CN101514695B - Pump - Google Patents
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- CN101514695B CN101514695B CN2008101779949A CN200810177994A CN101514695B CN 101514695 B CN101514695 B CN 101514695B CN 2008101779949 A CN2008101779949 A CN 2008101779949A CN 200810177994 A CN200810177994 A CN 200810177994A CN 101514695 B CN101514695 B CN 101514695B
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- mentioned
- armature
- low
- pressure passage
- pressure
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- 239000012530 fluid Substances 0.000 claims abstract description 17
- 230000000694 effects Effects 0.000 claims description 23
- 238000013316 zoning Methods 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 abstract description 2
- 238000003825 pressing Methods 0.000 abstract 1
- 230000002269 spontaneous effect Effects 0.000 abstract 1
- 239000000446 fuel Substances 0.000 description 47
- 230000008676 import Effects 0.000 description 19
- 238000002485 combustion reaction Methods 0.000 description 6
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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Abstract
The present invention provides a pump. Wherein, including lead-in access (312) capable of guiding the fluid flowing from plunger chamber to low pressure access (310) to armature chamber (41), and the lead-in access (312) towards outer than outer peripheral face of armature (33). Thereby, guiding fluid to attractive side face of the armature (33) to make dynamic pressure work on the attractive side face of the armature (33), and then applying pressure in valve opening direction to the armature (33) to counteract the pressure applied to valve body in valve closing direction. Therefore, being capable of avoiding spontaneous closure of electromagnetic valve (30) because of dynamic pressure.
Description
Technical field
The present invention relates to a kind of pump that fluid is sucked and discharges, particularly be applicable to the pump of fuel-injection device for internal combustion engine.
Background technique
A kind of pump is disclosed in TOHKEMY 2007-100590 communique; As this pump that is used for to the fuel injection system of compression ignition internal combustion engine burner oil; Solenoid valve is arranged on the low-pressure passage that is communicated with between plunger compartment and the low voltage section; The valve body of solenoid valve begins the pressurization of plunger to fuel thus in the closed in electrified state low-pressure passage.
Yet in the pump of existing technology, the fuel that flows to low-pressure passage from the plunger compartment collides with valve body, through its kinetic pressure to valve body effect close the pressure of valve direction.In addition; In this pump, owing to flow and passed through the fuel of low-pressure passage, moving to the surface current of the non-attraction side of the armature of solenoid valve from the plunger compartment to low-pressure passage; Therefore the kinetic pressure of the face of the non-attraction side through acting on armature, the pressure of valve direction is closed in effect to armature.
Like this, because kinetic pressure is to closing the valve directive effect in valve body and armature, the problem that therefore exists does, though the state that energising stops to solenoid valve, when high speed rotary because the kinetic pressure valve body is also closed low-pressure passage easily.Say that more in detail when solenoid valve spontaneously cut out, plunger became more Zao period period than target to the pressurization beginning of fuel, can produce can not the such problem of control pump discharge capacity.
Summary of the invention
The purpose of this invention is to provide a kind of pump, can prevent solenoid valve because kinetic pressure and spontaneously closing.
In order to reach above-mentioned purpose, among the present invention, constitute as follows: the fluid that flows into low voltage section through low-pressure passage from the plunger compartment is directed to the face of the attraction side of armature, and to the pressure of armature effect valve opening position.
Thus, through kinetic pressure to the face effect of the attraction side of armature, to the pressure of armature effect valve opening position, thereby through the kinetic pressure of valve body effect is offset to closing the pressure that the valve direction puts on valve body.Therefore, can prevent solenoid valve because kinetic pressure and spontaneously closing.
In another technological scheme of the present invention; Armature is disposed in the armature chamber that between main body and solenoid, is formed by zoning; Main body has the importing path; This imports path will be from the plunger compartment flows into low voltage section through low-pressure passage direct fluid armature chamber, imports path than the outer circumferential face of armature toward the outer side.
Thus, make fluid not with the face collision of the non-attraction side of armature, can be positively with the face of the attraction side of its guiding armature, thereby positively obtain pressure to the valve opening position of armature effect.
In another technological scheme of the present invention, low-pressure passage and to import path be the hole that forms on the main body is in the low-pressure passage, to the low voltage section side low-pressure passage of low voltage section opening, towards the opening portion of the low voltage section side that imports path.
Thus, fluid flow into the importing path from low voltage section side low-pressure passage easily, thereby positively obtains the pressure to the valve opening position of armature effect.
In another technological scheme of the present invention, low voltage section side low-pressure passage is the obtuse angle with the crossing angle that imports path.
Thus, be that the situation of acute angle is compared with low voltage section side low-pressure passage and the crossing angle that imports path, fluid flow into the importing path from low voltage section side low-pressure passage easily, thereby positively obtains the pressure to the valve opening position of armature effect.
In another technological scheme of the present invention, main body has current return circuit, and this current return circuit is back to the low voltage section side with the fluid of armature chamber.
Thus, through be back to the sucking-off effect that flows of the fluid of low voltage section side through current return circuit from armature chamber, the pressure of the face of the non-attraction side of armature reduces, thereby can further increase the pressure to the valve opening position of armature effect.
In another technological scheme of the present invention, when the movement direction of armature is observed, current return circuit is configured in the projection plane of armature.
Thus, through the sucking-off effect, the pressure of face of the non-attraction side of armature is reduced.
In another technological scheme of the present invention, import path and current return circuit and be configured to, stagger mutually in the position on the Zhou Fangxiang of armature.
Thus; The fluid of face of attraction side that flows into armature from the outer circumferential side of armature after central part flows through; Change direction and flow to the outer circumferential side of armature, at this moment, because the path when the central part to armature flows is different with the path when the outer circumferential side to armature (33) flows; Become big so on the face of the attraction side of armature (33), receive the area of the part of kinetic pressure, thereby can further increase pressure the valve opening position of armature (33) effect.
Description of drawings
Fig. 1 is that the master of the pump of expression one embodiment of the present of invention looks sectional view;
Fig. 2 is that the master of major component of the solenoid valve single-piece of presentation graphs 1 looks sectional view;
Fig. 3 (a) is the main body of Fig. 1 and the plan view of armature, the A-A line sectional view that Fig. 3 (b) is Fig. 3 (a).
Embodiment
Below referring to figs. 1 through 3 the explanation one embodiment of the present of invention.Fig. 1 is that the master of pump of expression present embodiment looks sectional view, and Fig. 2 is that the master of major component of the solenoid valve single-piece of presentation graphs 1 looks sectional view, and Fig. 3 (a) is the main body of Fig. 1 and the plan view of armature, the A-A line sectional view that Fig. 3 (b) is Fig. 3 (a).
The pump of present embodiment is applicable to fuel feed pump, and this fuel feed pump is at the fuel injection system that is used for to the compression ignition internal combustion engine burner oil, with high-pressure fuel to the common rail of accumulating fuel under high pressure.
Like Fig. 1, shown in 2; On pump case 10, be formed with cam chamber 10a, columned slider patchhole 10b and columned cylinder patchhole 10c; Cam chamber 10a is positioned at the lower end side of pump case 10; Slider patchhole 10b extends to the top of pump case 10 from this cam chamber 10a, and cylinder patchhole 10c extends to the upper-end surface of pump case 10 from this slider patchhole 10b.
In cam chamber 10a, dispose the camshaft 11 that is driven by not shown compression ignition internal combustion engine (below be called internal-combustion engine), this camshaft 11 is supported on the pump case 10 with freely rotating.In addition, on camshaft 11, be formed with cam 12.
Cylinder 13 is installed among the cylinder patchhole 10c with the mode of stopping up upper cylinder patchhole 10c.On this cylinder 13, be formed with columned plunger patchhole 13a, in this plunger patchhole 13a, move back and forth and be inserted with columned plunger 14 freely.In addition, form plunger compartment 15 through the upper-end surface of this plunger 14 and the inner peripheral surface of cylinder 13.
Thin plate 14a is connected with the lower end of plunger 14, and this thin plate 14a is pressed to slider 17 through spring 16.This slider 17 forms cylindric, and moves back and forth and be inserted in freely among the slider patchhole 10b.In addition, cam bawl 18 is installed on the slider 17 with freely rotating, this cam bawl 18 and cam 12 butts.And, through the revolution of camshaft 11 during cam 12 revolution, plunger 14 with thin plate 14a, slider 17 and cam bawl 18 by reciprocal driving.
Between cylinder 13 and pump case 10, be formed with fuel and accumulate place 19.Never the low-pressure fuel that illustrated low pressure supply pump is discharged supplies to this fuel through not shown low-pressure fuel pipe arrangement and accumulates in the place 19.In addition; Fuel accumulates place 19 and is communicated with plunger compartment 15 through the low-pressure passage 310 in low pressure access 13b, body chamber 50 and the solenoid valve 30; Low pressure access 13b is formed on the cylinder 13, body chamber 50 as low voltage section be formed on cylinder 13 and after state between the main body 31 of solenoid valve 30.
On cylinder 13, be formed with the high pressure access 13c that often is communicated with plunger compartment 15.And plunger compartment 15 is connected with not shown common rail through this high pressure access 13c, expulsion valve 20 and not shown fuel under high pressure pipe arrangement.High pressure access 13c and fuel under high pressure pipe arrangement constitute the high-pressure fuel path.
Expulsion valve 20 is installed on the cylinder 13 in the downstream side of high pressure access 13c.This expulsion valve 20 possesses valve body 20a and spring 20b, and valve body 20a opens or closes the high-pressure fuel path, and spring 20b applies power to this valve body 20a to closing the valve direction.And pressurized fuel in plunger compartment 15 overcomes the applying power of spring 20b and valve body 20a is moved to valve opening position, and is sent to rail pressure altogether.
In addition; This solenoid valve 30 has solenoid 32, discoid armature 33, spring 34, roughly columned valve body 35 and discoid limiter 36; Solenoid 32 produces attraction force when energising, armature 33 is attracted by solenoid 32, and 34 pairs of these armatures 33 of spring apply power to the opposition side that attracts side; Valve body 35 contact or leaves with the portion of taking a seat 311 through moving with armature 33 and opens or closes low-pressure passage 310 thus, limiter 36 determine these valve bodies 35 drive valve the time the position.Valve body 35 remains in the main body 31 sliding freely.Limiter 36 is by solenoid valve 30 and cylinder 13 clampings, and is formed with a plurality of intercommunicating pore 36a, and intercommunicating pore 36a is communicated with between low-pressure passage 310 and the plunger compartment 15.
Like Fig. 2, shown in 3, on main body 31, be formed with importing path 312, import path 312 and be communicated with between armature chambers 41 and the body chamber 50 (with reference to Fig. 1).In addition, when fuel accumulated place's 19 side overflows, the part of this overflow fuel was directed to armature chamber 41 through importing path 312 to the fuel in plunger compartment 15 (with reference to Fig. 1) through low-pressure passage 310 grades.
Low voltage section side low-pressure passage 310a uniformly-spaced is formed with four along the Zhou Fangxiang of main body 31 (being 90 degree in this example).When axis X direction (in other words, the movement direction of armature 33 and valve body 35) is observed, low voltage section side low-pressure passage 310a with import path 312 and be configured on the same angular orientation of Zhou Fangxiang of main body 31.
When observing the section (being the section of Fig. 2) of the axis through axis X and low voltage section side low-pressure passage 310a, the relative axis X inclination of low voltage section side low-pressure passage 310a.Say more in detail; Low voltage section side low-pressure passage 310a is obtuse angle alpha (with reference to Fig. 2) with the crossing angle that imports path 312 (crossing angle of the axis of low voltage section side low-pressure passage 310a and the axis that imports path 312), and low voltage section side low-pressure passage 310a is towards the opening portion of body chamber 50 sides that import path 312.
On main body 31, be formed with current return circuit 313, current return circuit 313 is back to body chamber 50 through being communicated with between armature chamber 41 and the body chamber 50 with the fuel of armature chamber 41.Current return circuit 313 uniformly-spaced is formed with two along the Zhou Fangxiang of main body 31 (being 180 degree in this example).When the axis X direction is observed, current return circuit 313 with import path 312 and be configured on the different amount position of Zhou Fangxiang of main body 31, in other words, stagger mutually in the position that is configured on the Zhou Fangxiang of armature 33.When axis X is observed, current return circuit 313 is configured in the projection plane of armature 33.
Below the action of the pump of said structure is described.At first, when the energising of the solenoid 32 of solenoid valve 30 stopped, valve body 35 moved to driving valve position through the applying power of spring 34.Promptly, the face of taking a seat 350 of valve body 35 leaves from the portion of taking a seat 311 of main body 31, low-pressure passage 310 is opened.
Then, under the state that low-pressure passage 310 is opened, when plunger 14 descends, the low-pressure fuel of discharging from the low pressure supply pump through fuel accumulate 19, low pressure access 13b, body chamber 50 and low-pressure passage 310 supply to plunger compartment 15.
Then, when plunger 14 began to rise, plunger 14 will pressurize to the fuel in the plunger compartment 15.Yet; Rising at plunger 14 begins the initial stage; Owing to solenoid valve 30 energising, low-pressure passage 310 are not opened, thereby the fuel in the plunger compartment 15 accumulates place's 19 side overflows and not pressurized through low-pressure passage 310, body chamber 50 and low pressure access 13b to fuel.
During to solenoid valve 30 energisings, armature 33 and valve body 35 overcome spring 34 and are attracted when the overflow of the fuel in this plunger compartment 15, and the face of taking a seat 350 of valve body 35 is landed in the portion of taking a seat 311 of main body 31, and low-pressure passage 310 is closed.Thus, fuel accumulates the overflow of locating 19 sides to fuel to be stopped, and the pressurization of the fuel in 14 pairs of plunger compartments of beginning plunger 15.Then, make expulsion valve 20 drive valve through the fuel pressure in the plunger compartment 15, fuel is sent to being total to rail pressure.
At this, when the overflow of fuel, the kinetic pressure of overflow fuel acts on valve body 35, and valve body 35 is acted on to the pressure that closes the valve direction.In addition, in the present embodiment,, thereby offset to closing the pressure that the valve direction puts on valve body 35 owing to the pressure that valve body 35 is acted on to valve opening position like the following stated.Therefore, can prevent that kinetic pressure from causing solenoid valve 30 spontaneously to be closed.
At first, when the overflow of fuel, the part of its overflow fuel is directed to armature chamber 41 through importing path 312.Owing to import path 312 toward the outer side, thereby be directed to the flows outside of the fuel of armature chamber 41 towards the outer circumferential face of armature 33 than the outer circumferential face of armature 33.In other words, shown in the arrow B among Fig. 2, the fuel that is directed to armature chamber 41 not with the face collision of the non-attraction side of armature 33, and be directed to the face of the attraction side of armature 33.Thus, kinetic pressure is to the face effect of the attraction side of armature 33, to the pressure of armature 33 effect valve opening positions.
In addition; Because low voltage section side low-pressure passage 310a is the obtuse angle with the crossing angle that imports path 312; And low voltage section side low-pressure passage 310a is towards the opening portion of body chamber 50 sides that import path 312, thereby overflow fuel flow into importing path 312 from low voltage section side low-pressure passage 310a easily.Therefore, can positively obtain pressure to the valve opening position of armature 33 effect.
Further; Shown in the arrow C among Fig. 3 (a); Flow into the fuel of face of the attraction side of armature 33 from importing path 312; From the outer circumferential side of armature 33 after its central part flows, change direction and flow, then the outside of the outer circumferential face through armature 33 and flowing to current return circuit 313 to the outer circumferential side of armature 33.And, being configured to current return circuit 313 owing to import path 312, stagger mutually in the position on the Zhou Fangxiang of armature 33, thereby the path when the central part to armature 33 flows is different with the path when the outer circumferential side to armature 33 flows.Thus, the area that on the face of the attraction side of armature 33, receives the part of kinetic pressure becomes big, thereby can increase the pressure to the valve opening position of armature 33 effects.
On the other hand, when the overflow of fuel, the fuel that is directed to armature chamber 41 is back to body chamber 50 through current return circuit 313.And, the sucking-off effect that flows of the fuel through being back to body chamber 50 through current return circuit 313, the pressure of the face of the non-attraction side of armature 33 reduces, thereby to the pressure of armature 33 effect valve opening positions.
Therefore in addition, when the axis X direction is observed, current return circuit 313 is configured in the projection plane of armature 33, through the sucking-off effect, can positively make the pressure reduction of face of the non-attraction side of armature 33.
One embodiment of the present of invention more than have been described, yet application of the present invention is not restricted to these structures, and also can in the scope of right request, suitably be out of shape.For example, in the foregoing description, the present invention is applicable to the fuel feed pump of fuel-injection device for internal combustion engine, but also can be applicable to the pump that sucks and discharge fluid widely.
Claims (8)
1. pump has:
Cylinder (13) forms plunger compartment (15);
Plunger (14) moves back and forth in above-mentioned cylinder (13), and discharges the fluid that is inhaled into above-mentioned plunger compartment (15); And
Solenoid valve (30) opens or closes the low-pressure passage (310) that is communicated with between above-mentioned plunger compartment (15) and the low voltage section (50);
Above-mentioned solenoid valve (30) has main body (31), solenoid (32), armature (33) and valve body (35); Aforementioned body (31) is formed with above-mentioned low-pressure passage (310); Above-mentioned solenoid (32) produces attraction force when energising; Above-mentioned armature (33) is attracted by above-mentioned solenoid (32), and above-mentioned valve body (35) is mobile and open or close above-mentioned low-pressure passage (310) with above-mentioned armature (33);
When being attracted, above-mentioned valve body (35) is closed above-mentioned low-pressure passage (310) at above-mentioned armature (33), begins the pressurization of above-mentioned plunger (14) convection cell thus;
And, from above-mentioned plunger compartment (15) to the kinetic pressure of above-mentioned low-pressure passage (310) flowing fluid to closing the valve directive effect in above-mentioned valve body (35); It is characterized in that,
The fluid that flows into above-mentioned low voltage section (50) through above-mentioned low-pressure passage (310) from above-mentioned plunger compartment (15) is directed to the face of the attraction side of above-mentioned armature (33), and to the pressure of above-mentioned armature (33) effect valve opening position.
2. pump as claimed in claim 1 is characterized in that,
Above-mentioned armature (33) is disposed in the armature chamber (41) that between aforementioned body (31) and above-mentioned solenoid (32), is formed by zoning;
Aforementioned body (31) has importing path (312), and this importing path (312) will flow into the above-mentioned armature chamber of direct fluid (41) of above-mentioned low voltage section (50) from above-mentioned plunger compartment (15) through above-mentioned low-pressure passage (310);
Above-mentioned importing path (312) than the outer circumferential face of above-mentioned armature (33) toward the outer side.
3. pump as claimed in claim 2 is characterized in that,
Above-mentioned low-pressure passage (310) and above-mentioned importing path (312) are that aforementioned body (31) goes up the hole that forms;
In the above-mentioned low-pressure passage (310), to the low voltage section side low-pressure passage (310a) of above-mentioned low voltage section (50) opening, towards the opening portion of above-mentioned low voltage section (50) side of above-mentioned importing path (312).
4. pump as claimed in claim 3 is characterized in that,
The crossing angle of above-mentioned low voltage section side low-pressure passage (310a) and above-mentioned importing path (312) is the obtuse angle.
5. like each described pump in the claim 2 to 4, it is characterized in that,
Aforementioned body (31) has current return circuit (313), and this current return circuit (313) is back to above-mentioned low voltage section (50) side with the fluid of above-mentioned armature chamber (41).
6. pump as claimed in claim 5 is characterized in that,
When the movement direction of above-mentioned armature (33) is observed, above-mentioned current return circuit (313) is configured in the projection plane of above-mentioned armature (33).
7. pump as claimed in claim 5 is characterized in that,
Above-mentioned importing path (312) and above-mentioned current return circuit (313) are configured to, and stagger mutually in the position on the Zhou Fangxiang of above-mentioned armature (33).
8. pump as claimed in claim 6 is characterized in that,
Above-mentioned importing path (312) and above-mentioned current return circuit (313) are configured to, and stagger mutually in the position on the Zhou Fangxiang of above-mentioned armature (33).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP040072/2008 | 2008-02-21 | ||
| JP2008040072A JP4483954B2 (en) | 2008-02-21 | 2008-02-21 | pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101514695A CN101514695A (en) | 2009-08-26 |
| CN101514695B true CN101514695B (en) | 2012-06-13 |
Family
ID=41039280
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101779949A Expired - Fee Related CN101514695B (en) | 2008-02-21 | 2008-11-26 | Pump |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4483954B2 (en) |
| CN (1) | CN101514695B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10711754B2 (en) * | 2017-12-06 | 2020-07-14 | Caterpillar Inc. | Valve assembly having electrical actuator with stepped armature |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1714236A (en) * | 2003-01-09 | 2005-12-28 | 株式会社博世汽车系统 | Fuel supply pump |
| CN2804416Y (en) * | 2005-04-26 | 2006-08-09 | 无锡油泵油嘴研究所 | Feed pump of co-rail oil injection system |
| JP2007100590A (en) * | 2005-10-04 | 2007-04-19 | Denso Corp | Fuel supply device |
-
2008
- 2008-02-21 JP JP2008040072A patent/JP4483954B2/en active Active
- 2008-11-26 CN CN2008101779949A patent/CN101514695B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1714236A (en) * | 2003-01-09 | 2005-12-28 | 株式会社博世汽车系统 | Fuel supply pump |
| CN2804416Y (en) * | 2005-04-26 | 2006-08-09 | 无锡油泵油嘴研究所 | Feed pump of co-rail oil injection system |
| JP2007100590A (en) * | 2005-10-04 | 2007-04-19 | Denso Corp | Fuel supply device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4483954B2 (en) | 2010-06-16 |
| CN101514695A (en) | 2009-08-26 |
| JP2009197674A (en) | 2009-09-03 |
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