CN203939609U - The high-pressure service pump of internal-combustion engine - Google Patents
The high-pressure service pump of internal-combustion engine Download PDFInfo
- Publication number
- CN203939609U CN203939609U CN201420372953.6U CN201420372953U CN203939609U CN 203939609 U CN203939609 U CN 203939609U CN 201420372953 U CN201420372953 U CN 201420372953U CN 203939609 U CN203939609 U CN 203939609U
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- valve body
- valve
- pushing member
- buffer component
- combustion engine
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 25
- 239000003921 oil Substances 0.000 claims abstract description 38
- 239000000446 fuel Substances 0.000 claims abstract description 33
- 239000000295 fuel oil Substances 0.000 claims abstract description 31
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000007599 discharging Methods 0.000 description 4
- 230000000630 rising effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000003321 amplification Effects 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
Landscapes
- Fuel-Injection Apparatus (AREA)
Abstract
The utility model provides a kind of high-pressure service pump of internal-combustion engine.The high-pressure service pump of this internal-combustion engine sucks pressurization storehouse (3) by the to-and-fro motion of plunger (2) by fuel oil and is discharged in fuel gallery, high pressure side (12) after pressurizeing, and it possesses and is arranged between pressurization storehouse (3) and low voltage side fuel gallery (11) and the oil sucting valve (7) of opening or closing with the to-and-fro motion of plunger (2); And the pushing member (77) of the motion of advancing and retreat between front line position in the time shifting the valve body of this oil sucting valve (7) (72) onto enable possition and valve body (72) going-back position while getting back to closed position, between pushing member (77) and valve body (72), be provided with the buffer component (10) that resiliently deformable can occur in the advance and retreat direction of pushing member (77).Adopt structure of the present utility model, can make the caused noise of oil sucting valve (7) reduce.
Description
Technical field
The utility model relates to a kind of high-pressure service pump as fuel of internal combustion engine pump, particularly a kind of have fuel oil is sucked to pressurization high-pressure service pump of the internal-combustion engine of the oil sucting valve of valve closing when valve opening, pressurization when storehouse.
Background technique
In the past, in the internal-combustion engine that is equipped on automobile, known for the high-pressure service pump of supply engine after fuel oil is pressurizeed.For example, patent documentation 1 discloses a kind of high-pressure service pump, and this high-pressure service pump is discharged on high-tension side fuel oil discharge route after the fuel oil that sucks pressurization storehouse being pressurizeed by the to-and-fro motion of plunger.And, between pressurization storehouse and the fuel oil suction passage of low voltage side, being provided with oil sucting valve, this oil sucting valve is opened along with the to-and-fro motion of plunger or is closed.
Particularly, coil spring is the valve body applied thrust to oil sucting valve across engagement member, makes valve opening, and along with the decline of plunger, fuel oil is inhaled into pressurization storehouse from fuel oil suction passage.Then, when the storage capacity that pressurizes along with the rising of plunger reduces, engagement member is driven by o and leaves valve body, and now, valve body moves and oil sucting valve is closed to the direction of throttle down, and the fuel oil that makes to pressurize in storehouse is pressurizeed.
But, in said structure, owing to being by using the engagement member being separated with valve body that valve body applied thrust is made valve opening or closed, so, between valve body and engagement member, can bump and produce vibration, this vibration can propagate into each position of high-pressure service pump, even can propagate into internal-combustion engine and cause radiated noise.This radiated noise being produced by mechanical component feels particularly evident in the time of idling, thereby can be on the mass formation impact of automobile.
[patent documentation 1] TOHKEMY 2009-203987 communique
Model utility content
For above-mentioned technical problem, the purpose of this utility model is, a kind of high-pressure service pump that can make the internal-combustion engine that the caused noise of oil sucting valve reduces is provided.
As the technological scheme solving the problems of the technologies described above, the utility model provides a kind of high-pressure service pump of internal-combustion engine.The high-pressure service pump of this internal-combustion engine is constituted as, by the to-and-fro motion of plunger, fuel oil is sucked to pressurization storehouse and be discharged in fuel gallery, high pressure side after pressurizeing, it possesses and is arranged on the oil sucting valve of opening or closing between described pressurization storehouse and low voltage side fuel gallery and with the to-and-fro motion of described plunger; And the pushing member of the motion of advancing and retreat between front line position in the time shifting the valve body of this oil sucting valve onto enable possition and the described valve body going-back position while getting back to closed position, it is characterized in that: between described pushing member and described valve body, be provided with the buffer component that resiliently deformable can occur in the advance and retreat direction of described pushing member.
The advantage with the high-pressure service pump of the internal-combustion engine of the present utility model of said structure is, by buffer component being set between the valve body at oil sucting valve and pushing member, in the time that both bump, the impact energy of collision is reduced.Particularly, described in above-mentioned prior art example (patent documentation 1), when pushing member (engagement member in prior art example) for example driven by o and valve body away from keyboard and retreat after, if stop to o energising, pushing member can move ahead and bump with valve body to valve body direction.But, based on structure of the present utility model, in the time there is above-mentioned collision, because buffer component can partially absorb the impact producing because of collision, so the vibration being caused by impact can be reduced, thereby, can reach the object that reduces the radiated noise that high-pressure service pump and internal-combustion engine produce.
In addition, when pushing member leaves valve body and retreat and when oil sucting valve is closed, valve body also can produce and impact with the valve seat collision of oil sucting valve.Therefore, in the high-pressure service pump of above-mentioned internal-combustion engine of the present utility model, be preferably, described buffer component is configured to, no matter described pushing member is positioned at described front line position or described going-back position, and described pushing member and described valve body all connect with described buffer component.So, the impact energy that the valve seat of valve body and oil sucting valve produces while collision is cushioned member and partially absorbs, thereby can reduce the radiated noise being caused by this impact.
In addition, in the high-pressure service pump of above-mentioned internal-combustion engine of the present utility model, described buffer component can be for example the member being made up of leaf spring.In this case, be preferably, the side that pushes described valve body from described pushing member looks up, and described buffer component has multiple legs, and extend radially at the position that these legs connect from described buffer component and described pushing member or described valve body.Adopt such buffer component, can make to obtain stable buffering between valve body and pushing member, meanwhile, even in the time having fuel flow around buffer component, this flows and is also not easy to be hindered.
Brief description of the drawings
Fig. 1 is the structural representation of the high-pressure service pump of the internal-combustion engine of mode of execution.
Fig. 2 is the amplification sectional view of the oil sucting valve of high-pressure service pump.
Fig. 3 is the valve body of oil sucting valve while representing valve closing and the schematic diagram that valve seat bumps.
Fig. 4 is the schematic diagram that while representing valve opening, thimble and valve body bump.
Fig. 5 is the planimetric map of the buffer component seen from the press direction of thimble pushing valve body.
Embodiment
Below, with reference to accompanying drawing, mode of execution of the present utility model is described.In the present embodiment, for example, describe for the situation that the high-pressure service pump of internal-combustion engine of the present utility model is applied to Incylinder direct injection multi-cylinder (four cylinders) internal-combustion engine carrying on automobile.
Fig. 1 is the structural representation as the high-pressure service pump 1 of the high-pressure service pump of the internal-combustion engine of present embodiment, this high-pressure service pump 1 is constituted as, the fuel oil that is delivered to low voltage side fuel gallery 11 by oil transfer pump from fuel tank (not shown) is inhaled into pressurization storehouse 3 by the to-and-fro motion of plunger 2, and the fuel oil after pressurization is transported to fuel gallery, high pressure side 12.Fuel gallery, high pressure side 12 is connected with distribution piping (not shown), and high pressure fuel is assigned to the oil sprayer (not shown) of each cylinder through this distribution piping.
Particularly, the plunger 2 of high-pressure service pump 1 is housed inside in Fig. 1 in the cylinder 4 of under shed, and the cam 5a being arranged in internal combustion (IC) engine camshaft 5 by lift device 5b drives.Radicle (underpart of figure) at plunger 2 is provided with back-up ring 2a, and this back-up ring 2a executes thrust by spring 6 to cam 5a side (downside of figure).On the other hand, be formed with pressurization storehouse 3 in closed end one side (upside of Fig. 1) of cylinder 4, its volume changes along with the to-and-fro motion of plunger 2.
In the suction stroke declining at plunger 2, pressurization storehouse 3 sucks fuel oil from low voltage side fuel gallery 11; In the pressure stroke rising at plunger 2, the fuel oil after pressurized is discharged from fuel gallery, high pressure side 12.That is, between pressurization storehouse 3 and low voltage side fuel gallery 11, be provided with oil sucting valve 7, in the suction stroke that this oil sucting valve 7 declines at plunger 2, open; In the pressure stroke rising at plunger 2, close in suitable timing, to adjust the amount of the fuel oil of discharging to fuel gallery, high pressure side 12.
On the other hand, between fuel gallery, high pressure side 12 and pressurization storehouse 3, be provided with safety check 8.In the pressure stroke rising at plunger 2, the fuel oil thrust that oil sucting valve 7 is closed in rear pressurization storehouse 3 raises, and in the time that the difference of the fuel oil thrust in this fuel oil thrust and fuel gallery, high pressure side 12 exceedes certain value, safety check 8 is opened.Like this, high pressure fuel is just discharged in fuel gallery, high pressure side 12.
< oil sucting valve >
Fig. 2 is the amplification sectional view of the oil sucting valve 7 of high-pressure service pump 1.As shown in Figure 2, oil sucting valve 7 is arranged at, and is communicated with between the fuel oil storage bin 70 of low voltage side fuel gallery 11 (not shown in Fig. 2) and the opening 71 facing to pressurization storehouse 3, possesses valve body 72, seat valve 73, seat shell 74.Valve body 72 is roughly in the form of annular discs, is provided with to the outstanding cylindrical portion 72a of seat shell 74 1 sides (left side of Fig. 2).Seat valve 73 is the annulus that diameter is larger than valve body 72, and the diameter of the circular hole 73a of opening is less than the external diameter of valve body 72 in the central.
Seat shell 74 is and the essentially identical disc-shaped component of seat valve 73 diameter that the recess 74a that it is central and the cylindrical portion 72a of valve body 72 can be free to slide and be nested.Like this, valve body 72 can, between seat valve 73 and seat shell 74, move along the axis X advance and retreat of cylindrical portion 72a.
In addition, be formed with the fuel gallery 75 of ring-type in the periphery of valve body 72.On present shell 74, be processed with the fuel gallery 74b that ring-type fuel gallery 75 is connected with opening 71.And, as shown in Figure 2, when valve body 72 was located in the valve seat 73b of seat valve 73 when upper by the 1st spring 76 applied thrusts, between ring-type fuel gallery 75 and fuel oil storage bin 70, be isolated, that is, oil sucting valve 7 is closed.
In contrast, under the pushing of the thimble 77 (pushing member) in the circular hole 73a that can enter seat valve 73 central authorities, valve body 72 is pushed to a shell 74 1 sides (left side of figure) and the 73b that lifts off a seat, now, its peripheral ring-type fuel gallery 75 is connected with fuel oil storage bin 70,, oil sucting valve 7 is opened.
The thimble 77 extending along axis X is arranged on, and across oil sucting valve 7 side (right side of Fig. 2) relative with pressurization storehouse 3, can between front line position and going-back position, advance and retreat along axis X mobile.At this, front line position refers to, thimble 77 in the time that valve body 72 is pushed into a shell 74 interior edge face places (being that valve body 72 is pulled to enable possition) by buffer component 10 described later, the residing position of front-end face of this thimble 77; Going-back position refers to, the residing position of the front-end face of thimble 77 when valve body 72 is got back to closed position.
In addition, on thimble 77, be processed with flange part 77a, at this flange part 77a and be arranged between the postioning abutment member 78 on the sidewall of fuel oil storage bin 70, be provided with the 2nd spring 79, the 2 springs 79 forward line position direction to thimble 77 application of forces, thereby valve body 72 is pushed towards opening direction.In addition, the elastic force of the 2nd spring 79 is set to such an extent that be greater than the elastic force of the 1st spring 76.
Thimble 77 is driven by o 9 and moves along axis X direction advance and retreat., the radicle of thimble 77 (right part of Fig. 2) is fixed in the iron core 90 of o 9.In the time switching on to coil 91, iron core 90 is attracted by stator 92 and retreats, and now, thimble 77 retreats together with iron core 90.As shown in Figure 2, in the time that thimble 77 is positioned on the going-back position that iron core 90 and stator 92 connect, the thrust acting on valve body 72 due to thimble 77 is disengaged, so, under the elastic force effect of the 1st spring 76, valve body 72 closes oil sucting valve 7 to seat valve 73 side shiftings.
Regulate the timing of closing of oil sucting valve 7 by controlling the energising timing of o 9, just can change the amount of the fuel oil of discharging from high-pressure service pump 1.; the fuel oil in pressurization storehouse 3 is sent back to fuel oil storage bin 70 within the time period that plunger 2 rises, oil sucting valve 7 is opened; and the thrust of fuel oil just starts to raise after oil sucting valve 7 is closed; when the thrust of this fuel oil reaches certain thrust when above; safety check 8 is opened, and high pressure fuel is discharged in fuel gallery, high pressure side 12.Like this, if will shift to an earlier date current"on"time, the amount of fuel of discharging from high-pressure service pump 1 will increase; Otherwise if will postpone current"on"time, the amount of the fuel oil of discharging will reduce.
< buffer component >
As described above, thimble 77 moved ahead or retreat to open or when valve body 72, this valve body 72 can bump with valve seat 73b, the thimble 77 of seat valve 73.The vibration that the impact that collision causes produces can propagate into the various piece of high-pressure service pump 1, even internal-combustion engine, thus produce radiated noise.
That is, while thimble 77 being retreated when switching on to the coil 91 of o 9, as shown in Figure 3, valve body 72 can collide with the valve seat 73b of seat valve 73, and the impact (representing with symbol S in figure) that this collision causes can produce vibration.
Thereafter, in the time stopping to o 9 coil electricity, the thimble 77 that Zeng Yidan has retreated can move ahead to valve body 72 directions because of the elastic force effect of the 2nd spring 79, now, as shown in Figure 4, the front end of thimble 77 can collide with valve body 72, and the impact (representing with symbol S in figure) that this collision causes can produce vibration too.At this, for convenience of description, in Fig. 3, Fig. 4, omit the diagram of buffer component 10, the 1st spring 76, the 2nd spring 79.
In order to cushion above-mentioned impact, in the present embodiment, as shown in Figure 2, between front end (left end of Fig. 2) face of thimble 77 and the front-end face of valve body 72, be provided with buffer component 10.As an application examples, this buffer component 10 can be made up of leaf spring.See along axis X direction (thimble 77 pushes the direction of valve body 72), as shown in Figure 5, the approximate centre position of the front-end face of the intermediate portion of this buffer component 10 and thimble 77 connects, and this buffer component 10 has 3 from this butt position to the valve body 72 sides leg 10a that stretch on edge radially.Fore-end and the valve body 72 of these legs 10a connect.This buffer component 10 can be in axis X direction resiliently deformable.
As mentioned above, when thimble 77 moves ahead and in the time that buffer component 10 and valve body 72 collide, 3 leg 10a are bending and absorb the impact that collision causes respectively, thereby obtain stable cushioning effect.In addition, because buffer component 10 is away from the entrance of ring-type fuel gallery 75, so when oil sucting valve 7 is opened, when fuel oil flows to ring-type fuel gallery 75 from fuel oil storage bin 70, buffer component 10 can not hinder fuel flow around yet.
In addition, also can be by buffer component 10 be set to intermediate portion butt valve body 72, the fore-end butt thimble 77 of leg 10a towards reversion.In addition, the quantity of the leg 10a of buffer component 10 can be more than 4, also can be 2.
In addition, in the present embodiment, no matter thimble 77 is positioned at front line position or going-back position, and thimble 77 and valve body 72 all connect with buffer component 10.; be set at the front-end face of the thimble 77 of going-back position and the distance that is located between the front-end face of the valve body 72 on the valve seat 73b on seat valve 73; be slightly less than the thickness of the buffer component 10 not being subject under External Force Acting in axis X direction (; on directions X, the subpoint of the position contacting with the front-end face of thimble 77 in axis X is till the distance of the subpoint of the position contacting with valve body 72 in axis X).
Therefore, when oil sucting valve 7 is closed, valve body 72 is during to seat valve 73 side shifting, and buffer component 10 also can apply elastic force to this valve body 72 constantly, the impact producing can reduce thus valve body 72 with valve seat 73b collision time.
By adopting the structure of present embodiment, can reduce the operational noise as the high-pressure service pump 1 of fuel of internal combustion engine pump, that is, and because valve body 72 and seat valve 73, the thimble 77 of oil sucting valve 7 collide the radiated noise that the impact that causes produces.
In addition, structure of the present utility model is not limited to above-mentioned mode of execution, also comprises multiple other modes.For example in the above-described embodiment, between the valve body 72 of oil sucting valve 7 and thimble 77, be provided with the buffer component 10 being formed by leaf spring, but be not limited to this, also can adopt the other materials such as rubber elastomer to form buffer component 10, in addition, the shape of buffer component 10 is also not limited to the shape in above-mentioned mode of execution.
And, not must be as embodiment described above, even in the time that thimble 77 is positioned at going-back position, thimble 77 and valve body 72 also all connect with buffer component 10.For example, buffer component 10 can be arranged to the front end surface of thimble 77, in the time that thimble 77 is positioned at front line position, buffer component 10 connects with valve body 72; In the time that thimble 77 is positioned at going-back position, buffer component 10 does not connect with valve body 72.
Claims (3)
1. the high-pressure service pump of an internal-combustion engine, by the to-and-fro motion of plunger, fuel oil is sucked after pressurizeing in pressurization storehouse and be discharged in fuel gallery, high pressure side, possess and be arranged on the oil sucting valve of opening or closing between described pressurization storehouse and low voltage side fuel gallery and with the to-and-fro motion of described plunger; And the pushing member of the motion of advancing and retreat between front line position in the time shifting the valve body of this oil sucting valve onto enable possition and the described valve body going-back position while getting back to closed position, it is characterized in that:
Between described pushing member and described valve body, be provided with the buffer component that resiliently deformable can occur in the advance and retreat direction of described pushing member.
2. the high-pressure service pump of internal-combustion engine as claimed in claim 1, is characterized in that:
Described buffer component is configured to, and no matter described pushing member is positioned at described front line position or described going-back position, and described pushing member and described valve body all connect with described buffer component.
3. the high-pressure service pump of internal-combustion engine as claimed in claim 1 or 2, is characterized in that:
Described buffer component has multiple legs, and extend radially at the position that these legs connect from this buffer component and described pushing member or described valve body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420372953.6U CN203939609U (en) | 2014-07-07 | 2014-07-07 | The high-pressure service pump of internal-combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420372953.6U CN203939609U (en) | 2014-07-07 | 2014-07-07 | The high-pressure service pump of internal-combustion engine |
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| Publication Number | Publication Date |
|---|---|
| CN203939609U true CN203939609U (en) | 2014-11-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420372953.6U Active CN203939609U (en) | 2014-07-07 | 2014-07-07 | The high-pressure service pump of internal-combustion engine |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104895718A (en) * | 2015-05-21 | 2015-09-09 | 山东菏泽华星油泵油嘴有限公司 | Novel internal buffering structure of electronic control unit pump |
| CN112943589A (en) * | 2021-02-05 | 2021-06-11 | 东营市丰润通科技发展有限公司 | Single-cylinder oil production device of direct current electromagnetic pump for underground use |
| CN113107730A (en) * | 2021-05-11 | 2021-07-13 | 广西玉柴机器股份有限公司 | Mounting structure of double-plunger fuel injection pump |
-
2014
- 2014-07-07 CN CN201420372953.6U patent/CN203939609U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104895718A (en) * | 2015-05-21 | 2015-09-09 | 山东菏泽华星油泵油嘴有限公司 | Novel internal buffering structure of electronic control unit pump |
| CN112943589A (en) * | 2021-02-05 | 2021-06-11 | 东营市丰润通科技发展有限公司 | Single-cylinder oil production device of direct current electromagnetic pump for underground use |
| CN113107730A (en) * | 2021-05-11 | 2021-07-13 | 广西玉柴机器股份有限公司 | Mounting structure of double-plunger fuel injection pump |
| CN113107730B (en) * | 2021-05-11 | 2022-07-15 | 广西玉柴机器股份有限公司 | Mounting structure of double-plunger fuel injection pump |
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