CN211737332U - V-shaped multi-cylinder diesel engine diesel oil supply system capable of reducing pressure fluctuation - Google Patents
V-shaped multi-cylinder diesel engine diesel oil supply system capable of reducing pressure fluctuation Download PDFInfo
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- CN211737332U CN211737332U CN202020443809.2U CN202020443809U CN211737332U CN 211737332 U CN211737332 U CN 211737332U CN 202020443809 U CN202020443809 U CN 202020443809U CN 211737332 U CN211737332 U CN 211737332U
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Abstract
The utility model discloses a V type multi-cylinder diesel engine diesel oil feed system of reducing pressure fluctuation belongs to diesel engine fuel oil feeding device field, solves the big problem of traditional diesel engine diesel oil feed system oil pressure fluctuation. The supply system comprises two sets of oil supply devices, wherein each set of oil supply device comprises a high-pressure oil supply pump, an oil rail pipe, high-pressure oil pipes and an oil sprayer, the oil sprayers are communicated with the high-pressure oil pipes in a one-to-one correspondence mode, the oil sprayers corresponding to the oil supply devices are divided into at least two sets, two adjacent high-pressure oil pipes corresponding to the oil sprayers in each set are communicated with each other, and one high-pressure oil pipe corresponding to the oil sprayer in each set is communicated with the high-pressure oil supply pump through the oil rail pipe. The utility model discloses a V type multi-cylinder diesel engine diesel oil feed system can reduce high-pressure diesel oil arrival time, and it is undulant to reduce the oil pressure, improves engine wholeness ability.
Description
Technical Field
The utility model relates to a diesel engine fuel feeding device field, more specifically says that it relates to a V type multi-cylinder diesel engine diesel oil feed system of reduction pressure fluctuation.
Background
In the face of the urgent requirement of energy conservation and emission reduction worldwide, the diesel engine must further improve the combustion process, and the performance of a fuel injection system is a key factor for determining the combustion process. Compared with a traditional mechanical pump and an electric control monoblock pump, the high-pressure common-rail fuel injection technology has higher injection pressure, the injection pressure can be flexibly adjusted according to working conditions, the oil injection timing and the oil injection quantity can be accurately controlled, and multiple injections can be realized. Therefore, the electrically controlled high-pressure common rail is a necessary trend for the development of the fuel injection technology of the diesel engine.
As shown in fig. 1, in a conventional diesel oil supply system of a V-type multi-cylinder diesel engine, two sets of oil supply devices are respectively arranged on two sides of an engine, each set of oil supply device includes a high-pressure oil supply pump 4, an oil rail pipe 5, a high-pressure oil pipe 7 and an oil injector 11, and after passing through the high-pressure oil supply pump 4, diesel oil is pressurized, reaches the high-pressure oil pipe 7 corresponding to the oil injector 11 of each cylinder through the oil rail pipe 5, and then reaches the oil injector 11 of each cylinder through the high-pressure oil pipe 7 to perform oil injection operation.
The existing diesel oil supply system of a V-shaped multi-cylinder diesel engine has the problems that one high-pressure oil supply pump supplies oil to each cylinder on one side of the engine, all cylinders are supplied with oil after the oil is discharged through one oil rail pipe, when the number of cylinders of the engine exceeds 8 cylinders, such as 8 cylinders, 12 cylinders, 16 cylinders and 20 cylinders, the single-side high-pressure oil supply pump needs to supply oil to more than 8 cylinders, an oil sprayer at the far end of oil supply has fast pressure attenuation, so that the far-end oil sprayer has large pressure fluctuation, and the direct result is that the exhaust temperature of each cylinder is uneven, namely, the combustion of each cylinder has large difference, so that the overall performance of the engine is poor, and the power output requirement cannot be well met.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is not enough to the above-mentioned of prior art, provide a V type multi-cylinder diesel engine diesel oil feed system of reduction pressure fluctuation, can reduce high-pressure diesel oil arrival time, reduce the oil pressure fluctuation, improve engine wholeness ability.
The technical scheme of the utility model is like this: the utility model provides a V type multi-cylinder diesel engine diesel oil feed system of reducing pressure fluctuation, includes two sets of oil supply unit, every set oil supply unit includes high pressure fuel feed pump, oil rail pipe, high pressure fuel pipe and sprayer, sprayer and high pressure fuel pipe one-to-one intercommunication, every set the sprayer that oil supply unit corresponds divide into at least two sets ofly, every group two adjacent high pressure fuel pipes that correspond in the sprayer communicate each other, and every group one of them high pressure fuel pipe that corresponds in the sprayer feeds through with high pressure fuel feed pump through an oil rail pipe.
As a further improvement, the oil supply device further comprises an oil inlet pipe, a filter and an oil outlet pipe which are sequentially communicated, the oil inlet pipe is communicated with the oil tank, and the oil outlet pipe is communicated with the high-pressure oil supply pump.
Furthermore, a prefilter and an oil transfer pump are respectively arranged between the oil inlet pipe and the oil tank, the prefilter is communicated with the oil transfer pump through an oil conveying pipe, the oil transfer pump is communicated with the oil inlet pipe, and the oil transfer pump is integrally installed on the high-pressure oil supply pump.
Furthermore, the oil supply device further comprises an oil return manifold and an oil return pipe which are communicated, the oil return manifold is communicated with each cylinder of the engine, and the oil return pipe is communicated with the oil tank.
Furthermore, a pressure accumulation cavity is arranged in the high-pressure oil supply pump, and each oil rail pipe is communicated with the pressure accumulation cavity.
Furthermore, the transmission ratio of the high-pressure oil supply pumps corresponding to the two sets of oil supply devices to the engine is the same.
Furthermore, a plurality of high-pressure oil pipes close to the corresponding oil rail pipes in each group of the oil injectors are communicated with one transition joint, the farthest high-pressure oil pipe in each group of the oil injectors is communicated with the transition joint corresponding to the adjacent oil injector in the group, the closest transition joint in each group of the oil injectors is communicated with the oil rail pipe, and the two corresponding adjacent transition joints in each group of the oil injectors are communicated through a high-pressure connecting pipe.
Further, the length of the high-pressure oil pipe corresponding to each group of oil injectors is gradually shortened along the far end of the oil rail pipe corresponding to the group of oil injectors.
Advantageous effects
Compared with the prior art, the utility model, have following advantage:
1. the utility model discloses a V type multi-cylinder diesel engine diesel oil feed system divide into the multiunit through the sprayer that corresponds V type multi-cylinder diesel engine to every sprayer of group is respectively through an oil rail pipe and high-pressure fuel feed pump intercommunication fuel feeding, can reduce the time that the sprayer high pressure diesel oil of the more far away one end of relative oil rail pipe reachs, reduces the oil pressure fluctuation, improves engine wholeness ability.
2. The utility model discloses a set up the length of the high pressure fuel pipe that every group sprayer corresponds into the mode that shortens gradually along the one end far away for the oil rail pipe that this group sprayer corresponds, can further reduce the sprayer high pressure diesel oil arrival time of the one end far away of relative oil rail pipe in the sprayer in every group, further reduce the oil pressure fluctuation, keep the stability of every group sprayer oil pressure.
Drawings
FIG. 1 is a schematic diagram of a prior art structure;
fig. 2 is a schematic structural diagram of the present invention.
Wherein: 1-filter, 2-oil inlet pipe, 3-oil outlet pipe, 4-high pressure oil supply pump, 5-oil rail pipe, 6-transition joint, 7-high pressure oil pipe, 8-high pressure connecting pipe, 9-oil return manifold, 10-oil return pipe and 11-oil injector.
Detailed Description
The invention will be further described with reference to specific embodiments shown in the drawings.
Referring to fig. 2, the utility model discloses a reduce V type multi-cylinder diesel engine diesel oil feed system of pressure fluctuation, including two sets of oil supply unit, every set of oil supply unit includes high pressure fuel feed pump 4, oil rail pipe 5, high pressure fuel pipe 7 and sprayer 11, wherein, the quantity of high pressure fuel pipe 7 and sprayer 11 all is the same with engine cylinder quantity, namely, a cylinder corresponds a sprayer and high pressure fuel pipe, sprayer 11 communicates with high pressure fuel pipe 7 one-to-one, the sprayer 11 that every set of oil supply unit corresponds is divided into at least two sets, divide according to engine cylinder number, the sprayer of every group is 2-5, two adjacent high pressure fuel pipes 7 that correspond in every sprayer 11 of group communicate each other, and one of them high pressure fuel pipe 7 that corresponds in every sprayer 11 of group communicates with high pressure fuel feed pump 4 through an oil rail pipe 5, the quantity of oil rail pipe 5 is unanimous with the grouping quantity of sprayer 11, one group of oil injectors corresponds to one oil rail pipe.
When the diesel oil supply system of the V-shaped multi-cylinder diesel engine works, after diesel oil passes through the high-pressure oil supply pump 4, the pressure of the diesel oil is increased, then the diesel oil reaches the high-pressure oil pipe 7 corresponding to each group of oil injectors 11 through the oil rail pipe 5, and then the diesel oil reaches the oil injectors 11 corresponding to each cylinder through the high-pressure oil pipe 7, so that oil supply is carried out on each cylinder. The oil injectors corresponding to the V-shaped multi-cylinder diesel engine are divided into a plurality of groups, and each group of oil injectors are communicated with the high-pressure oil supply pump through an oil rail pipe for supplying oil, so that the time for high-pressure diesel oil of the oil injector at the far end relative to the oil rail pipe to arrive can be shortened, the oil pressure fluctuation is reduced, and the overall performance of the engine is improved.
Preferably, the oil supply device further comprises an oil inlet pipe 2, a filter 1 and an oil outlet pipe 3 which are sequentially communicated, the oil inlet pipe 2 is communicated with the oil tank, the oil outlet pipe 3 is communicated with the high-pressure oil supply pump 4, diesel oil enters the filter 1 from the oil tank through the oil inlet pipe 2, and the diesel oil filtered by the filter 1 reaches the high-pressure oil supply pump 4 through the oil outlet pipe 3, so that oil circuit communication is realized.
Preferably, still be equipped with prefilter and fuel delivery pump respectively between advancing oil pipe 2 and oil tank, prefilter and oil tank intercommunication, prefilter and fuel delivery pump are through defeated oil pipe intercommunication, the fuel delivery pump with advance oil pipe 2 intercommunication, can ensure through the setting of delivery pump that diesel oil is carried to filter 1 to through the setting of prefilter, realize prefilter diesel oil's purpose, and fuel delivery pump is integrated to be installed on high-pressure fuel feed pump 4, reduce fuel delivery pump occupation space, the structural arrangement is compacter.
Preferably, the oil supply device further comprises an oil return manifold 9 and an oil return pipe 10 which are communicated, the oil return manifold 9 is communicated with each cylinder of the engine, the oil return pipe 10 is communicated with the oil tank, and redundant diesel oil of each cylinder of the engine is collected to the oil return pipe 10 through the oil return manifold 9 and then returns to the oil tank, so that an oil circuit circulation loop is realized.
Preferably, a pressure accumulation cavity is arranged in the high-pressure oil supply pump 4, each oil rail pipe 5 is communicated with the pressure accumulation cavity, high-pressure oil is collected to the pressure accumulation cavity in a unified mode and flows out from the pressure accumulation cavity, pressure fluctuation of high-pressure diesel oil between plungers in the high-pressure oil supply pump 4 is avoided, and constant high-pressure oil outlet pressure is guaranteed.
Preferably, the transmission ratio of the high-pressure oil supply pumps 4 corresponding to the two sets of oil supply devices is the same as that of the engine, so that the high-pressure oil outlet pressures of the high-pressure oil supply pumps on the two sides of the engine are kept basically consistent.
Preferably, a plurality of high-pressure oil pipes 7 near the oil rail pipe 5 in each group of oil injectors 11 are all communicated with one transition joint 6, one high-pressure oil pipe 7 farthest from the oil rail pipe 5 in each group of oil injectors 11 is communicated with the transition joint 6 corresponding to the adjacent oil injector 11 in the group, the transition joint 6 nearest to the oil rail pipe 5 in each group of oil injectors 11 is communicated with the oil rail pipe 5, two adjacent transition joints 6 corresponding to each group of oil injectors 11 are communicated through a high-pressure connecting pipe 8, as shown in fig. 2, the diesel oil supply system of the eight-cylinder engine is formed by averagely dividing eight oil injectors into two groups, four oil injectors 11 in each group are arranged in sequence from left to right, the high-pressure oil pipes 7 corresponding to the first, second and third oil injectors 11 near the oil rail pipe 5 are all connected with one transition joint 6, the transition joint 6 corresponding to the first oil injector 11 is connected with the oil rail pipe 5, the high-pressure oil pipe 7 corresponding to the fourth oil injector 11 is directly connected with the transition joint 6 corresponding to the adjacent third oil injector 11, so that the communication of an oil way can be ensured, the rail pressure can be kept consistent, and compared with a traditional diesel oil supply system, the number of the transition joints and the high-pressure connecting pipes is effectively reduced, the production cost is reduced, and the pipeline layout of the diesel oil supply system is optimized.
Preferably, the length of the high-pressure oil pipe 7 corresponding to each group of injectors 11 is gradually shortened along the far end of the oil rail pipe 5 corresponding to the group of injectors, that is, in the same group of injectors 11, the length of the high-pressure oil pipe 7 close to one end of the oil rail pipe 5 is longer, and the length of the high-pressure oil pipe 7 far from one end of the oil rail pipe 5 is gradually shortened, so that the reaching time of the high-pressure diesel oil of the injector at the far end of the injector corresponding to the oil rail pipe in each group can be further reduced by setting the length of the high-pressure oil pipe corresponding to each group of injectors to be gradually shortened along the far end of the oil rail pipe corresponding to the group, the fluctuation of the oil pressure of each group of injectors can.
The above is only the preferred embodiment of the present invention, and it should be noted that for those skilled in the art, without departing from the structure of the present invention, several modifications and improvements can be made, which will not affect the utility model and the utility of the patent.
Claims (8)
1. The utility model provides a V type multi-cylinder diesel engine diesel oil feeding system of reducing pressure fluctuation, includes two sets of oil supply unit, every set oil supply unit includes high pressure fuel feed pump (4), oil rail pipe (5), high pressure fuel pipe (7) and sprayer (11), sprayer (11) and high pressure fuel pipe (7) one-to-one intercommunication, its characterized in that, every set sprayer (11) that oil supply unit corresponds divide into at least two sets of, every group two adjacent high pressure fuel pipe (7) that correspond in sprayer (11) communicate each other, and every group one of them high pressure fuel pipe (7) that correspond in sprayer (11) communicate with high pressure fuel feed pump (4) through an oil rail pipe (5).
2. The diesel oil supply system of the V-type multi-cylinder diesel engine for reducing the pressure fluctuation according to claim 1, wherein the oil supply device further comprises an oil inlet pipe (2), a filter (1) and an oil outlet pipe (3) which are communicated in sequence, the oil inlet pipe (2) is communicated with an oil tank, and the oil outlet pipe (3) is communicated with a high-pressure oil supply pump (4).
3. The V-type multi-cylinder diesel engine diesel oil supply system capable of reducing pressure fluctuation according to claim 2, characterized in that a prefilter and an oil delivery pump are respectively arranged between the oil inlet pipe (2) and the oil tank, the prefilter is communicated with the oil delivery pump through an oil delivery pipe, the oil delivery pump is communicated with the oil inlet pipe (2), and the oil delivery pump is integrally installed on the high-pressure oil supply pump (4).
4. The diesel supply system of the V-type multi-cylinder diesel engine for reducing the pressure fluctuation according to claim 1, characterized in that the oil supply device further comprises an oil return manifold (9) and an oil return pipe (10) which are communicated, wherein the oil return manifold (9) is communicated with each cylinder of the engine, and the oil return pipe (10) is communicated with an oil tank.
5. The diesel supply system of the V-type multi-cylinder diesel engine for reducing the pressure fluctuation according to claim 1, wherein a pressure accumulation cavity is formed in the high-pressure supply pump (4), and each rail pipe (5) is communicated with the pressure accumulation cavity.
6. The diesel oil supply system of the V-type multi-cylinder diesel engine for reducing the pressure fluctuation as set forth in claim 1, wherein the transmission ratio of the high-pressure oil supply pump (4) corresponding to the two oil supply devices to the engine is the same.
7. The V-type multi-cylinder diesel engine diesel supply system capable of reducing pressure fluctuation according to claim 1, characterized in that a plurality of high-pressure oil pipes (7) in each group of the oil injectors (11) which are close to the oil rail pipes (5) are communicated with one transition joint (6), one high-pressure oil pipe (7) in each group of the oil injectors (11) which is farthest from the oil rail pipes (5) is communicated with the transition joint (6) corresponding to the adjacent oil injector (11) in the group, the transition joint (6) in each group of the oil injectors (11) which is closest to the oil rail pipes (5) is communicated with the oil rail pipes (5), and two corresponding adjacent transition joints (6) in each group of the oil injectors (11) are communicated through high-pressure connecting pipes (8).
8. A diesel fuel supply system for a V-type multi-cylinder diesel engine reducing pressure fluctuations according to any of claims 1-7, characterized in that the length of the high pressure fuel pipe (7) corresponding to each group of injectors (11) is gradually shortened along the farther end of the rail pipe (5) corresponding to the group of injectors (11).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020443809.2U CN211737332U (en) | 2020-03-31 | 2020-03-31 | V-shaped multi-cylinder diesel engine diesel oil supply system capable of reducing pressure fluctuation |
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| CN202020443809.2U CN211737332U (en) | 2020-03-31 | 2020-03-31 | V-shaped multi-cylinder diesel engine diesel oil supply system capable of reducing pressure fluctuation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111305985A (en) * | 2020-03-31 | 2020-06-19 | 广西玉柴机器股份有限公司 | V-shaped multi-cylinder diesel engine diesel oil supply system capable of reducing pressure fluctuation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111305985A (en) * | 2020-03-31 | 2020-06-19 | 广西玉柴机器股份有限公司 | V-shaped multi-cylinder diesel engine diesel oil supply system capable of reducing pressure fluctuation |
| CN111305985B (en) * | 2020-03-31 | 2024-06-25 | 广西玉柴船电动力有限公司 | V-shaped multi-cylinder diesel engine diesel oil supply system capable of reducing pressure fluctuation |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230113 Address after: No.88 Tianqiao West Road, Yulin City, Guangxi Zhuang Autonomous Region Patentee after: Guangxi Yuchai Ship Electric Power Co.,Ltd. Address before: No.88 Tianqiao West Road, Yulin City, Guangxi Zhuang Autonomous Region Patentee before: Guangxi Yuchai Machinery Co.,Ltd. |
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| TR01 | Transfer of patent right |