CN105697205B - A kind of array distribution formula electrical control oil spray pump high pressure fuel distributor - Google Patents
A kind of array distribution formula electrical control oil spray pump high pressure fuel distributor Download PDFInfo
- Publication number
- CN105697205B CN105697205B CN201610060818.1A CN201610060818A CN105697205B CN 105697205 B CN105697205 B CN 105697205B CN 201610060818 A CN201610060818 A CN 201610060818A CN 105697205 B CN105697205 B CN 105697205B
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- Prior art keywords
- oil
- distribution
- duct
- communicated
- pressure
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- 238000009826 distribution Methods 0.000 title claims abstract description 71
- 239000000446 fuel Substances 0.000 title claims abstract description 37
- 239000007921 spray Substances 0.000 title abstract 2
- 239000003921 oil Substances 0.000 claims abstract description 153
- 239000000295 fuel oil Substances 0.000 claims abstract description 31
- 238000002347 injection Methods 0.000 claims description 15
- 239000007924 injection Substances 0.000 claims description 15
- 238000007789 sealing Methods 0.000 claims description 4
- 238000002485 combustion reaction Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M41/00—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor
- F02M41/08—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M41/00—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor
- F02M41/02—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor being spaced from pumping elements
- F02M41/06—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor being spaced from pumping elements the distributor rotating
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The invention discloses a kind of in-line distribution formula electrical control oil spray pump high pressure fuel distributors, including distribution set and the distributing shaft being nested in distribution set, the top of distribution set offers the first oilhole, the top of distributing shaft offers the ring shaped oil passage being connected with the first oilhole, first to communicate with each other is offered in the middle part of distributing shaft and intersects oil duct and the second intersection oil duct, first intersection oil duct is connected with ring shaped oil passage, the lower part of distribution set is also uniformly distributed, and there are four the second oilholes, when distributing shaft rotates, the second intersection oil duct is communicated or is disconnected with four the second oilholes successively.The high pressure fuel in electric control pump is sequentially allocated to delivery valve using the present invention, evenly distributing for fuel oil is realized, changes the combustibility of engine, extend the service life of each component in electric control pump.
Description
Technical Field
The invention belongs to the technical field of automobile parts, and particularly relates to a high-pressure fuel oil distribution device for an in-line distribution type electronic control fuel injection pump.
Background
Along with the implementation of national regulation on the three-stage non-road diesel engine automobile exhaust emission, NO in the diesel engine exhaust emission is regulatedxThe requirements for HC and CO are increasing, and in order to meet the requirements for diesel engine emissions and combustion, the start point and quantity of fuel injected by the fuel injection pump must be precisely controlled. At present, an oil supply system of a domestic diesel engine generally adopts an arrangement type oil injection pump, the oil injection pump consists of a plurality of plunger and barrel assemblies, and each plunger and barrel assembly corresponds to one cylinder. In the process that high-pressure fuel enters the fuel chamber from the plunger matching part, the fuel is pressed, and the rapidly expanded fuel abrasive particles abrade the plunger matching part, so that the contact point of the fuel inlet hole causes fuel leakage, the fuel supply pressure is reduced, the frequency is unstable, the uniformity of the fuel supply of each cylinder is poor, the oil pressure is inconsistent, the work of each cylinder is unequal, the fuel consumption is increased, and the diesel is damagedThe axle and the axle bush of oil machine. Due to poor combustion performance, carbon deposit is increased, temperature rise is caused, serious abrasion of a cylinder sleeve, a piston ring and the like is caused, the service life of a plunger and barrel assembly is shortened, and the time and labor are wasted because a high-pressure oil pump detection platform is required to be used for testing one by one after a new plunger and barrel assembly is replaced.
Patent ZL91227859.5 discloses a short-stroke high oil pressure distribution type injection pump, and it comprises shell, camshaft, fuel distributor shell, fuel distributor, distribution gear and plunger pair, and the camshaft is connected with distribution gear and fuel distributor, and camshaft drive plunger pair improves the oil pressure and drives the distributor rotation, supplies oil to each jar through the oil-out, has into oil pipe in the plunger pair, its high pressure fuel pipe links to each other with the oil inlet of distributor shell, fuel distributor on constitute the oil circuit by oil feed circular slot, inlet port, oil storage chamber, oil outlet, have oil-out and surplus fuel return circuit on the fuel distributor shell, can have four or six oil-outs on the fuel distributor shell, spout the fuel respectively to four or six jars. Although the fuel injection pump can realize the distribution of fuel, the fuel injection pump is only suitable for short-stroke engines, and the fact that the consistency of oil pressure of oil outlets of the fuel injection pump is poor, the fuel distribution rate is low, and the pressure of a pump end is low is found in the practical use process.
It will thus be seen that the prior art is susceptible to further improvements and enhancements.
Disclosure of Invention
The invention provides a high-pressure fuel oil distribution device for an in-line distribution type electronic control fuel injection pump, aiming at avoiding the defects in the prior art.
The technical scheme adopted by the invention is as follows:
the high-pressure fuel oil distribution device for the in-line distribution type electronic control fuel injection pump comprises a distribution sleeve and a distribution shaft sleeved in the distribution sleeve, wherein a first oil hole is formed in the upper portion of the distribution sleeve, an annular oil duct communicated with the first oil hole is formed in the upper portion of the distribution shaft, a first cross oil duct and a second cross oil duct which are communicated with each other are formed in the middle of the distribution shaft, the first cross oil duct is communicated with the annular oil duct, four second oil holes are uniformly distributed in the lower portion of the distribution sleeve, and when the distribution shaft rotates, the second cross oil duct is communicated with or disconnected from the four second oil holes in sequence.
The lower part of the distribution shaft is provided with a leakage-proof annular groove, the lower part of the distribution sleeve is provided with an oil return duct communicated with the leakage-proof annular groove, and the leakage-proof annular groove and the oil return duct are both positioned below the second oil hole.
And the periphery of the middle part of the distribution sleeve is provided with a low-pressure annular oil groove.
And the upper end of the distribution shaft is provided with a sealing plug.
The first oil hole is communicated with a high-pressure fuel oil channel on the in-line distribution type electric control pump, the second oil hole is communicated with an oil outlet valve on the in-line distribution type electric control pump, and four oil outlets in one-to-one correspondence to the second oil holes are arranged on the oil outlet valve.
Due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. after one plunger in the in-line distribution type electric control pump pressurizes fuel, the high-pressure fuel is sequentially distributed to the oil outlet valve through the distribution device, the purpose that one plunger can supply oil to the four-cylinder engine is achieved, the original structural form that four plungers are needed when the four-cylinder engine is supplied with power is changed, and the oil supply mode of a traditional oil injection pump is changed.
2. The invention can realize the uniform distribution of fuel oil, the consistency of the oil pressure of the fuel oil sprayed from each oil outlet of the oil outlet valve is high, the pressure of the pump end is high, the combustion performance of the engine is changed, and the service life of each part in the electric control pump is prolonged.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a sectional view taken along line a-a of fig. 1.
Fig. 3 is a partial structural view of an electrically controlled pump after the present invention is applied thereto.
Wherein,
1. the oil distribution pump comprises a distribution sleeve 2, a distribution shaft 3, a first oil hole 4, an annular oil duct 5, a first cross oil duct 6, a low-pressure annular groove 7, a second cross oil duct 8, a second oil hole 9, a leakage-proof annular groove 10, an oil return oil duct 11, a sealing plug 12, a pump head 13, a low-pressure fuel inlet 14, a low-pressure oil duct 15, a low-pressure oil hole 16, a plunger 17, a high-pressure oil chamber 18, a first high-pressure oil duct 19, an oil quantity control valve 20, a second high-pressure oil duct 21, an oil outlet valve 22
Detailed Description
The present invention will be described in further detail with reference to the following drawings and specific examples, but the present invention is not limited to these examples.
As shown in fig. 1 to 3, a high-pressure fuel oil distributing device for an in-line distributing type electric control fuel injection pump comprises a pump head 12, the high-pressure fuel oil distributing device is arranged on the pump head 12, a plunger 16, an oil outlet valve 21, an electromagnetic valve 22 and an oil quantity control valve 19 are further arranged on the pump head 12, a cam shaft is arranged below the plunger 16, the cam shaft is arranged on a pump body of the in-line distributing type electric control pump, the high-pressure fuel oil distributing device comprises a distributing sleeve 1 and a distributing shaft 2 sleeved in the distributing sleeve 1, a press-fit mounting mode is adopted between the distributing shaft 2 and the distributing sleeve 1, the rear end of the cam shaft drives the distributing shaft 2 to rotate in the distributing sleeve 1 through a gear transmission assembly, a high-pressure oil chamber 17 is arranged on the upper portion of the plunger 16, a sealing plug 11 is arranged on the upper end of the distributing shaft 2, a first oil hole 3 is arranged on the upper portion of the distributing sleeve 1, an annular oil passage 4, the middle part of the distribution shaft 2 is provided with a first cross oil duct 5 and a second cross oil duct 7 which are communicated with each other, the first cross oil duct 5 is communicated with the annular oil duct 4, the lower part of the distribution shaft 1 is uniformly provided with four second oil holes 8, when the distribution shaft 2 rotates, the second cross oil duct 7 is sequentially communicated with or disconnected from the four second oil holes 8, the second oil holes 8 are communicated with an oil outlet valve 21, and the oil outlet valve 21 is provided with four oil outlets which are in one-to-one correspondence with the second oil holes 8; the pump head 12 is provided with a first high-pressure oil duct 18 respectively communicated with the high-pressure oil chamber 17 and the first oil hole 3, the pump head 12 is further provided with a second high-pressure oil duct 20 for communicating the high-pressure oil chamber 17 with the oil amount control valve 19, the pump head 12 is further provided with a low-pressure fuel inlet 13, a low-pressure oil duct 14 and a low-pressure oil hole 15 which are communicated with each other, and the periphery of the middle part of the distribution sleeve 1 is provided with a low-pressure annular oil groove 6.
When the in-line distribution type electric control pump works, low-pressure fuel oil enters a low-pressure oil duct 14 from a low-pressure fuel oil inlet 13, flows through a low-pressure annular groove 6 at the lower end of the distribution sleeve 1 and then is filled in the low-pressure oil duct 14, the low-pressure fuel oil is filled in the low-pressure oil duct 14 and then is filled in a high-pressure oil chamber 17 at the upper part of a plunger 16 through an oil quantity control valve 19, the plunger 16 starts to move upwards under the driving of a cam shaft to compress the fuel oil at the upper part of the plunger, and after the fuel oil is pressurized, one end of the pressurized fuel oil flows to the; at this time, the electromagnetic valve 22 is electrified to work, the oil quantity control valve 19 is sucked, the oil passage which flows back to the oil quantity control valve 19 through the second high-pressure oil passage 20 is cut off, and the high-pressure fuel oil is forced to flow to the distribution sleeve 1 only through the first high-pressure oil passage 18; the high-pressure fuel oil flowing to the distributing sleeve 1 enters the annular oil passage 4 at the upper end of the distributing shaft 1 through the first oil hole 3 and then flows through the first cross oil passage 5 to reach the second cross oil passage 7, at the moment, the distributing shaft 2 is driven by the camshaft to rotate, the second cross oil passage 7 is just communicated with one of the four second oil holes 8 at the lower part of the distributing sleeve 1, the high-pressure fuel oil enters the oil outlet valve 21 through the second oil holes 8 to start injecting the high-pressure fuel oil into an engine cylinder, and the engine starts to operate.
When the plunger 16 moves downwards under the driving of the camshaft, the electromagnetic valve 22 is powered off, the oil quantity control valve 19 is bounced open, the second high-pressure oil passage 20 is connected, the low-pressure fuel oil in the low-pressure oil passage 14 starts to flow to the high-pressure oil cavity 17 on the plunger 16, and the high-pressure oil cavity 17 is filled with the low-pressure fuel oil to prepare for the upward compression of the fuel oil by the plunger 16; when the plunger 16 moves downwards, the distribution shaft 2 still rotates under the driving of the camshaft, but in the process, the second cross oil passage 7 on the distribution shaft 2 is not communicated with any of the second oil holes 8 on the distribution sleeve 1, and the oil outlet valve 21 does not discharge oil.
The lower part of the distribution shaft 2 is provided with a leakage-proof annular groove 9, the lower part of the distribution sleeve 2 is provided with an oil return duct 10 communicated with the leakage-proof annular groove 9, the leakage-proof annular groove 9 and the oil return duct 10 are both positioned below the second oil hole 8, the oil return duct 10 is communicated with the low-pressure oil hole 15, because a gap exists between the distribution shaft 2 and the distribution sleeve 1, high-pressure fuel oil leaks downwards from the gap, and the leaked fuel oil enters the low-pressure oil hole 15 at the lower end of the pump head 12 through the oil return duct 10 on the distribution sleeve 1 and flows back to the low-pressure oil duct 14 for recycling after reaching the leakage-proof annular groove 9 at the lower.
The cam shaft can adopt a square cam shaft, namely a cam is arranged on the cam shaft, four bulges are uniformly distributed on the cam, only one plunger is arranged, the cam rotates for a circle, the plunger 16 reciprocates up and down for four times to drive the plunger 16 to compress high-pressure fuel oil for four times, the electromagnetic valve 22 is also electrified for four times, the oil quantity control valve is attracted for 19 times, the high-pressure fuel oil is supplied to the distribution shaft 2 for four times through the first high-pressure oil duct 18, and an oil outlet of the oil outlet valve 21 flows to an air cylinder of the engine at each time, so that the mode that the plunger 16 distributes the high-pressure fuel oil to supply the oil to the four-cylinder engine through the distribution shaft 2 is realized, and the mode that the traditional oil injection pump supplies.
Parts which are not described in the invention can be realized by adopting or referring to the prior art.
Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (1)
1. The high-pressure fuel oil distribution device for the in-line distribution type electric control fuel injection pump is characterized by comprising a distribution sleeve and a distribution shaft sleeved in the distribution sleeve, wherein the upper part of the distribution sleeve is provided with a first oil hole, the upper part of the distribution shaft is provided with an annular oil duct communicated with the first oil hole, the middle part of the distribution shaft is provided with a first cross oil duct and a second cross oil duct which are communicated with each other, the first cross oil duct is communicated with the annular oil duct, the lower part of the distribution sleeve is also uniformly provided with four second oil holes, and when the distribution shaft rotates, the second cross oil duct is sequentially communicated with or disconnected with the four second oil holes;
the lower part of the distribution shaft is provided with a leakage-proof annular groove, the lower part of the distribution sleeve is provided with an oil return duct communicated with the leakage-proof annular groove, and the leakage-proof annular groove and the oil return duct are both positioned below the second oil hole;
a low-pressure annular oil groove is formed in the periphery of the middle part of the distribution sleeve;
the upper end of the distribution shaft is provided with a sealing plug;
the first oil hole is communicated with a high-pressure fuel oil channel on the in-line distribution type electric control pump, the second oil hole is communicated with an oil outlet valve on the in-line distribution type electric control pump, and four oil outlets in one-to-one correspondence to the second oil holes are arranged on the oil outlet valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610060818.1A CN105697205B (en) | 2016-01-28 | 2016-01-28 | A kind of array distribution formula electrical control oil spray pump high pressure fuel distributor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610060818.1A CN105697205B (en) | 2016-01-28 | 2016-01-28 | A kind of array distribution formula electrical control oil spray pump high pressure fuel distributor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105697205A CN105697205A (en) | 2016-06-22 |
| CN105697205B true CN105697205B (en) | 2018-06-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610060818.1A Active CN105697205B (en) | 2016-01-28 | 2016-01-28 | A kind of array distribution formula electrical control oil spray pump high pressure fuel distributor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105697205B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110671249B (en) * | 2019-09-25 | 2023-07-07 | 南京威孚金宁有限公司 | Distribution pump plunger with oil outlet valve and working method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4574759A (en) * | 1981-06-23 | 1986-03-11 | Robert Bosch Gmbh | Fuel injection pump |
| CN1222952A (en) * | 1997-04-04 | 1999-07-14 | 罗伯特·博施有限公司 | Fuel injection pump for internal combustion engine |
| CN1455845A (en) * | 2000-11-09 | 2003-11-12 | 洋马株式会社 | Accumulator distribution type fuel injection pump |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001115921A (en) * | 1999-10-14 | 2001-04-27 | Yanmar Diesel Engine Co Ltd | Distribution type fuel injection pump |
-
2016
- 2016-01-28 CN CN201610060818.1A patent/CN105697205B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4574759A (en) * | 1981-06-23 | 1986-03-11 | Robert Bosch Gmbh | Fuel injection pump |
| CN1222952A (en) * | 1997-04-04 | 1999-07-14 | 罗伯特·博施有限公司 | Fuel injection pump for internal combustion engine |
| CN1455845A (en) * | 2000-11-09 | 2003-11-12 | 洋马株式会社 | Accumulator distribution type fuel injection pump |
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| Publication number | Publication date |
|---|---|
| CN105697205A (en) | 2016-06-22 |
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