CN115217666A - Cylinder head, engine and vehicle - Google Patents
Cylinder head, engine and vehicle Download PDFInfo
- Publication number
- CN115217666A CN115217666A CN202210473385.8A CN202210473385A CN115217666A CN 115217666 A CN115217666 A CN 115217666A CN 202210473385 A CN202210473385 A CN 202210473385A CN 115217666 A CN115217666 A CN 115217666A
- Authority
- CN
- China
- Prior art keywords
- oil return
- channel
- return channel
- return passage
- cylinder head
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000003860 storage Methods 0.000 claims description 9
- 238000005266 casting Methods 0.000 abstract description 14
- 239000003921 oil Substances 0.000 description 219
- 239000010705 motor oil Substances 0.000 description 20
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000010721 machine oil Substances 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F1/00—Cylinders; Cylinder heads
- F02F1/24—Cylinder heads
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
The invention provides a cylinder cover, an engine and a vehicle, which comprise a cylinder cover main body, wherein an oil pool chamber is formed at the upper side of the cylinder cover main body, and a plurality of main oil return channels which are communicated along the thickness direction of the cylinder cover main body are sequentially formed at the bottom of the oil pool chamber along the center line of the cylinder cover. The main oil return channel is a channel which gradually shrinks from top to bottom, the main oil return channel comprises an upper oil return channel, a middle oil return channel and a lower oil return channel which are sequentially connected from top to bottom, the upper oil return channel is a linear gradually-shrinking channel, the middle oil return channel is an arc gradually-shrinking channel, and the lower oil return channel is a linear gradually-shrinking channel; wherein, the side wall of the middle oil return channel protrudes towards the direction of the center line of the middle oil return channel. On the premise of ensuring the oil return efficiency, the invention simplifies the arrangement difficulty and the arrangement quantity of the channels in the cylinder cover, keeps the compactness of the cylinder cover, does not influence the arrangement of other pipelines in the engine room, and also meets the requirement of casting manufacturability.
Description
Technical Field
The invention belongs to the technical field of vehicle parts and particularly relates to a cylinder cover, an engine and a vehicle.
Background
The engine is the heart of an automobile, different automobile types have different arrangement requirements on the engine, and the engine is arranged in a transverse mode, a longitudinal mode and the like, and the oil return efficiency of the cylinder cover of the engine is influenced due to different requirements on the installation inclination angle of the engine by different arrangement modes.
In order to meet the oil return efficiency of engines in different arrangement modes, the oil return structures of the existing cylinder covers are mainly divided into the following two types: 1) An oil return channel is arranged at the bottom of an oil pool chamber of the cylinder cover, and an end part of the cylinder cover, which is far away from the timing end, is specially connected with an oil return pipeline; 2) An oil return channel is arranged at the bottom of the oil pool chamber of the cylinder cover, and an independent crankcase gas taking channel is arranged at the other side of the cylinder cover. In summary, the first external oil return pipeline mode enables the arrangement of an oil return channel in the cylinder cover to be simple, but the oil return pipeline is high in setting cost, the difficulty in arranging pipelines in the engine room is increased, and the external pipelines are also easily subjected to high-temperature radiation of an engine exhaust passage to influence the service life; in the second type of mode, because oil return passage and independent gas taking channel exist simultaneously, lead to the increase of cylinder head volume and weight, be difficult to satisfy the demand that the compactness was arranged, the sealed degree of difficulty of independent gas taking hole and camshaft cylinder cap is great, and the cylinder head casting precision is relatively poor, needs great sealed boundary to compensate the casting deviation, has increased the sealed degree of difficulty between cylinder head and the cylinder body.
Disclosure of Invention
The embodiment of the invention provides a cylinder cover, an engine and a vehicle, and aims to meet the requirements of different engine arrangement scenes on oil return efficiency, and meet the requirements of no influence on pipeline arrangement in an engine room, compact structure and good casting manufacturability.
In order to realize the purpose, the invention adopts the technical scheme that:
in a first aspect, there is provided a cylinder head comprising:
the cylinder cover comprises a cylinder cover main body, wherein an oil pool chamber is formed on the upper side of the cylinder cover main body, and a plurality of main oil return channels which are communicated along the thickness direction of the cylinder cover main body are sequentially formed in the bottom of the oil pool chamber along the center line of the cylinder cover;
the main oil return channel is a channel gradually contracted from top to bottom, and comprises an upper oil return channel, a middle oil return channel and a lower oil return channel which are sequentially connected from top to bottom, wherein the upper oil return channel is a linear gradually-contracted channel, the middle oil return channel is an arc line gradually-contracted channel, and the lower oil return channel is a linear gradually-contracted channel;
the side wall of the middle oil return channel protrudes towards the direction of the center line of the middle oil return channel.
With reference to the first aspect, in a possible implementation manner, a plane where a center line of each main oil return passage is located is defined as a reference plane, and the reference plane is parallel to a center plane of a cylinder head;
defining an included angle between two sidelines of the side wall of the upper oil return channel on the reference plane as alpha 1 An included angle between two side lines of the side wall of the lower oil return channel on the reference plane is alpha 2 Alpha, the alpha 1 And alpha 2 Satisfies the following conditions: alpha is not more than 1 degree 2 ≤ɑ 1 ≤45°。
With reference to the first aspect, in a possible implementation manner, a distance between end points of two side lines of the side wall of the upper oil return channel on the reference plane is defined as d 1 Defining the distance between the lower end points of the two side lines of the side wall of the lower oil return channel on the reference plane as d 2 D is said 1 And d is 2 Satisfies the following conditions: d is not less than 3mm 2 ≤d 1 。
With reference to the first aspect, in one possible implementation manner, the d 1 And d is said 2 Satisfies the following conditions: d 1 ＝2d 2 。
With reference to the first aspect, in one possible implementation manner, the height of the upper oil return channel is defined as h 1 Defining the sum of the heights of the middle oil return channel and the lower oil return channel as h 2 H is said 1 And h is said 2 Satisfies the following conditions: h is a total of 1 ≥0.2h 2 ；
The cross section area of the upper oil return channel at any height is larger than the maximum cross section area of the lower oil return channel.
With reference to the first aspect, in a possible implementation manner, the main oil return passage further includes a bottom oil return passage formed by outward expanding a lower port of the lower oil return passage in a direction away from a center line of the main oil return passage, and the bottom oil return passage and an end surface of the corresponding oil return passage on the cylinder body are matched to form a temporary oil storage space.
With reference to the first aspect, in a possible implementation manner, the height of the bottom oil return channel is defined as h 4 Defining the height of the cylinder head main body as H, H 4 And H satisfies: h is not less than 2mm 4 ≤0.1H。
With reference to the first aspect, in one possible implementation manner, the main oil return passage is definedOverall height h 3 Defining the height of the cylinder head main body as H, H 3 And H satisfies: h is 3 ≥0.4H。
With reference to the first aspect, in a possible implementation manner, three main oil return passages are provided, and the three main oil return passages are sequentially defined as a first oil return passage, a second oil return passage, and a third oil return passage along a preset direction, where the preset direction is a direction that is away from a timing end of the cylinder head main body along a center line of the cylinder head;
at the same height position, the cross-sectional area of the first oil return channel is defined as S 1 And the cross-sectional area of the second oil return passage is defined as S 2 And the cross-sectional area of the third oil return passage is defined as S 3 Said S 1 The S 2 And said S 3 Satisfies the following conditions: s. the 3 ≥S 1 ≥S 2 。
With reference to the first aspect, in a possible implementation manner, a timing cavity oil return passage is further formed at a timing end of the cylinder head main body, and S 1 The S 2 And said S 3 Satisfies the following conditions: s. the 3 ≥S 1 +S 2 。
With reference to the first aspect, in one possible implementation manner, the cross-sectional area of the timing chamber oil return passage is defined as S 4 Said S 4 Said S 1 The S 2 And said S 3 Satisfies the following conditions: s 4 ＞S 1 +S 2 +S 3 。
Compared with the prior art, the main oil return channel is arranged in a vertically through mode and directly communicated with the oil return channel of the cylinder body, an external pipeline is not needed, and a crankcase gas taking channel is not needed; and the upper oil return passage and the lower oil return passage which form the main oil return passage are both linearly tapered, and the upper oil return passage and the lower oil return passage are transited through the middle oil return passage which is tapered through an arc line, so that the engine oil can flow downwards along the side wall of the main oil return passage, the oil return efficiency is ensured, the molding difficulty of the casting sand core can be reduced, and the arrangement of a valve spring mounting hole on the cylinder cover and a cylinder cover bolt hole is prevented from being influenced. According to the embodiment of the application, on the premise of ensuring the oil return efficiency, the channel arrangement difficulty and the arrangement quantity in the cylinder cover are simplified, the compactness of the cylinder cover is kept, the arrangement of other pipelines in the engine room is not influenced, and the requirement of casting manufacturability is also met.
In a second aspect, an embodiment of the present invention further provides an engine, including the cylinder head described above.
Compared with the prior art, the scheme shown in the embodiment of the application has the advantages that by adopting the cylinder cover, on the premise of keeping the oil return efficiency, the integral structure compactness of the engine is ensured, the arrangement difficulty of the engine is favorably reduced, and the integral manufacturing cost of the engine can be reduced.
In a third aspect, an embodiment of the invention further provides a vehicle, which includes the engine.
Compared with the prior art, the scheme shown in the embodiment of the application can meet the oil return efficiency requirements of different engine arrangement scenes and can also meet the engine platformization requirements by adopting the engine.
Drawings
FIG. 1 is a schematic bottom view of a cylinder head according to an embodiment of the present invention;
FIG. 2 is a schematic side view of a cylinder head according to an embodiment of the present invention;
FIG. 3 isbase:Sub>A cross-sectional view A-A of FIG. 2, where the section A-A isbase:Sub>A reference plane;
fig. 4 is a partially enlarged view of the third oil return passage in fig. 3.
Description of reference numerals:
1. a cylinder head main body; 1a, a cylinder cover central line; 1b, a timing end;
2. an oil sump chamber;
3. a main oil return passage; 3a, a first oil return channel; 3b, a second oil return passage; 3c, a third oil return passage; 310. an upper oil return channel; 320. a middle oil return passage; 330. a lower oil return channel; 340. a bottom oil return channel;
4. a reference plane;
5. and a timing chamber oil return passage.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention.
Referring to fig. 1 to 4 together, the cylinder head according to the present invention will now be described. The cylinder cover comprises a cylinder cover main body 1, an oil pool chamber 2 is formed on the upper side of the cylinder cover main body 1, and a plurality of main oil return channels 3 which are communicated along the thickness direction of the cylinder cover main body 1 are sequentially formed in the bottom of the oil pool chamber 2 along the center line 1a of the cylinder cover. The main oil return passage 3 is a passage which gradually shrinks from top to bottom, the main oil return passage 3 comprises an upper oil return passage 310, a middle oil return passage 320 and a lower oil return passage 330 which are sequentially connected from top to bottom, the upper oil return passage 310 is a linear gradually-reduced passage, the middle oil return passage 320 is an arc gradually-reduced passage, and the lower oil return passage 330 is a linear gradually-reduced passage; wherein, the side wall of the middle oil return passage 320 protrudes towards the direction of the center line thereof.
It should be noted that, in this embodiment, the cross-sectional shapes of the upper oil return passage 310, the middle oil return passage 320, and the lower oil return passage 330 may be circular, elliptical, and the like, which can meet the performance requirements of the casting process and the oil drainage, and this is not limited herein.
In this embodiment, the upper oil gallery 310, the middle oil gallery 320 and the lower oil gallery 330 may be formed by casting with the same casting core.
Compared with the prior art, the cylinder cover provided by the embodiment has the advantages that the main oil return channel 3 is arranged in a vertically through manner and is directly communicated with the oil return channel of the cylinder body, engine oil in the oil sump chamber 2 flows to the oil return channel of the cylinder body along the side wall of the main oil return channel 3 under the action of gravity, an external pipeline is not needed, a crankcase gas taking channel is not needed, and the space occupied by the internal channel of the cylinder cover main body 1 is reduced; in addition, the upper oil return passage 310 and the lower oil return passage 330 which form the main oil return passage 3 are both linearly tapered, and the upper oil return passage and the lower oil return passage are transited through the middle oil return passage 320 which is tapered through an arc line, so that engine oil can flow downwards along the side wall of the main oil return passage 3, the oil return efficiency is ensured, the molding difficulty of the casting sand core can be reduced, and the arrangement of a valve spring mounting hole on the cylinder cover and a cylinder cover bolt hole is prevented from being influenced. The embodiment of the application simplifies the arrangement difficulty and the arrangement quantity of the channels in the cylinder cover on the premise of ensuring the oil return efficiency, maintains the compactness of the cylinder cover, does not influence the arrangement of other pipelines in the engine room, and also meets the requirement of casting manufacturability.
In some embodiments, referring to fig. 4, the plane in which the centre line of each main oil return channel 3 is defined is a reference plane 4, the reference plane 4 being parallel to the head centre plane; an included angle between two edge lines of the sidewall of the upper oil gallery 310 on the reference plane 4 is defined as a 1 An included angle between two sidelines of the sidewall of the lower oil return passage 330 on the reference plane 4 is α 2 ，ɑ 1 And alpha 2 Satisfies the following conditions: alpha is not more than 1 degree 2 ≤ɑ 1 ≤45°。
The angle of the two included angles is reasonably limited in the embodiment, so that the inclination degree of the side walls of the upper oil return passage 310 and the lower oil return passage 330 is practically and reasonably limited, oil drops in the oil pool chamber 2 on the cylinder cover main body 1 can conveniently flow back to the oil pool chamber of the cylinder body along the main oil return channel 3, and the backflow resistance is reduced; and effectively avoid alpha 1 And alpha 2 The problem that the molding difficulty of the casting sand core is high due to over-small size, the production cost is increased is solved, the problem that the arrangement of a valve spring mounting hole and a cylinder cover bolt hole in the cylinder cover main body 1 is influenced due to over-large alpha 1 and alpha 2 is avoided, the problem that the size of the cylinder cover main body 1 is too large due to over-dispersed hole channel arrangement in the cylinder cover main body 1 is avoided, and the adverse influence on the miniaturization arrangement of an engine is avoided.
In some embodiments, referring to FIG. 4, the sidewall of the upper oil gallery 310 is defined to have a distance d between the ends of the two lines on the reference plane 4 1 The distance between the two lower end points of the side wall of the lower oil return channel 330 on the reference plane 4 is defined as d 2 ，d 1 And d 2 Satisfies the following conditions: d is not less than 3mm 2 ≤d 1 . In the embodiment, the width of the upper oil return passage 310 and the width of the lower oil return passage 320 are further optimized by combining the reasonable control of the included angle, so that the problem that the strength of the sand core is small and easy to break due to too small width, which affects the casting forming is solved, and the problem that the oil return effect is affected due to too small width is also avoidedThe problem of rate.
On the basis of the above embodiment, the present embodiment further optimizes d 1 And d 2 With respect to (b), the following relationship is satisfied: d 1 ＝2d 2 So that the smoothness of oil return and the manufacturability of casting are effectively balanced.
In some embodiments, referring to FIG. 4, the height of upper oil gallery 310 is defined as h 1 The sum of the heights of the middle oil return passage 320 and the lower oil return passage 330 is defined as h 2 ，h 1 And h 2 Satisfies the following conditions: h is 1 ≥0.2h 2 (ii) a The cross-sectional area of the upper oil return 310 at any height is larger than the maximum cross-sectional area of the lower oil return 330. Since the lower oil return passage 330 is a tapered structure, the maximum cross-sectional area thereof is the opening area of the top end thereof.
The present embodiment combines the limitation of the above embodiments on the widths of the upper oil return passage 310 and the lower oil return passage 330, and by reasonably setting the heights and cross-sectional areas of the upper oil return passage 310 and the lower oil return passage 330, under the same unit height, the engine oil in the upper oil return passage 310 can play a role in pushing and accelerating the engine oil in the lower oil return passage 330 under the action of gravity, so as to improve the circulation rate of the engine oil in the main oil return passage 3, and further improve the oil return efficiency.
In some embodiments, referring to fig. 1 to 4, the main oil return passage 3 further includes a bottom oil return passage 340 formed by expanding the lower port of the lower oil return passage 330 outward in a direction away from the center line thereof, and the bottom oil return passage 340 cooperates with the end surface of the corresponding oil return passage on the cylinder to form a temporary oil storage space. The oil storage space can temporarily store a small amount of engine oil, when the pressure of an engine crankcase fluctuates or the pressure is too large to cause the oil droplets of the oil return channel to flow downwards difficultly, the pressure brought by the crankcase can be overcome by the small amount of engine oil temporarily stored in the oil storage space, the effect of circulation of the engine oil in the oil return channel of the cylinder body can still be realized, the continuity of the oil return process is ensured, and the oil return efficiency is improved. It should be noted that, when the pressure of the crankcase is recovered to normal, the engine oil in the main oil return passage 3 returns to normal flow, and the oil storage space can still obtain a certain amount of engine oil in the normal flow process of the engine oil.
In this embodiment, the bottom oil gallery 340 is formed differently from the upper oil gallery 310, the lower oil gallery 330 and the middle oil gallery 320, and the bottom oil gallery 340 is integrally formed with the bottom surface of the cylinder head body 1.
In order to optimize the oil storage capacity of the oil storage space and ensure that the engine oil can flow into the oil return channel of the cylinder body under special conditions, referring to fig. 1 and 4, the height h of the bottom oil return channel 340 is defined 4 H, H is defined as the height of the cylinder head body 1 4 And H satisfies: h is not less than 2mm 4 ≤0.1H。
In some embodiments, referring to fig. 1 and 4, the height of the main oil return channel 3 is defined as h 3 The height of the cylinder head body 1 is defined as H, H 3 And H satisfies: h is 3 Not less than 0.4H. This embodiment guarantees that main oil return passage 3 has sufficient height, promotes main oil return passage 3 and to the drainage effect of machine oil, avoids to make the more smooth and easy downward flow of machine oil ability, promote oil return efficiency. It should be noted that in the present embodiment, the overall height of the main oil return passage 3 is the sum of the heights of the upper oil return passage 310, the middle oil return passage 320, the lower oil return passage 330, and the bottom oil return passage 340.
Considering oil return requirements under different vehicle types, different carrying arrangements and different operation conditions (especially, operation states of a vehicle climbing or descending for a long time), referring to fig. 1 and fig. 3, three main oil return passages 3 are provided, and the three main oil return passages 3 are sequentially defined as a first oil return passage 3a, a second oil return passage 3b and a third oil return passage 3c along a preset direction, wherein the preset direction is a direction departing from a timing end 1b of the cylinder head main body 1 along a cylinder head center line 1 a. At the same height position, the cross-sectional area of the first oil return passage 3a is defined as S 1 And a cross sectional area S of the second oil return passage 3b 2 And the cross-sectional area of the third oil return passage 3c is defined as S 3 ，S 1 、S 2 And S 3 Satisfies the following conditions: s 3 ≥S 1 ≥S 2 。
In the embodiment, in consideration of the situation that the engine cannot be kept in a horizontal state under different working conditions and then the gathering positions of the engine oil in the oil pool chamber 2 are different, by optimizing the cross sectional area of each main oil return passage, when the cross sectional area meets the above-mentioned limiting relationship, it can be effectively ensured that the engine oil in the oil pool chamber 2 can complete the oil return process of returning to the oil pool chamber at the bottom of the cylinder body through the third oil return passage 3c or the first oil return passage 3a under the working conditions that the vehicle ascends and descends for a long time and the like, and the interruption of the oil return process is avoided.
In order to further optimize the oil return performance under special working conditions, in the embodiment, the timing end 1b of the cylinder cover main body 1 is also formed with a timing cavity oil return passage 5, and S is the same time 1 、S 2 And S 3 Satisfies the following conditions: s. the 3 ≥S 1 +S 2 。
On the basis of the above-mentioned embodiment with three main oil return passages 3, referring to fig. 2, the top end of the timing cavity oil return passage 5 is communicated with the oil pool chamber 2, the bottom end is communicated with the corresponding oil return passage on the cylinder body, and the cross-sectional area of the timing cavity oil return passage 5 is defined as S 4 ，S 4 、S 1 、S 2 And S 3 Satisfies the following conditions: s 4 ＞S 1 +S 2 +S 3 . The timing cavity oil return passage 5 is additionally arranged in the oil tank chamber 2, so that the engine oil in the oil tank chamber can flow back to the oil tank chamber at the bottom of the cylinder body from at least one of the third oil return passage 3c, the first oil return passage 3a and the timing cavity oil return passage 5 under the working conditions of long-time uphill and downhill and the like, and the whole oil return process is completed.
The cylinder cover in the embodiment can improve the flowing speed of the engine oil and the backflow efficiency of the engine oil, and ensure that the engine oil can participate in the lubricating circulation process of the engine more under the condition that the engine is filled with limited engine oil; in addition, the oil drainage time can be greatly reduced, and the oil return capacity is improved by about 40% according to statistics of the oil drainage test time.
On the basis of the above embodiment with three main oil return channels 3, if the aforementioned situation with the bottom oil return channel 340 is considered, in this embodiment, in order to further optimize the function of the oil storage space, the cross-sectional area of the bottom oil return channel 340 in the first oil return channel 3a is defined as S 14 The cross-sectional area of the bottom oil return passage 340 in the second oil return passage 3b is defined as S 24 Bottom return in the third oil return passage 3cOil passage 340 has a cross-sectional area S 34 ，S 14 Greater than the corresponding maximum cross-sectional area (open top area), S, of the upper oil gallery 310 24 And S 34 The structure is the same, and the description is omitted.
Based on the same inventive concept, the embodiment of the application further provides an engine, which comprises the cylinder cover.
Compared with the prior art, the engine provided by the embodiment has the advantages that by adopting the cylinder cover, the integral structure compactness of the engine is ensured on the premise of keeping the oil return efficiency, the arrangement difficulty of the engine is favorably reduced, and the integral manufacturing cost of the engine can be reduced.
Based on the same inventive concept, the embodiment of the application further provides a vehicle comprising the engine.
Compared with the prior art, the vehicle provided by the embodiment can meet the oil return efficiency requirements of different engine arrangement scenes by adopting the engine and can also meet the engine platformization requirements.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (13)
1. A cylinder head, comprising:
the cylinder cover comprises a cylinder cover main body, wherein an oil pool chamber is formed on the upper side of the cylinder cover main body, and a plurality of main oil return channels which are communicated along the thickness direction of the cylinder cover main body are sequentially formed in the bottom of the oil pool chamber along the center line of the cylinder cover;
the main oil return channel is a channel gradually contracted from top to bottom, and comprises an upper oil return channel, a middle oil return channel and a lower oil return channel which are sequentially connected from top to bottom, wherein the upper oil return channel is a linear gradually-contracted channel, the middle oil return channel is an arc line gradually-contracted channel, and the lower oil return channel is a linear gradually-contracted channel;
the side wall of the middle oil return channel protrudes towards the direction of the center line of the middle oil return channel.
2. The cylinder head of claim 1, wherein a plane defining a centerline of each of said main oil return passages is a reference plane, said reference plane being parallel to a head center plane;
defining an included angle between two sidelines of the side wall of the upper oil return channel on the reference plane as alpha 1 And an included angle between two sidelines of the side wall of the lower oil return channel on the reference plane is alpha 2 And said alpha 1 And alpha 2 Satisfies the following conditions: alpha is not more than 1 degree 2 ≤ɑ 1 ≤45°。
3. The cylinder head according to claim 2, wherein a spacing between upper end points of two side lines of said side walls of said upper oil gallery on said reference plane is defined as d 1 Defining the distance between the lower end points of the two side lines of the side wall of the lower oil return channel on the reference plane as d 2 D is said 1 And d is 2 Satisfies the following conditions: d is not less than 3mm 2 ≤d 1 。
4. The cylinder head of claim 3, wherein d 1 And d is 2 Satisfies the following conditions: d is a radical of 1 ＝2d 2 。
5. The cylinder head of claim 3, wherein said upper gallery height is defined as h 1 Defining the sum of the heights of the middle oil return channel and the lower oil return channel as h 2 H is said 1 And h is said 2 Satisfies the following conditions: h is 1 ≥0.2h 2 ；
The cross section area of the upper oil return channel at any height is larger than the maximum cross section area of the lower oil return channel.
6. The cylinder head of claim 1, wherein said main oil return passage further includes a bottom oil return passage formed by expanding a lower port of said lower oil return passage outward in a direction away from a center line thereof, and said bottom oil return passage cooperates with an end surface of a corresponding oil return passage on the cylinder block to form a temporary oil storage space.
7. The cylinder head of claim 6, wherein said bottom gallery height is defined as h 4 Defining the height of the cylinder head main body as H, H 4 And H satisfies: h is not less than 2mm 4 ≤0.1H。
8. The cylinder head of claim 6, wherein said main oil return passage is defined in its entirety by a height h 3 Defining the height of the cylinder head main body as H, H 3 And H satisfies: h is 3 ≥0.4H。
9. The cylinder head of claim 1, wherein there are three of said main oil return passages, three of said main oil return passages being defined in sequence, in a predetermined direction, as a first oil return passage, a second oil return passage, and a third oil return passage, wherein said predetermined direction is a direction away from a timing end of said head body along said head centerline;
at the same height position, the cross-sectional area of the first oil return channel is defined as S 1 The cross-sectional area of the second oil return passage is defined as S 2 And the cross-sectional area of the third oil return passage is defined as S 3 Said S 1 The S 2 And said S 3 Satisfies the following conditions: s 3 ≥S 1 ≥S 2 。
10. The cylinder head of claim 9, wherein said timing end of said head body is further formed with a timing chamber oil return passage, said S 1 The S 2 And said S 3 Satisfies the following conditions: s 3 ≥S 1 +S 2 。
11. The cylinder head of claim 10, wherein a cross-sectional area defining said timing cavity oil return passage is S 4 Said S 4 The S 1 The S 2 And said S 3 Satisfies the following conditions: s 4 ＞S 1 +S 2 +S 3 。
12. An engine, characterized by comprising the cylinder head according to any one of claims 1 to 11.
13. A vehicle characterized by comprising an engine as claimed in claim 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210473385.8A CN115217666A (en) | 2022-04-29 | 2022-04-29 | Cylinder head, engine and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210473385.8A CN115217666A (en) | 2022-04-29 | 2022-04-29 | Cylinder head, engine and vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115217666A true CN115217666A (en) | 2022-10-21 |
Family
ID=83608559
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210473385.8A Pending CN115217666A (en) | 2022-04-29 | 2022-04-29 | Cylinder head, engine and vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115217666A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010223204A (en) * | 2009-02-25 | 2010-10-07 | Mitsubishi Motors Corp | Oil return passage structure of cylinder head having integrally formed collective exhaust port in multicylinder engine |
| CN204299714U (en) * | 2014-11-21 | 2015-04-29 | 上海通用汽车有限公司 | A kind of cylinder head oil return apparatus |
| JP2020139481A (en) * | 2019-02-28 | 2020-09-03 | ダイハツ工業株式会社 | Cylinder head of internal combustion engine |
| CN214366416U (en) * | 2021-03-02 | 2021-10-08 | 北京福田康明斯发动机有限公司 | Oil return hole on engine cylinder body |
-
2022
- 2022-04-29 CN CN202210473385.8A patent/CN115217666A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010223204A (en) * | 2009-02-25 | 2010-10-07 | Mitsubishi Motors Corp | Oil return passage structure of cylinder head having integrally formed collective exhaust port in multicylinder engine |
| CN204299714U (en) * | 2014-11-21 | 2015-04-29 | 上海通用汽车有限公司 | A kind of cylinder head oil return apparatus |
| JP2020139481A (en) * | 2019-02-28 | 2020-09-03 | ダイハツ工業株式会社 | Cylinder head of internal combustion engine |
| CN214366416U (en) * | 2021-03-02 | 2021-10-08 | 北京福田康明斯发动机有限公司 | Oil return hole on engine cylinder body |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1601063B (en) | Cooling air passway structure of cylinder cap | |
| JP4280925B2 (en) | Combustion chamber structure of internal combustion engine | |
| JP5073522B2 (en) | Piston of internal combustion engine | |
| CN115217666A (en) | Cylinder head, engine and vehicle | |
| CN107725208B (en) | Water-cooled engine for motorcycle | |
| CN101413459B (en) | High strength cylinder cap with double-layer water stream channel | |
| CN201902311U (en) | Double-layer exhaust valve plate for compressor | |
| CN211174372U (en) | Cylinder cover of inclined air inlet surface of diesel engine | |
| CN216642293U (en) | Oil return structure and cylinder cover and engine thereof | |
| CN102661210A (en) | Improved cylinder head cover of diesel engine | |
| KR102334311B1 (en) | head cover of tractor engine and mold for diecasting thereof | |
| JP2553073Y2 (en) | Piston refueling device | |
| CN114251185A (en) | Engine cylinder cover | |
| KR100980955B1 (en) | barrier structure of water jacket in engine | |
| CN208534637U (en) | A kind of six cylinder engine cylinder body | |
| CN113309627B (en) | Novel integral aluminum piston assembly for internal combustion engine | |
| CN221256896U (en) | Engine oil-gas separation structure of internal combustion engine | |
| CN114370350B (en) | Non-road diesel engine cylinder cover with double-side ventilation oil return channel | |
| CN2423417Y (en) | Body of horizontal double-cylinder diesel engine | |
| CN211174379U (en) | Crankcase shell assembly of motorcycle engine | |
| CN213331302U (en) | Optimized cylinder head of motorcycle with double overhead camshafts | |
| CN220705882U (en) | Crankcase cooling structure of vehicle air compressor | |
| CN221002890U (en) | Oil pan structure | |
| CN214247450U (en) | Engine oil pan structure and engine | |
| CN111963330B (en) | Low flow resistance air interchanger of diesel engine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |