CN113898725A - Crankshaft oil duct structure, engine and vehicle - Google Patents
Crankshaft oil duct structure, engine and vehicle Download PDFInfo
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- CN113898725A CN113898725A CN202111150698.1A CN202111150698A CN113898725A CN 113898725 A CN113898725 A CN 113898725A CN 202111150698 A CN202111150698 A CN 202111150698A CN 113898725 A CN113898725 A CN 113898725A
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- Prior art keywords
- oil
- journal
- oil passage
- hole
- oil hole
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/042—Guidance of lubricant
- F16H57/043—Guidance of lubricant within rotary parts, e.g. axial channels or radial openings in shafts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M1/00—Pressure lubrication
- F01M1/06—Lubricating systems characterised by the provision therein of crankshafts or connecting rods with lubricant passageways, e.g. bores
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M1/00—Pressure lubrication
- F01M1/16—Controlling lubricant pressure or quantity
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0434—Features relating to lubrication or cooling or heating relating to lubrication supply, e.g. pumps ; Pressure control
- F16H57/0435—Pressure control for supplying lubricant; Circuits or valves therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M1/00—Pressure lubrication
- F01M1/06—Lubricating systems characterised by the provision therein of crankshafts or connecting rods with lubricant passageways, e.g. bores
- F01M2001/062—Crankshaft with passageways
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lubrication Of Internal Combustion Engines (AREA)
Abstract
The invention relates to the technical field of vehicles, and particularly discloses a crankshaft oil duct structure, an engine and a vehicle. The main journal is provided with a through oil duct which is provided with a first oil hole and a second oil hole; the connecting rod journal is connected with the main journal, an oil supply duct is arranged between the connecting rod journal and the main journal, the oil supply duct and the penetrating oil duct are communicated with the communicating oil hole, and the oil supply duct is provided with a third oil hole positioned on the peripheral surface of the connecting rod journal; the first check valve is arranged between the first oil hole and the communicating oil hole and is configured to only allow oil to flow from the first oil hole to the communicating oil hole, and sufficient oil can enter the oil supply oil channel only by setting the first check valve between the first oil hole and the communicating oil hole of the through oil duct and only by enabling the pressure at the third oil hole to be smaller than the pressure at the second oil hole, so that the connecting rod bearing is lubricated, and the oil supply capacity of the connecting rod journal can be fully guaranteed.
Description
Technical Field
The invention relates to the technical field of vehicles, in particular to a crankshaft oil passage structure, an engine and a vehicle.
Background
For in-line engines, the existing crankshaft uses a main journal to supply oil to the adjacent rod journals to lubricate the rod bearings. An oil passage is arranged between each main journal and the connecting rod journal adjacent to the main journal, and the oil passage of the crankshaft is generally H-shaped, Y-shaped or straight-line-shaped.
At present, the design of a crankshaft oil passage takes an H-type and a Y-type as main streams, and takes the Y-type oil passage of an in-line engine crankshaft as an example, as shown in fig. 1, fig. 1 is a schematic structural diagram of the Y-type oil passage of the in-line engine crankshaft, the oil passage on a main journal 1-1 is a through oil passage 1-11, a connecting rod journal 2-1 and the main journal 1-1 are communicated through an oblique oil passage 2-11, wherein two openings of the oil passage on the main journal 1-1 are a first oil hole 1-111 and a second oil hole 1-112 respectively, and an opening of the oblique oil passage 2-11 on the outer peripheral surface of the connecting rod journal 2-1 is a third oil hole 2-111.
The schematic diagram of the oil supply structure of the Y-shaped oil passage of the crankshaft of the in-line engine is shown in fig. 2, wherein the main bearing upper bearing shell is provided with a main bearing upper bearing oil groove 4-1, a bearing gap 5-1 is formed between the main bearing journal 1-1 and the main bearing upper bearing shell, the bearing gap 5-1 can be communicated with the first oil hole 1-111 and the second oil hole 1-112, the lubricating oil provided by the main oil passage 3-1 can enter the through oil passage 1-11 through the main bearing upper bearing oil groove 4-1 and the bearing gap 5-1, the lubricating oil can enter the oblique oil passage 2-11 and flow out from the third oil hole 2-111 only when the resistance of the first oil hole 1-111 to the third oil hole 2-111 or the resistance of the second oil hole 1-112 to the third oil hole 2-111 is smaller than the resistance of the first oil hole 1-111 to the second oil hole 1-112, thereby providing lubrication to the connecting rod bearings on the connecting rod journal 2-1.
Because the through oil passage 1-11 has openings at both ends and the flow resistance of the through oil passage is much smaller than that of the through oil passage 2-11, the lubricating oil flows in from one end of the through oil passage 1-11 and flows out from the other end without entering the inclined oil passage 2-11, and even more, when the pressure of the lubricating oil in the bearing clearance 5-1 is lower than that of the through oil passage 1-11, the lubricating oil flows back to the main bearing clearance 5-1 from the through oil passage 1-11, and the two situations cause the problem that the lubricating oil amount of the connecting rod bearing is small.
Disclosure of Invention
The invention aims to: the utility model provides a crankshaft oil duct structure, engine and vehicle to solve the crankshaft oil duct among the correlation technique and supply oil for the connecting rod journal through the main journal, the less problem of fuel feeding volume.
The invention provides a crankshaft oil passage structure, which comprises:
the oil pump comprises a main journal, a first oil hole and a second oil hole, wherein the main journal is provided with a through oil duct;
the connecting rod journal is connected with the main journal, an oil supply duct is arranged between the connecting rod journal and the main journal, the oil supply duct and the penetrating oil duct are communicated with the communicating oil hole, and the oil supply duct is provided with a third oil hole positioned on the peripheral surface of the connecting rod journal;
a first check valve provided to the through oil passage and between the first oil hole and the communication oil hole, the first check valve being configured to allow only oil to flow from the first oil hole to the communication oil hole.
As a preferred technical scheme of the crankshaft oil passage structure, the oil supply passage is a linear oil passage, and an included angle is formed between the extending direction of the oil supply passage and the axial direction of the main journal.
As a preferable technical solution of the crankshaft oil passage structure, the oil supply passage includes a first oil passage and a second oil passage, the first oil passage and the through oil passage are communicated with the communicating oil hole, the second oil passage passes through the connecting rod journal, the third oil hole is located at one end of the second oil passage, and the second oil passage further has a fourth oil hole located at an outer circumferential surface of the connecting rod journal.
As a preferred technical scheme of the crankshaft oil passage structure, the main journal is further provided with a mounting groove, the through oil passage is communicated with the mounting groove, the inner diameter of the through oil passage is smaller than that of the mounting groove, and the first check valve is located in the mounting groove and abutted against the bottom surface of the mounting groove.
As the preferable technical scheme of the crankshaft oil duct structure, the crankshaft oil duct structure further comprises a hollow plug, an internal thread is arranged on the side wall of the mounting groove, an external thread is arranged on the hollow plug, the internal thread is in threaded connection with the external thread, and the hollow plug is abutted to the first one-way valve.
As a preferable mode of the structure of the crankshaft oil passage, a second check valve is further included, the second check valve being provided in the through oil passage and being located between the second oil hole and the communication oil hole, the second check valve being configured to allow only oil to flow from the second oil hole to the communication oil hole.
The invention also provides an engine, and a crankshaft of the engine is provided with the crankshaft oil passage structure in any one of the above schemes.
As a preferable technical scheme of the engine, the engine is an in-line six-cylinder engine.
As a preferred technical scheme of the engine, two ends of the crankshaft are respectively a free end and a power output end, and the free end to the power output end are sequentially a first main journal, a first rod journal, a second main journal, a second rod journal, a third main journal, a third rod journal, a fourth main journal, a fourth rod journal, a fifth main journal, a fifth rod journal, a sixth main journal, a sixth rod journal and a seventh main journal;
the crankshaft oil passage structure is provided at least between the second main journal and the second rod journal, and between the fifth main journal and the fifth rod journal.
The invention also provides a vehicle comprising the engine in the scheme.
The invention has the beneficial effects that:
the invention provides a crankshaft oil duct structure, an engine and a vehicle. The main journal is provided with a through oil duct which is provided with a first oil hole and a second oil hole; the connecting rod journal is connected with the main journal, an oil supply duct is arranged between the connecting rod journal and the main journal, the oil supply duct and the penetrating oil duct are communicated with the communicating oil hole, and the oil supply duct is provided with a third oil hole positioned on the peripheral surface of the connecting rod journal; the first check valve is arranged between the first oil hole and the communicating oil hole and is configured to only allow oil to flow from the first oil hole to the communicating oil hole, and sufficient oil can enter the oil supply oil channel only by setting the first check valve between the first oil hole and the communicating oil hole of the through oil duct and only by enabling the pressure at the third oil hole to be smaller than the pressure at the second oil hole, so that the connecting rod bearing is lubricated, and the oil supply capacity of the connecting rod journal can be fully guaranteed.
Drawings
FIG. 1 is a schematic view of a Y-shaped oil passage structure of a crankshaft of an inline engine in the background art of the present invention;
FIG. 2 is a schematic diagram of a Y-shaped oil passage of a crankshaft of an inline engine during oil supply in the background of the invention;
FIG. 3 is a schematic diagram of a Y-shaped structure of a crankshaft oil passage structure in an embodiment of the present invention;
FIG. 4 is a schematic diagram of an H-shaped structure of the crankshaft oil passage structure in the embodiment of the invention.
In the figure:
1-1, main journal; 1-11 parts of a through oil duct; 1-111, a first oil hole; 1-112, a second oil hole; 2-1 connecting rod journal; 2-11, an inclined oil duct; 2-111, a third oil hole; 3-1, a main oil gallery; 4-1, an oil groove of an upper bearing shell of the main bearing; 5-1, bearing clearance;
1. a main journal; 11. a through oil passage; 111. a first oil hole; 112. a second oil hole;
2. a connecting rod journal; 21. a third oil hole; 22. a fourth oil hole;
3. an oil supply duct; 31. a first oil passage; 32. a second oil passage;
4. the communication oil hole;
5. a first check valve;
6. mounting grooves;
7. and (4) a hollow plug.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Where the terms "first position" and "second position" are two different positions, and where a first feature is "over", "above" and "on" a second feature, it is intended that the first feature is directly over and obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the prior art, an upper bearing bush of a main bearing of an engine crankshaft is provided with an upper bearing bush oil groove of the main bearing, a bearing gap is formed between the main bearing journal 1 and the upper bearing bush of the main bearing, the bearing gap can be communicated with the first oil hole 111 and the second oil hole 112, lubricating oil provided by a main oil passage can enter the through oil passage 11 through the upper bearing bush oil groove of the main bearing and the bearing gap, and only when the resistance of the first oil hole 111 to the third oil hole 21 or the resistance of the second oil hole 112 to the third oil hole 21 is smaller than the resistance of the first oil hole 111 to the second oil hole 112, the lubricating oil can enter the inclined oil passage and flow out of the third oil hole 21, so that lubrication is provided for a connecting rod bearing on the connecting rod journal 2.
Since the through oil passage 11 has openings at both ends and its own flow resistance is much smaller than that of the oil entering the oblique oil passage, a situation may occur in which the lubricating oil flows in from one end of the through oil passage 11 and flows out from the other end without entering the oblique oil passage, and even more, when the pressure of the lubricating oil in the bearing clearance is lower than that of the through oil passage 11, the lubricating oil may flow back into the main bearing clearance from the through oil passage 11, which causes a problem in that the amount of lubricating oil in the connecting rod bearing is small.
In this regard, as shown in fig. 3 and 4, the present embodiment provides a crankshaft oil passage structure including a main journal 1, a connecting rod journal 2, and a first check valve 5. Wherein the main journal 1 is provided with a through oil passage 11, and the through oil passage 11 has a first oil hole 111 and a second oil hole 112; the connecting rod journal 2 is connected with the main journal 1, an oil supply passage 3 is arranged between the connecting rod journal 2 and the main journal 1, the oil supply passage 3 and the through oil passage 11 are communicated with the communicating oil hole 4, and the oil supply passage 3 is provided with a third oil hole 21 positioned on the peripheral surface of the connecting rod journal 2; a first check valve 5 is provided in the through oil passage 11 between the first oil hole 111 and the communication oil hole 4, the first check valve 5 being configured to allow oil to flow only from the first oil hole 111 to the communication oil hole 4.
The crankshaft oil passage structure provided by the embodiment is characterized in that the first check valve 5 is arranged between the first oil hole 111 penetrating through the oil passage 11 and the communicating oil hole 4, the first check valve 5 allows oil to enter the penetrating oil passage 11 from the first oil hole 111 and can prevent the oil penetrating through the oil passage 11 from flowing out of the first oil hole 111 through the first check valve 5, and therefore, after the first check valve 5 is arranged, enough oil can enter the oil supply oil passage 3 only by the fact that the pressure of the third oil hole 21 is smaller than the pressure of the second oil hole 112, so that the connecting rod bearing is lubricated, and the oil supply capacity of the connecting rod journal 2 can be fully guaranteed.
In this embodiment, as shown in fig. 3, the oil supply passage 3 is a linear oil passage, and an extending direction of the oil supply passage 3 forms an included angle with an axial direction of the main journal 1. The oil supply passage 3 and the through oil passage 11 are integrally arranged in a Y shape.
As an alternative, as shown in fig. 4, the oil supply passage 3 includes a first oil passage 31 and a second oil passage 32, the first oil passage 31 communicates with the through oil passage 11 to communicate with the communication oil hole 4, the second oil passage 32 passes through the connecting rod journal 2, and the third oil hole 21 is located at one end of the second oil passage 32, and the second oil passage 32 further has a fourth oil hole 22 located at the outer circumferential surface of the connecting rod journal 2. At this time, the oil supply passage 3 and the through oil passage 11 are integrally H-shaped.
Optionally, the main journal 1 is further provided with a mounting groove 6, the through oil duct 11 is communicated with the mounting groove 6, the inner diameter of the through oil duct 11 is smaller than that of the mounting groove 6, the first check valve 5 is located in the mounting groove 6, and the first check valve 5 abuts against the bottom surface of the mounting groove 6. Because the internal diameter that runs through oil duct 11 is less than the internal diameter of mounting groove 6 to form step-like structure between the bottom surface that runs through oil duct 11 and mounting groove 6, can carry out one-way spacing to first check valve 5 through the bottom surface of mounting groove 6.
Preferably, the crankshaft oil passage structure further comprises a hollow plug 7, the side wall of the mounting groove 6 is provided with an internal thread, the hollow plug 7 is provided with an external thread, the internal thread is in threaded connection with the external thread, and the hollow plug 7 is abutted to the first check valve 5. Therefore, the first one-way valve 5 can be limited in two directions through the hollow plug 7 and the bottom surface of the mounting groove 6. It will be appreciated that the first check valve 5 is in sealing engagement with the side wall of the mounting slot 6 to prevent leakage of oil from between the first check valve 5 and the side wall of the mounting slot 6. Wherein the first one-way valve 5 is preferably a duckbill one-way valve made of a rubber material.
Optionally, the crankshaft oil passage structure further includes a second check valve provided to the through oil passage 11 and between the second oil hole 112 and the communication oil hole 4, the second check valve being configured to allow oil to flow only from the second oil hole 112 to the communication oil hole 4. Through setting up the second check valve, the cooperation of second check valve and first check valve 5 can avoid fluid from running through oil duct 11 and flow out through first oilhole 111 and second oilhole 112 to as long as fluid can flow into to running through oil duct 11 from the bearing clearance, just accessible oil supply oil duct 3 provides the lubrication for the connecting rod bearing, can further guarantee the fuel feeding ability to the connecting rod bearing.
The embodiment also provides an engine, and a crankshaft of the engine is provided with the crankshaft oil passage structure in the scheme. Therefore, the connecting rod bearing on the crankshaft of the engine can have a good lubricating effect, and cavitation erosion can be avoided.
In the present embodiment, an exemplary scheme is given in which the engine is an in-line six-cylinder engine, two ends of the crankshaft are respectively a free end and a power output end, and the free end to the power output end are sequentially a first main journal, a first rod journal, a second main journal, a second rod journal, a third main journal, a third rod journal, a fourth main journal, a fourth rod journal, a fifth main journal, a fifth rod journal, a sixth main journal, a sixth rod journal and a seventh main journal. And the first connecting rod bearing to the sixth connecting rod bearing are sequentially arranged on the first connecting rod journal to the sixth connecting rod journal.
As shown in table 1, table 1 is a statistical table of the oil amount of the lubricating oil in each connecting rod bearing when the Y-shaped oil passage is adopted in the prior art inline six-cylinder engine.
TABLE 1 statistics of lubricating oil mass of each connecting rod bearing of in-line six-cylinder engine in prior art
As can be seen from table 1, in the in-line six-cylinder engine in the prior art, the amount of lubricating oil in the second connecting rod bearing to the fifth connecting rod bearing is relatively small, and particularly, the inflow oil amount of the second connecting rod bearing and the inflow oil amount of the fifth connecting rod bearing are significantly smaller than the outflow oil amount, which indicates that the oil filling rate of the second connecting rod bearing and the fifth connecting rod bearing is smaller than 1, which is not favorable for establishing a lubricating oil film of the bearing, weakens the bearing capacity of the bearing, has a cavitation region, and the bearing is prone to cavitation erosion.
In this regard, in the present embodiment, the crank oil passage structure is provided at least between the second main journal and the second rod journal, and between the fifth main journal and the fifth rod journal. Preferably, the crankshaft oil passage structure is arranged between the second main journal and the second connecting rod journal, between the third main journal and the third connecting rod journal, between the fourth main journal and the fourth connecting rod journal, and between the fifth main journal and the fifth connecting rod journal. By taking the crankshaft oil duct structure arranged between the second main journal and the second connecting rod journal and the first check valve arranged on the crankshaft oil duct structure as an example, compared with the scheme in the prior art, the lubricating oil quantity of the second connecting rod bearing can be increased to 3.7 times of the scheme in the prior art through bench test analysis.
The embodiment also provides a vehicle which comprises the engine in the scheme.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A crankshaft oil passage structure, comprising:
a main journal (1), the main journal (1) being provided with a through oil passage (11), the through oil passage (11) having a first oil hole (111) and a second oil hole (112);
the connecting rod journal (2) is connected with the main journal (1), an oil supply duct (3) is arranged between the connecting rod journal (2) and the main journal (1), the oil supply duct (3) is communicated with the through oil duct (11) through the communicating oil hole (4), and the oil supply duct (3) is provided with a third oil hole (21) positioned on the outer peripheral surface of the journal (2);
a first check valve (5) provided to the through oil passage (11) and between the first oil hole (111) and the communication oil hole (4), the first check valve (5) being configured to allow only oil to flow from the first oil hole (111) to the communication oil hole (4).
2. The crankshaft oil passage structure as claimed in claim 1, wherein the oil supply passage (3) is a straight-line type passage, and the extending direction of the oil supply passage (3) has an angle with the axial direction of the main journal (1).
3. The crankshaft oil passage structure according to claim 1, wherein the oil supply passage (3) includes a first oil passage (31) and a second oil passage (32), the first oil passage (31) and the through oil passage (11) communicate with the communication oil hole (4), the second oil passage (32) extends through the connecting rod journal (2), and the third oil hole (21) is located at one end of the second oil passage (32), the second oil passage (32) further having a fourth oil hole (22) located at an outer peripheral surface of the connecting rod journal (2).
4. The crankshaft oil passage structure according to claim 1, wherein the main journal (1) is further provided with a mounting groove (6), the through oil passage (11) is communicated with the mounting groove (6), the inner diameter of the through oil passage (11) is smaller than that of the mounting groove (6), the first check valve (5) is located in the mounting groove (6) and the first check valve (5) abuts against the bottom surface of the mounting groove (6).
5. The crankshaft oil passage structure according to claim 4, further comprising a hollow plug (7), wherein the side wall of the mounting groove (6) is provided with an internal thread, the hollow plug (7) is provided with an external thread, the internal thread and the external thread are in threaded connection, and the hollow plug (7) is abutted against the first check valve (5).
6. The crankshaft oil passage structure according to any one of claims 1 to 5, further comprising a second check valve that is provided to the through oil passage (11) and that is located between the second oil hole (112) and the communication oil hole (4), the second check valve being configured to allow only oil to flow from the second oil hole (112) to the communication oil hole (4).
7. An engine characterized in that a crankshaft of the engine is provided with the crankshaft oil passage structure according to any one of claims 1 to 6.
8. The engine of claim 7, wherein the engine is an inline six cylinder engine.
9. The engine of claim 8, wherein two ends of the crankshaft are a free end and a power output end respectively, and the free end to the power output end are a first main journal, a first rod journal, a second main journal, a second rod journal, a third main journal, a third rod journal, a fourth main journal, a fourth rod journal, a fifth main journal, a fifth rod journal, a sixth main journal, a sixth rod journal and a seventh main journal in sequence;
the crankshaft oil passage structure is provided at least between the second main journal and the second rod journal, and between the fifth main journal and the fifth rod journal.
10. A vehicle comprising an engine as claimed in any one of claims 7 to 9.
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| CN202111150698.1A CN113898725A (en) | 2021-09-29 | 2021-09-29 | Crankshaft oil duct structure, engine and vehicle |
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| CN202111150698.1A CN113898725A (en) | 2021-09-29 | 2021-09-29 | Crankshaft oil duct structure, engine and vehicle |
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| US6202620B1 (en) * | 1998-09-04 | 2001-03-20 | Nissan Motor Co., Ltd. | Lubricating structure for internal combustion engine |
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| JP2015007389A (en) * | 2013-06-25 | 2015-01-15 | 三菱自動車工業株式会社 | Oil supply structure of engine |
| CN205533740U (en) * | 2016-02-15 | 2016-08-31 | 东风朝阳朝柴动力环保科技有限公司 | Diesel engine's bent axle assembly |
| CN109386341A (en) * | 2017-08-02 | 2019-02-26 | 曼卡车和巴士股份公司 | Device for lubricating internal combustion engines |
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