CN220302222U - Cylinder head and cylinder head assembly - Google Patents

Abstract

The utility model provides a cylinder cover and a cylinder head assembly, the cylinder cover comprises a cylinder cover body, and a side wall and a bottom wall which are arranged in the cylinder cover body, wherein an oil-gas separation cavity is formed by surrounding the cylinder cover body, the side wall and the bottom wall, an oil-gas inlet and an oil-gas outlet which are communicated with the oil-gas separation cavity are arranged on the side wall, an air outlet which is communicated with the oil-gas separation cavity is arranged on the cylinder cover body, an oil-gas separation channel which is communicated between the oil-gas inlet and the air outlet is arranged in the oil-gas separation cavity, an oil storage tank for receiving oil separated in the oil-gas separation channel is formed on the bottom wall, the oil-gas separation cavity is communicated with the oil outlet through the oil storage tank, and the oil in the oil storage tank can isolate the oil-gas separation cavity from the oil outlet when the oil reaches a preset depth threshold value. The cylinder cover can effectively prevent gas from flowing back to the oil-gas inlet through the oil outlet through the oil-gas separation cavity and the oil storage tank, and is beneficial to improving the oil-gas separation efficiency, so that the cylinder cover has a good use effect.

Description

Cylinder head and cylinder head assembly

Technical Field

The utility model relates to the technical field of engines, in particular to a cylinder cover. Meanwhile, the utility model also relates to a cylinder cover assembly provided with the cylinder cover.

Background

In compression, work and exhaust links of a four-stroke internal combustion engine, exhaust gas in a combustion chamber often flows into a crankcase through a gap between a piston ring and a piston ring groove of the engine and a gap between a piston and a cylinder barrel. The engine splash lubricated moving parts produce oil droplets and oil mist during operation, and the combustion chamber blow-by gas is mixed with the oil mist to form crankcase exhaust.

The engine is typically designed with a crankcase ventilation system for the circulation of crankcase exhaust gases, which separates engine oil from other components in the exhaust gases, the separated engine oil being recirculated back to the engine, other gases being introduced into the intake system via the crankcase ventilation line and eventually entering the combustion chamber for re-participation in combustion. The crankcase ventilation system can not only efficiently separate engine oil particles in the exhaust gas, but also quickly and smoothly return the separated engine oil to the engine lubrication system, so that an efficient oil-gas separation structure is required to be designed in the crankcase ventilation system.

For a horizontally opposed engine, the separator needs to be vertically arranged on the engine due to the limitation of surrounding space, and the currently widely used vertically arranged oil-gas separator is mostly an externally hung cyclone oil-gas separator. The cyclone separator has poor separation effect when the air blow-by is low, and has poor oil-gas separation effect due to too high pressure loss under high air blow-by. In addition, for the oil-gas separator which is horizontally arranged and is used for vertical arrangement, the separation structure and the oil return structure of the oil-gas separator can not meet the separation and oil return requirements, so that a brand new separation structure and oil return structure are urgently needed to be designed, and the oil-gas separation efficiency requirement of an engine is met.

Disclosure of Invention

In view of the above, the present utility model aims to provide a cylinder head capable of improving oil-gas separation efficiency while preventing backflow of gas to an oil-gas inlet through an oil outlet.

In order to achieve the above purpose, the technical scheme of the utility model is realized as follows:

a cylinder head comprising a head body, and side walls and a bottom wall disposed within the head body;

the cylinder cover body, the side wall and the bottom wall are formed into an oil-gas separation cavity in a surrounding mode, an oil-gas inlet and an oil-gas outlet which are communicated with the oil-gas separation cavity are formed in the side wall, and an air outlet which is communicated with the oil-gas separation cavity is formed in the cylinder cover body;

the oil-gas separation cavity is internally provided with an oil-gas separation channel communicated between the oil-gas inlet and the air outlet, an oil storage tank for receiving oil liquid separated in the oil-gas separation channel is formed on the bottom wall, the oil-gas separation cavity is communicated with the oil outlet through the oil storage tank, and when the oil liquid in the oil storage tank reaches a preset depth threshold value, the oil-gas separation cavity and the oil outlet can be isolated.

Furthermore, a partition plate is arranged in the oil storage tank, the oil storage tank is divided into two oil storage sub-tanks by the partition plate, and one of the oil storage sub-tanks is communicated with the oil outlet.

Further, the bottom wall is a plurality of, and part of the bottom wall is provided with two longitudinal plates which are arranged at intervals, and a transverse plate which is connected to the lower parts of the two longitudinal plates;

the oil storage tank is formed by enclosing two longitudinal plates and two transverse plates of one bottom wall, and the cross section of the oil storage tank is U-shaped.

Further, the oil storage tanks are multiple, and the oil storage tanks are respectively positioned at the middle lower parts of the adjacent ignition coil holes of the cylinder cover body.

Further, one of the longitudinal plates of each oil storage tank extends upwards from between adjacent ignition coil holes of the cylinder cover body to the upper part of the oil-gas separation cavity; or one longitudinal plate of each oil storage tank upwards bypasses the adjacent ignition coil hole and is in smooth transition connection with the partition plate in the adjacent oil storage tank.

Further, from the oil gas inlet to the gas outlet, the oil gas separation channel is in a wave shape.

Further, a plurality of upper partition plates and lower partition plates are arranged in the oil-gas separation cavity, the upper partition plates and the lower partition plates are alternately distributed between the oil-gas inlet and the air outlet at intervals, and the upper partition plates and the lower partition plates which are adjacent are vertically staggered to form wavy oil-gas separation channels.

Further, each lower partition plate is arranged on the bottom wall, and part of the lower partition plates are provided with oil liquid channels, and the oil liquid channels are used for enabling oil liquid received by the bottom wall to flow to the oil storage tank.

Further, a one-way valve is arranged at the oil outlet and used for enabling the oil in the oil storage tank to flow out of the oil outlet in a one-way mode.

Compared with the prior art, the utility model has the following advantages:

according to the cylinder cover, through the oil-gas separation cavity and the oil storage tank, when the oil in the oil storage tank reaches the preset depth threshold, the oil-gas separation cavity and the oil outlet can be isolated, gas can be effectively prevented from flowing back to the oil-gas inlet through the oil outlet, the oil-gas separation efficiency is improved, and the cylinder cover has a good use effect.

In addition, the division board that sets up in the oil storage tank can make the oil storage tank separate into two oil storage branch grooves, sets up the oil-out and one of them oil storage groove intercommunication, is favorable to getting into the fluid in the oil storage tank and passes through the oil storage groove in proper order to discharge from oil-out department, and the setting of division board is favorable to fluid inflow oil storage tank, and when reaching certain degree of depth fluid in the oil storage tank, also is favorable to realizing the isolation of oil-gas separation chamber and oil-out. The oil storage tank is enclosed by two longitudinal plates and a transverse plate and forms a U shape, and has the characteristics of simple structure and convenient design and implementation. The oil storage tanks are arranged in a plurality of ways and are respectively positioned at the middle lower parts of the adjacent ignition coil holes of the cylinder cover body, so that the collection of oil separated by the oil-gas separation cavity is facilitated, and the limited space around the ignition coil can be fully utilized, so that the structure is more compact.

In addition, the arrangement of the longitudinal plates is beneficial to the preparation of the oil-gas separation cavity. The oil-gas separation channel is wavy, and the circuitous path is favorable for sedimentation of mixed gasoline. The upper partition plates and the lower partition plates are alternately arranged at intervals between the oil gas inlet and the gas outlet, so that wavy oil gas separation channels are formed. The lower partition plate is provided with an oil channel, so that separated oil can flow into the oil storage tank along the oil channel.

Another object of the present utility model is to propose a cylinder head assembly comprising a cylinder head as described above, further comprising a cylinder head cover covering the outside of the cylinder head; the cylinder head cover is provided with a communication channel, one end of the communication channel is communicated with the air outlet, and the other end of the communication channel is used for communicating an air filter.

According to the cylinder cover assembly, the oil-gas separation structure can be arranged in a narrow space by applying the cylinder cover, and the arranged oil-gas separation structure has an efficient oil-gas separation effect and has good practicability.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

fig. 1 is a schematic view of a cylinder head according to an embodiment of the present utility model;

FIG. 2 is a schematic view of a cylinder head without a baffle according to an embodiment of the present utility model;

FIG. 3 is an enlarged view of a portion of a cylinder head according to one embodiment of the present utility model;

FIG. 4 is a schematic diagram illustrating a structure of an oil-gas separation path according to an embodiment of the present utility model;

fig. 5 is a schematic structural view of a cylinder head assembly according to a second embodiment of the present utility model;

reference numerals illustrate:

1. a cylinder head body; 2. a sidewall; 3. an oil gas inlet; 4. an oil outlet; 9. an air outlet; 10. a communication passage; 10a, an oil storage tank; 100. a cylinder head; 101. an ignition coil hole; 102. a bottom wall; 1021. a longitudinal plate; 1022. a cross plate; 103. a partition plate; 104. an upper partition plate; 105. a lower partition plate; 106. a through hole; 200. a cylinder head cover.

Detailed Description

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.

In the description of the present utility model, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", "inner", "back", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present utility model. 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.

Furthermore, in the description of the present utility model, the terms "mounted," "connected," and "connected," are to be construed broadly, unless otherwise specifically defined. For example, the connection can be fixed connection, detachable connection or integrated connection; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art in combination with specific cases.

The utility model will be described in detail below with reference to the drawings in connection with embodiments.

Example 1

The present embodiment relates to a cylinder head capable of improving oil-gas separation efficiency while preventing backflow of gas to an oil-gas inlet through an oil outlet.

As a whole, the cylinder head 100 of the present embodiment, as shown in fig. 1 to 4, mainly includes a head body 1, and a side wall 2 and a bottom wall 102 provided in the head body 1. The cylinder cover body 1, the side wall 2 and the bottom wall 102 are formed into an oil-gas separation cavity in a surrounding mode, an oil-gas inlet 3 and an oil outlet 4 which are communicated with the oil-gas separation cavity are arranged on the side wall 2, and an air outlet 9 which is communicated with the oil-gas separation cavity is arranged on the cylinder cover body 1.

And, be equipped with the oil-gas separation passageway of intercommunication between oil gas import 3 and gas outlet 9 in the oil-gas separation chamber, be formed with the oil storage tank 10a that is used for accepting the fluid of oil-gas separation passageway in the diapire 102, the oil-gas separation chamber passes through oil storage tank 10a and oil-out 4 intercommunication, and when the fluid in the oil storage tank 10a reaches the preset depth threshold value, can isolate oil-gas separation chamber and oil-out 4.

In the structure, through setting up oil-gas separation chamber and oil storage tank on the cylinder cap, effectively prevent that gas from flowing back to oil gas import 3 through oil-out 4 to do benefit to improvement oil-gas separation efficiency. And with oil gas separation structure setting on the cylinder cap, not only simple structure, in narrow and small space moreover, realize the high-efficient separation of oil gas.

In detail, referring to fig. 1 to 4, a cylinder head 100 of the present embodiment includes a head body 1, and side walls 2 and a bottom wall 102 provided in the head body 1. The side wall 2 is a flat plate structure, and is connected to the cylinder head body 1 in a sealing manner, the bottom wall 102 is preferably a plate with a special-shaped structure formed on the cylinder head body 1, and the cylinder head body 1, the side wall 2 and the bottom wall 102 are formed into an oil-gas separation cavity in a surrounding manner.

The oil gas inlet 3 and the oil outlet 4 are arranged on the side wall 2 and are communicated with the oil gas separation cavity. The gas outlet 9 is arranged on the cylinder cover body 1, and a through hole 106 is also formed on the cylinder cover body 1, the through hole 106 is communicated with the oil-gas separation cavity and the gas outlet 9, and the gas separated by the oil-gas separation cavity passes through the through hole 106 and is discharged by the gas outlet 9.

In this embodiment, a partition plate 103 is provided in the oil reservoir 10a, and the oil reservoir 10a is partitioned into two oil storage sub-tanks by the partition plate 103, and one of the oil storage sub-tanks communicates with the oil outlet 4. The arrangement of the partition plate 103 is beneficial to the oil flowing into the oil storage tank 10a, and is also beneficial to realizing the isolation of the oil-gas separation cavity and the oil outlet 4 when the oil reaches a certain depth in the oil storage tank, so that the backflow of gas to the oil-gas inlet 3 through the oil outlet 4 is prevented.

In the present embodiment, the bottom wall 102 is plural, and a part of the bottom wall 102 has two longitudinal plates 1021 arranged at a pitch, and a cross plate 1022 connected to the lower portions of the two longitudinal plates 1021. The above-described oil reservoir 10a is formed by being surrounded by two longitudinal plates 1021 and a transverse plate 1022 of a bottom wall 102 thereof, and the cross section of the oil reservoir 10a is in a "U" shape. The bottom wall 102 and the oil storage tank 10a have the advantages of simple structure, convenient design and implementation, and are also beneficial to the preparation and molding of the oil-gas separation cavity.

In this embodiment, the plurality of oil storage tanks 10a are arranged on the cylinder head, and the plurality of oil storage tanks 10a are respectively located at the middle lower part of the adjacent ignition coil holes 101 of the cylinder head body 1. The arrangement position of the oil groove and the combination of the arrangement positions of the oil gas inlet 3 and the air outlet 9 can improve the oil-gas separation efficiency, and the arrangement of the oil storage groove 10a can fully utilize the limited space around the ignition coil, so that the structure is more compact.

In the present embodiment, as shown in fig. 2 and 4, the oil storage tanks 10a are arranged in two left and right directions, wherein the left and right directions specifically refer to the left and right directions in the illustrated state. As a further preferred embodiment, in the present embodiment, one of the longitudinal plates 1021 of the oil storage tank 10a located at the left extends upward from between the adjacent ignition coil holes 101 of the head body 1 to the upper portion of the oil-gas separation chamber. One of the vertical plates 1021 of the right-hand oil reservoir 10a passes upward around the adjacent ignition coil hole 101 and is smoothly connected to the partition plate 103 in the adjacent oil reservoir 10a.

With continued reference to fig. 2 and 4, in this embodiment, the oil-gas separation channel is wavy from the oil-gas inlet 3 to the gas outlet 9. In a specific structure, a plurality of upper partition plates 104 and lower partition plates 105 are arranged in the oil-gas separation cavity, the upper partition plates 104 and the lower partition plates 105 are alternately arranged between the oil-gas inlet 3 and the gas outlet 9, and the upper partition plates 104 and the lower partition plates 105 which are adjacent are arranged in a staggered manner up and down to form a wavy oil-gas separation channel. Therefore, the oil-gas mixture is separated in the wavy oil-gas separation channel, and the oil-gas separation efficiency can be further improved.

In addition, the lower partition plates 105 are preferably provided on the bottom wall 102. To facilitate the flow of oil into the oil reservoir 10a, in this embodiment, an oil channel is provided at the bottom of a portion of the lower partition 105, and the oil channel is used to enable the oil received by the bottom wall 102 to flow into the oil reservoir 10a.

The oil-gas mixture entering from the oil-gas inlet 3 circulates through the paths defined by the upper partition plate 104 and the lower partition plate 105 in this order, and the oil particles are blocked by the upper partition plate 104 and the lower partition plate 105, adhere to the upper partition plate 104 and the lower partition plate 105, and as the accumulation of oil increases, the oil flows along the upper partition plate 104 and the lower partition plate 105 toward the bottom wall 102, and then flows along the bottom wall 102 toward the oil reservoir 10a. The separated gas is directly discharged from the connecting pipeline and enters the air inlet system of the engine to continue to participate in combustion.

It should be noted that, in the present embodiment, the separated gas flow path in the oil-gas separation chamber may refer to the path shown by the dotted line in fig. 4, and the separated oil flow path may refer to the path shown by the double-dotted line in fig. 4. In addition, it should be noted that, as the oil in the oil storage tank 10a increases, when the accumulated oil reaches a certain depth, that is, when the liquid level of the oil is higher than the bottom end of the partition plate 103, the oil-gas separation chamber can be sealed, so that the gas can be prevented from flowing back from the oil outlet 4 to the oil-gas inlet 3.

In this embodiment, as a preferred embodiment, a one-way valve may be provided at the oil outlet 4 to enable the oil in the oil reservoir 10a to flow out from the oil outlet 4 in one direction, so as to facilitate the return of the oil.

It should be noted that the cylinder head 100 of the present embodiment is preferably suitable for a horizontally opposed engine, and the oil-gas separation structure provided on the cylinder head 100 can make full use of the space around the ignition coil for vertical arrangement, so that an efficient oil-gas separation effect can be achieved in a small space.

Example two

The present embodiment relates to a cylinder head assembly including a cylinder head 100 of the first embodiment, and a cylinder head cover 200 covering the outside of the cylinder head 100, as shown in fig. 5.

Wherein, the cylinder head cover 200 is provided with a communication channel 10, one end of the communication channel 10 is communicated with the air outlet 9 on the cylinder head 100, and the other end is used for communicating with an air filter. The arrangement of the communication channel 10 can prevent the connecting pipeline on the cylinder head cover 200 from being exposed, so that the connecting pipeline is arranged in the communication channel 10, and the overall aesthetic degree can be improved.

According to the cylinder cover assembly, the oil-gas separation structure can be arranged in a narrow space through the cylinder cover, and the arranged oil-gas separation structure has an efficient oil-gas separation effect, so that the use performance of an engine is improved, and the cylinder cover assembly has good practicability.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims (10)

1. A cylinder head, characterized by:

comprises a cylinder cover body (1), a side wall (2) and a bottom wall (102) which are arranged in the cylinder cover body (1);

the cylinder cover body (1), the side wall (2) and the bottom wall (102) are formed into an oil-gas separation cavity in an enclosing mode, an oil-gas inlet (3) and an oil outlet (4) which are communicated with the oil-gas separation cavity are formed in the side wall (2), and an air outlet (9) which is communicated with the oil-gas separation cavity is formed in the cylinder cover body (1);

the oil-gas separation device is characterized in that an oil-gas separation channel communicated between the oil-gas inlet (3) and the air outlet (9) is arranged in the oil-gas separation cavity, an oil storage groove (10 a) for receiving oil separated in the oil-gas separation channel is formed in the bottom wall (102), the oil-gas separation cavity is communicated with the oil outlet (4) through the oil storage groove (10 a), and when the oil in the oil storage groove (10 a) reaches a preset depth threshold value, the oil-gas separation cavity and the oil outlet (4) can be isolated.

2. The cylinder head as set forth in claim 1, wherein:

the oil storage tank (10 a) is internally provided with a partition plate (103), the oil storage tank (10 a) is divided into two oil storage sub-tanks by the partition plate (103), and one oil storage sub-tank is communicated with the oil outlet (4).

3. The cylinder head as set forth in claim 1, wherein:

the bottom wall (102) is a plurality of, and part of the bottom wall (102) is provided with two longitudinal plates (1021) which are arranged at intervals, and a transverse plate (1022) which is connected to the lower parts of the two longitudinal plates (1021);

the oil storage tank (10 a) is formed by enclosing two longitudinal plates (1021) and a transverse plate (1022) of one bottom wall (102), and the cross section of the oil storage tank (10 a) is U-shaped.

4. A cylinder head as claimed in claim 3, wherein:

the oil storage tanks (10 a) are multiple, and the oil storage tanks (10 a) are respectively positioned at the middle lower parts of the adjacent ignition coil holes (101) of the cylinder cover body (1).

5. The cylinder head as set forth in claim 4, wherein:

one of the vertical plates (1021) of each oil storage tank (10 a) extends upwards from between adjacent ignition coil holes (101) of the cylinder head body (1) to the upper part of the oil-gas separation cavity; or alternatively, the first and second heat exchangers may be,

one of the vertical plates (1021) of each oil storage tank (10 a) upwards bypasses the adjacent ignition coil hole (101) and is in smooth transition connection with the partition plate (103) in the adjacent oil storage tank (10 a).

6. The cylinder head as set forth in claim 1, wherein:

the oil-gas separation channel is wavy from the oil-gas inlet (3) to the air outlet (9).

7. The cylinder head as set forth in claim 6, wherein:

the oil-gas separation device is characterized in that a plurality of upper partition plates (104) and lower partition plates (105) are arranged in the oil-gas separation cavity, the upper partition plates (104) and the lower partition plates (105) are alternately distributed at intervals between the oil-gas inlet (3) and the air outlet (9), and the upper partition plates (104) and the lower partition plates (105) which are adjacent are arranged in an up-down staggered mode to form wavy oil-gas separation channels.

8. The cylinder head as set forth in claim 7, wherein:

each lower partition plate (105) is arranged on the bottom wall (102), and part of the lower partition plates (105) are provided with oil liquid channels which are used for enabling oil liquid received by the bottom wall (102) to flow to the oil storage tank (10 a).

9. The cylinder head according to any one of claims 1 to 8, characterized in that:

the oil outlet (4) is provided with a one-way valve, and the one-way valve is used for enabling the oil in the oil storage tank (10 a) to flow out of the oil outlet (4) in a one-way mode.

10. A cylinder head assembly, characterized by:

comprising the cylinder head (100) according to any one of claims 1 to 9, further comprising a cylinder head cover (200) covering the outside of the cylinder head (100);

the cylinder cover (100) is provided with a communication channel (10), one end of the communication channel (10) is communicated with the air outlet (9), and the other end of the communication channel is communicated with the air filter.