CN206830262U - Gs-oil separator, engine and its cylinder head assembly - Google Patents

Abstract

Present disclose provides a kind of gs-oil separator, engine and its cylinder head assembly.Gs-oil separator, wherein, the gs-oil separator includes body, the body is provided with the fixed part for installation, one-level gas oil separation structure and two level gas oil separation structure, the body defines oil-gas separation chamber and is provided with the blowby gas inlet connected with the oil-gas separation chamber, gas blowby outlet, the one-level gas oil separation structure is arranged in the oil-gas separation chamber, and close to the blowby gas inlet, the two level gas oil separation structure is arranged on the body exterior and is located at the gas blowby exit.Gs-oil separator described in the disclosure provides good oil gas separation and simple in construction is easily installed.

Description

Oil and gas separator, engine and its cylinder head assembly

technical field

The disclosure relates to the technical field of engine oil-gas separation, in particular to an oil-gas separator, an engine and a cylinder head assembly thereof.

Background technique

The working process of an internal combustion engine is usually: inhale the mixed gas (including air and fuel such as gasoline, diesel, etc.), compress it, and then ignite or compress the mixed gas to drive the piston to do work to generate power. High pressure will be generated from the compression of the mixed gas to the combustion, and the compressed mixed gas will escape from the gap between the piston and the cylinder block, the opening of the piston ring, the gap between the piston ring and the cylinder block, etc., and enter the crankcase to form a crankshaft. Box blow-by (hereinafter simply referred to as blow-by). Because the blow-by gas contains harmful components, it is necessary to inhale the blow-by gas from the intake system into the combustion chamber and discharge it from the exhaust pipe after burning. Since there is a large amount of high-temperature engine oil and oil vapor in the crankcase, the blow-by gas will carry oil vapor when passing through the crankcase (the blow-by gas can also be called "oil gas"). Ingress into combustion systems can lead to deterioration of combustion and emissions. Therefore, in order to improve economy and discharge, it is necessary to separate the oil droplets in the oil and gas.

The crankcase ventilation system of the current engine is usually equipped with an oil-air separator to separate oil and gas from the blow-by gas flowing into the crankcase, so as to meet the increasingly stringent environmental protection, emission, safety and other regulations. The oil and gas separators of traditional engines mainly include labyrinth baffle type, cyclone type, filter element type and other oil and gas separators. Among them, because the cyclone oil-gas separator has a good oil-gas separation effect, it is usually used more. However, for the oil-air separator of the external type (that is, located outside the cylinder head), due to the large number of engine components, the pipelines for connecting the oil-air separator to the crankcase ventilation system are not easy to arrange, and in cold environments Oil and gas separators and corresponding pipelines are prone to freezing, affecting the efficiency and even function of oil and gas separation. However, the built-in (that is, arranged inside the cylinder head) oil-gas separator generally requires a relatively complicated manufacturing process and is expensive.

Utility model content

In view of this, the present disclosure aims to propose an oil-gas separator, which can provide good oil-gas separation effect, and has a simple structure and is easy to install.

In order to achieve the above object, the technical solution of the present disclosure is achieved in the following way:

An oil-gas separator, wherein the oil-gas separator includes a body, the body is provided with a fixing part for installation, a primary oil-gas separation structure and a secondary oil-gas separation structure, the body defines an oil-gas separation chamber and is provided with A blow-by gas inlet and a blow-by gas outlet connected to the oil-gas separation chamber, the primary oil-gas separation structure is arranged in the oil-gas separation chamber and is close to the blow-by gas inlet, and the secondary oil-gas separation structure is arranged in The body is outside and located at the blow-by gas outlet.

Further, the body is provided with a plurality of openings, and the plurality of openings are used as inlets for the blow-by gas.

Further, an acceleration channel is provided on the body corresponding to each of the openings, the inlet of the acceleration channel is the blow-by gas inlet, and the outlet of the acceleration channel faces the primary oil-gas separation structure.

Further, the acceleration channel is configured as a cone structure whose cross-sectional size gradually decreases from the inlet to the outlet.

Further, the primary oil-gas separation structure is configured as a plate structure with a plurality of ribs, and an oil return channel is formed between two adjacent ribs.

Further, the blow-by gas outlet is configured as a plurality of strip-shaped openings arranged parallel to each other on the body, and the secondary oil-gas separation structure is configured as a curtain extending outward and rearward from each of the strip-shaped openings structure, so as to change the flow direction of the blow-by gas flowing out from the strip-shaped opening.

Further, the body includes a front wall, a rear wall, an upper wall and two side walls, the oil-gas separation chamber is surrounded by the front wall, a rear wall, an upper wall and two side walls, and the fixing part is constructed The ear part extending outward from the peripheral edge of the front wall, the blow-by gas inlet is arranged on the front wall, and the primary oil-gas separation structure is configured to extend downward from the inner surface of the upper wall , and the lower end edge of the primary oil-gas separation structure is higher than the lower end edge of the rear wall, the blow-by gas outlet is arranged on the upper wall, and the second-stage oil-gas separation structure is arranged at the blow-by gas outlet the outer surface of the upper wall.

Compared with the prior art, the oil-gas separator described in the present disclosure has the following advantages:

The oil-gas separator described in the present disclosure mainly separates the blow-by gas in the oil-gas separation chamber through the primary oil-gas separation structure, and separates the blow-by gas flowing out of the oil-gas separation chamber through the secondary oil-gas separation structure at the blow-by gas outlet. Oil and gas are separated again to minimize the amount of oil carried in the oil and gas, which has a good oil and gas separation effect, simple structure and easy production, and convenient installation through the fixing part.

Another object of the present disclosure is to provide an engine cylinder head assembly to simplify the manufacturing process and reduce the production cost while providing good oil-air separation effect.

In order to achieve the above object, the technical solution of the present disclosure is achieved in the following way:

An engine cylinder head assembly, including a cover, wherein the engine cylinder head assembly also includes an inner bottom plate, the inner bottom plate and the cover cover form a sealed chamber, and the inner bottom plate is provided with an oil return The blow-by gas intake port and the blow-by gas intake port communicated with the chamber, the cover is provided with a crankcase vent communicated with the chamber, the blow-by gas intake port and the crankcase vent port define the blow-by gas flow direction , the chamber is provided with an oil-gas coarse separation structure and an oil-gas fine-division structure, the oil-gas coarse separation structure is arranged close to the blow-by gas inlet, and the oil-gas fine separation structure is arranged at the oil-gas coarse separation structure along the flow direction of the blow-by gas. The downstream of the sub-structure, wherein the oil-gas fine separation structure is the above-mentioned oil-gas separator, and the oil-gas separator is connected to the cover and/or the inner bottom plate through the fixing part.

Further, the crude oil and gas separation structure is a plurality of cross-arranged baffles.

Compared with the prior art, the engine cylinder head assembly described in the present disclosure has the following advantages:

In the engine cylinder head assembly described in the present disclosure, the blow-by gas is in the primary oil-gas separation structure and the secondary oil-gas separation structure in the oil-gas rough separation structure and the oil-gas fine-grained structure (that is, the oil-gas separator) in the chamber respectively. Oil separation is carried out three times, which can effectively separate the oil in the blow-by gas, and has a good oil-gas separation rate. At the same time, since the oil and gas separator is fixed in the chamber through its fixing part, that is to say, the oil and gas separator is not integrated with the cover or the inner bottom plate, therefore, an oil and gas separator with a suitable size and shape can be selected according to the engine structure. Separator, which greatly reduces the difficulty of the manufacturing process, and its cost is relatively low.

The present disclosure also provides an engine, including a crankcase and an air intake system, wherein the engine includes the above-mentioned engine cylinder head assembly, the engine cylinder head assembly communicates with the crankcase through the air intake port, and the engine cylinder head assembly communicates with the crankcase through the air inlet. The crankcase vent communicates with the intake system.

Compared with the prior art, the advantages of the engine and the above-mentioned engine cylinder head assembly are the same, and will not be repeated here.

Description of drawings

The accompanying drawings constituting a part of the present disclosure are used to provide a further understanding of the present disclosure, and the schematic embodiments and descriptions of the present disclosure are used to explain the present disclosure, and do not constitute improper limitations to the present disclosure. In the attached picture:

1 is a schematic cross-sectional view of an engine cylinder head assembly described in an embodiment of the present disclosure;

Fig. 2 is a perspective view of an oil-gas separator according to an embodiment of the present disclosure;

FIG. 3 is a schematic cross-sectional view of an oil-gas separator according to an embodiment of the present disclosure.

Explanation of reference signs:

1-cover, 102-chamber, 11-crankcase vent, 12-first slot structure, 2-inner bottom plate, 21-air intake port, 22-oil return port, 23-second slot structure, 3 -coarse oil-gas separation structure, 4-oil-gas separator, 40-body; 401-front wall, 402-rear wall, 403-upper wall, 404-first side wall, 405-second side wall, 41-fixed part, 42-first-level oil-gas separation structure, 421-rib, 422-oil return channel, 43-secondary oil-gas separation structure, 44-oil-gas separation chamber, 45-blow-by gas inlet, 46-blow-by gas outlet, 47-acceleration channel.

detailed description

It should be noted that, in the case of no conflict, the embodiments in the present disclosure and the features in the embodiments can be combined with each other.

In addition, the orientation words such as "up and down" mentioned in the embodiments of the present disclosure refer to "up, down" in the vertical direction when the engine is in the state of assembly (for example, when it is assembled into a vehicle) or in use. Down", "front and back" are defined by the flow direction of the blow-by gas in the chamber, and the blow-by gas flows from front to back, and "inside and outside" refer to "inside and outside" relative to the contour of the corresponding component itself. The above orientation words are only used to explain and illustrate the present disclosure, and are not used to limit the scope of the present disclosure.

The present disclosure will be described in detail below with reference to the accompanying drawings and embodiments.

Fig. 1 shows an embodiment of an engine cylinder head assembly provided by the present disclosure, and it also shows an embodiment of an oil-gas separator provided by the present disclosure. Fig. 2 is a perspective view of the oil-air separator shown in Fig. 1, and Fig. 3 is an enlarged view. Referring to Fig. 1, the engine cylinder head assembly includes a cover 1, wherein the engine cylinder head assembly also includes an inner bottom plate 2, and the inner bottom plate 2 and the cover 1 form a sealed chamber 102, the inner bottom plate 2 is provided with an oil return port 22 and a blow-by gas intake port 21 communicating with the chamber 102, and the cover 1 is provided with a crankcase vent 11 communicating with the chamber 102, so The blow-by gas intake port 21 and the crankcase vent 11 define the flow direction of blow-by gas (refer to the arrow in FIG. 1 ), and the chamber 102 is provided with an oil-gas coarse separation structure 3 and an oil-gas fine-division structure. The crude oil and gas separation structure 3 is arranged close to the blow-by gas inlet 45, and the oil and gas fine separation structure is arranged downstream of the oil and gas rough separation structure 3 along the flow direction of the blow-by gas, wherein the oil and gas fine separation structure is oil and gas separation The oil-gas separator 4 includes a body 40, the body 40 is provided with a fixing part 41 for installation, a primary oil-gas separation structure 42 and a secondary oil-gas separation structure 43, and the body 40 defines an oil-gas separation chamber 44 And a blow-by gas inlet 45 and a blow-by gas outlet 46 communicating with the oil-gas separation chamber 44 are provided, and the primary oil-gas separation structure 42 is arranged in the oil-gas separation chamber 44 and is close to the blow-by gas inlet 45, The secondary oil-gas separation structure 43 is arranged outside the body 40 and located at the blow-by gas outlet 46 . The oil-gas separator 4 is connected to the cover 1 and the inner bottom plate 2 through the fixing portion 41 .

Along the direction of the arrow in Figure 1, after the crankcase blow-by gas enters the chamber 102 from the air intake port 21, it first passes through the oil-gas coarse separation structure 3 to separate large-sized oil droplets, and then reaches the oil-gas fine-grained structure, that is, passes through the blow-by gas inlet 45 Entering the oil-gas separator 4, along the direction of the arrow in Figure 3, the blow-by gas enters the oil-gas separation chamber 44 of the oil-gas separator 4 from the blow-by gas inlet 45, and in the oil-gas separation chamber 44, the blow-by gas is isolated from the blow-by gas through the primary oil-gas separation structure 43. Most of the oil droplets are separated; subsequently, the blow-by gas flows out from the blow-by gas outlet 46, where the secondary oil-gas separation structure 43 further separates the oil droplets in the blow-by gas, so that the blow-by gas flowing out of the oil-gas separator 4 cleaner. After the blow-by gas flows out from the blow-by gas outlet 46 of the oil-gas separator 4, it flows out from the crankcase vent 11 and enters the engine intake system to enter the combustion chamber for re-combustion.

From the above analysis, it can be seen that in the engine cylinder head assembly provided by the present disclosure, the blow-by gas is separated in the oil-gas coarse separation structure 3 and the oil-gas fine-division structure (that is, the oil-gas separator 4) in the chamber 102 respectively. The structure 42 and the secondary oil-gas separation structure 43 perform oil separation three times, which can effectively separate the oil in the blow-by gas and have a good oil-gas separation rate. At the same time, because the oil-gas separator 4 is fixed in the chamber 102 through its fixing part 41, that is to say, the oil-gas separator 4 is not integrated with the cover 1 or the inner bottom plate 2, so it can be selected according to the structure of the engine. A suitable size and shape of the oil and gas separator, which greatly reduces the difficulty of the manufacturing process, and its cost is relatively low.

In the specific embodiment provided by the present disclosure, the primary oil-gas separation structure 42 and the secondary oil-gas separation structure 43 in the oil-gas coarse separation structure 3 primary oil-gas separator 4 can have various configurations, alternatively, can be configured as For the inertial collision type oil-gas separation structure, for example, the coarse oil-gas separation structure 3 can be configured as a plurality of cross-arranged baffles, and the primary oil-gas separation structure 42 and the secondary oil-gas separation structure 43 can be constructed in the following manner.

A specific implementation of the oil-gas separator 4 provided by the present disclosure will be described in detail below with reference to FIGS. 2 and 3 .

In the specific embodiment shown in FIGS. 1 to 3 , the body 40 includes a front wall 401 , a rear wall 402 , an upper wall 403 and two side walls, that is, a first side wall 404 and a second side wall 405 , so The oil-gas separation chamber 44 is surrounded by the front wall 401, the rear wall 402, the upper wall 403 and two side walls, and the fixing part 41 is configured as an ear extending outward from the peripheral edge of the front wall 401. part, the blow-by gas inlet 45 is arranged on the front wall 401, the primary oil-gas separation structure 42 is configured to extend downward from the inner surface of the upper wall 403, and the lower end of the primary oil-gas separation structure 42 Higher than the lower end of the rear wall 402 , the blow-by gas outlet 46 is arranged on the upper wall 403 , and the secondary oil-gas separation structure 43 is arranged on the outer surface of the upper wall 403 at the blow-by gas outlet 46 . It should be noted here that the structural shape of the body 40 of the oil-gas separator 4 provided in the present disclosure is not limited to the specific embodiments shown in FIGS. , the two side walls can be removed, and the oil-gas separation chamber 44 is surrounded by corresponding parts of the front wall 401 , the rear wall 402 , the upper wall 403 , the cover 1 and the inner bottom plate 2 . In this regard, the present disclosure is not particularly limited.

In the specific embodiment shown in Fig. 2 and Fig. 3, the fixing part 41 is arranged on the upper and lower edges of the front wall 401, correspondingly, the inner surface of the cover 1 is provided with a first The slot structure 12 and the inner surface of the inner bottom plate 2 are provided with a second slot structure 23 that cooperates with the fixing portion 41 of the lower edge to securely fix the oil-gas separator 4 in the chamber 102 . Certainly, the fixing part 41 can be provided only on the upper edge or the lower edge of the pliers arm 401. Correspondingly, the oil-gas separator 4 is fixed on the fixed part 41 through the cooperation of the first slot structure 12 or the second slot structure 23. chamber 102. In addition, an interference fit may be used between the fixing portion 41 and the slot structure, so as to prevent the oil-gas separator 4 from shaking relative to each other. In addition, the fixing portion 41 can also be welded to the cover 1 and/or the inner bottom plate 2 to be firmly and reliably fixed in the chamber 102 , which helps to improve the overall NVH performance of the engine.

In a specific embodiment provided by the present disclosure, the body 40 (specifically, the front wall 41 ) is provided with a plurality of openings, and the plurality of openings are used as the blow-by gas inlets 45 . The blow-by gas enters the oil-gas separation chamber 44 through the opening, which can increase the flow velocity of the blow-by gas to a certain extent.

As an alternative, an acceleration channel 47 may be provided on the body 40 corresponding to each of the openings, the inlet of the acceleration channel 47 is the blow-by gas inlet 45, and the outlet of the acceleration channel 47 faces all the openings. Describe the primary oil-gas separation structure 42. The blow-by gas enters the acceleration passage 47 from the blow-by gas inlet 45 to be accelerated.

In the specific embodiment provided by the present disclosure, the acceleration channel 47 can be configured in various suitable ways, for example, the acceleration channel 47 can be configured such that the cross-sectional size gradually decreases from the inlet to the outlet The cone structure, as the transverse dimension of the acceleration channel 47 is getting smaller and smaller, the speed of the blow-by gas is then increasing.

What needs to be explained here is that the increase in the flow velocity of the blow-by gas will increase the flow velocity of the oil droplets carried in the blow-by gas, but the velocity increase of the larger oil droplets will be smaller than that of the smaller oil droplets , due to this difference, in the process of blow-by gas acceleration, oil droplets of different particle sizes will collide and combine into large-size oil droplets, which is more conducive to adhering to the primary oil-gas separation structure 42, further improving oil-gas separation efficiency.

Moreover, when the blow-by gas flows out from the outlet of the acceleration channel 47 , due to its high velocity, even small oil droplets can hit and adhere to the primary oil-gas separation structure 42 to be separated. Therefore, most of the engine oil carried in the blow-by gas can be separated, and the oil-gas separation efficiency can also be improved.

In order to increase the contact area with the blow-by gas, the primary oil-gas separation structure 42 can be configured as a plate structure with a plurality of ribs 421 , and an oil return channel 422 is formed between two adjacent ribs 421 . Wherein, in order to facilitate the engine oil adhering to the primary oil-gas separation structure 42 to flow downward under the action of its own gravity for recovery, the ribs 421 can extend straight up and down. The engine oil on the stage oil-air separation structure 42 experiences less resistance when flowing in the oil return channel 422 between two adjacent ribs 421 .

In addition, in the specific embodiment provided by the present disclosure, the blow-by gas outlet 46 can be configured as a plurality of strip-shaped openings arranged parallel to each other on the body 40 (specifically, the upper wall 403 ), and the secondary oil and gas The separation structure 43 is configured as a curtain structure extending outward and rearward from each of the strip-shaped openings, so as to change the flow direction of the blow-by gas flowing out of the strip-shaped openings. Thus, the contact area between the secondary oil-gas separation structure 43 and the blow-by gas can be increased, thereby facilitating the adhesion of oil droplets carried in the blow-by gas.

In addition, in the specific embodiment provided by the present disclosure, the number and size of the openings used as the blow-by gas inlet 45, the length and lateral size of the acceleration channel, the number and size of the strip-shaped openings, etc. can be set according to actual needs. parameters to meet actual needs.

The flow path of the blow-by gas in the oil-gas separator 4 and the oil-gas separation process will be described below with reference to FIG. 3 . The blow-by gas enters the acceleration channel 47 from the blow-by gas inlet 45 and is accelerated, and after flowing out from the outlet of the acceleration channel 47, it hits the primary oil-gas separation structure 42 to realize oil-gas separation; the separated oil droplets go down along the oil return channel 422 It stays and drips on the inner bottom plate 2, and finally flows into the oil pan (that is, the crankcase) through the oil return port 22 to realize engine oil recycling. However, since the blow-by gas hits the primary oil-gas separation structure 42 and the flow direction changes, when it flows past the lower end edge of the primary oil-gas separation structure 42 and flows backward, it will blow up the machine oil dripping from the oil return passage 422, thereby Bring back the oil. But there is no need to worry, because when the blow-by gas continues to flow backward and flows out from the blow-by gas outlet 46, the secondary oil-gas separation mechanism 43 arranged at the blow-by gas outlet 46 will separate the oil-gas again for the blow-by gas, so that the blow-by gas will finally pass through The blow-by gases coming out of the crankcase vent 11 are cleaner.

On the basis of the above technical solution, the present disclosure also provides an engine, including a crankcase and an air intake system, wherein the engine includes the above-mentioned engine cylinder head assembly, and the engine cylinder head assembly passes through the air intake port 21 It communicates with the crankcase, and communicates with the air intake system through the crankcase vent 11, so that the crankcase blow-by gas re-enters the combustion chamber for combustion after oil and gas separation.

The above descriptions are only preferred embodiments of the present disclosure, and are not intended to limit the present disclosure. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present disclosure shall be included in the present disclosure. within the scope of protection.

Claims (10)

1. a kind of gs-oil separator (4), it is characterised in that the gs-oil separator (4) includes body (40), the body (40) It is provided with the fixed part (41), one-level gas oil separation structure (42) and two level gas oil separation structure (43) for installation, described Body (40) defines oil-gas separation chamber (44) and is provided with the blowby gas inlet (45) connected with the oil-gas separation chamber (44), alters Gas exports (46), and the one-level gas oil separation structure (42) is arranged in the oil-gas separation chamber (44), and is altered close to described Gas entrance (45), the two level gas oil separation structure (43) are arranged on the body (40) outside and exported positioned at the gas blowby (46) place.

2. gs-oil separator (4) according to claim 1, it is characterised in that be provided with multiple open on the body (40) Hole, multiple perforates are used as the blowby gas inlet (45).

3. gs-oil separator (4) according to claim 2, it is characterised in that correspond to each institute on the body (40) State perforate and be provided with accelerated passage (47), the entrance of the accelerated passage (47) is the blowby gas inlet (45), described to accelerate to lead to The outlet in road (47) is towards the one-level gas oil separation structure (42).

4. gs-oil separator (4) according to claim 3, it is characterised in that the accelerated passage (47) is configured to from institute State the cone structure that entrance is gradually reduced to the direction cross sectional dimensions of the outlet.

5. gs-oil separator (4) according to claim 1, it is characterised in that one-level gas oil separation structure (42) structure Make as the platy structure with multiple ribs (421), drainback passage (422) is formed between adjacent two ribs (421).

6. gs-oil separator (4) according to claim 1, it is characterised in that the gas blowby outlet (46) is configured to described The multiple strip gabs being set parallel to each other opened up on body (40), the two level gas oil separation structure (43) are configured to from every The curtain sheet structure that the individual strip gab outwards extends back, to change the flowing side of the gas blowby from strip gab outflow To.

7. the gs-oil separator (4) according to any one in claim 1-6, it is characterised in that body (40) bag Include antetheca (401), rear wall (402), upper wall (403) and two side walls, the oil-gas separation chamber (44) by the antetheca (401), Rear wall (402), upper wall (403) and two side walls surround, and the fixed part (41) is configured to the peripheral edge from the antetheca (401) The ear that edge extends outward, the blowby gas inlet (45) are arranged at the antetheca (401), the one-level gas oil separation structure (42) inner surface being configured to from the upper wall (403) extends downwardly, and the lower end of the one-level gas oil separation structure (42) Edge is higher than the lower edge of the rear wall (402), and the gas blowby outlet (46) is arranged at the upper wall (403), the two level Gas oil separation structure (43) is arranged at the outer surface of the upper wall (403) at gas blowby outlet (46) place.

8. a kind of cylinder cap assembly, including housing (1), it is characterised in that the cylinder cap assembly also includes Inner bottom plating (2), the inner bottom plating (2) surround the chamber (102) of sealing with the housing (1), and the inner bottom plating (2) is provided with back Hydraulic fluid port (22) and the gas blowby air hatch (21) connected with the chamber (102), the housing (1) are provided with and the chamber (102) the crankcase ventilation mouth (11) of connection, the gas blowby air hatch (21) and the crankcase ventilation mouth (11) limit gas blowby Flow direction, the chamber (102) is interior to be provided with oil gas rough segmentation structure (3) and oil gas sub-structure, the oil gas rough segmentation structure (3) set close to the blowby gas inlet (45), the oil gas essence separation structure is arranged on the oil gas along the blowby gas flows direction The downstream of rough segmentation structure (3), wherein, the oil gas essence separation structure is the Oil-gas Separation described in any one in claim 1-7 Device (4), the gs-oil separator (4) are connected to the housing (1) and/or the inner bottom plating (2) by the fixed part (41).

9. cylinder cap assembly according to claim 8, it is characterised in that the oil gas rough segmentation structure (3) is more The baffle plate of individual cross arrangement.

10. a kind of engine, including crankcase and gas handling system, it is characterised in that the engine includes claim 8 or 9 Described cylinder cap assembly, the cylinder cap assembly are connected by the air hatch (21) and the crankcase It is logical, connected by the crankcase ventilation mouth (11) with the gas handling system.