CN109838326B - Improved fuel injection pump for preventing diesel oil of diesel engine from blackening - Google Patents
Improved fuel injection pump for preventing diesel oil of diesel engine from blackening Download PDFInfo
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- CN109838326B CN109838326B CN201811605096.9A CN201811605096A CN109838326B CN 109838326 B CN109838326 B CN 109838326B CN 201811605096 A CN201811605096 A CN 201811605096A CN 109838326 B CN109838326 B CN 109838326B
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- 239000002283 diesel fuel Substances 0.000 title claims abstract description 44
- 238000002347 injection Methods 0.000 title claims abstract description 25
- 239000007924 injection Substances 0.000 title claims abstract description 25
- 239000000446 fuel Substances 0.000 title claims abstract description 22
- 239000003921 oil Substances 0.000 claims abstract description 124
- 239000010705 motor oil Substances 0.000 claims abstract description 97
- 238000000034 method Methods 0.000 claims abstract description 4
- 238000005461 lubrication Methods 0.000 claims description 32
- 238000009434 installation Methods 0.000 claims description 27
- 238000005096 rolling process Methods 0.000 claims description 3
- 239000000314 lubricant Substances 0.000 claims 2
- 239000010687 lubricating oil Substances 0.000 abstract description 7
- 230000001050 lubricating effect Effects 0.000 abstract description 4
- 238000007789 sealing Methods 0.000 description 3
- 239000000178 monomer Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
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- Fuel-Injection Apparatus (AREA)
Abstract
The invention discloses an improved structure fuel injection pump for preventing diesel oil of a diesel engine from blackening, which comprises a high-pressure oil pump body connected with an engine; the plurality of sleeves are arranged in parallel in an electric control unit pump body of the high-pressure oil pump, and an electromagnetic valve component and a control valve component are arranged in the electric control unit pump; the single-hole engine oil throttling oil inlet screw and the single-hole engine oil inlet pump body are adopted to limit the engine oil inlet amount, an engine oil flow groove is arranged in the pump body to increase the flow lubricity of engine oil among cylinders of the fuel injection pump, and the engine oil drain hole and the bearing cover part for enlarging the oil return hole in the pump body accelerate a plurality of engine oils in the fuel injection pump to flow out of the diesel engine, so that the engine oil level of the fuel injection pump is effectively reduced, and the engine oil is prevented from flowing into a single combined pump diesel cavity; the plunger cavity is provided with a plunger lubricating oil storage cavity and an oil return hole, and the plunger lubricating oil storage cavity can also effectively play a role in lubricating the plunger in the process of preventing engine oil from entering the diesel cavity through the oil return hole, so that the engine oil is prevented from entering the diesel cavity, and the diesel blackening fault of a diesel vehicle can be effectively avoided.
Description
Technical Field
The invention relates to the technical field of high-pressure oil pumps of diesel engines, in particular to an improved structure oil injection pump for preventing diesel oil of a diesel engine from blackening, which is applied to a fuel injection system.
Background
The existing electric control monomer combined pump is lubricated in a forced lubrication mode, the engine oil pressure is determined by an engine oil pump, the engine oil pressure is generally relatively high, excessive engine oil enters an oil injection pump, and the engine oil is gradually blackened after the engine oil is usually operated for 50 hours in a diesel engine. If the electronic control unit combination pump does not perform control for reducing the oil inlet amount of the engine oil and limiting the engine oil from being connected into the diesel oil, the engine oil is led to be connected into the diesel oil cavity from the engine oil cavity of the electronic control unit combination pump, so that the diesel oil blackening fault in the market is frequent.
Disclosure of Invention
The invention aims to solve the technical problem that diesel oil is blackened due to the fact that engine oil in an existing diesel engine is connected into a diesel oil cavity from an engine oil cavity in a single combined pump in series, and provides an oil injection pump for preventing diesel oil of a diesel vehicle from being blackened.
The technical problems to be solved by the invention can be realized by the following technical scheme:
An improved fuel injection pump for preventing diesel oil from blackening of a diesel engine, comprising:
The high-pressure oil pump body is provided with an engine oil flowing cavity at the bottom in the high-pressure oil pump body, a plurality of electric control unit pump installation cavities are arranged at the middle upper part in the high-pressure oil pump body in parallel, a diesel oil cavity is arranged at the upper part of each electric control unit pump installation cavity, an engine oil lubrication cavity is arranged at the lower part, the bottom of the engine oil lubrication cavity is communicated with the engine oil flowing cavity, the diesel oil cavities on adjacent electric control unit pump installation cavities are communicated through first oil passage holes arranged on the cavity walls between the adjacent electric control unit pump installation cavities, and the engine oil lubrication cavities on the adjacent electric control unit pump installation cavities are communicated through second oil passage holes arranged on the cavity walls between the adjacent electric control unit pump installation cavities; a bearing cover part is arranged at one end of the engine oil flowing cavity, and a plurality of engine oil return holes are arranged on the bearing cover part;
the diesel oil is communicated with a diesel oil cavity in the electric control unit pump mounting cavity adjacent to the total oil inlet through the oil inlet connector and the total oil inlet arranged on the high-pressure oil pump body;
A plurality of electric control unit pumps which are arranged in parallel in the corresponding electric control unit installation cavities; the outer circumferential surface of the pump body of each electric control unit pump is provided with a low-pressure cavity, and the low-pressure cavity on the outer circumferential surface of the pump body of each electric control unit pump is communicated with the corresponding diesel oil cavity; the low-pressure cavity in each electric control unit pump is communicated with the high-pressure oil cavity in the electric control unit pump body through an oil inlet channel in the electric control unit pump body; the rolling wheel body assembly in each electric control unit pump body extends into the corresponding engine oil lubrication cavity and is driven by a cam shaft arranged in the engine oil flow cavity; it is characterized in that the method comprises the steps of,
Only one small-aperture engine oil inlet hole communicated with an engine oil lubrication cavity in an electric control unit pump installation cavity is formed in the high-pressure oil pump body, an engine oil throttling oil inlet screw is installed in the engine oil inlet hole, and the engine oil throttling oil inlet screw is communicated with the engine oil return hole through an engine oil pipe.
In a preferred embodiment of the present invention, an oil throttle hole is provided in the oil throttle inlet screw to control an oil inlet amount of the oil.
In a preferred embodiment of the present invention, a plurality of oil flow grooves are provided in the oil flow chamber.
In a preferred embodiment of the present invention, oil drain holes are provided in the end of the high-pressure oil pump body adjacent to the bearing cap member, each oil drain hole being in communication with two oil drain holes in the bearing cap member, the oil drain holes being enlarged oil drain holes.
In a preferred embodiment of the invention, a plunger lubricating oil storage cavity is arranged on the cavity wall of the plunger cavity in each electric control unit pump, and an oil return hole is arranged in the pump body of each electric control unit pump, and the plunger lubricating oil storage cavity is communicated with the low-pressure cavity through the oil return hole.
In a preferred embodiment of the invention, a sealing ring is arranged on the outer circumference of each electric control unit pump body to seal and isolate the diesel cavity in each electric control unit pump installation cavity from the engine oil lubrication cavity.
Due to the adoption of the technical scheme, compared with the existing fuel injection pump, the fuel injection pump has the following advantages:
1. only one small-aperture engine oil inlet hole and one engine oil throttling oil inlet screw are adopted to spray engine oil into an engine oil lubrication cavity in an electric control unit pump installation cavity, so that the oil quantity of the engine oil entering the high-pressure oil pump body is reduced, the engine oil pressure in the high-pressure oil pump body is effectively reduced, and the engine oil is prevented from being upwards strung into a diesel oil cavity.
2. The engine oil flow grooves are formed in the engine oil flow cavities, so that the mobility of engine oil among the engine oil lubrication cavities is improved, and the engine oil can be timely sent into the engine oil lubrication cavities.
3. By arranging the enlarged oil return hole on the bearing cover part and arranging the oil drain hole at one end of the high-pressure oil pump body adjacent to the bearing cover part, the oil return speed is improved, the oil level of the oil lubrication cavity in each electric control unit pump installation cavity is reduced, and the upward strings of the oil into the diesel cavity are further prevented.
4. The plunger lubricating oil storage cavity on the plunger is canceled, the plunger lubricating oil storage cavity is arranged on the cavity wall of the plunger cavity, the upward movement of the plunger in the electric control unit pump is prevented from being caused to run into the diesel cavity by the upward movement of the engine oil in the engine lubricating cavity, and meanwhile, the plunger lubricating oil storage cavity can also effectively lubricate the plunger, so that the diesel is prevented from being blacked.
5. The sealing ring is arranged on the outer circumference of each electric control unit pump body, the diesel cavity in each electric control unit pump installation cavity is sealed and isolated from the engine oil lubrication cavity, and engine oil in the engine oil lubrication cavity can be effectively isolated from being mixed with diesel oil in the diesel cavity, so that the diesel oil is prevented from becoming black.
The invention can effectively control the problem that engine oil is strung into the diesel oil cavity from the engine oil lubrication cavity in the electric control monomer combination pump, and prevent the diesel oil from blackening.
Drawings
Fig. 1 is a front view of an improved fuel injection pump for preventing diesel oil from blackening in a diesel engine according to the present invention.
Fig. 2 is a schematic diagram of a central section of an improved structure of an injection pump for preventing diesel oil from blackening.
Fig. 3 is a right side view of fig. 1.
Fig. 4 is a schematic cross-sectional view of the oil intake surface of the improved fuel injection pump for preventing diesel oil from blackening.
Fig. 5 is an enlarged schematic view at I of fig. 2.
Detailed Description
The invention is further described with reference to the following detailed drawings in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the implementation of the invention easy to understand.
Referring to fig. 1 to 5, an improved fuel injection pump for preventing diesel oil from blackening of a diesel engine is provided, which comprises a high-pressure oil pump body 100, wherein a bottom in the high-pressure oil pump body 100 is provided with an engine oil flowing cavity 130, a middle upper part in the high-pressure oil pump body 100 is provided with a plurality of electric control unit pump mounting cavities in parallel, the upper part of each electric control unit pump mounting cavity is provided with a diesel oil cavity 110, and the lower part is provided with an engine oil lubricating cavity 120. The bottom oil flow chamber 130 of each oil lubrication chamber 120 communicates.
The diesel cavity 110 in the adjacent electric control unit pump installation cavity is communicated through the oil passage hole a arranged on the cavity wall between the adjacent electric control unit pump installation cavities, so that the diesel pressure between each cylinder is kept constant, the fuel injection dispersion difference is reduced, and the power uniformity of the diesel engine is ensured.
The engine oil lubrication cavities 120 on the adjacent electric control unit pump installation cavities are communicated through the oil passage holes b arranged on the cavity walls between the adjacent electric control unit pump installation cavities, so that the engine oil flow lubrication among the cylinders is kept constant, and the service life of the unit combination pump is prolonged.
A bearing cap member 400 is provided at one end of the oil flow chamber 130, and four enlarged oil return holes h are provided in the bearing cap member 400.
The oil inlet connector 140 on the high-pressure oil pump body 100, and the diesel oil is communicated with the diesel oil cavity 110 in the electric control unit pump mounting cavity adjacent to the total oil inlet 150 through the oil inlet connector 140 and the total oil inlet 150 arranged on the high-pressure oil pump body 100.
A plurality of electric control unit pumps 200 are installed in parallel in the paired electric control unit installation cavities through studs 210 and fastening nuts 220. An electromagnet part 230 and a control valve part 240 are installed in the electric control unit pump 200; the electromagnet part 230 is electrified through the ECU control unit to attract the control valve part 240 to close and establish high-pressure fuel, and the electromagnet part 230 is electrified through the ECU control unit to open the control valve part 240, so that the high-pressure fuel is discharged back into the low-pressure oil path.
A low pressure cavity 281 is arranged on the outer circumferential surface of the pump body 280 of each electric control unit pump 200, and the low pressure cavity 281 on the outer circumferential surface of the pump body 280 of each electric control unit pump 200 is communicated with the corresponding diesel oil cavity 110; the low-pressure cavity 281 in each electric control unit pump 200 is communicated with the high-pressure oil cavity k in the pump body 280 of the electric control unit pump 200 through an oil inlet channel j in the pump body 210 of the electric control unit pump 200; the rolling wheel body assembly 290 in the pump body 280 of each of the electronically controlled unit pumps 200 extends into the corresponding oil lubrication chamber 120 and is driven by a camshaft disposed within the oil flow chamber 130.
The invention is characterized in that the high-pressure oil pump body 100 is provided with only a small-aperture engine oil inlet hole d communicated with an engine oil lubrication cavity 120 in an electric control unit pump installation cavity, an engine oil throttling and oil inlet screw 300 is arranged in the engine oil inlet hole d, and the engine oil throttling and oil inlet screw 300 is communicated with an engine oil return hole h through an engine oil pipe. An oil throttle hole 310 is provided in the oil throttle inlet screw 300 to control the oil inlet amount of the oil.
In order to increase the fluidity of the oil between the respective oil lubrication chambers 120, it is ensured that the oil can be timely fed into the respective oil lubrication chambers 120, and a plurality of oil flow grooves e are provided in the oil flow chamber 130.
In order to increase the oil return speed, the oil level of the oil lubrication cavity 120 in each electric control unit pump installation cavity is reduced, the engine oil is further prevented from being upwards strung into the diesel cavity 110, an oil drain hole f is formed in the end, adjacent to the bearing cover part 400, of the high-pressure oil pump body 100, each oil drain hole f is communicated with two oil return holes h in the bearing cover part, and therefore excessive engine oil in the oil lubrication cavity 120 of the oil injection pump is effectively prevented, and the engine oil is prevented from being upwards strung into the diesel cavity 110.
In order to prevent the plunger 260 in the electric control unit pump 200 from being in upward movement, the engine oil in the engine oil lubrication cavity 120 is strung into the diesel oil cavity 110, and meanwhile, the function of lubricating the plunger 260 can be effectively achieved, so that the diesel oil is prevented from being blackened.
According to the invention, each cylinder unit pump is provided with the engine oil and diesel oil isolation sealing ring i, so that engine oil in the engine oil lubrication cavity 120 and diesel oil in the diesel oil cavity 110 can be effectively isolated. The plunger is a straight rod plunger, and the plunger cavity 270 is provided with a plunger lubrication oil storage cavity g and an oil return hole c, so that the plunger can be lubricated effectively in the process of preventing engine oil from entering the diesel cavity 110 through the oil return hole c, and the engine oil is prevented from being upwards mixed with the single combined pump diesel cavity.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above-described embodiments, and that the above-described embodiments and the description are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. An improved fuel injection pump for preventing diesel oil from blackening of a diesel engine, comprising:
The high-pressure oil pump body is provided with an engine oil flowing cavity at the bottom in the high-pressure oil pump body, a plurality of electric control unit pump installation cavities are arranged at the middle upper part in the high-pressure oil pump body in parallel, a diesel oil cavity is arranged at the upper part of each electric control unit pump installation cavity, an engine oil lubrication cavity is arranged at the lower part, the bottom of the engine oil lubrication cavity is communicated with the engine oil flowing cavity, the diesel oil cavities on adjacent electric control unit pump installation cavities are communicated through first oil passage holes arranged on the cavity walls between the adjacent electric control unit pump installation cavities, and the engine oil lubrication cavities on the adjacent electric control unit pump installation cavities are communicated through second oil passage holes arranged on the cavity walls between the adjacent electric control unit pump installation cavities; a bearing cover part is arranged at one end of the engine oil flowing cavity, and a plurality of engine oil return holes are arranged on the bearing cover part;
the diesel oil is communicated with a diesel oil cavity in the electric control unit pump mounting cavity adjacent to the total oil inlet through the oil inlet connector and the total oil inlet arranged on the high-pressure oil pump body;
A plurality of electric control unit pumps which are arranged in parallel in the corresponding electric control unit installation cavities; the outer circumferential surface of the pump body of each electric control unit pump is provided with a low-pressure cavity, and the low-pressure cavity on the outer circumferential surface of the pump body of each electric control unit pump is communicated with the corresponding diesel oil cavity; the low-pressure cavity in each electric control unit pump is communicated with the high-pressure oil cavity in the electric control unit pump body through an oil inlet channel in the electric control unit pump body; the rolling wheel body assembly in each electric control unit pump body extends into the corresponding engine oil lubrication cavity and is driven by a cam shaft arranged in the engine oil flow cavity; it is characterized in that the method comprises the steps of,
Only one small-aperture engine oil inlet hole communicated with an engine oil lubrication cavity in an electric control unit pump installation cavity is formed in the high-pressure oil pump body, an engine oil throttling oil inlet screw is installed in the engine oil inlet hole, and the engine oil throttling oil inlet screw is communicated with the engine oil return hole through an engine oil pipe.
2. An improved fuel injection pump for preventing blackening of diesel fuel in a diesel engine as claimed in claim 1, wherein an oil orifice is provided in said oil throttle feed screw.
3. An improved fuel injection pump for preventing blackening of diesel fuel of a diesel engine as claimed in claim 2, characterized in that a plurality of oil flow grooves are provided in said oil flow chamber.
4. An improved fuel injection pump for preventing blackening of diesel fuel in a diesel engine as claimed in claim 3, wherein said high-pressure oil pump body is provided with oil drain holes at an end adjacent to said bearing cap member, each oil drain hole communicating with two oil drain holes on said bearing cap member, said oil drain holes being enlarged oil drain holes.
5. An improved fuel injection pump for preventing blackening of diesel oil of a diesel engine as claimed in claim 4, wherein a plunger lubricant oil storage chamber is provided on a wall of a plunger chamber in each of the electronically controlled unit pumps and an oil return hole is provided in a body of each of the electronically controlled unit pumps, the plunger lubricant oil storage chamber being communicated with the low pressure chamber through the oil return hole.
6. An improved fuel injection pump for preventing blackening of diesel engine as in claim 5, wherein a seal ring is provided on the outer periphery of each electronically controlled unit pump body to seal the diesel cavity in each electronically controlled unit pump mounting cavity from the engine oil lubrication cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811605096.9A CN109838326B (en) | 2018-12-26 | 2018-12-26 | Improved fuel injection pump for preventing diesel oil of diesel engine from blackening |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811605096.9A CN109838326B (en) | 2018-12-26 | 2018-12-26 | Improved fuel injection pump for preventing diesel oil of diesel engine from blackening |
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| Publication Number | Publication Date |
|---|---|
| CN109838326A CN109838326A (en) | 2019-06-04 |
| CN109838326B true CN109838326B (en) | 2024-05-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811605096.9A Active CN109838326B (en) | 2018-12-26 | 2018-12-26 | Improved fuel injection pump for preventing diesel oil of diesel engine from blackening |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112761841A (en) * | 2020-12-23 | 2021-05-07 | 南岳电控（衡阳）工业技术股份有限公司 | Fuel injection pump for preventing difficult starting of diesel engine |
| CN114483401A (en) * | 2022-01-30 | 2022-05-13 | 南岳电控（衡阳）工业技术股份有限公司 | Oil duct structure for preventing fuel oil and engine oil from channeling each other for combined fuel injection pump |
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| CN108425776A (en) * | 2017-12-29 | 2018-08-21 | 南岳电控（衡阳）工业技术股份有限公司 | A kind of co-rail fuel feed pump of oil inlet control |
| CN210087520U (en) * | 2018-12-26 | 2020-02-18 | 南岳电控（衡阳）工业技术股份有限公司 | Improved structure fuel injection pump for preventing diesel oil of diesel engine from blackening |
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2018
- 2018-12-26 CN CN201811605096.9A patent/CN109838326B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202001162U (en) * | 2010-12-07 | 2011-10-05 | 中国第一汽车集团公司无锡油泵油嘴研究所 | Oil-taking metering valve controlled common-rail oil feed pump |
| CN202510265U (en) * | 2012-03-29 | 2012-10-31 | 江西直方数控动力有限公司 | Direct synthesis injection pump of mine electrical unit |
| CN103883451A (en) * | 2014-04-02 | 2014-06-25 | 广西玉柴机器股份有限公司 | Method for reducing liquid level height of electronic unit pump inner cavity engine oil |
| CN106523228A (en) * | 2016-12-31 | 2017-03-22 | 南岳电控（衡阳）工业技术股份有限公司 | Fuel-injection electronic unit pump for low-power diesel generator |
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| CN109838326A (en) | 2019-06-04 |
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