CN218493691U

CN218493691U - Cylinder cover, engine and vehicle

Info

Publication number: CN218493691U
Application number: CN202222782882.4U
Authority: CN
Inventors: 牛放; 周洪阳; 邱周良; 吴世友
Original assignee: FAW Jiefang Automotive Co Ltd
Current assignee: FAW Jiefang Automotive Co Ltd
Priority date: 2022-10-21
Filing date: 2022-10-21
Publication date: 2023-02-17
Anticipated expiration: 2032-10-21

Abstract

The application provides a cylinder cap, engine and vehicle. The cylinder cap includes the cylinder cap main part, and the inside of cylinder cap main part is equipped with first intake duct and second intake duct, and first intake duct and second intake duct all have the gas outlet that is linked together with the inner chamber of cylinder. The first air inlet passage and the second air inlet passage each include a tangential passage extending toward the cylinder, and the extending direction of the two tangential passages is parallel to the axial direction of the cylinder. The two tangential channels extend along the axis of the cylinder, so that the two tangential channels only need a short length to be communicated with the cylinder, and the air flow does not generate excessive heat exchange with the air inlet channel during air inlet. Therefore, the air inlet channel cannot be overheated during air inlet, and the air inlet efficiency of the air inlet channel is high due to the short stroke of the tangential channel.

Description

Cylinder cover, engine and vehicle

Technical Field

The application relates to the technical field of engines, in particular to a cylinder cover, an engine and a vehicle.

Background

The air intake performance of the engine directly affects the combustion reaction in the cylinder, so that the air intake performance of the engine has great influence on the performance, emission and oil consumption of the engine, and therefore the air intake performance of the engine is very important. The air inlet passage of the engine is arranged in the cylinder cover, and the design of the air inlet passage determines the air inlet performance of the engine to a certain extent. The existing cylinder cover is generally provided with a spiral air inlet, but the spiral air inlet can enable heat transfer between the air inlet and air flow to be more, and the air inlet generates heat seriously.

SUMMERY OF THE UTILITY MODEL

Therefore, it is necessary to provide a cylinder head, an engine and a vehicle, aiming at the problem that the heat transfer between an air inlet and an air flow is more and the heat generation of the air inlet is serious due to a spiral air inlet arranged in the existing cylinder head.

According to a first aspect of the application, a cylinder cover is provided, the cylinder cover is installed on a cylinder, the cylinder cover comprises a cylinder cover main body, a first air inlet channel and a second air inlet channel are arranged inside the cylinder cover main body, and the first air inlet channel and the second air inlet channel are both provided with air outlets communicated with an inner cavity of the cylinder;

the first air inlet channel with the second air inlet channel all includes and is used for the orientation the tangential passageway that the cylinder extends, two the extending direction of tangential passageway is on a parallel with the axis direction of cylinder.

In one embodiment, the cylinder head main body is further provided with an air inlet which is communicated with the first air inlet channel and the second air inlet channel respectively.

In one embodiment, the outer surface area of the cylinder head main body is a, and the sum of the volumes of the first inlet passage and the second inlet passage is b; wherein, 0.125 a/b is more than or equal to 0.09.

In one embodiment, two of the tangential channels are tapered in a direction from the head body to the cylinder.

In one embodiment, the side wall of the first air inlet channel close to the air outlet of the first air inlet channel extends obliquely outwards along the radial direction of the first air inlet channel;

and the side wall of the second air inlet channel, which is close to the air outlet of the second air inlet channel, extends along the radial direction of the second air inlet channel in an outwards inclined mode.

In one embodiment, the side walls of the first and second inlet channels near the respective outlets each include a first portion near the center of the cylinder and a second portion away from the center of the cylinder;

the first portion has an angle of deflection c relative to the axis of the cylinder; the second portion has an angle of deflection d relative to the axis of the cylinder, where c > d.

In one embodiment, 30 ° ≧ d ≧ 10 °,60 ° ≧ c ≧ 40 °.

In one embodiment, a fuel injector mounting cavity and a spark plug mounting cavity are further arranged in the cylinder cover main body;

still be provided with the cooling water course that is used for holding the coolant liquid in the cylinder cap main part, the cooling water course is located first intake duct reaches in the lateral wall of second intake duct, just the cooling water course respectively with the sprayer installation cavity reaches spark plug installation cavity intercommunication.

According to a second aspect of the application, an engine is provided, the engine comprises the cylinder cover, the cylinder cover is installed on a cylinder, the cylinder cover comprises a cylinder cover main body, a first air inlet channel and a second air inlet channel are arranged inside the cylinder cover main body, and the first air inlet channel and the second air inlet channel are provided with air outlets communicated with an inner cavity of the cylinder;

According to a third aspect of the present application, a vehicle is presented comprising an engine as described above. The engine comprises a cylinder cover, wherein the cylinder cover is arranged on a cylinder, the cylinder cover comprises a cylinder cover main body, a first air inlet channel and a second air inlet channel are arranged in the cylinder cover main body, and the first air inlet channel and the second air inlet channel are respectively provided with an air outlet communicated with an inner cavity of the cylinder;

According to the technical scheme of this application, it all includes the tangential passageway with the second intake duct to be provided with first intake duct in the cylinder cap main part, and the tangential passageway extends towards the cylinder along the axis direction of cylinder to communicate with the cylinder. The two tangential channels extend along the axis of the cylinder, so that the two tangential channels only need a short length to be communicated with the cylinder, and the air flow can not be subjected to excessive heat exchange with the air inlet channel during air inlet. Therefore, the air inlet channel cannot be overheated during air inlet, and the air inlet efficiency of the air inlet channel is high due to the short stroke of the tangential channel.

Drawings

Fig. 1 is a schematic structural view of an embodiment of a cylinder head according to the present application;

fig. 2 isbase:Sub>A schematic cross-sectional view atbase:Sub>A-base:Sub>A in fig. 1.

The reference numbers illustrate:

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and that modifications may be made by one skilled in the art without departing from the spirit and scope of the application and it is therefore not intended to be limited to the specific embodiments disclosed below.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless explicitly specified otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and encompass, for example, both fixed and removable connections or integral parts thereof; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be interconnected within two elements or in a relationship where two elements interact with each other unless otherwise specifically limited. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature "under," "beneath," and "under" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

The researcher of the application discovers according to research that the engine cylinder cover is provided with the helical air inlet channel to cause the air inlet channel to be overheated. This is because the helical inlet increases the contact area and contact time of the air flow with the inner wall of the inlet, resulting in a faster rate of temperature rise of the inlet. Furthermore, the helical intake duct has a certain overlap on the axis of the cylinder, which may cause difficulty in heat dissipation of the intake duct, making it difficult for the temperature of the intake duct to drop. Therefore, researchers of the application design a cylinder cover which is not provided with a spiral air inlet channel, and solve the problem that the temperature of the air inlet channel of the cylinder cover is too high.

In view of this, the application provides a cylinder cap, aims at solving the spiral intake duct that sets up in current cylinder cap and can make the heat transfer between intake duct and the air current more, leads to the intake duct to generate heat serious problem. Fig. 1 to fig. 2 are schematic structural views of an embodiment of the cylinder head provided in the present application.

Referring to fig. 1 and fig. 2, the cylinder head 100 provided by the present application is installed on a cylinder, and the cylinder head 100 includes a cylinder head main body 1, a first air inlet 11 and a second air inlet 12 are disposed inside the cylinder head main body 1, and both the first air inlet 11 and the second air inlet 12 have air outlets for communicating with an inner cavity of the cylinder. Both the first intake passage 11 and the second intake passage 12 include tangential passages to extend toward the cylinders, and the extending directions of both the tangential passages are parallel to the axial direction of the cylinders.

According to the technical scheme of this application, it all includes the tangential passageway all to be provided with first intake duct 11 and second intake duct 12 in the cylinder cap main part 1, and the tangential passageway extends towards the cylinder along the axis direction of cylinder to communicate with the cylinder. The two tangential channels extend along the axis of the cylinder, so that the two tangential channels only need a short length to be communicated with the cylinder, and the air flow can not be subjected to excessive heat exchange with the air inlet channel during air inlet. Therefore, the air inlet channel can not be overheated during air inlet, and the air inlet efficiency of the air inlet channel is higher due to the short stroke of the tangential channel.

In some embodiments, the cylinder head main body 1 is further provided with an intake port 13, and the intake port 13 is communicated with the first intake passage 11 and the second intake passage 12, respectively. In the present embodiment, the first intake duct 11 and the second intake duct 12 share the same intake port 13, and the intake port 13 communicates with the first intake duct 11 and the second intake duct 12, respectively. Compared with the situation that the first air inlet channel 11 and the second air inlet channel 12 are respectively provided with the independent air inlet 13, the first air inlet channel 11 and the second air inlet channel 12 share one air inlet 13, so that sealing is simpler, the loss of the air inlet pressure is smaller, the air inlet charge coefficient is higher, and the performance of the engine is improved.

In some embodiments, the outer surface area of the head main body 1 is a, and the sum of the volumes of the first intake passage 11 and the second intake passage 12 is b. Wherein, 0.125 a/b is more than or equal to 0.09.

The ratio of the outer surface area of the cylinder head body 1 to the sum of the volumes of the first intake passage 11 and the second intake passage 12 should not be excessively large, otherwise the loss of the intake pressure is large, and the difficulty of sealing also increases. Therefore, in the present embodiment, the ratio of the outer surface area of the cylinder head main body 1 to the sum of the volumes of the first intake passage 11 and the second intake passage 12 is less than or equal to 0.125, so as to ensure the intake pressure of the intake passages and reduce the difficulty of sealing. In addition, the ratio of the outer surface area of the cylinder head main body 1 to the sum of the volumes of the first intake passage 11 and the second intake passage 12 is not too small, otherwise the side walls of the first intake passage 11 and the second intake passage 12 are made thinner, and the strength of the first intake passage 11 and the second intake passage 12 is affected. Therefore, in the present embodiment, the ratio of the outer surface area of the cylinder head main body 1 to the sum of the volumes of the first intake passage 11 and the second intake passage 12 is equal to or greater than 0.09, thereby ensuring the strength of the first intake passage 11 and the second intake passage 12.

In some embodiments, the two tangential channels are tapered in the direction from the head body 1 to the cylinder.

When the engine is intake, the pressure applied to the portions of the first intake passage 11 and the second intake passage 12 closer to the cylinder is higher, and the strength of the first intake passage 11 and the second intake passage 12 is required to be higher. Consequently in this embodiment, two tangential passageways are the convergent setting along the direction from cylinder cap main part 1 to cylinder, so make the lateral wall of two tangential passageways bodiness gradually to make the intensity of two tangential passageways crescent, thereby make two tangential passageways guarantee the intensity of self under the prerequisite that improves the efficiency of admitting air, satisfied the user demand.

In some embodiments, the sidewall of the first air inlet 11 near the outlet thereof extends obliquely outward in the radial direction of the first air inlet 11. The side wall of the second inlet duct 12 near the outlet thereof extends obliquely outward in the radial direction of the second inlet duct 12. In this embodiment, the side walls of the first air inlet channel 11 and the second air inlet channel 12 close to the respective air outlets all extend along the radial direction of the cylinder in an outward inclined manner, so that the first air inlet channel 11 and the second air inlet channel 12 both form an outward expansion structure at the air outlets, thereby guiding the air flow and increasing the air inlet efficiency.

In some embodiments, the side walls of the first inlet duct 11 and the second inlet duct 12 near the respective outlets each include a first portion 2 near the center of the cylinder and a second portion 3 away from the center of the cylinder. The first portion 2 is inclined at an angle c to the axis of the cylinder and the second portion 3 is inclined at an angle d to the axis of the cylinder, where c > d.

The side walls of the first air inlet channel 11 and the second air inlet channel 12 close to the respective air outlets all extend along the radial direction of the cylinder in an outwards inclined mode, so that the first air inlet channel 11 and the second air inlet channel 12 can form an outward expansion structure at the air outlets, and the air inlet efficiency is improved. However, in practical applications of the cylinder head 100, the outlet of the cylinder head 100 is not angled outward as much as possible. In this case, the outward expansion angle of the portion of the air outlet of the cylinder cover 100 close to the cylinder wall of the cylinder cannot be too large, that is, the inclination angle of the second portion 3 relative to the axis of the cylinder cannot be too large, otherwise, part of the side walls of the air outlets of the first air inlet passage 11 and the second air inlet passage 12 may extend above the side walls of the cylinder, so as to form an air inlet dead zone on the side walls of the cylinder. In practical application, the airflow is likely to be sluggish in the dead zone, and the air intake efficiency is affected.

As described above, the angle of inclination of the second portion 3 with respect to the axis of the cylinder should be small. The first portion 2 is a portion of the side walls of the first air inlet channel 11 and the second air inlet channel 12 close to the respective air outlets, which is close to the center of the cylinder, so that the deflection angle of the first portion 2 relative to the axis of the cylinder can be set to be larger, thereby ensuring the flow guiding effect of the first air inlet channel 11 and the second air inlet channel 12. Therefore, in the present embodiment, the angle of inclination of the first portion 2 with respect to the axis of the cylinder is greater than the angle of inclination of the second portion 3 with respect to the axis of the cylinder, so that the first intake passage 11 and the second intake passage 12 can increase the intake efficiency while reducing the occurrence of the intake dead zone.

In some embodiments, 30 ° ≧ d ≧ 10 °,60 ° ≧ c ≧ 40 °. In a specific application, the larger the deflection angle of the first portion 2 is, the better the deflection angle is, and when the deflection angle of the first portion 2 is too large, the side walls of the first air inlet duct 11 and the second air inlet duct 12 at the air outlet may be made thinner, resulting in lower strength. Therefore, the angle of deflection of the first portion 2 cannot be too large either. In this embodiment, the inclination angle of the first portion 2 relative to the axis of the cylinder is greater than or equal to 40 ° and less than or equal to 60 °, so as to improve the air intake efficiency of the first air intake duct 11 and the second air intake duct 12 on the premise of ensuring the strength of the first air intake duct 11 and the second air intake duct 12 at the air outlet.

Furthermore, the angle of inclination of the second section 3 with respect to the cylinder axis cannot be too small, which would otherwise result in poor flow guidance of the first inlet duct 11 and the second inlet duct 12 in the second section 3. Therefore, in this embodiment, the inclination angle of the second portion 3 with respect to the axis of the cylinder is greater than or equal to 10 ° and less than or equal to 30 °, so as to improve the intake efficiency of the first intake duct 11 and the second intake duct 12 on the premise of avoiding the first intake duct 11 and the second intake duct 12 from generating an intake dead zone in the second portion 3.

In some embodiments, a fuel injector installation cavity and a spark plug installation cavity are further arranged in the cylinder head main body 1. The cylinder cover main body 1 is further internally provided with a cooling water channel for containing cooling liquid, the cooling water channel is arranged in the side walls of the first air inlet channel 11 and the second air inlet channel 12, and the cooling water channel is respectively communicated with the fuel injector installation cavity and the spark plug installation cavity.

When the engine is in practical use, what the intake stroke was inhaled is not only the air, often also the vehicle itself high temperature air current that produces everywhere, and this can lead to the temperature of first intake duct 11 and second intake duct 12 to rise very fast, consequently in this embodiment, still be provided with the cooling water course in the cylinder cap main part 1, hold the coolant liquid in the cooling water course. The cooling water channel is respectively communicated with the oil injector installation cavity and the spark plug installation cavity, so that heat is dissipated for the oil injector and the spark plug which are two elements with higher temperature. In addition, the cooling water channel is also arranged in the side walls of the first air inlet channel 11 and the second air inlet channel 12, so that heat can be dissipated for the first air inlet channel 11 and the second air inlet channel 12.

The present application also contemplates an engine including a cylinder head 100 as described in any of the above embodiments. Any engine including the cylinder head 100 is included in the present invention. Of course, head 100 could also be used in a compressor or other mechanical device, and not just one way of using an engine.

The application also proposes a vehicle comprising an engine as described above. Any vehicle including the engine is included in the present application.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A cylinder cover is arranged on a cylinder and is characterized by comprising a cylinder cover main body, wherein a first air inlet channel and a second air inlet channel are arranged in the cylinder cover main body, and the first air inlet channel and the second air inlet channel are respectively provided with an air outlet communicated with an inner cavity of the cylinder;

the first air inlet passage with the second air inlet passage all includes and is used for the orientation the tangential passageway that the cylinder extends, two the extending direction of tangential passageway is on a parallel with the axis direction of cylinder.

2. The cylinder head of claim 1, wherein the cylinder head body is further provided with an intake port, and the intake port is respectively communicated with the first intake passage and the second intake passage.

3. The cylinder head of claim 1, wherein an outer surface area of the cylinder head body is a, and a sum of volumes of the first intake port and the second intake port is b; wherein, 0.125 a/b is more than or equal to 0.09.

4. The cylinder head of claim 1, wherein the two tangential passages are tapered in a direction from the head body to the cylinder.

5. The cylinder head of claim 1, wherein a sidewall of the first intake port adjacent the outlet port thereof extends obliquely outward in a radial direction of the first intake port;

the side wall of the second air inlet channel close to the air outlet of the second air inlet channel extends along the radial direction of the second air inlet channel in an outwards inclined mode.

6. The cylinder head of claim 5, wherein the side walls of the first and second intake passages proximate the respective air outlets each include a first portion proximate the center of the cylinder and a second portion distal from the center of the cylinder;

the first portion has an angle of deflection c relative to the axis of the cylinder; the second portion has an angle of inclination with respect to the axis of the cylinder of d, where c > d.

7. The cylinder head of claim 6, wherein 30 ° ≧ d ≧ 10 °,60 ° ≧ c ≧ 40 °.

8. The cylinder head of claim 1, wherein a fuel injector mounting cavity and a spark plug mounting cavity are further arranged in the cylinder head main body;

9. An engine characterized by comprising a cylinder head according to any one of claims 1 to 8.

10. A vehicle characterized by comprising the engine of claim 9.