CN113006993A - High pressure fuel pump driving structure - Google Patents
High pressure fuel pump driving structure Download PDFInfo
- Publication number
- CN113006993A CN113006993A CN202110310379.6A CN202110310379A CN113006993A CN 113006993 A CN113006993 A CN 113006993A CN 202110310379 A CN202110310379 A CN 202110310379A CN 113006993 A CN113006993 A CN 113006993A
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- Prior art keywords
- oil
- pressure fuel
- fuel pump
- hole
- oil pump
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- 239000000446 fuel Substances 0.000 title claims abstract description 58
- 230000006835 compression Effects 0.000 claims abstract description 5
- 238000007906 compression Methods 0.000 claims abstract description 5
- 239000003921 oil Substances 0.000 claims description 113
- 239000010705 motor oil Substances 0.000 claims description 15
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims 1
- 230000001050 lubricating effect Effects 0.000 abstract description 7
- 239000010687 lubricating oil Substances 0.000 description 7
- 238000002485 combustion reaction Methods 0.000 description 5
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 238000005461 lubrication Methods 0.000 description 5
- 239000010721 machine oil Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000295 fuel oil Substances 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Images
Classifications
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- 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
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
- F02M59/10—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by the piston-drive
- F02M59/102—Mechanical drive, e.g. tappets or cams
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- 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
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
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- 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
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
- F02M59/48—Assembling; Disassembling; Replacing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/08—Cooling; Heating; Preventing freezing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/18—Lubricating
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The invention relates to a high-pressure fuel pump driving structure, which comprises an oil pump mounting seat arranged on an engine cylinder body, and a compression fuel pump connected to the oil pump mounting seat in a matching manner; the oil pump mounting seat is in an L shape and is provided with a small end mounting hole and a large end mounting hole; the high-pressure fuel pump is matched and connected with the small end mounting hole, and a plunger of the high-pressure fuel pump and a high-pressure fuel pump tappet are positioned in the small end mounting hole; the large-end mounting hole is internally provided with an oil pump driving mechanism, the oil pump driving mechanism comprises an intermediate shaft, a shaft sleeve sleeved in the middle of the intermediate shaft, a chain wheel connected with one end of the intermediate shaft in a matched mode and a single cam connected with the other end of the intermediate shaft in a matched mode, the single cam is correspondingly contacted with a high-pressure oil pump tappet, and the chain wheel is exposed out of the large-end mounting hole. The invention can meet the driving and lubricating requirements of the high-pressure fuel pump below 350Bar, can adapt to the driving and lubricating requirements of the high-pressure fuel pump above 500Bar, reduces the power consumption, improves the reliability and prolongs the service life.
Description
Technical Field
The invention relates to an automobile engine, in particular to a high-pressure fuel pump driving structure.
Background
The modern internal combustion engine applied to the automobile aims to ensure better fuel economy and emission. In-cylinder direct injection combustion technology is commonly adopted, and in-cylinder direct injection, high-pressure fuel oil is generally supplied into a combustion chamber by a high-pressure fuel pump, and the fuel oil is atomized to the best suitable combustion state through precise electronic injection control and nozzle design. The pressure of a high-pressure fuel pump on a gasoline engine is generally below 350Bar at present; however, as combustion and emissions technology improves, the pressure of future high pressure fuel pumps will reach 500Bar, even up to 1000 Bar.
Referring to fig. 1, 2 and 3, the conventional high pressure fuel pump driving structure includes a high pressure fuel pump 4 provided on a cylinder head 1 and a camshaft 2; a plunger 41 is arranged in the high-pressure fuel pump 4, a cam 21 is arranged on the cam shaft 2, and a high-pressure fuel pump tappet 3 is arranged between the plunger 41 and the cam 21; a roller 31 is arranged in the high-pressure oil pump tappet 3, and a needle bearing 32 is arranged in the roller 31; the cam 21 on the camshaft 2 drives the high-pressure oil pump tappet 3, and the high-pressure oil pump tappet 3 compresses the plunger 41 inside the high-pressure oil pump 4 to pump oil and build up oil pressure. The driving mechanism is lubricated by splashing oil lubrication of a camshaft or a lubricating oil channel arranged in a mounting hole of the high-pressure oil pump tappet 3.
However, the high pressure fuel pump of 500Bar in the future, due to the pressure rise. The cam is still directly designed on the camshaft, so that the contact pressure between the cam and the high-pressure oil pump tappet is greatly improved and exceeds the allowable contact pressure limit value. Meanwhile, the needle bearing 32 is still adopted inside the high-pressure oil pump tappet 3, and then the needle bearing 32 is replaced by a sliding bearing 33 in order to prolong the service life. However, the rotational speed of the roller 31 is greatly increased due to a large increase in load, and the service life is greatly reduced, which makes it impossible to meet the use requirements of the engine. Accordingly, there is a need for a breakthrough improvement over existing high pressure fuel pump drive configurations.
CN 103266972a discloses "a driving structure of high pressure fuel pump for engine", comprising: a helical gear having an internal spline; a sleeve having an external spline; a sliding sleeve; fixing a sleeve; the sleeve is fixedly installed on a pump shaft of the high-pressure fuel pump, an external spline of the sleeve is in clearance fit with an internal spline of the helical gear so that the helical gear can slide relative to the sleeve in the axial direction, the sliding sleeve is coaxially sleeved with the fixed sleeve and can slide axially relative to the fixed sleeve, one end of the sliding sleeve is abutted against the helical gear, and a pre-compression spring is arranged between the sliding sleeve and the fixed sleeve. The helical gear type high-pressure fuel pump can effectively bear and avoid axial force generated when the high-pressure fuel pump is driven by the helical gear, so that the helical gear is more suitable for the high-pressure fuel pump, and the noise of an engine is reduced.
CN 202327599U discloses "lubricating structure of high pressure fuel pump drive shaft", including the high pressure fuel pump support, set up the drive shaft assembly shoulder hole in the high pressure fuel pump support, assemble at the support apron of high pressure fuel pump support tip, wherein, drive shaft assembly shoulder hole is including the driveshaft axis section pilot hole, drive shaft cam pilot hole, the drive shaft location axis section pilot hole of mutual intercommunication, the support apron is connected with driveshaft location axis section pilot hole, and it is still including setting up the main oil supply pipeline in the high pressure fuel pump support, all set up the lubricating oil passageway with main oil supply pipeline intercommunication on driveshaft axis section pilot hole and the drive shaft location axis section pilot hole. Compared with the existing lubricating oil way arranged on the cylinder cover, the machining difficulty of the oil way is greatly reduced, and the yield is ensured.
The technical solutions disclosed in the above patent documents are, of course, but a useful attempt in the technical field.
Disclosure of Invention
The invention aims to provide a high-pressure fuel pump driving structure which can meet the driving and lubricating requirements of a high-pressure fuel pump below 350Bar, can adapt to the driving and lubricating requirements of a high-pressure fuel pump above 500Bar, reduces power consumption, improves reliability and prolongs service life.
The invention relates to a high-pressure fuel pump driving structure, which comprises an oil pump mounting seat arranged on an engine cylinder body, and a compression ignition oil pump connected to the oil pump mounting seat in a matching manner; the method is characterized in that: the oil pump mounting seat is in an L shape and is provided with a small end mounting hole and a large end mounting hole; the high-pressure fuel pump is matched and connected with the small end mounting hole, and a plunger of the high-pressure fuel pump and a high-pressure fuel pump tappet are positioned in the small end mounting hole; the oil pump driving mechanism comprises an intermediate shaft, a shaft sleeve sleeved in the middle of the intermediate shaft, a chain wheel connected with one end of the intermediate shaft in a matched mode and a single cam connected with the other end of the intermediate shaft in a matched mode, the single cam is correspondingly contacted with the high-pressure oil pump tappet, and the chain wheel is exposed out of the large-end mounting hole and is connected with a crankshaft of an engine in a matched mode through a chain wheel transmission component.
Furthermore, an oil inlet hole is formed in the middle of the large end of the oil pump mounting seat, and two oil return holes and a vent hole are formed in the end portion of the large end of the oil pump mounting seat.
Furthermore, the excircle of the shaft sleeve is a mounting surface, an inner hole is in a double-horn shape, and the inner hole consists of a section A in the middle, a section B in the left part and a section C in the right part; the section A is a cylindrical hole, and the sections B and C are tapered holes; the mounting surface of the shaft sleeve is in interference fit with the large-end mounting hole of the oil pump mounting seat, and the interference magnitude is 0.005-0.02 mm; the section A, the section B and the section C of the inner hole are in clearance fit with the intermediate shaft.
Furthermore, an annular oil groove is arranged on the wall of the cylindrical hole in the middle of the shaft sleeve, two oil holes communicated with the annular oil groove are arranged on the shaft sleeve, and an oil nozzle is arranged at the outlet of each oil hole.
Furthermore, the section A of the inner hole is in clearance fit with the middle shaft, and the fit clearance is 0.02-0.035 mm.
Further, the B section and the C section of the inner hole of the shaft sleeve are in clearance fit with the intermediate shaft, and the fit clearance is 0.03-0.045 mm.
Further, the engine oil flows in from an oil inlet hole of an oil pump mounting seat on the engine cylinder body, the oil pump driving mechanism stirs the engine oil, the engine oil flows to the matching surface of the intermediate shaft and the shaft sleeve through an oil hole on the shaft sleeve for lubrication, and then flows into the other oil hole on the shaft sleeve and an oil nozzle from the annular oil groove for injection, so that the engine oil is injected onto the high-pressure oil pump tappet for cooling and lubricating the high-pressure oil pump tappet.
Furthermore, the intermediate shaft and the single cam are in interference fit, and the interference magnitude is 0.04-0.06 mm.
Furthermore, the intermediate shaft and the chain wheel are in interference fit, and the interference magnitude is 0.04-0.06 mm.
The invention has the beneficial effects that:
after the single cam is optimally designed, the base circle diameter of the cam is reduced from phi 42mm to phi 32mm under the same use boundary of the high-pressure fuel pump; the dynamic moment of the intermediate shaft is reduced to 20N.m from 35 N.m; the contact stress of the single cam and the high-pressure oil pump tappet is reduced from 1900MPa to 1400 MPa. The power consumption of the whole system is greatly reduced, and the reliability is greatly improved.
Because the hole of oil pump actuating mechanism axle sleeve designs into two horn type structures, according to the simulation analysis of contact stress, the hole of two horn type structures is for penetrating cylindrical pore structure, and the biggest contact stress reduces to 75MPa by 210Mpa, and lubricated minimum oil film thickness increases to 0.85um by 0.1 um. The inner hole of the double-horn shape enables the contact stress to be more average, stress concentration can be avoided, and the strength of the shaft seat is effectively guaranteed.
The lubricating oil path arrangement is simple, the processing manufacturability is good, the oil pressure loss is small, the full utilization of the lubricating oil is ensured, and the power of the engine oil pump of the engine is not additionally increased greatly.
Drawings
FIG. 1 is a schematic diagram of a prior art high pressure fuel pump drive configuration;
FIG. 2 is a schematic view of a prior art high pressure oil pump tappet;
fig. 3 is a second schematic view of a conventional high-pressure oil pump tappet.
FIG. 4 is a schematic external view of the present invention;
FIG. 5 is a schematic structural view of an oil pump mount;
FIG. 6 is a schematic diagram of an oil pump drive mechanism;
FIG. 7 is a schematic view of the construction of the bushing;
FIG. 8 is a schematic view of the oil pump drive mechanism fitted within the large end of the oil pump mount;
fig. 9 is a schematic structural view of the present invention.
In the figure:
1-cylinder head;
2-camshaft, 21-cam;
3-high pressure oil pump tappet, 31-roller, 32-needle bearing, 33-sliding bearing;
4-high pressure fuel pump, 41-plunger;
5-intermediate shaft;
6-shaft sleeve, 60-inner hole, 61-mounting surface, 62-annular oil groove, 63-oil hole, 64-oil nozzle;
7-a sprocket;
8-a single cam;
9-an oil pump mounting seat, 91-a small end mounting hole, 92-a large end mounting hole, 93-an oil inlet hole, 94-an oil return hole and 95-a vent hole;
10-engine block.
Detailed Description
The invention is further described with reference to the accompanying drawings in which:
referring to fig. 4 to 9, a high pressure fuel pump driving structure includes an oil pump mounting base 9 disposed on an engine cylinder 10, and a compression ignition oil pump 4 cooperatively connected to the oil pump mounting base 9; the method is characterized in that:
the oil pump mounting seat 9 is in an L shape and is provided with a small end mounting hole 91 and a large end mounting hole 92; the high-pressure fuel pump 4 is matched and connected with the small end mounting hole 91, and the plunger 41 and the high-pressure fuel pump tappet 3 of the high-pressure fuel pump 4 are positioned in the small end mounting hole 91;
an oil pump driving mechanism is arranged in the large-end mounting hole 92 and comprises an intermediate shaft 5, a shaft sleeve 6 sleeved in the middle of the intermediate shaft, a chain wheel 7 connected with one end of the intermediate shaft in a matched mode and a single cam 8 connected with the other end of the intermediate shaft in a matched mode, the single cam is correspondingly contacted with the high-pressure oil pump tappet 3, and the chain wheel 7 is exposed out of the large-end mounting hole 92 and is connected with a crankshaft of an engine through a chain wheel transmission component in a matched mode.
An oil inlet hole 93 is arranged in the middle of the large end of the oil pump mounting seat 9, and two oil return holes 94 and a vent hole 95 are arranged at the end part of the large end of the oil pump mounting seat 9. The air vent is arranged, so that engine oil can effectively flow back; set up the oil gallery, can make the oil pump mount pad in form certain machine oil liquid level, make the cooperation can contact the machine oil level and effectual lubrication at the epaxial monomer cam of jackshaft, also can not accumulate too much machine oil.
The excircle of the shaft sleeve 6 is a mounting surface 61, an inner hole 60 is in a double-horn shape, and the inner hole 60 consists of a section A in the middle, a section B in the left part and a section C in the right part; the section A is a cylindrical hole, and the sections B and C are tapered holes; the mounting surface 61 of the shaft sleeve 6 is in interference fit with a large-end mounting hole 92 of the oil pump mounting seat 9, and the interference magnitude is 0.005-0.02 mm; the shaft sleeve and the oil pump mounting seat are matched and connected into a whole, and the driving chain wheel drives the single cam to rotate; the section A, the section B and the section C of the inner hole 60 are in clearance fit with the intermediate shaft 5. According to simulation analysis of contact stress, the maximum contact stress of the inner hole of the double-horn structure is reduced to 75MPa from 210MPa, and the minimum oil film thickness of lubrication is increased to 0.85um from 0.1um relative to the through cylindrical hole structure.
An annular oil groove 62 is arranged on the wall of a cylindrical hole in the middle of the shaft sleeve 6, two oil holes 63 communicated with the annular oil groove 62 are arranged on the shaft sleeve 6, and an oil nozzle 64 is arranged at the outlet of each oil hole 63.
The section A of the inner hole 60 is in clearance fit with the intermediate shaft 5, and the fit clearance is 0.02-0.035 mm.
Section B and the section C of the inner hole 60 of the shaft sleeve 6 are in clearance fit with the intermediate shaft 5, and the fit clearance is 0.03-0.045 mm.
The engine oil flows in from the oil inlet 93 of the oil pump mounting seat 9 on the engine cylinder 10, the oil pump driving mechanism stirs the engine oil, the engine oil flows to the matching surface of the intermediate shaft 5 and the shaft sleeve 6 through one oil hole 63 on the shaft sleeve 6 for lubrication, and then flows into the other oil hole 63 on the shaft sleeve 6 and the oil nozzle 64 from the annular oil groove 62 for injection, so that the engine oil is injected to the high-pressure oil pump tappet 3 for cooling and lubricating. The lubricating oil path is simple in arrangement, good in processing manufacturability and small in oil pressure loss, fully utilizes lubricating oil, and enables the power of an engine oil pump of the engine not to be additionally increased greatly.
The intermediate shaft 5 and the single cam 8 are in interference fit, and the interference magnitude is 0.04-0.06 mm.
The intermediate shaft 5 and the chain wheel 7 are in interference fit, and the interference magnitude is 0.04-0.06 mm.
Because the non-camshaft is used for driving the high-pressure fuel pump, a single cam is designed and is arranged on one end of the intermediate shaft in an interference fit manner so as to drive the high-pressure fuel pump; the other end interference fit sprocket of jackshaft, its drive ratio between the crankshaft with the engine can design freely to through chain drive, make the design of single cam more free, make the contact pressure between single cam and the high-pressure oil pump tappet reduce by a wide margin through suitable cam molded lines. And the roller rotating speed of the high-pressure oil pump tappet can be effectively reduced, and the service life of the high-pressure oil pump tappet is prolonged.
The invention is not to be considered as limited to the particular embodiments shown and described, but is to be understood to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.
Claims (9)
1. A high-pressure fuel pump driving structure comprises an oil pump mounting seat (9) arranged on an engine cylinder body (10), and a compression ignition oil pump (4) connected to the oil pump mounting seat (9) in a matching manner; the method is characterized in that:
the oil pump mounting seat (9) is in an L shape and is provided with a small end mounting hole (91) and a large end mounting hole (92); the high-pressure fuel pump (4) is matched and connected with the small end mounting hole (91), and a plunger (41) of the high-pressure fuel pump (4) and the high-pressure fuel pump tappet (3) are positioned in the small end mounting hole (91);
an oil pump driving mechanism is arranged in the large-end mounting hole (92), the oil pump driving mechanism comprises an intermediate shaft (5), a shaft sleeve (6) sleeved in the middle of the intermediate shaft, a chain wheel (7) connected with one end of the intermediate shaft in a matched mode, and a single cam (8) connected with the other end of the intermediate shaft in a matched mode, the single cam is correspondingly contacted with the high-pressure oil pump tappet (3), and the chain wheel (7) is exposed out of the large-end mounting hole (92) and is connected with a crankshaft of an engine in a matched mode through a chain wheel transmission component.
2. The high pressure fuel pump drive structure of claim 1, wherein: the oil pump mounting seat is characterized in that an oil inlet hole (93) is formed in the middle of the large end of the oil pump mounting seat (9), and two oil return holes (94) and a vent hole (95) are formed in the end of the large end of the oil pump mounting seat (9).
3. The high pressure fuel pump drive structure of claim 2, wherein: the excircle of the shaft sleeve (6) is an installation surface (61), an inner hole (60) is in a double-horn shape, and the inner hole (60) consists of a section A in the middle, a section B in the left part and a section C in the right part; the section A is a cylindrical hole, and the sections B and C are tapered holes; the mounting surface (61) of the shaft sleeve (6) is in interference fit with the large-end mounting hole (92) of the oil pump mounting seat (9), and the interference magnitude is 0.005-0.02 mm; the section A, the section B and the section C of the inner hole (60) are in clearance fit with the intermediate shaft (5).
4. The high pressure fuel pump drive structure of claim 3, wherein: an annular oil groove (62) is arranged on the wall of a cylindrical hole in the middle of the shaft sleeve (6), two oil holes (63) communicated with the annular oil groove (62) are formed in the shaft sleeve (6), and an oil nozzle (64) is arranged at the outlet of each oil hole (63).
5. The high pressure fuel pump drive structure of claim 3, wherein: the section A of the inner hole (60) is in clearance fit with the intermediate shaft (5), and the fit clearance is 0.02-0.035 mm.
6. The high pressure fuel pump drive structure of claim 3, wherein: the section B and the section C of the inner hole (60) of the shaft sleeve (6) are in clearance fit with the intermediate shaft (5), and the fit clearance is 0.03-0.045 mm.
7. The high pressure fuel pump drive structure of claim 4, wherein: the engine oil flows in from an oil inlet hole (93) of an oil pump mounting seat (9) on an engine cylinder body (10), the oil pump driving mechanism stirs the engine oil, the engine oil flows to the matching surface of the intermediate shaft (5) and the shaft sleeve (6) through one oil hole (63) on the shaft sleeve (6) to be lubricated, and then flows into the other oil hole (63) on the shaft sleeve (6) and the oil nozzle (64) from the annular oil groove (62) to be sprayed, so that the engine oil is sprayed onto the high-pressure oil pump tappet (3) to be cooled and lubricated.
8. The high pressure fuel pump drive structure of claim 1, wherein: the intermediate shaft (5) and the single cam (8) are in interference fit, and the interference magnitude is 0.04-0.06 mm.
9. The high pressure fuel pump drive structure of claim 1, wherein: the intermediate shaft (5) and the chain wheel (7) are in interference fit, and the interference magnitude is 0.04-0.06 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110310379.6A CN113006993A (en) | 2021-03-24 | 2021-03-24 | High pressure fuel pump driving structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110310379.6A CN113006993A (en) | 2021-03-24 | 2021-03-24 | High pressure fuel pump driving structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113006993A true CN113006993A (en) | 2021-06-22 |
Family
ID=76405675
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110310379.6A Pending CN113006993A (en) | 2021-03-24 | 2021-03-24 | High pressure fuel pump driving structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113006993A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114542344A (en) * | 2022-02-21 | 2022-05-27 | 重庆长安汽车股份有限公司 | Driving mechanism of high-pressure fuel pump |
| CN115234418A (en) * | 2022-06-17 | 2022-10-25 | 中国民航大学 | Horizontal opposed two-stroke aero-engine oil pump driving mechanism for burning negative carbon fuel |
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| CN115234418A (en) * | 2022-06-17 | 2022-10-25 | 中国民航大学 | Horizontal opposed two-stroke aero-engine oil pump driving mechanism for burning negative carbon fuel |
| CN115234418B (en) * | 2022-06-17 | 2023-09-26 | 中国民航大学 | Oil pump driving mechanism of horizontally opposed two-stroke aeroengine for burning negative carbon fuel |
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Application publication date: 20210622 |