CN218030381U

CN218030381U - Cylinder head and engine

Info

Publication number: CN218030381U
Application number: CN202222528575.3U
Authority: CN
Inventors: 宋利坤; 郭志杰; 方天文; 张思超; 王超; 赵福成; 王瑞平
Original assignee: Zhejiang Geely Holding Group Co Ltd; Ningbo Geely Royal Engine Components Co Ltd; Yiwu Geely Powertrain Co Ltd; Aurobay Technology Co Ltd
Current assignee: Zhejiang Geely Holding Group Co Ltd; Ningbo Geely Royal Engine Components Co Ltd; Yiwu Geely Powertrain Co Ltd; Aurobay Technology Co Ltd
Priority date: 2022-09-23
Filing date: 2022-09-23
Publication date: 2022-12-13
Anticipated expiration: 2032-09-23

Abstract

The application provides a cylinder head and engine, cylinder head include exhaust structure, exhaust structure includes a plurality of cylinder exhaust passage along first direction range, and each cylinder exhaust passage includes first sub exhaust passage and second sub exhaust passage, first sub exhaust passage converges into first exhaust passage, second sub exhaust passage converges into second exhaust passage. When the cylinder exhausts, the exhaust gas is independently exhausted through the first exhaust channel and the second exhaust channel, so that the exhaust gas residue in the cylinder is reduced, the temperature in the cylinder is reduced, the heat loss in the cylinder is reduced, and the heat efficiency of the engine is improved.

Description

Cylinder head and engine

Technical Field

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

Background

With the increasingly stricter fuel consumption and emission regulations and the popularization of hybrid technologies, more and more host plants develop special hybrid gasoline engines to achieve lower fuel consumption, lower emission and better drivability. In order to fully utilize the heat energy of the gasoline engine and improve energy conversion, the gasoline engine with higher heat efficiency is required to support, and particularly the gasoline engine with high heat efficiency puts higher requirements on the overall structure design and the detailed design of the exhaust passage.

At present, each cylinder of a conventional exhaust structure of a gasoline engine independently corresponds to an exhaust channel for exhaust, exhaust gas in each exhaust channel is combined together outside a cylinder cover through an exhaust pipe, residual gas in the cylinder is relatively more, the temperature in the cylinder is relatively higher, and excessive heat loss is caused in the exhaust process of the exhaust gas and at the exhaust valve, so that the thermal efficiency of the gasoline engine is low.

Therefore, a cylinder head of an engine and an engine are needed to solve the above technical problems.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems, the application provides the cylinder cover and the engine, which can reduce the heat loss of the engine and improve the heat efficiency of the engine.

The application provides a cylinder head, including exhaust structure, exhaust structure includes a plurality of cylinder exhaust passage along first direction range, and each cylinder exhaust passage includes first sub exhaust passage and second sub exhaust passage, first sub exhaust passage converges into first exhaust passage, second sub exhaust passage converges into second exhaust passage.

Furthermore, the first sub exhaust passage of each cylinder exhaust passage is positioned above the second sub exhaust passage and is alternately staggered along the first direction.

Further, the first exhaust passage and the second exhaust passage are arranged near the middle of the exhaust structure, the first exhaust passage has a first exhaust outlet, and the second exhaust passage has a second exhaust outlet.

Further, the exhaust structure comprises four cylinder exhaust passages, and the area of the first exhaust outlet and the area of the second exhaust outlet are 420mm ² ～750mm ² The first exhaust outlet and the second exhaust outlet have the same area.

Furthermore, the first sub-exhaust passage and the second sub-exhaust passage respectively comprise an exhaust passage throat and a junction part, the exhaust passage throat is connected with the cylinder, the junction part is connected with the first exhaust passage or the second exhaust passage, and the area ratio of the exhaust passage throat to the first exhaust outlet and the second exhaust outlet is 1.1-1.9.

Furthermore, the first sub-exhaust passages of all the cylinder exhaust passages are located on the same side of the second sub-exhaust passage, and the throat openings of all the exhaust passages are identical in height and are arranged in a row.

The application also provides an engine comprising the cylinder head.

Further, the first exhaust passage communicates directly with a catalyst of the engine, and the second exhaust passage communicates with both a turbocharger and a one-way bypass valve of the engine.

Further, the turbocharger and the one-way bypass valve are communicated with the catalyst, the catalyst is communicated with an intercooler and the atmosphere, and the intercooler is communicated with the turbocharger.

Further, the gas volume proportion discharged from the first exhaust passage is 22%, the gas volume proportion discharged from the second exhaust passage is 78%, and the gas volumes discharged from the first exhaust passage and the second exhaust passage are controlled by the exhaust valve lift.

The utility model provides a cylinder head, each cylinder exhaust passage include first sub-exhaust passage and second sub-exhaust passage, and first sub-exhaust passage and the second sub-exhaust passage of same cylinder exhaust passage converge respectively into first exhaust passage and second exhaust passage for the waste gas that produces in the engine combustion process is discharged through two independent exhaust passages, can reduce the cylinder internal waste gas remaining, and then makes the temperature reduction in the cylinder, reduces the in-cylinder thermal loss.

Drawings

Fig. 1 is a perspective view of an exhaust structure of a cylinder head of an engine according to the present invention;

FIG. 2 is a side view of the venting structure of FIG. 1;

fig. 3 is a schematic diagram of the overall exhaust path associated with the exhaust structure of the present invention.

The reference numbers indicate: 100. an exhaust structure; 10. an air exhaust channel of the air cylinder; 11. a first cylinder exhaust passage; 12. a second cylinder exhaust passage; 13. a third cylinder exhaust passage; 14. a fourth cylinder exhaust passage; 111. a first sub-exhaust passage; 112. a second sub-exhaust passage; 113. an exhaust passage throat; 114. a merging section; 15. a first exhaust passage; 151. a first exhaust outlet; 16. a second exhaust passage; 161. a second exhaust outlet; 200. a cylinder; 21. a catalyst; 22. a turbocharger; 23. a one-way bypass valve; 24. and an intercooler.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present specification. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the specification, as detailed in the claims that follow.

The terminology used in the description herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the description. As used in this specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

It should be understood that although the terms first, second, third, etc. may be used herein to describe various information, these information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present description. The word "if," as used herein, may be interpreted as "at … …" or "at … …" or "in response to a determination," depending on the context.

The embodiment provides a cylinder cover of an engine, which is used in the engine of a gasoline engine to avoid exhaust gas in a plurality of cylinders of the engine from being intensively exhausted from one exhaust outlet, thereby reducing heat loss in the cylinders of the engine and improving the thermal efficiency of the engine.

As shown in fig. 1, in the engine and the cylinder head thereof provided in the present embodiment, an exhaust structure 100 is provided on the cylinder head, one end of the exhaust structure 100 is connected to an exhaust end of a cylinder 200 of the engine, and the other end of the exhaust structure 100 is communicated with an exhaust gas treatment device or a recycling device.

The exhaust structure 100 includes a plurality of cylinder exhaust passages 10 arranged in a first direction. In the present embodiment, the exhaust structure 100 includes four cylinder exhaust passages 10, namely, a one-cylinder exhaust passage 11, a two-cylinder exhaust passage 12, a three-cylinder exhaust passage 13, and a four-cylinder exhaust passage 14, and each cylinder exhaust passage 10 is connected to a combustion chamber. The first direction is the arrangement direction of the cylinders 200.

Each cylinder exhaust passage 10 includes a first sub-exhaust passage 111 and a second sub-exhaust passage 112. The first sub-exhaust passages 111 of the same cylinder exhaust passage 10 are all positioned on the same side of the second sub-exhaust passage 112, and the first sub-exhaust passage 111 is positioned above the second sub-exhaust passage 112. The four first sub-exhaust passages 111 of the one-cylinder exhaust passage 11, the two-cylinder exhaust passage 12, the three-cylinder exhaust passage 13 and the four-cylinder exhaust passage 14 are merged into the first exhaust passage 15. The four second sub-exhaust passages 112 of the one-cylinder exhaust passage 11, the two-cylinder exhaust passage 12, the three-cylinder exhaust passage 13, and the four-cylinder exhaust passage 14 are merged into the second exhaust passage 16. The first exhaust passage 15 and the second exhaust passage 16 are provided near the middle of the entire exhaust structure 100.

Each of the first sub-exhaust passage 111 and the second sub-exhaust passage 112 includes an exhaust passage throat 113 connected to the cylinder and a junction 114 connected to the first exhaust passage 15 or the second exhaust passage 16, and the junction 114 is formed by the intersection of the first sub-exhaust passage 111 and the second sub-exhaust passage 112. For better exhaust, the height of the junction 114 remains the same, and in this embodiment, the diameter φ of the exhaust passage throat 113 is 22mm.

As shown in fig. 1 and 2, the first exhaust passage 15 and the second exhaust passage 16 of the exhaust structure 100 provided in the present embodiment are arranged to be staggered in the first direction, and the first exhaust vent passage 15 is located above the second exhaust passage 16. When the waste gas is discharged, the interference among the exhaust pressure waves of each cylinder is reduced, and the exhaust back pressure is reduced.

The first exhaust passage 15 has a first exhaust outlet 151 and the second exhaust passage 16 has a second exhaust outlet 161. The areas of the first exhaust outlet 151 and the second exhaust outlet 161 are equal and are both 420mm ² ～750mm ² . The area ratio of the exhaust passageway throat 113 to the first exhaust outlet 151 and the second exhaust outlet 161 is 1.1 to 1.9.

In the embodiment, the lift of the exhaust valve of the engine controls the volume ratio of the exhaust gas discharged from the first sub exhaust passage 111 and the second sub exhaust passage 112, and further controls the volume ratio of the exhaust gas discharged from the first exhaust passage 15 and the second exhaust passage 16. In the present embodiment, the gas volume proportion discharged from the first exhaust passage 15 is 22%, and the gas volume proportion discharged from the second exhaust passage 16 is 78%.

As shown in fig. 3, the first exhaust passage 15 directly communicates with a catalyst 21 of the engine, and the second exhaust passage 16 simultaneously communicates with a turbocharger 22 and a one-way bypass valve 23 of the engine. The catalyst 21 communicates with an intercooler 24 and the atmosphere, and the intercooler 24 communicates with the turbocharger 22.

The exhaust gas from the first exhaust passage 15 enters the catalyst 21, the treated gas passes through the intercooler 24 of the engine to reach the turbocharger 22 for compression, and the compressed gas enters the cylinder 200 for recycling.

The exhaust gas discharged through the second exhaust passage 16 is partially led to a turbine of the turbocharger 22, pushes the turbine to do work, and then enters the catalyst 21; the other part of the exhaust gas reaches the catalyst 21 through the one-way bypass valve 23, the gas treated by the catalyst 21 reaches the turbocharger 22 through the intercooler 24 for compression, and then enters the cylinder 200 for cyclic utilization, and the exhaust gas utilization rate of the engine during high-load operation is effectively improved through the exhaust system.

The cylinder exhaust passage comprises two sub exhaust passages, wherein a first sub exhaust passage 111 converges a first exhaust passage 15, a second sub exhaust passage 112 converges a second exhaust passage 16, the exhaust ratio of the exhaust amount of the two sub exhaust passages of each cylinder 200 is controlled, the exhaust ratio of the first exhaust passage 15 and the second exhaust passage 16 can be controlled, the exhaust amount of different exhaust paths can be effectively distributed, the heat of the exhaust gas is fully utilized, and the heat efficiency of an engine is effectively improved to more than 45%.

Although the present application has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the application, and all changes, substitutions and alterations that fall within the spirit and scope of the application are to be understood as being included within the following description of the preferred embodiment.

Claims

1. A cylinder cover comprises an exhaust structure, and is characterized in that the exhaust structure comprises a plurality of cylinder exhaust passages which are arranged along a first direction, each cylinder exhaust passage comprises a first sub exhaust passage and a second sub exhaust passage, the first sub exhaust passages are combined into a first exhaust passage, and the second sub exhaust passages are combined into a second exhaust passage.

2. The cylinder head of claim 1, wherein the first sub-exhaust passages of each cylinder exhaust passage are located above the second sub-exhaust passages and are alternately staggered in a first direction.

3. The cylinder head of claim 2, wherein the first exhaust passage and the second exhaust passage are disposed near a middle of the exhaust structure, the first exhaust passage having a first exhaust outlet and the second exhaust passage having a second exhaust outlet.

4. The cylinder head of claim 3, wherein the first and second exhaust outlets have an area of 420mm ² ～750mm ² The first exhaust outlet and the second exhaust outlet have the same area.

5. The cylinder head of claim 4, wherein each of the first sub-stack and the second sub-stack includes a stack throat connected to the cylinder and a junction connected to the first exhaust passage or the second exhaust passage, and wherein an area ratio of the stack throat to the first exhaust outlet and the second exhaust outlet is 1.1 to 1.9.

6. The cylinder head of claim 5, wherein the first sub-stack of each cylinder stack is located on the same side as the corresponding second sub-stack, and all of the stack throats are at the same height and are aligned in a row.

7. An engine, characterized by comprising a cylinder head according to any one of claims 1 to 6.

8. The engine of claim 7, wherein the first exhaust passage communicates directly with a catalyst of the engine and the second exhaust passage communicates with both a turbocharger and a one-way bypass valve of the engine.

9. The engine of claim 8, wherein the turbocharger and the one-way bypass valve are in communication with the catalyst, the catalyst is in communication with an intercooler and the atmosphere, and the intercooler is in communication with the turbocharger.

10. The engine of claim 7, wherein the first exhaust passage exhausts a gas volume fraction of 22% and the second exhaust passage exhausts a gas volume fraction of 78%, and the first and second exhaust passages exhaust gas volumes are controlled by exhaust valve lift.