CLIAMS:We claim:

1. A separator device (100) configurable in an engine head cover of an internal combustion engine for recirculation of blow-by gases of the internal combustion engine, the separator device (100) comprising:
at least one inlet port (101) fluidly connectable to the blow-by gases outlet of an engine crankcase;
a plurality of outlet ports (102 and 103), wherein,
at least one outlet port of the plurality of outlet ports (102 and 103) is fluidly connectable to an air intake channel (201) of the internal combustion engine, for supplying the blow-by gases to the air intake channel (201) when the internal combustion engine is working in a first operating zone; and
at least one outlet port of the plurality of outlet ports (102 and 103) is fluidly connectable to a power-booster (202) of the internal combustion engine for supplying the blow-by gases to the power-booster (202) when the internal combustion engine is working in a second operating zone; and
a plurality of baffles (104) provisioned in in a fluid separation passage (105) for separating oil from the blow-by gases.

2. The device (100) as claimed in claim 1 comprises an auxiliary passage (110) for selectively allowing the blow-by gases to flow to the power-booster (202) when the internal combustion engine is working in the second operating zone.

3. The device (100) as claimed in claim 1, wherein the first operating zone is an operation condition of the internal combustion engine in partial throttle condition.

4. The device (100) as claimed in claim 1, wherein the second operating zone is an operation condition of the internal combustion engine in full throttle condition.

5. A system (200) for recirculation of blow-by gases of an internal combustion engine, the system (200) comprising:
a separator device (100) configured in an engine head cover of the internal combustion engine, wherein the separator device (100) comprising:
at least one inlet port (101) fluidly connected to a blow-by gases outlet of an engine crankcase, wherein the at least one inlet port (101) is configured to receive mixture of blow-by gases and oil from the engine crankcase;
a plurality outlet ports (102 and 103) for recirculating the blow-by gases; and
a plurality of baffles (104) provisioned in the separator device (100) for separating the blow-by gases from oil before recirculation of the blow-by gases;
an air intake channel (201) communicating with one or more intake manifolds of the internal combustion engine, wherein the air intake channel (201) is fluidly connected to at least one first outlet port (102) of the plurality of outlet ports of the separation device (100) for receiving the blow-by gases to the air intake channel when the internal combustion engine is working in first operating zone; and
a power-booster (202) communicating with one or more intake manifolds of the internal combustion engine, wherein the power-booster (202) is fluidly connected to at least one second outlet port (103) of the plurality of outlet ports of the separation device for receiving the blow-by gases to the air intake channel when the internal combustion engine is working in second operating zone.

6. The system (200) as claimed in claim 5, wherein the power-booster (202) is at least one of a turbocharger and a supercharger.

7. The system (200) as claimed in claim 5, wherein the at least one second outlet port (103) of the plurality outlet ports of the separation device (100) is fluidly connected to a compressor air intake port (202a) of the power-booster (200).

8. The system (200) as claimed in claim 5, wherein the separator device (100) comprises a fluid separation passage (105) through which the blow-by gases are supplied to the plurality of outlets (102 and 103).

9. The system (200) as claimed in claim 5, wherein the separator device (100) comprises at least one oil drain port.

10. A method for recirculation of blow-by gases of an internal combustion engine, the method comprising acts of:
separating the blow-by gases from oil by passing a mixture of the blow-by gases and the oil received from an engine crankcase through a fluid separation passage (105) of a separation device (100), wherein a plurality of baffles (104) are provisioned in the separator device (100) for separating the blow-by gases from the oil; and
recirculating the blow-by gases to:
an air intake channel (201) when the internal combustion engine is working in first operating zone due to a vacuum created by air intake channel, wherein, at least one first outlet port (102) of the plurality of outlet ports of the separating device (100) is fluidly connected to the air intake channel of the internal combustion engine; and
a power-booster (202) when the internal combustion engine is working in second operating zone due to a vacuum created by the power-booster, wherein, at least one second outlet port (103) of the plurality of outlet ports of the separation device is fluidly connected to the power-booster of the internal combustion engine.

Dated this 11th Day of August, 2014 GOPINATH A.S.
IN/PA 1852
OF K&S PARTNERS
AGENT FOR THE APPLICANT

,TagSPECI:FORM 2
THE PATENTS ACT, 1970
(39 of 1970)
&
THE PATENTS RULES, 2003

COMPLETE SPECIFICATION
[See section 10 and rule 13]

TITLE:
“A SEPARATION DEVICE, SYSTEM AND METHOD FOR RECIRCULATION OF BLOW-BY GASES OF AN INTERNAL COMBUSTION ENGINE”

NAME AND ADDRESS OF THE APPLICANT:
TATA MOTORS LIMITED, an Indian company having its registered office at Bombay House, 24 Homi Mody Street, Hutatma Chowk, Mumbai 400 001, Maharashtra, INDIA.

Nationality: Indian

The following specification particularly describes the invention and the manner in which it is to be performed.
TECHNICAL FIELD

The present disclosure generally relates to an internal combustion engine. Particularly, but not exclusively, embodiments of the disclosure disclose separator devices used in recirculation systems for blow-by gases of the internal combustion engines.

BACKGROUND OF THE DISCLOSURE
In the internal combustion engines, when an air-fuel mixture is combusted in a combustion chamber, a small portion of the combusted gas may enter crankcase of the engine through piston rings. This gas is referred to as blow-by gas. Generally, to prevent this untreated gas from being directly vented into the atmosphere, a crankcase ventilation system is provided between the higher pressure crankcase and the lower pressure intake manifold to allow the blow-by gas to flow from the crankcase into the intake manifold and be mixed with fresh air. From here, the gas may be re-inducted into the combustion chamber for re-combustion.

Further, in the internal combustion engines lubrication oil is used to lubricate moving parts of the engine during normal engine operation. The high pressure in the crankcase causes some of the lubricating oil to be suspended in a mist form. This oil mist can then mix with the blow-by gas and be returned to the intake manifold for combustion via a communication passage. However, combustion of the oil may cause the net oil consumption to increase, as well as degrade engine emission quality. To address these issues, oil separators have been developed to separate the oil content from the blow-by gas containing the oil mist. After separation, the oil is returned to the engine lubricating system while the blow-by gas is returned to the engine intake system.

Conventionally, oil separators are provided external to the internal combustion engine. The blow-by mixture containing the oil mist, and blow-by gases, are passed through the oil separation chamber in which the oil is separated from the blow-by gases. The external oil separator circuits are connected to the engine via a plurality of lengthy hose which are usable for their intended purposes. However, the provision of external oil separators along with the lengthy hoses resulting in complex packaging of engines in the vehicle. Hence, a need still exists for a compact and simple engine packaging.

In light of the foregoing discussion, it is necessary to develop a separator device for recirculation of blow-by gases to overcome the one or more problems stated above.

SUMMARY OF THE DISCLOSURE

The shortcomings of the prior art are overcome and additional advantages are provided through the provision of system as claimed in the present disclosure.

Additional features and advantages are realized through the techniques of the present disclosure. Other embodiments and aspects of the disclosure are described in detail herein and are considered a part of the claimed disclosure.

In one non-limiting embodiment of the present disclosure there is provided a separator device configurable in an engine head cover of an internal combustion engine for recirculation of blow-by gases of the internal combustion engine. The separator device comprises at least one inlet port fluidly connectable to the blow-by gases outlet of an engine crankcase. A plurality of outlet ports are provided in the separation device in which at least one outlet port of the plurality of outlet ports is fluidly connectable to an air intake channel of the internal combustion engine, for supplying the blow-by gases to the air intake channel when the internal combustion engine is working in a first operating zone, and at least one outlet port of the plurality of outlet ports is fluidly connectable to a power-booster of the internal combustion engine for supplying the blow-by gases to the power-booster when the internal combustion engine is working in a second operating zone. Further, a plurality of baffles provisioned in the separator device for separating oil in the blow-by gases.

In an embodiment of the present disclosure the separator device comprises at least one oil drain port fluidly connectable to an oil inlet port of the engine crankcase.

In an embodiment of the present disclosure the separator device is configurable in an engine head cover of the internal combustion engine.

In an embodiment of the present disclosure, the plurality of baffles is provisioned in a fluid separation passage of the separator device.

In another non-limiting embodiment of the present disclosure there is provided a system for recirculation of blow-by gases of an internal combustion engine. The system comprises a separator device configured in an engine head cover of the internal combustion engine. The separator device comprises at least one inlet port fluidly connected to a blow-by gases outlet of an engine crankcase, wherein the at least one inlet port is configured to receive mixture of blow-by gases and oil from the engine crankcase. A plurality outlet ports for recirculating the blow-by gases; and a plurality of baffles provisioned in the separator device for separating the blow-by gases from oil before recirculation of the blow-by gases. Further, the system comprises an air intake channel communicating with one or more intake manifolds of the internal combustion engine, wherein the air intake channel is fluidly connected to at least one first outlet port of the plurality of outlet ports of the separation device for receiving the blow-by gases to the air intake channel when the internal combustion engine is working in a first operating zone. A power-booster communicating with one or more intake manifolds of the internal combustion engine is provided in the system. The power-booster is fluidly connected to at least one second outlet port of the plurality of outlet ports of the separation device for receiving the blow-by gases to the air intake channel when the internal combustion engine is working in a second operating zone.

In an embodiment of the present disclosure, the power-booster is at least one of a turbo-charger and a super charger. The second outlet port of the plurality outlet ports of the separation device is fluidly connected to a compressor air intake port of the power-booster.

In an embodiment of the present disclosure, the separator device comprises a fluid separation passage through which the blow-by gases are supplied to plurality of outlets.

In an embodiment of the present disclosure, the separator device comprises at least one oil drain port. Further, at least one oil filtration unit fluidly connected in between at least one oil drain port of the separator device and an oil inlet port of the engine crankcase.

In yet another non-limiting embodiment of the present disclosure there is provided a method for recirculation of blow-by gases of an internal combustion engine. The method comprising acts of separating the blow-by gases from oil by passing a mixture of the blow-by gases and the oil received from an engine crankcase through a fluid separation passage of a separation device, wherein a plurality of baffles are provisioned in the separator device for separating the blow-by gases from the oil. Then, recirculating the blow-by gases to: an air intake channel when the internal combustion engine is working in first operating zone due to a vacuum created by air intake channel, wherein, at least one first outlet port of the plurality of outlet ports of the separating device is fluidly connected to the air intake channel of the internal combustion engine; and a power-booster when the internal combustion engine is working in a second operating zone due to a vacuum created by the power-booster, wherein, at least one second outlet port of the plurality of outlet ports of the separation device is fluidly connected to the power-booster of the internal combustion engine.

In an embodiment of the present disclosure the method comprises act of draining the oil collected in the separation unit through an oil drain port. The oil from the oil drain port is recirculated to an engine crankcase.

It is to be understood that the aspects and embodiments of the disclosure described above may be used in any combination with each other. Several of the aspects and embodiments may be combined together to form a further embodiment of the disclosure.

The foregoing summary is illustrative only and is not intended to be in any way limiting. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features will become apparent by reference to the drawings and the following detailed description.

OBJECTIVES OF THE DISCLOSURE

One object of the present disclosure is to provide a separator device configurable in an engine head cover of an internal combustion engine used in recirculation systems for blow-by gases of internal combustion engines, which can be mounted on an engine head cover/tappet cover.

One object of the present disclosure is to provide a separator device configurable in an engine head cover of an internal combustion engine used in recirculation systems for blow-by gases of internal combustion engines, which is in simple in construction, and easy to assemble.

One object of the present disclosure is to provide a separator device configurable in an engine head cover of an internal combustion engine used in recirculation systems for blow-by gases of internal combustion engines, which has lesser number of parts and sealing joints.

One object of the present disclosure is to provide a separator device configurable in an engine head cover of an internal combustion engine used in recirculation systems for blow-by gases of internal combustion engines, in which the blow-by gases are supplied to at least one of intake manifold and power booster based on throttle condition of the engine.

BRIEF DESCRIPTION OF THE ACCOMPANYING FIGURES

The novel features and characteristic of the disclosure are set forth in the appended claims. The disclosure itself, however, as well as a preferred mode of use, further objectives and advantages thereof, will best be understood by reference to the following detailed description of an illustrative embodiment when read in conjunction with the accompanying figures. One or more embodiments are now described, by way of example only, with reference to the accompanying figures wherein like reference numerals represent like elements and in which:

FIG. 1 illustrates a rear perceptive view of engine head cover equipped with a separation device according to an embodiment of the present disclosure.

FIG. 2 illustrates a perceptive view of a bottom plate of a separation device provisioned with oil drain ports according to an embodiment of the present disclosure.

FIGS. 3a and 3b illustrates schematic representation of the separation device in which the blow-gases are supplied to intake manifold and a pressure-booster respectively, according an embodiment of the present disclosure.

FIG. 4 illustrates schematic representation of a system for recirculation of blow-by gases of an internal combustion engine according an embodiment of the present disclosure.

The figures depict embodiments of the disclosure for purposes of illustration only. One skilled in the art will readily recognize from the following description that alternative embodiments of the structures and methods illustrated herein may be employed without departing from the principles of the disclosure described herein.

DETAILED DESCRIPTION
The foregoing has broadly outlined the features and technical advantages of the present disclosure in order that the detailed description of the disclosure that follows may be better understood. Additional features and advantages of the disclosure will be described hereinafter which form the subject of the claims of the disclosure. It should be appreciated by those skilled in the art that the conception and specific embodiment disclosed may be readily utilized as a basis for modifying or designing other structures for carrying out the same purposes of the present disclosure. It should also be realized by those skilled in the art that such equivalent constructions do not depart from the spirit and scope of the disclosure as set forth in the appended claims. The novel features which are believed to be characteristic of the disclosure, both as to its organization and method of operation, together with further objects and advantages will be better understood from the following description when considered in connection with the accompanying figures. It is to be expressly understood, however, that each of the figures is provided for the purpose of illustration and description only and is not intended as a definition of the limits of the present disclosure.

To overcome the drawbacks mentioned in the background, the present disclosure provides a separator device for recirculation or a system for recirculation of the blow-by gases of an internal combustion engine. The separator device of the present disclosure can be configured in an engine head cover alternatively referred as tappet cover. The separator device broadly comprises an intake port, separation passage, and a plurality of outlet ports. The intake port of the separation device is adapted to be fluidly connected to a vent hole of a crankcase of the engine for receiving a mixture of blow-by gases and oil mist from the crankcase. Then, the mixture is passed through a separation passage consisting of a plurality of baffles. The mixture of blow-by gases and oil mist hits the baffles thereby the blow-by gases will get separated from the oil in the separation passage. The separated blow-by gases will be recirculated to combustion chamber of the internal combustion engine through a plurality of outlet ports. In an embodiment of the present disclosure, the one outlet port of the separation unit is connectable to an air intake line of the internal combustion engine, and other outlet is fluidly connectable to a power booster air intake line of the internal combustion engine. The blow-by gases form the separator device will go to at least one of the air intake line and the power booster based on the operating zone of the engine i.e. engine throttle opening condition.

In an embodiment of the disclosure there is also provided a system for recirculation of blow-by gases of the internal combustion engine. The system broadly comprises a separation device, air intake line and a power booster. The separation device is configured in an engine head cover alternatively referred as tappet cover as an internal assembly of the engine. The separator device is configured to receive a mixture of blow by gases along with oil mist from the crank case, and separate the blow-by gases from oil particles before recirculating the blow-by gases to a combustion chamber. Further, the air intake line of the internal combustion engine is fluidly connected to one outlet port of the separation device for receiving a blow-by gases form the separation device when the engine is working in a first operating zone. Also, an air intake line of the power booster is fluidly connected to other outlet port of the separation device for receiving a blow-by gases form the separation device when the engine is working in second operating zone. In an embodiment of the present disclosure, the blow-by gases are supplied to either engine air intake line and the power booster due to vacuum created during the operation.

The term “First operating zone” of the engine as used herein above and below is referred to operation condition of the engine in naturally aspirated condition (i.e. zero to partial throttle condition). The first operating zone of the internal combustion engine is also referred to as non-boosted zone. In a first operating zone, air or an air/fuel mixture for combustion is drawn into the engines cylinders by atmospheric pressure acting against a partial vacuum that occurs as the piston travels downwards toward bottom dead centre during the intake stroke.

Further, the term “second operating zone” of the engine as used herein above and below is referred to operation condition of the engine in boost pressure condition, (partial to full throttle open condition). The second operating zone of the internal combustion engine is also referred to as boosted zone. In second operating zone, air for combustion is forced into the engines cylinders by a pressure booster, such as turbocharger or supercharger during the intake stroke.

Reference will now be made to figures which are exemplary embodiments of the present disclosure, as illustrated in the accompanying drawings. Where ever possible referral numerals will be used to refer to the same or like parts.

FIG. 1 is an exemplary embodiment of the present disclosure which illustrates a separation device (100) for a system for recirculation of blow-by gases of the internal combustion engine (not shown). The separation device (100) is used in the internal combustion engine for separating liquid particles such as but not limiting to oil mist from the gaseous particles such as blow-by gases before recirculating the blow-by gases to a combustion chamber of the engine. In an embodiment of the present disclosure, the separation device (100) can be configurable on top of an engine head, which will make the internal combustion engine compact, and minimises packaging constraints in the engine bay.

As shown in FIG. 1 the separation device (100) comprises an inlet port (101) fluidly connectable to a vent hole also referred as blow-by gas outlet (not shown) of an engine crankcase. The separation device (100) is configured to receive blow-by gases collected in the crankcase along with oil mist through the inlet port (101). A separation passage (105) is provided in the separator device (100). In an embodiment, the separation passage (105) is configured along the length of the separation device (100). The separation passage (105) is provided with a plurality of baffles (104) for separating oil particles from the blow-by gases. In an embodiment of the disclosure, the baffles are provisioned in either sides (105a and 105b) of the separation passage (105). The baffles (104) are supported by a plate like members runs along the length of the separation passage (105) in either sides (105a and 105b). In an embodiment of the disclosure, the baffles (104) are formed as integral to the components plate like members. In alternative embodiment, the baffles (104) are fixed to plate like members through at least one of fastening, welding, brazing and any other metal joining which severs the purpose. When, the mixture of oil mist and the blow-by gases is passed through a separation passage (105), the mixture hits the baffles (104) thereby the blow-by gases will get separated from the oil in the separation passage (105). The separated oil will be collected in the separation device (100), and the separated blow by gases will be recirculated to combustion chamber of the internal combustion engine. For recirculating the blow-by gases to the combustion chamber (not shown) a plurality of outlet ports (102 and 103) are provided in the separation device (100). In an embodiment of the present disclosure, the at least one outlet port (102) of the separation unit (100) is fluidly connectable to an air intake line (201) of the internal combustion engine, and other outlet (103) is fluidly connectable to a power booster air intake line (202a) of the internal combustion engine. The blow-by gases form the separator device (100) will be supplied to at least one of the air intake line and the power booster based on the engine throttle opening condition.

FIG. 2 is an exemplary embodiment of the present disclosure which illustrates perspective bottom plate (106) of the separation device (100) with oil drain ports (107). As shown in the FIG. 2 the bottom plate (106) of the separation device (100) is provisioned with one or more oil drain ports 107a, 107b, 107c…107n (collectively referred as 107) for draining the oil accumulated in the separation device. The one-or more oil drainage ports (107) are fluidly connectable to an oil inlet port of the engine crankcase (not shown) for recirculating the oil into the crankcase. Since, the oil drain port is provided in the separation device (100) which is configurable in an engine head cover helps to recirculate oil back to the crankcase with fluid supply mediums such as but not limiting to tubes and hoses of shorter length. This will help to minimize the packaging constraints in the engine-bay.

FIGS. 3a and 3b are exemplary embodiments of the present disclosure illustrating schematic representations of the separation device (100) in which the blow-gases are supplied to intake manifold (201) and a pressure-booster (202) respectively. The blow-by gases which are separated in the separation passage (105) will be passed to either one of intake manifold (201) or the super charger (202) though the plurality of outlet ports (102 and 103) based on the engine operation condition.

As shown in FIG. 3a when engine is operating in a first operating zone i.e. in naturally aspirated condition, the blow-by gases which are separated from the oil in the separation device (100) will be supplied to engine air intake line (201) through the at least one outlet port (102) of the plurality of outlet ports (102 and 103) of the separation device (100). During operation in the first operating zone of the engine, the blow-by gases will pass to the air intake line (201) due to vacuum created in the intake line during suction stroke of the engine. Further, when engine is operating in a second operating zone i.e. in boost pressure condition, the blow-by gases which are separated from the oil in the separation device (100) will be supplied to air intake line (202a) [shown in FIG. 4] of a pressure booster through the at least one outlet port (103) of the plurality of outlet ports (102 and 103) of the separation device (100) as shown in FIG. 3b. During working in second operating zone, of the engine, the blow-by gases will pass to the air intake line (202a) [shown in FIG. 4] of a pressure booster (202) due to vacuum created in the air intake line (202a) of the pressure booster during operation of a compressor in the pressure booster.

As an exemplary embodiment of the present disclosure FIG. 4 illustrates schematic representation of a system (200) for recirculation of blow-by gases of an internal combustion engine which is employed with the separation device (100) as described in the present disclosure. As shown in the FIG. 4 the system (200) employs the separation device (100) in an engine head cover (203) which is alternatively refereed as tappet cover. In an embodiment of the present disclosure, the separation device (100) is integrated in the engine head cover (203). Since the separation device (100) is integrated in the engine head cover (203) the separation device (100) can be called as an internal separation circuit for the recirculation of blow-by gases of the internal combustion engine (not shown). The provision of internal separation circuit for separating the blow-by gases from the oil mist before recirculating to the combustion chamber of the engine helps to transfer the blow-by gases with lesser number of parts and short length pipes/hoses. This minimizes space consumed by the engine in the engine bay, thereby minimizes packaging constraints of the engine.

As shown in the FIG. 4 the system (200) comprise of a separation device (100) which is configured in an engine head cover (203) alternatively referred as tappet cover as an internal assembly of the engine. The separator device (100) comprise of an inlet port (101) which is fluidly connected to a vent hole (not shown) also called as blow-by gas outlet port of an engine crankcase. The inlet port (101) is configured to receive a mixture of blow by gases along with oil mist from the crank case, and separate the blow-by gases from oil particles before recirculating the blow-by gases to a combustion chamber. For separation of blow-by gases from the oil mist, the mixture received form the inlet port (101) is passed through a separation passage (105). The separation passage is provisioned with a plurality of baffles (104) to provide a unidirectional passage for blow-by gases. In an embodiment of the present disclosure, the plurality of baffles (104) is formed by casting the baffles in the engine head cover (203). Further, in an embodiment the baffles are arranged in in a zigzag manner in the separation passage, and are tightly sealed using a paper gasket. However, the person skilled in the art may arrange the baffles (104) in any other manner and seal using any other gasket which sever the purpose.

When the mixture of blow-by gases and the oil mist are passed through the separation passage (105), the oil will settle in the separation device (100), whereas the separated blow-by gases will pass towards a plurality of outlet ports (102 and 103) of the separation device. In an embodiment, the internal separation circuit is divided into two different circuits which operate at different operating zones (throttle conditions) namely first operating zone and second operating zone, in which one separation circuit [shown in FIG. 3a] operates at first operating zone using vacuum from intake manifold, while the other separation circuit (second operating zone) [shown in FIG. 3b] operates using vacuum from pressure booster.

Further, the system (200) comprises an air intake channel (201) communicating with one or more intake manifolds (204) of the internal combustion engine. The air intake manifold (204) is configured to supply air required for combustion in the internal combustion engine when the engine is operating in naturally aspirated condition (first operating zone). The air intake channel (201) is fluidly connected to at least one first outlet port (102) of the plurality of outlet ports (102 and 103) of the separation device (100). In an embodiment of the present disclosure, the air intake channel is connected to the first outlet port (102) through a Pressure Control Valve (PCV) for receiving the blow-by gases to the air intake channel when the internal combustion engine is working in naturally aspirated condition. In the naturally aspirated condition (first operating zone), the vacuum created in the air intake line during suction stroke of the engine sucks the blow-by gases from the separation device (100) for the combustion.

The system (200) further comprises a power-booster (202) communicating with one or more intake manifolds of the internal combustion engine, through an intercooler (not shown). In an embodiment of the disclosure, the power booster (202) is at least one of but not limiting to turbocharger and the supercharger. The power booster (202) will be provided in the internal combustion engine to supply boost air to the engine intake manifold (204) for improving the power generated by the engine. The power booster will generally comprise of an air compressor driven by at least one of turbine and drive mechanism. The air compressor (not shown) compress the air received from air intake line (202a) before supplying to the intake manifold (204) through an intercooler (not shown), this helps to supply the compressed air to the combustion chamber, to improve the power generated by the internal combustion engine. In the system (200) the air intake line (202a) of the power-booster (202) is fluidly connected to at least one second outlet port (103) of the plurality of outlet ports (102 and 103) of the separation device (100), through a Pressure Control Valve (not shown). In an embodiment of the present disclosure, the air intake line (202a) of the power-booster (202) is connected to the second outlet port (103) through pipes /hose of shorter length for receiving the blow-by gases to the compressor of the power booster (202) when the internal combustion engine is working in second operating zone. In the second operating zone (boosted zone), the vacuum created in the air intake line (202a) is due to operation of the compressor of the power booster, thus the blow-by gases from the separation device (100) will be sucked by the compressor through the air intake line (202a) and will be supplied to combustion chamber along with the compressed air for the combustion.

Further, the system (200) comprises at least one oil filtration unit (not shown) fluidly connected in between at least one oil drain port (107) of the separator device (100) and an oil inlet port (not shown) of the engine crankcase for recirculating the oil collected in the separation device (100) to the engine crankcase. The oil filtration unit is used to filter the oil collected in the separation device (100) from the foreign particles such as dust and other fluid particles before recirculating the oil to the crankcase. In the system (200) any oil filtration unit which is known in the art can be used to filter the oil.

As shown in the FIG. 4 the first outlet (102) of the separation device (100) is provided in the end which is located close to the air intake manifold (204), and the second outlet (103) of the separation device (100) is provided in the other end which is located close to the power booster (202). The provision of first and second outlets (102 and 103) close to the air intake manifold (204) and the power booster (202) respectively helps to pass the blow-by gases to combustion chamber with shorter pipes/hoses, thereby eliminates the use of longer hoses. This helps minimize the packaging constraints of the engine in the engine bay, thereby ensuing no interaction of the separation device (100) with the surrounding components and high temperature. However, the provision of first and second outlets (102 and 103) close to the air intake manifold (204) and the power booster (202) should not be construed as limitation to the present disclosure. The person skilled in the art may provide outlets (102 and 103) in any other desired location of the separation device (100).

Further, for the purpose of simplicity only two outlet ports of the separation device are shown in the figures, and hence the same should not be construed as limitation to the disclosure. The person skilled in the art may provide any number of outlets in the separation device. Also, for the purpose of simplicity only one outlet form the separation device is connected to air intake line and the pressure booster. However, it is understood that more than one outlet of the separation unit may be connected to each of the air intake line and the pressure booster.

Additionally, advantages of present disclosure are illustrated herein.
The present disclosure provides a separator device configurable in an engine head cover of an internal combustion engine used in recirculation systems for blow-by gases of internal combustion engines, which can be mounted on an engine head cover/tappet cover. This minimises packaging space of the engine in the vehicle, and also avoids, minimises number of parts.

The present disclosure provides a separator device configurable in an engine head cover of an internal combustion engine used in recirculation systems for blow-by gases of internal combustion engines, which is in simple in construction, and easy to assemble.

The present disclosure provides a separator device configurable in an engine head cover of an internal combustion engine used in recirculation systems for blow-by gases of internal combustion engines, which has lesser number of parts and sealing joints.

The present disclosure provides a separator device configurable in an engine head cover of an internal combustion engine used in recirculation systems for blow-by gases of internal combustion engines, in which the blow-by gases are supplied to at least one of intake manifold and power booster based on throttle condition of the engine.

Equivalents:

With respect to the use of substantially any plural and/or singular terms herein, those having skill in the art can translate from the plural to the singular and/or from the singular to the plural as is appropriate to the context and/or application. The various singular/plural permutations may be expressly set forth herein for sake of clarity.

It will be understood by those within the art that, in general, terms used herein, and especially in the appended claims (e.g., bodies of the appended claims) are generally intended as "open" terms (e.g., the term "including" should be interpreted as "including but not limited to," the term "having" should be interpreted as "having at least," the term "includes" should be interpreted as "includes but is not limited to," etc.). It will be further understood by those within the art that if a specific number of an introduced claim recitation is intended, such an intent will be explicitly recited in the claim, and in the absence of such recitation no such intent is present. For example, as an aid to understanding, the following appended claims may contain usage of the introductory phrases "at least one" and "one or more" to introduce claim recitations. However, the use of such phrases should not be construed to imply that the introduction of a claim recitation by the indefinite articles "a" or "an" limits any particular claim containing such introduced claim recitation to inventions containing only one such recitation, even when the same claim includes the introductory phrases "one or more" or "at least one" and indefinite articles such as "a" or "an" (e.g., "a" and/or "an" should typically be interpreted to mean "at least one" or "one or more"); the same holds true for the use of definite articles used to introduce claim recitations. In addition, even if a specific number of an introduced claim recitation is explicitly recited, those skilled in the art will recognize that such recitation should typically be interpreted to mean at least the recited number (e.g., the bare recitation of "two recitations," without other modifiers, typically means at least two recitations, or two or more recitations). Furthermore, in those instances where a convention analogous to "at least one of A, B, and C, etc." is used, in general such a construction is intended in the sense one having skill in the art would understand the convention (e.g., "a system having at least one of A, B, and C" would include but not be limited to systems that have A alone, B alone, C alone, A and B together, A and C together, B and C together, and/or A, B, and C together, etc.). In those instances where a convention analogous to "at least one of A, B, or C, etc." is used, in general such a construction is intended in the sense one having skill in the art would understand the convention (e.g., "a system having at least one of A, B, or C" would include but not be limited to systems that have A alone, B alone, C alone, A and B together, A and C together, B and C together, and/or A, B, and C together, etc.). It will be further understood by those within the art that virtually any disjunctive word and/or phrase presenting two or more alternative terms, whether in the description, claims, or drawings, should be understood to contemplate the possibilities of including one of the terms, either of the terms, or both terms. For example, the phrase "A or B" will be understood to include the possibilities of "A" or "B" or "A and B."

While various aspects and embodiments have been disclosed herein, other aspects and embodiments will be apparent to those skilled in the art. The various aspects and embodiments disclosed herein are for purposes of illustration and are not intended to be limiting, with the true scope and spirit being indicated by the following claims.

Referral Numerals:

Reference Number Description
100 Separator device
101 Intake port of the separator device
102 and 103 Plurality of outlet ports of the separator device
104 Baffles
105 Separation passage
105a and 105b Walls of the separation passage
106 Bottom plate
107 Drain ports
200 System for recirculation of blow-by gases
201 Air intake channel
202 Power booster
202a Air intake line of the power booster
203 Engine head cover
204 Intake manifold