oil-out directly links to each other with the fuel guide rail assembly that the intake duct jetted, and the jar internal direct fuel guide rail assembly in the external two fuel injection system engines of high pressure oil-out is equipped with the low pressure pipeline of connecting low pressure oil inlet and low pressure oil-out in the pump body. Compared with the prior art, the utility model has the advantages of avoid the plunger inflation and take place the interlock with the bush and produce jamming, simple structure, with low costs.
Description
Technical Field
The utility model belongs to the technical field of two fuel injection system engine injection technique and specifically relates to a high pressure fuel pump structure of adaptation in two fuel injection system gasoline engine is related to.
Background
The high-pressure fuel pump is a component matched with an in-cylinder direct injection engine, fuel is extracted from a fuel tank by a low-pressure fuel pump, and after entering the high-pressure fuel pump, the fuel is compressed and boosted to 350bar from the pressure of 5bar, (recommended value of six emission regulations in Delfuguo), and is input into a high-pressure fuel guide rail. As shown in fig. 1 and 2, a conventional high pressure fuel pump has a low pressure oil inlet 1 and a high pressure oil outlet 2, and the high pressure fuel pump is provided therein with a low pressure pipeline 3, an oil pumping chamber 4 and a plunger 5, the plunger 5 is disposed in the oil pumping chamber 4, one end of the low pressure pipeline 3 is connected to the plunger 5, and the other end is connected to the low pressure oil inlet 1.
In the engine with the dual fuel injection system of direct injection and air inlet injection, when the air inlet injection system works alone, a plunger in the high-pressure fuel pump still moves up and down along with a camshaft of the engine, but the high-pressure fuel is not output by the fuel pump at the moment. In the high-pressure fuel pump with the traditional structure, the same part of fuel is repeatedly sucked into/pushed out of an inner cavity of the high-pressure fuel pump, the temperature of the fuel is rapidly increased, a plunger is expanded due to the temperature increase, is very easy to be occluded with a bush matched with the plunger, and is finally blocked.
SUMMERY OF THE UTILITY MODEL
The object of the present invention is to provide a high pressure fuel pump structure adapted to a gasoline engine with dual fuel injection systems for overcoming the drawbacks of the prior art.
The purpose of the utility model can be realized through the following technical scheme:
the utility model provides a high pressure fuel pump structure of adaptation in two fuel injection system gasoline engine, two fuel injection system engines be equipped with the fuel guide rail assembly that the in-cylinder directly spouts, intake duct injection simultaneously, this high pressure fuel pump structure includes the pump body, plunger, low pressure oil inlet, high-pressure oil-out, low pressure oil inlet connect the oil tank, the plunger overcoat establish the bush, this high pressure fuel pump structure is still including locating the low pressure oil-out on the pump body, low pressure oil-out and intake duct injection's fuel guide rail assembly directly link to each other, the external two fuel injection system engines of high-pressure oil-out in the in-cylinder directly spout the fuel guide rail assembly, the pump body in be equipped with the low pressure pipeline of connecting low pressure oil inlet and low pressure oil-out.
Preferably, a low-pressure oil inlet pipeline is arranged in the pump body and communicated with the low-pressure oil inlet.
Preferably, one end of the low-pressure pipeline is connected with a low-pressure oil inlet pipeline, and the other end of the low-pressure pipeline is connected with a low-pressure oil outlet.
Preferably, the pump body top be equipped with the pump cover, low pressure oil inlet locate one side of pump cover, high pressure oil-out, low pressure oil-out locate on the pump body.
Preferably, the lining is made of hard alloy.
Preferably, a low-pressure fuel pump is arranged in the fuel tank.
Compared with the prior art, the utility model has the advantages of it is following:
1. the utility model discloses a high pressure fuel pump is equipped with low pressure oil feed, high pressure oil outlet and low pressure oil outlet, the high pressure oil outlet is external to have two fuel injection system engine's direct injection fuel guide rail assembly in jar, the fuel guide rail assembly that the intake duct of two fuel injection system engine was sprayed is directly connected to the low pressure oil outlet, the low pressure oil inlet is connected with the oil tank that is equipped with the low pressure fuel pump, the low pressure oil inlet is connected to the one end of the low pressure pipeline in the pump body, the low pressure oil outlet is connected to the other end, when intake duct injection system worked alone, the fuel passes through high pressure fuel pump plunger region, the fuel that flows through the oil pump plunger can take away the heat that produces when the plunger moves from top to bottom through the effect of the oil circuit motion of low pressure oil inlet, the low pressure oil;
2. the utility model can avoid the problems of plunger expansion and jamming caused by the occlusion of the bush by arranging the low-pressure oil outlet on the high-pressure fuel pump, and has simple structure and low modification cost;
3. the utility model discloses high pressure fuel pump adopts high temperature resistant bush, is favorable to matcing with the plunger under high temperature.
Drawings
FIG. 1 is a schematic external view of a conventional high pressure fuel pump of the prior art;
FIG. 2 is a schematic diagram of the internal structure of a conventional high pressure fuel pump of the prior art;
FIG. 3 is an external schematic view of the high pressure fuel pump structure of the present invention;
FIG. 4 is an internal schematic view of a high pressure fuel pump structure according to the present invention;
FIG. 5 is a connecting structure diagram of the high pressure fuel pump of the present invention applied to a dual fuel injection system;
the reference numbers in the figures indicate:
1. the fuel injection device comprises a low-pressure fuel inlet, a low-pressure fuel outlet, a high-pressure fuel outlet, a low-pressure pipeline, a pump fuel cavity, a plunger, a low-pressure fuel outlet, a pump body, a pump cover, a low-pressure fuel inlet pipeline, a liner, a direct injection fuel guide rail assembly, a fuel tank, a low-pressure fuel pump, a high-pressure fuel injector.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall fall within the protection scope of the present invention.
As shown in fig. 3 and 4, the utility model relates to a high-pressure fuel pump structure adapted to a gasoline engine with double fuel injection systems, which comprises a pump body, a pump cover, a low-pressure oil inlet 1, a high-pressure oil outlet 2, a low-pressure oil outlet 6 and a plunger 5.
The pump cover 8 is fixed on the top of the pump body 7, and one side of the pump cover 8 is provided with a low-pressure oil inlet 1. The pump body 7 is provided with a high-pressure oil outlet 2 and a low-pressure oil outlet 6. A low-pressure oil inlet pipeline 9 is arranged in the pump cover 8, and the low-pressure oil inlet pipeline 9 is connected with the low-pressure oil inlet 1. A low-pressure pipeline 3 is fixed in the pump body 7, one end of the low-pressure pipeline 3 is connected with a low-pressure oil inlet pipeline 9, and the other end of the low-pressure pipeline 3 is connected with a low-pressure oil outlet 6. The pump body 7 is internally provided with an oil pumping chamber 4, one end of the plunger 5 is externally connected with a power mechanism, and the other end of the plunger penetrates into the pump body 7 from the bottom of the pump body 7 and is arranged in the oil pumping chamber 4. A bush 10 is sleeved outside the plunger 5. Based on the requirement to the heat resistance, the utility model discloses a bush 10 adopts the carbide bush.
The high-pressure oil outlet 2 is externally connected with a direct injection fuel guide rail assembly 11 in the dual-fuel injection system engine, and the low-pressure oil outlet 6 is directly connected with a fuel guide rail assembly 12 injected by an air inlet channel in the dual-fuel injection system engine. The low-pressure oil inlet 1 is connected with an oil tank 13 provided with a low-pressure fuel pump 14. When the air inlet injection system works independently, fuel passes through a plunger area of a high-pressure fuel pump, and the fuel flowing through the plunger of the fuel pump can take away heat generated when the plunger moves up and down through an oil path motion of a low-pressure oil inlet, a low-pressure oil outlet and a low-pressure pipeline, so that the plunger is prevented from being expanded to be occluded with a bush to generate clamping stagnation.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of various equivalent modifications or replacements within the technical scope of the present invention, and these modifications or replacements should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (6)
1. The utility model provides a high pressure fuel pump structure of adaptation in two fuel injection system gasoline engine, two fuel injection system engine be equipped with the in-cylinder directly spout fuel guide rail assembly (11), the fuel guide rail assembly (12) that the intake duct sprays simultaneously, this high pressure fuel pump structure includes the pump body (7), plunger (5), low pressure oil inlet (1), high pressure oil-out (2), low pressure oil inlet (1) connect oil tank (13), plunger (5) overcoat establish bush (10), its characterized in that, this high pressure fuel pump structure is still including locating low pressure oil-out (6) on the pump body (7), low pressure oil-out (6) directly link to each other with fuel guide rail assembly (12) that the intake duct sprays, high pressure oil-out (2) the in-cylinder directly spout fuel guide rail assembly (11) in the external two fuel injection system engine of high pressure oil-out, the pump body (7) is internally provided with a low-pressure pipeline (3) which is connected with a low-pressure oil inlet (1) and a low-pressure oil outlet (6).
2. The high-pressure fuel pump structure adapted to the gasoline engine with dual fuel injection systems of claim 1, wherein the pump body (7) is provided with a low-pressure fuel inlet pipe (9), and the low-pressure fuel inlet pipe (9) is communicated with the low-pressure fuel inlet (1).
3. The high-pressure fuel pump structure adapted to the gasoline engine with dual fuel injection systems of claim 2, wherein one end of the low-pressure pipeline (3) is connected with the low-pressure oil inlet pipeline (9), and the other end is connected with the low-pressure oil outlet (6).
4. The high-pressure fuel pump structure adaptive to the gasoline engine with the dual fuel injection systems as claimed in claim 1, wherein a pump cover (8) is arranged on the top of the pump body (7), the low-pressure oil inlet (1) is arranged on one side of the pump cover (8), and the high-pressure oil outlet (2) and the low-pressure oil outlet (6) are arranged on the pump body (7).
5. The high pressure fuel pump structure adapted for a dual fuel injection system gasoline engine as set forth in claim 1, wherein said liner (10) is a cemented carbide liner.
6. A high pressure fuel pump arrangement adapted for a dual fuel injection system gasoline engine as claimed in claim 1 wherein a low pressure fuel pump (14) is provided in said fuel tank (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921768549.XU CN210919302U (en) | 2019-10-21 | 2019-10-21 | High-pressure fuel pump structure adapted to gasoline engine with double fuel injection systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921768549.XU CN210919302U (en) | 2019-10-21 | 2019-10-21 | High-pressure fuel pump structure adapted to gasoline engine with double fuel injection systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210919302U true CN210919302U (en) | 2020-07-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921768549.XU Active CN210919302U (en) | 2019-10-21 | 2019-10-21 | High-pressure fuel pump structure adapted to gasoline engine with double fuel injection systems |
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| CN (1) | CN210919302U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114704403A (en) * | 2022-04-18 | 2022-07-05 | 潍柴动力股份有限公司 | Engine fuel system |
| US12085216B2 (en) | 2022-02-17 | 2024-09-10 | Arctic Cat Inc. | Multi-use fuel filler tube |
-
2019
- 2019-10-21 CN CN201921768549.XU patent/CN210919302U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US12085216B2 (en) | 2022-02-17 | 2024-09-10 | Arctic Cat Inc. | Multi-use fuel filler tube |
| CN114704403A (en) * | 2022-04-18 | 2022-07-05 | 潍柴动力股份有限公司 | Engine fuel system |
| CN114704403B (en) * | 2022-04-18 | 2023-03-21 | 潍柴动力股份有限公司 | Engine fuel system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 200131 No. 150 Xiya Road, China (Shanghai) pilot Free Trade Zone, Pudong New Area, Shanghai Patentee after: Bog Warner (Shanghai) Automotive Fuel System Co.,Ltd. Address before: 200131 No. 150 Xiya Road, China (Shanghai) pilot Free Trade Zone, Pudong New Area, Shanghai Patentee before: DELPHI SHANGHAI DYNAMICS AND PROPULSION SYSTEMS Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 200131 No. 150 Xiya Road, China (Shanghai) pilot Free Trade Zone, Pudong New Area, Shanghai Patentee after: Fenia Delphi Automotive Systems (Shanghai) Co.,Ltd. Address before: 200131 No. 150 Xiya Road, China (Shanghai) pilot Free Trade Zone, Pudong New Area, Shanghai Patentee before: Bog Warner (Shanghai) Automotive Fuel System Co.,Ltd. |