Description:FIELD
The present disclosure relates to a breather device for a combustion engine, and particularly relates to a breather device which guides oil mist from a crank chamber towards an air filter.
DEFINITION
As used in the present disclosure, the following terms are generally intended to have the meaning as set forth below, except to the extent that the context in which they are used indicate otherwise.
BLOWBY GAS: The expression ‘blowby gas’ used in the context of this disclosure refers to, the gas that leaks at the piston, rings and liner system in reciprocating internal combustion engines is called blow-by gas. The blow-by is a complex mixture of air, burned and unburned gases and oil mist.
SCAVENGING: The expression ‘scavenging’ used in the context of this disclosure refers to, but is not limited to, replacing the exhaust gas in a cylinder of an internal combustion engine with the fresh air/fuel mixture (or fresh air, in the case of direct-injection engines) for the next cycle of working stroke.
BACKGROUND
The background information herein below relates to the present disclosure but is not necessarily prior art.
Generally, in a combustion engine mounted on a motorcycle, oil mist in the combustion engine is introduced into a breather to perform gas-liquid separation therein. Conventionally, a plate like breather device is used to perform the gas-liquid separation. However, the conventional plate like breather device directs the oil mist towards the air filter without much separation of oil traces from oil mist, which thereby increases the fuel consumption.
Thus, there is felt a need for a breather device for a combustion engine that alleviates the aforementioned drawbacks.
OBJECTS
Some of the objects of the present disclosure, which at least one embodiment herein satisfies, are as follows:
An object of the present invention is to provide a breather device for a combustion engine.
Another object of the present invention is to provide a breather device for a combustion engine which effectively separate oil mist.
Yet another object of the present invention is to provide a breather device for a combustion engine which reduces the oil consumption of the engine.
Still another object of the present invention is to provide a breather device for a combustion engine which provides controlled air circulation.
Yet another object of the present invention is to provide a breather device for a combustion engine which promotes scavenging effect.
Still another object of the present invention is to provide a breather device for a combustion engine which offers ease of assembly.
Yet another object of the present invention is to provide a breather device for a combustion engine which is easy for maintenance.
Still another object of the present invention is to provide a breather device for a combustion engine which offers effective sealing of oil mist passage.
SUMMARY
The present disclosure envisages a breather device for a combustion engine. The device is configured to be disposed within crankcase of the engine. The device comprises at least one opening, and a baffle body. The opening is configured to receive oil mist therein blowby gas generated inside a crankcase of the engine. The baffle body is configured to be in fluid communication with the at least one opening. Thereby, the device is configured to perform gas-liquid separation of the blowby gas to retain liquid within the baffle body and allow gas to pass through.
In an embodiment, the device includes a lid portion in which the lid portion is configured to snap-fit on the baffle body to define the opening thereon. The lid portion has a hollow space for blowby gas circulation.
Further, the baffle body is configured with an elongated tube-shaped baffle. The baffle has an inlet portion and an outlet portion. The inlet portion of the baffle is configured with an arcuate ridge portion to guide and control the turbulency of the blowby gas. The outlet portion of the baffle is configured to be in communication with an air filter.
In an embodiment, the outlet portion of the baffle is configured with an abutting means.
In an embodiment, the predetermined length of the baffle is in the range of 10mm to 50mm and predetermined inner diameter of the baffle is in the range of 03mm to 20mmdepending on the capacity (cc: cubic centimeters) of the engine.
In an embodiment, the device includes at least one mounting hole to mount the device with the crankcase.
In an embodiment, the device is selected from a group of material consisting of composite material or polymers or combination thereof.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWING
A breather device for a combustion engine, of the present disclosure will now be described with the help of the accompanying drawing, in which:
Figure 1A illustrates a conventional breather plate arrangement mounted to a crankcase and Figure 1B illustrates an exploded view of the conventional breather plate with a crankcase.
Figure 2 illustrates a perspective isometric view of a breather device in accordance with an embodiment of the present disclosure;
Figure 3A illustrates perspective views of a lid and Figure 3B illustrates perspective views of a baffle body in accordance with an embodiment of the present disclosure; and
Figure 4 illustrates a perspective exploded view of a breather plate, a fastening means with a crankcase in accordance with an embodiment of the present disclosure.
LIST OF REFERENCE NUMERALS USED IN DETAILED DESCRIPTION AND DRAWING
100' breather device (conventional)
100 breather device
10 crankcase of a engine
12 lid portion
12a opening
14 baffle body
16 elongated tube-shaped baffle
16a inlet portion
16b outlet portion
16c arcuate ridge portion
18 air filter
20 fastening means
22 hole of crankcase
24 mounting hole of device
24a sub-mounting hole of lid portion
24b sub-mounting hole of baffle body
26 abutting means
DETAILED DESCRIPTION
Embodiments, of the present disclosure, will now be described with reference to the accompanying drawing.
Embodiments are provided so as to thoroughly and fully convey the scope of the present disclosure to the person skilled in the art. Numerous details are set forth, relating to specific components, and methods, to provide a complete understanding of embodiments of the present disclosure. It will be apparent to the person skilled in the art that the details provided in the embodiments should not be construed to limit the scope of the present disclosure. In some embodiments, well-known processes, well-known grader structures, and well-known techniques are not described in detail.
The terminology used, in the present disclosure, is only for the purpose of explaining a particular embodiment and such terminology shall not be considered to limit the scope of the present disclosure. As used in the present disclosure, the forms “a”, “an”, and “the” may be intended to include the plural forms as well, unless the context clearly suggests otherwise. The terms “comprises”, “comprising”, “including”, and “having”, are open ended transitional phrases and therefore specify the presence of stated features, integers, steps, operations, elements, modules, units and/or components, but do not forbid the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. The particular order of steps disclosed in the method and process of the present disclosure is not to be construed as necessarily requiring their performance as described or illustrated. It is also to be understood that additional or alternative steps may be employed.
When an element is referred to as being “mounted on”, “engaged to”, “connected to”, or “coupled to” another element, it may be directly on, engaged, connected or coupled to the other element. As used herein, the term “and/or” includes any and all combinations of one or more of the associated listed elements.
The terms first, second, third, etc., should not be construed to limit the scope of the present disclosure as the aforementioned terms may be only used to distinguish one element, component, region or section from another component, region, or section. Terms such as first, second, third etc., when used herein do not imply a specific sequence or order unless clearly suggested by the present disclosure.
Terms such as “inner”, “outer”, “beneath”, “below”, “lower”, “above”, “upper”, and the like, may be used in the present disclosure to describe relationships between different elements as depicted from the figures.
Typically, in a combustion engine mounted on a motorcycle, oil mist in the combustion engine is introduced into a breather to perform gas-liquid separation therein. Conventionally, a plate like breather device (100’) is used to perform the gas-liquid separation. However, the conventional plate like breather device (100’) directs the oil mist towards the air filter without much separation of oil traces from oil mist, which thereby increases the fuel consumption.
In order to address the aforementioned problems, the present disclosure envisages a breather device for a combustion engine (herein after referred as device 100). The breather device (100) is configured to be mounted within the crankcase (10). The outer shape of the device is configured in such a way that it is complimentary with the internal shape of the crankcase to thereby facilitates compact attachment of the device (100) within the crankcase (10). The breather device (100) comprises a lid portion (12) and a baffle body (14).
In an embodiment, the lid portion (12) is configured to be snap-fitted on the operative side of the baffle body (14) to form the breather device (100). The Lid portion (12) is provided with a sub mounting hole (24a) and the baffle body (14) is also provided with a sub mounting hole (24b). Therefore, when the lid portion (12) is snap fitted with the baffle body (14), a mounting hole (24) is formed to receive at least one fastening means (20) with a washer thereon. Thus, the breather device (100) is mounted to an operative portion of the crankcase (10) by means of the fastening means (20). The fastening means (20) is selected from a group of bolts Hex Flange of M6*20.
In another embodiment, the lid portion (12) is integrally made with the baffle body (14) to form the breather device (100). The device (100) is provided with a mounting hole (24) to receive a fastening means (20). Thus, the breather device (100) is mounted to an operative portion of the crankcase (10) by means of the fastening means (20). The fastening means (20) is selected from a group of bolts Hex Flange of M6*20.
The lid portion (12) is defined by a housing with a hollow space and is configured with at least one opening therein (12a). The opening (12a) is defined by a cutout provided at one of its operative side. The opening (12a) is configured to receive therein blowby gas generated inside a crankcase of the engine. The baffle body (14) is provided with an elongated tube-shaped baffle portion (16) with an inlet portion (16a) and an outlet portion (16b). The inlet portion (16a) of the baffle portion is configured with an arcuate ridge portion (16c) to guide and control the turbulency of the blowby gas. The outlet portion (16b) of the baffle is configured to be in communication an operative end of an air filter (18).
Advantageously, the hollow space provided within the lid portion facilitates sufficient time delay for the blowby gas or the oil mist to travel across the breather device so as to condense or separate maximum amount of liquid or oil from the blowby gas.
In an embodiment, the predetermined length of the baffle (16) is in the range of 10mm to 50mm and the predetermined inner diameter of the baffle (16) is in the range of 3mm to 20mm depending on the capacity (cc: cubic centimeters) of the engine. The length and the inner diameter of the baffle (16) may vary is accordance with the capacity of the engine.
Further, in an operative condition of the breather device (100), the blowby gas is received through the opening (12a) of the lid portion (12) and guided through the hollow space of the lid portion (12). Thereby, the blowby gas is allowed to pass through the inlet portion (16a) of the baffle towards the outlet portion (16b) of the baffle device (100). The breather device (100) is positioned in such a way that the baffle portion (16) is operatively oriented vertically and the inlet portion (16a) is located in operative downward direction and the outlet portion (16b) is located in operative upward direction of the baffle (16). Thus, the blowby gas travels through the baffle (16) from downward direction towards the upward direction. Generally, the blowby gas is a mixture of oil mist, therefore while travelling through the tube-shaped baffle (16), the liquid gets sticks to operative inner periphery of the baffle (16) and condense the gas to thereby facilitate blow out through the outlet portion (16b) of the baffle. Thus, the device facilitates the gas-liquid separation from the blowby gas within the predetermined length of the baffle (16). The condensed liquid which is oil is collected back with an oil sump which can be recirculated for further use. Advantageously, the condensed liquid helps in reduction of fuel consumption of the engine.
In an embodiment, the outlet portion (16b) of the baffle is configured with an abutting means (26). The abutting means (26) is selected from a group of surfaces consisting of a flat surface or a concave surface or a convex surface based on the matting operative surface of the crankcase (10). In a preferred embodiment, the abutting means (26) is a concave surface which mates with a corresponding surface of the crankcase (10). Thus, the abutting means (26) facilitates the smooth locking of the breather device (100) within the crankcase (10).
In an embodiment, the device is selected from a group of material consisting of composite material or polymers or combination thereof.
EXAMPLE:
In an exemplary embodiment, In first case the crankcase (10) is provided with the conventional plate like breather device (100’) and in second case the same crank case is provided with the breather device (100) in accordance with the present disclosure. It has been observed that average oil consumption in case of the conventional breather device is comparatively more as compared with the breather device of the present disclosure. Further, the blowby consumption in case of the conventional is also comparatively more than the breather device of the present disclosure.
The experimental result of the conventional breather device and the breather device of the present disclosure is tabulated below:
Type of breather device Avg. oil consump. Avg. Blowby consump.
Conventional plate like breather device 12.4 10.5
Breather device of the present disclosure 2.8 5.6
The foregoing description of the embodiments has been provided for purposes of illustration and not intended to limit the scope of the present disclosure. Individual components of a particular embodiment are generally not limited to that particular embodiment, but, are interchangeable. Such variations are not to be regarded as a departure from the present disclosure, and all such modifications are considered to be within the scope of the present disclosure.
TECHNICAL ADVANCEMENTS AND ECONOMIC SIGNIFICANCE
The present disclosure described herein above has several technical advantages including, but not limited to, the realization of the breather device for a combustion engine, that:
• effectively separate oil mist and facilitate air to escape through the air filter;
• reduces the oil consumption of the engine since the condensed oil on the baffle is collected back to oil sump;
• provides controlled air circulation;
• promotes scavenging effect;
• offers ease of assembly;
• is easy for maintenance;
• provides a space for the escape of gas;
• offers effective sealing of oil mist passage;
• facilitates smooth locking of the breather device within the crankcase; and
• facilitates compact attachment of the breather device within the crankcase.
The embodiments herein and the various features and advantageous details thereof are explained with reference to the non-limiting embodiments in the following description. Descriptions of well-known components and processing techniques are omitted so as to not unnecessarily obscure the embodiments herein.
The foregoing description of the specific embodiments so fully reveal the general nature of the embodiments herein that others can, by applying current knowledge, readily modify and/or adapt for various applications such specific embodiments without departing from the generic concept, and, therefore, such adaptations and modifications should and are intended to be comprehended within the meaning and range of equivalents of the disclosed embodiments. It is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation. Therefore, while the embodiments herein have been described in terms of preferred embodiments, those skilled in the art will recognize that the embodiments herein can be practiced with modification within the spirit and scope of the embodiments as described herein.
The use of the expression “at least” or “at least one” suggests the use of one or more elements or ingredients or quantities, as the use may be in the embodiment of the disclosure to achieve one or more of the desired objects or results.
While considerable emphasis has been placed herein on the components and component parts of the preferred embodiments, it will be appreciated that many embodiments can be made and that many changes can be made in the preferred embodiments without departing from the principles of the disclosure. These and other changes in the preferred embodiment as well as other embodiments of the disclosure will be apparent to those skilled in the art from the disclosure herein, whereby it is to be distinctly understood that the foregoing descriptive matter is to be interpreted merely as illustrative of the disclosure and not as a limitation.
, Claims:WE CLAIM:
1. A breather device (100) for a combustion engine, said device (100) configured to be disposed within a crankcase (10) of the engine, said device (100) comprising:
• at least one opening (12a) configured to receive blowby gas therein generated inside a crankcase of the engine;
• a baffle body (14) configured to be in fluid communication with said at least one opening (12a),
said device (100) is configured to retain liquid within said baffle body (14) from the blowby gas and allow gas to pass through.
2. The device (100) as claimed in claim 1, which include a lid portion (12) wherein said lid portion (12) is configured to snap-fit on said baffle body (14) to define said opening (12a) thereon.
3. The device (100) as claimed in claim 2, wherein said lid portion (12) is defining a hollow space between an inner operative portion of said lid portion (12) and an outer operative surface of said baffle body (14) to facilitate blowby gas circulation.
4. The device (100) as claimed in claim 1, wherein said baffle body (14) is configured with an elongated tube-shaped baffle (16) having an inlet portion (16a) and an outlet portion (16b).
5. The device (100) as claimed in claim 4, wherein said inlet portion (16a) of said baffle (16) is configured with an arcuate ridge portion (16c) to guide and control the turbulency of the blowby gas.
6. The device (100) as claimed in claim 4, wherein said outlet portion (16b) of said baffle (16) is configured to be in communication with an air filter (18).
7. The device (100) as claimed in claim 6, wherein said outlet portion (16b) of said baffle (16) is configured with a abutting means (26).
8. The device (100) as claimed in claim 4, wherein said baffle (16) is configured to condense the liquid from the blowby gas while passing through said tubular shaped baffle (16) and allow gas to pass-through in an operative condition of said device (100).
9. The device (100) as claimed in claim 4, wherein predetermined length of said baffle (16) is in the range of 10mm to 50mm and predetermined inner diameter of said baffle (16) is in the range of 3mm to 20mmdepending on the capacity (cc: cubic centimeters) of the engine.
10. The device (100) as claimed in claim 1, said device (100) is mounted operatively vertical within the crankcase (10).
11. The device (100) as claimed in claim 1, wherein an outer surface of said device (100) is complimentary to an inner surface of the crankcase (10).
12. The device (100) as claimed in claim 1, which include at least one mounting hole (24) to mount said device (100) with the crankcase (10).
13. The device (100) as claimed in claim 1, wherein said device (100) is selected from a group of material consisting of composite material or polymers or combination thereof.
Dated this 03rd day of April, 2023

_______________________________
MOHAN RAJKUMAR DEWAN, IN/PA – 25
of R.K.DEWAN & CO.
Authorized Agent of Applicant

TO,
THE CONTROLLER OF PATENTS
THE PATENT OFFICE, AT MUMBAI