CN213510792U

CN213510792U - Engine respirator

Info

Publication number: CN213510792U
Application number: CN202022110298.5U
Authority: CN
Inventors: 邓朝辉; 顾秋军; 王坚; 田莉; 杨吉兴
Original assignee: Caterpillar Motoren GmbH and Co KG
Current assignee: Caterpillar Motoren GmbH and Co KG
Priority date: 2020-09-23
Filing date: 2020-09-23
Publication date: 2021-06-22
Anticipated expiration: 2030-09-23

Abstract

The utility model relates to an engine breather, including the oil-gas separation module, this oil-gas separation module is injectd and is used for making the oil-gas separation that the gas that has machine oil flows through regional, and wherein, this oil-gas separation module is including all setting up vortex structure and accuse temperature structure in the oil-gas separation region are used for delaying simultaneously gaseous flow and change gaseous temperature. The utility model discloses make the engine respirator can not receive ambient temperature to influence ground work, expanded engine respirator's application.

Description

Engine respirator

Technical Field

The utility model relates to an engine respirator, more specifically relate to the oil-gas separation technique among the engine respirator.

Background

During operation of the engine, a portion of the combustible mixture and combustion products may blow into the crankcase via a gap such as a gap between a piston ring and a cylinder wall and gradually accumulate to increase the pressure of the crankcase. For this reason, an engine breather is provided for discharging the blowby gas to the outside during the operation of the engine, thereby equalizing the pressure inside the engine (inside the crankcase) with the outside. Since such high temperature blow-by gas may cause evaporation of engine oil (e.g., from an oil sump in communication with the crankcase) to form an oil-laden mixture, it is also desirable that the breather enable oil-gas separation to be achieved before such mixture-type blow-by gas is expelled, such that oil is retained in the engine to meet regulatory emission standards requirements on the one hand, and to reduce or avoid unnecessary engine oil loss on the other hand.

For example, document CN107701263A discloses an oil-gas separation device comprising a rotary oil separator and a controller. The rotary oil separator is connected with the breather air outlet pipe, the engine air inlet pipe and the engine oil pan and used for carrying out oil-gas separation on mixed gas exhausted by the breather air outlet pipe, outputting the separated gas to the engine air inlet pipe and outputting the separated oil to the engine oil pan. This oil-gas separation scheme requires an independent oil-gas separation device, is complex in structure and is costly.

It is common to provide a labyrinth gas flow path or a metal plug in the area of the engine breather where the air-fuel mixture flows, in order to reduce the flow rate of the air-fuel mixture and thereby to reduce the time for the oil in the mixture to condense and separate. However, in this design, the oil is condensed by the temperature difference between the high-temperature mixture and the ambient temperature, and therefore is greatly affected by the external temperature, and is only suitable for open applications. For the occasions with overhigh outside temperature or relatively closed working space, the oil-gas separation efficiency of the engine breather can be obviously reduced, so that most of engine oil is directly discharged into the atmosphere in a gaseous state, and the waste of the engine oil of the engine and the environmental pollution are caused.

SUMMERY OF THE UTILITY MODEL

The utility model provides an engine breather, it includes the oil-gas separation module, and this oil-gas separation module is injectd and is used for making the oil-gas separation that the gas that has machine oil flows through regional, and wherein, this oil-gas separation module is including all setting up vortex structure and accuse temperature structure in the oil-gas separation region are used for delaying simultaneously gaseous flow and change gaseous temperature.

The utility model discloses make the engine respirator can not receive outside temperature to influence ground work, allow to keep the temperature in the oil gas separation region at best operating temperature, avoided the waste of engine oil and the pollution of environment. Moreover, the utility model discloses engine respirator's application scenario has still been expanded.

The engine respirator of the utility model has the following beneficial technical characteristics:

-the temperature control structure comprises one or more cooling tubes arranged transversely to the flow direction of the gas, for guiding engine coolant;

-the number of cooling pipes is designed to be variable so as to allow varying the amount of engine coolant passing through the oil-gas separation zone;

-the oil-gas separation module comprises a housing delimiting the oil-gas separation zone, the housing comprising at least two flat wall portions opposite each other, the cooling pipe being arranged across the two flat wall portions;

-said two flat wall portions are formed with respective holes aligned with each other, the two ends of each cooling tube being housed in the respective holes;

-the oil-gas separation module further comprises an inlet and an outlet connection arranged outside the flat wall portion and communicating with one of the two ends of all cooling pipes, respectively, wherein the inlet and outlet connections each comprise a pipe section and a support, the support comprising a bottom and a circumferential wall surrounding the bottom, the pipe section opening into the bottom, the circumferential wall extending from the bottom in a direction away from the pipe section and being intended to be fixed to the respective flat wall portion to cover the end of the cooling pipe lying on that flat wall portion;

-the housing has a generally rectangular cross-sectional shape;

-the flow perturbation structure comprises a wire arranged around the cooling tube;

-the engine breather further comprises an exhaust cap module removably connected to the oil and gas separation module, the exhaust cap module having an exhaust port in communication with the gas flow outlet of the oil and gas separation module;

the engine breather further comprises a base module detachably connected to the oil-gas separation module, the base module having a passage communicating the oil-gas separation region of the oil-gas separation module with a vent of an engine crankcase.

Drawings

FIG. 1 is an external perspective view of an engine respirator according to one embodiment;

FIG. 2 is a side view, partially in cross-section, of the engine respirator shown in FIG. 1;

FIG. 3 is a perspective view of an oil and gas separation module according to one embodiment; and

fig. 4 and 5 show perspective views of components of the oil and gas separation module of fig. 3.

Detailed Description

Embodiments of the present invention will be described below with reference to the drawings.

The engine respirator of the utility model can be applied to the occasions of carrying out good heat exchange with the external environment, such as the engine of the ordinary vehicle working in the open environment. The engine respirator of the present invention can also be applied to the case where the heat exchange condition with the external environment is poor, for example, an engine that operates in a closed or semi-closed environment such as a cabin or a container, and also, for example, an engine that is dedicated to a vehicle that operates on a plateau (not easily exchanging heat with the external environment because the air is thin).

Referring to FIG. 1, an embodiment of an engine breathing apparatus of the present invention is shown. The engine breather may include an oil and gas separation module 10, an exhaust cover module 20, and a base module 30. The oil and gas separation module 10 may define an oil and gas separation region for flowing a high temperature mixed gas with oil therethrough. As is generally known, the mixture gas is basically composed of blow-by gas of the engine and oil vapor evaporated by high temperature. The venting cover module 20 may be disposed downstream of the oil-gas separation module 10 in the flow direction of the gas and may be used to direct the gas that has been separated from the oil to the outside environment. The base module 30 may be mounted to the top cover or side of the engine block, etc., and communicates with a vent port of the crankcase of the engine for directing the mixture.

As shown in fig. 1-2, the vent cover module 20 may include a first cylindrical portion 21 and a second cylindrical portion 22 that communicate with each other and form an angle (e.g., substantially perpendicular). The first cylindrical portion 21 may be detachably connected at one end to the oil-gas separation module 10 by means of a base 23, for example, in the form of a plate. The second cylindrical portion 22 may be located remotely from the oil and gas separation module 10 and may have a vent for venting gases. The base module 30 may include a barrel portion 31 that communicates the oil and gas separation region of the oil and gas separation module 20 with a vent port of the engine crankcase, and may be detachably connected to the oil and gas separation module 20 at an end portion by a plate-like base 32, for example.

In particular, the venting cover module 20 and the base module 30 can be detachably connected to the oil-gas separation module 10 on both sides of the oil-gas separation module 10 by means of bolts and nuts, respectively, and via sealing gaskets and/or rubber sealing rings.

Of course, it is also possible to use the exhaust cover module 20 and the oil-gas separation module 10 in combination, instead of the base module 30, for mounting on a suitable component of the engine.

According to the utility model discloses, oil-gas separation module 10 includes vortex structure and accuse temperature structure, vortex structure and accuse temperature structure all set up in this oil-gas separation module 10's oil-gas separation region to be used for both delaying the velocity of flow that has the mist of machine oil in this region, change and especially reduce this mist's temperature again simultaneously.

Referring to fig. 2-4, the oil-gas separation module 10 may include a housing 11, and the housing 11 may have a circumferential wall and

cover plates

112, 113, the

cover plates

112, 113 covering both ends of the circumferential wall, thereby defining a closed space as an oil-gas separation region. The

cover plates

112, 113 may each have a generally centrally located opening for communicating with the exhaust module 20 and the base module 30, respectively, and forming a passageway for the gas to flow through.

According to one embodiment, the temperature control structure may comprise one or more cooling tubes 12 arranged transverse to the flow direction of the gas, which cooling tubes 12 are used to guide the engine coolant through the oil-gas separation zone in order to reduce the temperature of the gas in this zone by heat exchange. In particular, the number of cooling pipes 12 may be varied to allow varying amounts of engine coolant to pass through the oil-gas separation zone. For example, the number of cooling pipes 12 may be changed according to the flow rate of gas or the content of oil in gas in the application.

As shown in fig. 2 and 3, the flow perturbation structure may comprise a filler, in particular a wire 15, arranged in the housing 11 around the cooling tube 12. The wires 15 may fill the gaps between the cooling tubes 12 in the housing 11 in order to dissipate the kinetic energy of the gas flowing through the gas-oil separation zone and thereby enable sufficient condensation time of the oil vapor in the gas, while facilitating the condensed oil droplets to drip down these wires 15 and flow into the oil sump (not shown) below.

Referring to fig. 2-4, according to one embodiment, the peripheral wall of the housing 11 may include at least two flat wall portions 111 opposite to each other, and the cooling pipe 12 may be disposed across the two flat wall portions 111. Preferably, the peripheral wall of the housing 11 may have four flat wall portions 111 facing each other two by two, whereby the housing 11 has a generally rectangular cross-sectional shape, as can be seen from fig. 3 and 4.

Preferably, holes aligned with each other may be formed on two flat wall portions 111 of the housing 11 opposed to each other for housing the respective cooling pipes 12. For example, as best shown in fig. 4, a plurality of rows (e.g., four rows as shown in the drawing) of through-holes may be formed on each of two opposing flat wall portions 111, and the through-holes on the two flat wall portions 111 may be aligned two by two so as to receive the end portions of the respective cooling tubes 12 with the through-holes paired with each other.

Referring now to fig. 3 and 5, according to one embodiment, the oil-gas separation module 10 further comprises an inlet nipple 13 and an outlet nipple 14, which are arranged outside the housing 11, in particular outside the flat wall 111 thereof, and which communicate with one of the two ends of all the cooling pipes 12, respectively. The inlet connection 13 and the outlet connection 14 may be connected as a bypass in the circulation line of the engine coolant for guiding the engine coolant through the cooling pipe 12. The inlet connection 13 and the outlet connection 14 can have the same configuration.

The construction of the inlet nipple 13 is explained below with reference to fig. 4. As shown, the inlet connection 13 may include a pipe segment 131 for connecting a circulation line of engine coolant and a support for fixing the pipe segment 131 to the housing 11. The support may include a base 132 and a circumferential wall 133, the circumferential wall 133 being disposed about the base 132 and extending generally perpendicular to the base 132 in a direction opposite the tube segments 131, thereby defining a recessed receiving space. The bottom 132 has an opening in a substantially central position, through which the tube piece 131 opens into the receiving space.

During assembly, the circumferential wall 133 of the inlet connection piece 13 can be fastened in a liquid-tight manner to the side wall of the housing 11, for example by welding or adhesive bonding, so that the receiving space of this inlet connection piece 13 faces and surrounds the ports of all the cooling pipes 12. In this way, the engine coolant can enter the receiving space via the pipe section 131 and then be distributed into the individual cooling pipes 12.

It will be appreciated that the construction and assembly of the outlet nipple 14 is the same as that of the inlet nipple 13 and will therefore not be described in detail.

INDUSTRIAL APPLICABILITY

The utility model discloses an engine breather can adjust (especially reduce) the temperature that flows through the regional mist that contains machine oil vapour of oil-gas separation voluntarily, this one side has reduced the dependency to ambient temperature and has enlarged engine breather and can be used for the occasion wherein, and on the other hand has improved oil-gas separation efficiency, has avoided the pollution of the waste of engine oil and environment.

Moreover, the engine breather of the utility model can control the quantity of the engine coolant liquid in the oil-gas separation region through changing the quantity of the cooling pipe to be applicable to different engine types or different operating conditions.

This description is intended for illustrative purposes only, and should not be construed to limit the scope of the present disclosure in any way. Accordingly, it will be appreciated by those of ordinary skill in the art that changes can be made to the specific embodiments disclosed without departing from the full and fair scope and spirit of the invention. Other aspects, features and advantages will be apparent from the accompanying drawings and from the appended claims.

Claims

1. An engine breather comprising an oil-gas separation module (10), the oil-gas separation module (10) defining an oil-gas separation region for flow-through of a gas with oil, wherein the oil-gas separation module (10) comprises a flow-disturbing structure and a temperature-controlling structure both arranged in the oil-gas separation region for simultaneously retarding the flow of the gas and changing the temperature of the gas.

2. Engine breather according to claim 1, wherein the temperature control structure comprises one or more cooling tubes (12) arranged transversely to the flow direction of the gas, the cooling tubes (12) being used for guiding engine coolant.

3. Engine breather according to claim 2, characterised in that the number of cooling pipes (12) is designed to be variable in order to allow varying the amount of engine coolant passing through the oil-gas separation zone.

4. The engine breather of claim 2 or 3, wherein the oil-gas separation module (10) comprises a housing (11) delimiting the oil-gas separation zone, the housing (11) comprising at least two flat wall portions (111) opposite each other, the cooling pipe (12) being arranged across the two flat wall portions (111).

5. Engine respirator according to claim 4, characterized in that the two flat wall parts (111) are formed with holes aligned with each other, respectively, and that the two ends of each cooling tube (12) are placed in the corresponding holes, respectively.

6. Engine respirator according to claim 5, characterized in that the oil-gas separation module (10) further comprises an inlet nipple (13) and an outlet nipple (14) which are arranged outside the flat wall portion (111) and which communicate with one of the two ends of all cooling pipes (12) respectively, wherein the inlet nipple (13) and the outlet nipple (14) each comprise a pipe section (131) and a support comprising a bottom (132) and a circumferential wall (133) surrounding the bottom (132), the pipe section (131) opening into the bottom (132), the circumferential wall (133) extending from the bottom (132) in a direction away from the pipe section (131) and being intended to be fixed to the respective flat wall portion (111) to cover the end of the cooling pipe lying on this flat wall portion (111).

7. Engine respirator according to claim 4, characterized in that the housing (11) has a generally rectangular cross-sectional shape.

8. An engine respirator according to claim 2 or 3, wherein the flow perturbation structure comprises a wire (15) arranged around the cooling tube (12).

9. The engine breather of any of claims 1-3, further comprising an exhaust cover module (20) removably connected to the oil-gas separation module (10), the exhaust cover module (20) having an exhaust port in communication with the airflow outlet of the oil-gas separation module (10).

10. The engine breather of any of claims 1-3, further comprising a base module (30) removably connected to the oil-gas separation module (10), the base module (30) having a passage communicating an oil-gas separation region of the oil-gas separation module (10) with a vent port of an engine crankcase.