CN112392572A

CN112392572A - Crankcase ventilation system and engine with same

Info

Publication number: CN112392572A
Application number: CN201910744508.5A
Authority: CN
Inventors: 王格
Original assignee: Shenzhen Zhenyu New Energy Power Technology Co Ltd
Current assignee: Shenzhen Zhenyu New Energy Power Technology Co Ltd
Priority date: 2019-08-13
Filing date: 2019-08-13
Publication date: 2021-02-23

Abstract

The invention discloses a crankcase ventilation system and an engine with the same. The crankcase ventilation system includes: the cylinder assembly is provided with a one-way valve assembly mounting hole, and the cylinder assembly is internally provided with an internal cylinder channel which is communicated with the one-way valve assembly mounting hole and the crankcase cavity; the integrated check valve component is arranged in the check valve component mounting hole and is provided with a public interface, a high-load air outlet interface and an air supply interface, the high-load air outlet interface is communicated with an air outlet of the crankcase cavity, the air supply interface is communicated with an air supply port of the crankcase cavity, and the public interface is selectively communicated with the high-load air outlet interface or the public interface. According to the crankcase ventilation system, the air replenishing interface can be arranged in most areas of the air cylinder assembly, so that air blowby in a crankcase chamber can be discharged timely, and meanwhile, the common interface and the external pipeline are shared by the air replenishing channel and the high-load air outlet channel, so that the occupied space of the crankcase ventilation system can be reduced.

Description

Crankcase ventilation system and engine with same

Technical Field

The invention relates to the field of engines, in particular to a crankcase ventilation system and an engine with the crankcase ventilation system.

Background

The crankcase chamber of the crankcase is a relatively sealed space, and during the operation of the engine, combustion products in the combustion chamber can enter the crankcase chamber from gaps between piston rings and a cylinder wall to form blow-by gas, and the blow-by gas can cause the performance of engine oil to be reduced, so that the engine is abraded.

Crankcase ventilation system can be with the blowby gas in the crankcase cavity in time, directly or indirectly inhale air intake manifold effectively, and then the blowby gas is the reburning in the combustion chamber, prevents effectively that crankcase pressure is too high, avoids the blowby gas to reveal the polluted environment, effectively reduces blowby gas and machine oil contact, extension machine oil life.

Therefore, an efficient crankcase ventilation system is of great importance for the engine, and particularly, to further prevent blow-by gas from polluting the environment, the crankcase ventilation system is designed with a gas supplementing channel.

Crankcase ventilation system's tonifying qi passageway design on the market at present has:

(1) an independent air supply channel is designed independently, an air supply interface can be designed at a reasonable position, but an air supply pipeline and a one-way valve are required to be designed independently, so that the arrangement space is increased, and the cost is high;

(2) the gas supplementing channel and the high-load gas outlet channel share the channel and are commonly used for two labyrinth type oil-gas separators which are in parallel connection, the gas supplementing process and the high-load gas outlet process both pass through one labyrinth type oil-gas separator, the gas supplementing interface is generally arranged at the inlet of the labyrinth type oil-gas separator, the design can only be generally used for a crankcase ventilation system of the two labyrinth type oil-gas separators which are in parallel connection, the application range is small, meanwhile, the arrangement position of the gas supplementing interface is limited, and the scavenging effect of fresh.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the above-mentioned problems in the prior art. Therefore, the crankcase ventilation system provided by the invention can realize diversification of arrangement positions of the air supply interfaces and is beneficial to improving the scavenging effect.

The invention also provides an engine with the crankcase ventilation system.

A crankcase ventilation system according to an embodiment of the invention comprises: the cylinder assembly is provided with a one-way valve assembly mounting hole, an air cylinder inner channel is arranged in the cylinder assembly, and the air cylinder inner channel is communicated with the one-way valve assembly mounting hole and a crankcase cavity of a crankcase; the integrated one-way valve assembly is arranged in the one-way valve assembly mounting hole and is provided with a public interface, a high-load air outlet interface and an air supply interface, the high-load air outlet interface is communicated with an air outlet of the crankcase chamber, the air supply interface is communicated with an air supply port of the crankcase chamber, and the public interface is selectively communicated with the high-load air outlet interface or the public interface.

According to the crankcase ventilation system, the air replenishing interface can be arranged in most areas of the air cylinder assembly, the air replenishing interface can be arranged at a better position to improve the scavenging effect of fresh air, so that the air blowby in a crankcase chamber can be discharged in time, and meanwhile, the common interface and an external pipeline are shared by the air replenishing channel and the high-load air outlet channel, so that the occupied space of the crankcase ventilation system can be reduced, and the manufacturing cost of the crankcase ventilation system can be saved.

According to some embodiments of the invention, the integrated one-way valve assembly comprises: the air conditioner comprises a shell, wherein a public cavity, a high-load air outlet cavity and an air supplementing cavity are arranged in the shell, a public interface is communicated with the public cavity, a high-load air outlet interface is communicated with the high-load air outlet cavity, an air supplementing interface is communicated with the air supplementing cavity, and the public cavity is selectively communicated with the high-load air outlet cavity or the air supplementing cavity.

Furthermore, the public cavity and the high-load air outlet cavity are separated by an air outlet partition wall, an air outlet on-off valve is arranged on the air outlet partition wall, the public cavity and the air supply cavity are separated by an air supply partition wall, an air supply on-off valve is arranged on the air supply partition wall, and the air outlet on-off valve and the air supply on-off valve are alternatively opened.

Further, the air outlet on-off valve is an air outlet one-way valve, and the air outlet one-way valve is opened under the condition that the pressure difference between the high-load air outlet cavity and the public cavity is greater than the opening pressure of the air outlet one-way valve.

Further, the air supply on-off valve is an air supply one-way valve, and the air supply one-way valve is opened under the condition that the pressure difference between the public cavity and the air supply cavity is greater than the opening pressure of the air supply one-way valve.

According to some embodiments of the invention, an oil-gas separator is arranged outside the high-load gas outlet interface, and the high-load gas outlet interface is communicated with a gas outlet of the oil-gas separator.

According to some embodiments of the invention, the cylinder assembly comprises: a cylinder block and a cylinder head mounted on the cylinder block, the in-cylinder passage including: a cylinder block internal passage formed in the cylinder block and a cylinder head internal passage formed in the cylinder head, the check valve assembly mounting hole, the cylinder head internal passage, the cylinder block internal passage communicating.

Further, the cylinder assembly further comprises: the cylinder cover is arranged on the cylinder cover, and the one-way valve assembly mounting hole is formed in the cylinder cover.

Further, the check valve assembly mounting hole is provided in the cylinder block or the cylinder head.

An engine according to another aspect of the present invention includes the crankcase ventilation system described above.

The engine has the same advantages as the crankcase ventilation system described above over the prior art and will not be described in detail here.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

FIG. 1 is a cross-sectional view of a crankcase ventilation system;

FIG. 2 is a cross-sectional view of the integrated check valve assembly;

FIG. 3 is a schematic view of gas flow in a gas supply channel and a high load gas outlet channel.

Reference numerals:

the cylinder assembly 1, the cylinder cover 11, the check valve assembly mounting hole 111, the cylinder block 12, the cylinder block internal passage 121, the cylinder head 13, the cylinder head internal passage 131, the cylinder internal passage 14, the integrated check valve assembly 2, the common port 21, the high-load air outlet port 22, the air supply port 23, the shell 24, the common cavity 241, the high-load air outlet cavity 242, the air supply cavity 243, the air outlet partition wall 244, the air outlet on-off valve 2441, the air supply partition wall 245, the air supply on-off valve 2451, the oil-gas separator 3 and the air outlet 31 of the oil-gas separator.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically connected, electrically connected or can communicate with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

A crankcase ventilation system according to an embodiment of the invention is described in detail below with reference to fig. 1-3.

Referring to fig. 1 and 2, a crankcase ventilation system includes: cylinder assembly 1, integrated form check valve subassembly 2.

The cylinder assembly 1 is provided with a one-way valve assembly mounting hole 111, an inner cylinder channel 14 is arranged in the cylinder assembly 1, and the inner cylinder channel 14 is communicated with the one-way valve assembly mounting hole 111 and a crankcase cavity of a crankcase.

The integrated check valve component 2 is arranged in the check valve component mounting hole 111, the integrated check valve component 2 is provided with a public interface 21, a high-load air outlet interface 22 and an air supply interface 23, the high-load air outlet interface 22 is communicated with an air outlet of a crankcase chamber, the air supply interface 23 is communicated with an air supply port of the crankcase chamber, the public interface 21 is selectively communicated with the high-load air outlet interface 22 or the public interface 21, and the upper part of the public interface 21 is communicated with an external pipeline.

An air supply channel and a high-load air outlet channel are formed in the crankcase ventilation system, and the air supply channel can comprise: external pipeline, common interface 21, tonifying qi interface 23, the interior passageway 14 of cylinder, the tonifying qi mouth of crankcase cavity, the high load air outlet channel can include: an air outlet hole of the crankcase, a high-load air outlet interface 22, a common interface 21 and an external pipeline.

Specifically, fresh air passes through the tonifying qi passageway and gets into the crankcase cavity, and fresh air mixes with the blowby gas in the crankcase cavity and forms the mist, and after the high load passageway of giving vent to anger was flowed through to the mist, the mist was by direct or indirect suction intake manifold, and then the mist burns at the combustion chamber again to the realization prevents that crankcase pressure is too high, avoids the blowby gas to reveal the polluted environment, reduces blowby gas and machine oil contact, reduces machine oil dilution, machine oil emulsification and the risk of freezing, extension machine oil life.

According to the crankcase ventilation system, the air supply interface 23 can be arranged in most regions of the cylinder assembly 1, the air supply interface 23 can be arranged at a preferred position to improve the scavenging effect of fresh air, so that the air blowby in a crankcase chamber can be eliminated in time, meanwhile, the common interface 21 and an external pipeline are shared by the air supply channel and a high-load air outlet channel, so that the occupied space of the crankcase ventilation system can be reduced, and the manufacturing cost of the crankcase ventilation system can be saved.

Referring to fig. 2, the integrated check valve assembly 2 includes: the shell 24 is provided with a common cavity 241, a high-load air outlet cavity 242 and an air replenishing cavity 243 in the shell 24, the common interface 21 is communicated with the common cavity 241, the high-load air outlet interface 22 is communicated with the high-load air outlet cavity 242, the air replenishing interface 23 is communicated with the air replenishing cavity 243, and the common cavity 241 can be selectively communicated with the high-load air outlet cavity 242 or the air replenishing cavity 243.

Specifically, when the common chamber 241 communicates with the high-load outlet chamber 242, the crankcase exhausts the high-pressure gas in the crankcase chamber through the high-load outlet passage, and when the common chamber 241 communicates with the air charging chamber 243, the fresh air enters the crankcase chamber through the air charging passage.

Further, the common cavity 241 and the high-load gas outlet cavity 242 are separated by a gas outlet partition wall 244, a gas outlet on-off valve 2441 is arranged on the gas outlet partition wall 244, when the gas outlet on-off valve 2441 is opened, the common cavity 241 is communicated with the high-load gas outlet cavity 242, and when the gas outlet on-off valve 2441 is closed, the common cavity 241 is not communicated with the high-load gas outlet cavity 242; the common cavity 241 and the air supply cavity 243 are separated by an air supply partition wall 245, an air supply on-off valve 2451 is arranged on the air supply partition wall 245, when the air supply on-off valve 2451 is opened, the common cavity 241 is communicated with the air supply cavity 243, and when the air supply on-off valve 2451 is closed, the common cavity 241 is not communicated with the air supply cavity 243. The air outlet on-off valve 2441 and the air supply on-off valve 2451 are alternatively opened to realize that the integrated one-way valve component 2 has a two-way one-way walking structure with a tee joint and two joints.

Specifically, referring to the dotted arrow in fig. 3, the air outlet on-off valve 2441 is an air outlet check valve, the air supply on-off valve 2451 is an air supply check valve, when the pressure difference between the high-load air outlet cavity and the common cavity 241 is greater than the opening pressure of the air outlet check valve, the air outlet check valve is opened, the air supply check valve is closed, and the mixed gas in the crankcase sequentially flows through the air outlet hole of the crankcase chamber, the high-load air outlet interface 22, the high-load air outlet cavity 242, the air outlet check valve, the common cavity 241, the common interface 21, and the external pipeline, so as to discharge the blow-by gas in the crankcase.

Referring to the solid arrow in fig. 3, when the pressure difference between the common cavity 241 and the air make-up cavity 243 is greater than the opening pressure of the air make-up check valve, the air make-up check valve is opened, the air outlet check valve is closed, and the fresh air sequentially flows through the external pipeline, the common port 21, the common cavity 241, the air make-up check valve, the air make-up cavity 243, the air make-up port 23, the cylinder internal passage 14, and the air make-up port of the crankcase cavity, so as to implement the purpose of making up the crankcase.

Referring to fig. 1, an oil-gas separator 3 is arranged outside the high-load gas outlet interface 22, and the high-load gas outlet interface 22 is communicated with a gas outlet 31 of the oil-gas separator 3.

Specifically, the oil-gas separator 3 is located between the gas outlet hole of the crankcase chamber and the high-load gas outlet interface 22, the oil-gas separator 3 can separate the engine oil from the mixed gas, and the engine oil returns to the oil pan, so that the engine oil is saved, the mixed gas in the crankcase chamber flows into the high-load gas outlet interface 22 through the gas outlet 31 of the oil-gas separator after the oil is separated by the oil-gas separator 3, and the engine oil is prevented from entering the combustion chamber along with the mixed gas to affect the working condition of the engine, optionally, the oil-gas separator 3 is a labyrinth type oil-gas separator.

Referring to fig. 1, a cylinder assembly 1 includes: a cylinder block 12 and a cylinder head 13, the cylinder head 13 being mounted on the cylinder block 12, the in-cylinder passage 14 including: a cylinder block internal passage 121 formed in the cylinder block 12 and a cylinder head internal passage 131 formed in the cylinder head 13, the check valve assembly mounting hole 111, the cylinder head internal passage 131, and the cylinder block internal passage 121 communicate to realize an in-cylinder passage 14 through which fresh air can enter the crankcase.

In the embodiment shown in fig. 1, the cylinder assembly 1 further comprises: the cylinder head cover 11, the cylinder head cover 11 is installed on the cylinder head 13, and the check valve assembly mounting hole 111 is opened on the cylinder head cover 11 to realize the installation of the integrated check valve assembly 2.

In other embodiments of the present invention, the mounting hole 111 of the check valve assembly is formed in the cylinder block 12 or the cylinder head 13, so as to facilitate the position selection of the air supply port 23 to be diversified, and a more reasonable position of the air supply port 23 can be designed to ensure a good scavenging effect, thereby facilitating the reduction of the risks of engine oil dilution, engine oil emulsification and icing, and prolonging the service life of the engine oil.

An engine according to another aspect of the present invention includes the crankcase ventilation system of the above embodiment.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example" or "some examples" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. A crankcase ventilation system, comprising:

the cylinder assembly is provided with a one-way valve assembly mounting hole, an air cylinder inner channel is arranged in the cylinder assembly, and the air cylinder inner channel is communicated with the one-way valve assembly mounting hole and a crankcase cavity of a crankcase;

the integrated one-way valve assembly is arranged in the one-way valve assembly mounting hole and is provided with a public interface, a high-load air outlet interface and an air supply interface, the high-load air outlet interface is communicated with an air outlet of the crankcase chamber, the air supply interface is communicated with an air supply port of the crankcase chamber, and the public interface is selectively communicated with the high-load air outlet interface or the public interface.

2. The crankcase ventilation system of claim 1, wherein the integrated check valve assembly comprises: the air conditioner comprises a shell, wherein a public cavity, a high-load air outlet cavity and an air supplementing cavity are arranged in the shell, a public interface is communicated with the public cavity, a high-load air outlet interface is communicated with the high-load air outlet cavity, an air supplementing interface is communicated with the air supplementing cavity, and the public cavity is selectively communicated with the high-load air outlet cavity or the air supplementing cavity.

3. The crankcase ventilation system according to claim 2, wherein the common cavity and the high-load gas outlet cavity are separated by a gas outlet partition wall, a gas outlet on-off valve is arranged on the gas outlet partition wall, the common cavity and the gas supply cavity are separated by a gas supply partition wall, a gas supply on-off valve is arranged on the gas supply partition wall, and the gas outlet on-off valve and the gas supply on-off valve are alternatively opened.

4. The crankcase ventilation system according to claim 3, wherein the outlet on-off valve is an outlet check valve, and the outlet check valve opens when the pressure difference between the high-load outlet cavity and the common cavity is greater than the cracking pressure of the outlet check valve.

5. The crankcase ventilation system of claim 3, wherein the makeup check valve is a makeup check valve that opens when a pressure differential between the common cavity and the makeup cavity is greater than a cracking pressure of the makeup check valve.

6. The crankcase ventilation system according to claim 1, wherein an oil-gas separator is arranged outside the high-load gas outlet interface, and the high-load gas outlet interface is communicated with a gas outlet of the oil-gas separator.

7. The crankcase ventilation system of claim 1, wherein the cylinder assembly comprises: a cylinder block and a cylinder head mounted on the cylinder block, the in-cylinder passage including: a cylinder block internal passage formed in the cylinder block and a cylinder head internal passage formed in the cylinder head, the check valve assembly mounting hole, the cylinder head internal passage, the cylinder block internal passage communicating.

8. The crankcase ventilation system of claim 7, wherein the cylinder assembly further comprises: the cylinder cover is arranged on the cylinder cover, and the one-way valve assembly mounting hole is formed in the cylinder cover.

9. The crankcase ventilation system of claim 7, wherein the check valve assembly mounting hole opens in the cylinder block or the cylinder head.

10. An engine comprising a crankcase ventilation system according to any one of claims 1-9.