Claims:We claim:
1. An oil separator (100) for an engine (10), the oil separator (100) comprising:
a separator plate (1) configured to an engine head (7) and comprising at least one baffle plate (2), wherein the at least one baffle plate (2) permits blow-by gases (4) to flow through at a predetermined velocity;
at least one filter plate (3) configured to an engine head cover (5) and assembled adjacent to the at least one baffle plate (2), wherein the at least on filter plate (3) separates oil (6) from the blow-by gases (4) when the blow-by gases (4) impinges on the at least one filter plate (3);
at least one inlet port (8) configured on the engine head (7) for inletting the blow-by gases (4) from an engine crankcase (11) on to the oil separator (100), and
at least one drain port (9) connected to the separator plate (1) to drain the oil (6) into the engine crankcase (11).

2. The oil separator (100) as claimed in claim 1, wherein the at least one baffle plate (2) is configured along width of the separator plate (1).

3. The oil separator (100) as claimed in claim 1, wherein the at least one baffle plate (2) is configured with plurality of through holes (12) to allow the blow-by gases (4) to pass through.

4. The oil separator (100) as claimed in claim 1, wherein the engine head cover (5) is configured with an air-inlet port fluidly connected with intake manifold of the engine (10).

5. The oil separator (100) as claimed in claim 4, wherein the blow-by gases (4) separated from oil (6) is routed to the intake manifold of the engine (10) via the air-inlet port.

6. The oil separator (100) as claimed in claim 1, wherein each of the at least one filter plate (3) is configured with plurality of splines (13) to direct oil (6) separated from the blow-by gases (4) to the engine crankcase (11).

7. The oil separator (100) as claimed in claim 1, comprises at least one opening (14) configured at bottom ends of the at least one baffle plate (2), to route the oil (6) separated from the blow-by gases (4) to the at least one drain port (9).

8. The oil separator (100) as claimed in claim 1, wherein the separator plate (1), the at least one baffle plate (2), the at least one filter plate (3) and the engine head cover (5) are manufactured from aluminium.

9. The oil separator (100) as claimed in claim 1, wherein the separator plate (1), the at least one baffle plate (2), the at least one filter plate (3) and the engine head cover (5) are manufactured from plastic.

10. The oil separator (100) as claimed in claim 1, wherein the separator plate (1), the at least one baffle plate (2), the at least one filter plate (3) and the engine head cover (5) are manufactured from combinations of plastic and aluminium.

11. A method for separating oil (6) from blow-by gases (4) by an oil separator (100), the method comprising acts of:
routing the blow-by gases (4) from an engine crankcase (11) on to the oil separator (100) via at least one inlet port (8) configured on an engine head (7);
separating oil (6) from the blow-by gases (4), by impinging the blow-by gases (4) on at least one filter plate (3) configured to the engine head cover (5) and assembled adjacent to each of the at least one baffle plate (2); and
routing the oil (6) to the engine crankcase (11) via at least one drain port (9);

12. The method as claimed in claim 11 comprises act of routing the oil (6) separated at the at least one filter plate (3) to the at least one drain port (9) via at least one opening (14) configured at bottom ends of at least one baffle plate (2).
, Description:TECHNICAL FIELD

The present disclosure relates to internal combustion engine. Particularly, but not exclusively, embodiments of the present disclosure discloses oil separator in an engine head cover used for separation of oil in blow-by gas of the internal combustion engines.

BACKGROUND OF THE DISCLOSURE

In an internal combustion engine, air-fuel mixture is delivered to a combustion chamber by an intake manifold assembly. The air-fuel mixture is compressed and ignited in the combustion chamber, so as to move the piston and finally developing power. The power generated in the internal combustion engine, is transferred to crankshaft for utilization of the power. On the periphery of the piston, multiple piston rings are configured to act as a seal between wall of engine cylinder and the piston. The seal prevents combustion gases from entering the crankcase of the engine block. Additionally, the piston rings prevent oil in the engine crankcase from entering the combustion side of the combustion chamber. However, due to the high pressure of combustion gases, generated during the combustion process, some combustion gases pass through the piston rings and enter into the engine crankcase. These gases which escape into the engine crankcase are called as blow-by gases. Entry of combustion gases into the engine crankcase results in pressure increase within the engine crankcase and these combustion gases mixes with oil in the engine crankcase. Mixing of combustion gases with the oil, degrades the oil and pressure generated within the combustion chamber leading to loss of power.

Conventionally and in order to mitigate the above mentioned shortcomings, crankcase ventilation systems are incorporated. The crankcase ventilation systems include a positive crankcase ventilation (PCV) valve positioned in the intake manifold which fluidly connects the engine crankcase. The PCV valves induce a vacuum pressure at the intake manifold, thereby drawing the blow-by gases from the engine crankcase. The drawn blow-by gases are routed to the combustion chamber for combustion. However, the blow-by gases routed to the combustion chamber includes fractions of oil carried over from the engine crankcase. Combustion of the blow-by gases in the combustion chamber will result in loss of performance of the engine and thus its efficiency is reduced.

Therefore to reduce such inefficiencies, oil separators are configured within the internal combustion engine, predominantly external to the internal combustion engine. The oil separators are in fluid communication with the engine crankcase and the intake manifold, so that the purified blow-by gases are inlet into the combustion chamber. Also, the external oil separators are fluidly connected to ports of the engine via lengthy hoses. The use of lengthy hoses makes the system complex and also imposes packaging restraints in the engine bay. Inherently making the engine more cumbersome and incurs higher maintenance.

In the light of the foregoing discussion, there is a need for developing an oil separator which overcomes one or more limitations stated above.

SUMMARY OF THE DISCLOSURE

One or more shortcomings of the prior art are overcome and additional advantages are provided through a system and a method of 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 disclosure.

In one non-limiting embodiment of the present disclosure, an oil separator for an engine is disclosed. The oil separator comprises a separator plate configured to an engine head and comprising at least one baffle plate. The at least one baffle plate permits blow-by gases to flow through at a predetermined velocity. At least one filter plate is configured to an engine head cover and assembled adjacent to the at least one baffle plate. The at least one filter plate separates oil from the blow-by gases when the blow-by gases impinges on the at least one filter plate. Also, the oil separator comprises at least one inlet port configured on the engine head for inletting the blow-by gases from an engine crankcase on to the oil separator. Further, at least one drain port is connected to the separator plate to drain the oil into the engine crankcase.

In one embodiment, the at least one baffle plate is configured along width of the separator plate.

In one embodiment, the at least one baffle plate is configured with plurality of through holes to allow the blow-by gases to pass through.

In one embodiment, the engine head cover is configured with an air-inlet port fluidly connected to an intake manifold of the engine.

In one embodiment, the oil separated from the blow-by gases is routed to the intake manifold of the engine via the air-inlet port.

In one embodiment, each of the at least one filter plate is configured with plurality of splines to direct oil separated from the blow-by gases to the engine crankcase.

In one embodiment, at least one opening configured at bottom end of the at least one baffle plate, to route the oil separated from the blow-by gases to the at least one drain port.

In an embodiment the separator plate, the at least one baffle plate, the at least one filter plate and the engine head cover are manufactured from aluminium.

In an embodiment the separator plate, the at least one baffle plate, the at least one filter plate and the engine head cover are manufactured from plastic.

In an embodiment the separator plate, the at least one baffle plate, the at least one filter plate and the engine head cover are manufactured from combinations of plastic and aluminium.

In one embodiment, a method for separating oil from blow-by gases by an oil separator is disclosed. The method comprising acts of routing the blow-by gases from an engine crankcase on to the oil separator via at least one inlet port configured on an engine head. Separating oil from the blow-by gases, by impinging the blow-by gases on at least one filter plate configured to the engine head cover and assembled adjacent to each of the at least one baffle plate. Lastly, the method comprises act of routing the oil to the engine crankcase via a drain port.

In an embodiment, the method comprises acts of routing the oil separated at the at least one filter plate to the drain port via at least one opening configured at bottom ends of at least one baffle plate.

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.

BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS

The novel features and characteristics of the disclosure are set forth in the appended description. 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:

Figure 1 illustrates sectional view of the oil separator assembled on an engine head in one exemplary embodiment of the present disclosure.

Figure 1a illustrates front view of the at least one inlet port of the oil separator in one exemplary embodiment of the present disclosure.

Figure 1b illustrates front view of the oil separator in one exemplary embodiment of the present disclosure.

Figure 1c illustrates top view of the oil separator in one exemplary embodiment of the present disclosure.

Figure 1d illustrates front view of the non-return valve of the oil separator in one exemplary embodiment of the present disclosure.

Figure 2 illustrates perspective view of separator plate of the oil separator in one exemplary embodiment of the present disclosure.

Figure 3 illustrates perspective view of the oil separator in one exemplary embodiment of the present disclosure.

It should be appreciated by those skilled in the art that any diagrams herein represent conceptual views of illustrative systems embodying the principles of the present subject matter.

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 oil separator illustrated herein may be employed without departing from the principles of the disclosure described herein.

DETAILED DESCRIPTION OF THE DISCLOSURE

While the embodiments in the disclosure are subject to various modifications and alternative forms, specific embodiment thereof has been shown by way of example in the figures and will be described below. It should be understood, however that it is not intended to limit the disclosure to the particular forms disclosed, but on the contrary, the disclosure is to cover all modifications, equivalents, and alternative falling within the scope of the disclosure.

It is to be noted that a person skilled in the art would be motivated from the present disclosure and modify the oil separator to separate oil in the blow-by gases outlet from engine crankcase. However, such modification should be construed within the scope of the disclosure. Accordingly, the drawings show only those specific details that are pertinent to understand the embodiments of the present disclosure so as not to obscure the disclosure with details that will be readily apparent to those of ordinary skill in the art having benefit of the description herein.

The terms “comprises”, “comprising”, or any other variations thereof used in the disclosure, are intended to cover a non-exclusive inclusion, such that a method, system, assembly that comprises a list of components does not include only those components but may include other components not expressly listed or inherent to such system, or assembly, or device. In other words, one or more elements in a system proceeded by “comprises… a” does not, without more constraints, preclude the existence of other elements or additional elements in the system or device.

To overcome the limitations stated in the background, the present disclosure provides an oil separator for an engine. The oil separator is configured to separate oil from the blow-by gases outlet from a crankcase of the engine. Consequently, oil-separated from the blow by gases is inlet to the crankcase and the blow-by gases are routed into the combustion chamber of the engine. Alternatively, the oil separator prevents use of additional lubricant in the crankcase, as the oil carried by the blow-by gases are routed back to the crankcase after separation. The oil separator comprises a separator plate configured on an engine head. An engine head cover is assembled over the separator plate. The engine head cover comprises at least one inlet port, which is fluidly connected to the crankcase. The blow-by gases passes on to the separator plate via the at least one inlet port. In an embodiment, the at least one inlet port is configured with a flow control valve to allow pressurised blow-by gases on to the separator plate. At least one baffle plate is configured on the separator plate, wherein blow-by gases flows through the at least one baffle plate. The baffle plate comprises a plurality of through holes for allowing the blow-by gases impinging on the baffle plate to pass through. In an embodiment, the at least one baffle plate is configured along width of the separator plate, to provide larger surface area for impinging the blow-by gases.

At least one filter plate is configured in the engine head cover such that, assembly of the engine head cover over the separator plate configures the at least one filter plate adjacent to the at least one baffle plate. This assembly enables the blow-by gases passing through the at least one baffle plate to impinge on the at least one filter plate. Impinging of blow-by gases on the at least one filter plate separates oil from the blow-by gases. Oil particles being heavier settles on the surface of the at least one filter plate and the blow-by gases gets deflected and routed to the intake manifold of the engine. The at least one filter plate is configured with plurality of splines, which enables directing the oil separated from the blow-by gases to the engine crankcase. The oil settled on the surface of the at least one filter plate being heavier, settles on the separator plate and further flows into the engine crankcase due to gravity. The oil flows into the engine crankcase via a drain port configured on the separator plate.

The terms “comprises”, “comprising”, or any other variations thereof used in the specification, are intended to cover a non-exclusive inclusion, such that a system comprises a list of components or steps does not include only those components or steps but may include other components or steps not expressly listed or inherent to such setup. In other words, one or more elements in a system or apparatus proceeded by “comprises… a” does not, without more constraints, preclude the existence of other elements or additional elements in the system or apparatus.

In the following detailed description of the embodiments of the disclosure, reference is made to the accompanying drawings that form a part hereof, and in which are shown by way of illustration specific embodiments in which the disclosure may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the disclosure, and it is to be understood that other embodiments may be utilized and that changes may be made without departing from the scope of the present disclosure. The following description is, therefore, not to be taken in a limiting sense.

Figure 1 in one exemplary embodiment of the present disclosure illustrates sectional view of the oil separator (100) assembled on an engine head (7) (herein referred to as head (7)) of an engine (10). The oil separator (100) is configured to separate oil (6) from the blow-by gases (4) outlet from a crankcase (11) of the engine (10). Consequently, oil-separated from the blow by gases (4) is inlet to the crankcase (11) and the blow-by gases (4) are routed into the combustion chamber (15) of the engine (10). The oil separator (100) comprises a separator plate (1) configured on a head (7) of the engine (10). An engine head cover (5) is assembled to the head (7) of the engine (10) to enclose the separator plate (1). In an embodiment, the engine head cover (5) is selected from plastic such as but not limiting to polypropelene, Polyethylene Teraphthalate (PET), Nylon and any other material which serves the purpose. In another embodiment, the engine head cover (5) is manufactured from aluminium. In another embodiment, the engine head cover (5) is manufactured from combinations of plastic and aluminium. The engine head cover (5) comprises at least one inlet port (8) fluidly connected to the engine crankcase (11). The at least one inlet port (8) is configured to allow blow-by gases (4) to the separator plate (1), from the engine crankcase (11). The at least one inlet port (8) creates vacuum pressure at the engine head cover (5) side, such that blow-by gases (4) are routed from the engine crankcase (11) due to the pressure difference. The blow-by gases (4) routed to the separator plate (1) contains traces of oil (6), contained in the engine crankcase (11). In an embodiment, the at least one inlet port (8) includes a flow control valve (8a) [as shown in figure 1a] for allowing pressurised blow-by gases (4) on to the separator plate (1). In an exemplary embodiment, the flow control valve (8a) is a reed valve, [shown in figure 1a], which serves the purpose of allowing pressurised blow-by gases (4) on to the separator plate (1).

In an embodiment, the reed valve is a plate structure, configured over the at least one inlet port (8) such that, one end of the plate is fixed on mouth of the at least one inlet port (8) and the other end is displaced due to the pressurized blow-by gases (4).

The engine head cover (5) comprises an air-inlet port fluidly connected to the intake manifold [not shown in figures], for routing oil-separated blow-by gases (4) into the intake manifold of the engine. In an embodiment, the air-inlet port is selected from group such as but not limiting to non-return valves, butterfly valves or any other which means which allows unidirectional flow of the blow-by gases (4).

The engine head cover (5) on its inner surface comprises at least one filter plate (3). The at least one filter plate (3) is located on the inner surface such that, upon assembly of the engine head cover (5) onto the engine head (7), the at least one filter plate (3) is configured adjacent to the at least one baffle plate (2) [as shown in figure 1b]. In an embodiment, plurality of filter plates (3) and plurality of baffle plates (2) are configured adjacent to each other based on compression ratio of the engine (10). In an embodiment, the at least one filter plate (3) configured in-between the at least one baffle plate (2) permits sinusoidal flow pattern of the blow-by gases (4) over the at least one baffle plate (2). In an embodiment, a gap exists between the lower surface of the at least one filter plate (3) and the surface of the separator plate (1) [as shown in figure 1c] for the flow of blow-by gases (4). The at least one filter plate (3) is configured to separate oil (6) contained in the blow-by gases (4), when the blow-by gases (4) passes through the at least one baffle plate (2) and impinges on the at least one filter plate (3). In an embodiment, the at least one filter plate (3) is configured offset to the at least one baffle plate (2) by a predetermined distance. The predetermined distance is calculated such that the blow-by gases (4) passing through the at least one baffle plate (2) gains momentum before impinging on the at least one filter plate (3). The predetermined distance is calculated based on the velocity of blow-by gases (4) such that, the velocity of the blow-by gases (4) does not reduce before impinging on the surface of the at least one filter plate (3). The at least one filter plate (3) also comprises plurality of splines (13) [as shown in figure 1c], which is configured to route the oil (6) collected on the surface of the at least one filter plate (3). In an embodiment of the present disclosure, the surface of the separator plate (1) is inclined towards the at least one drain port (9) to enable flow of oil (6) separated from the blow-by gases (4) into the at least one drain port (9) due to gravity.

Figure 2 in one exemplary embodiment of the present disclosure illustrates perspective view of the separator plate (1) assembled on the engine head (7). In an embodiment, the separator plate (1) is fastened to the engine head (7) by means of fasteners (16) [as shown in figure 2]. The surface of the separator plate (1) is shaped to form a channel (18), such that the oil (6) separated from the blow-by gases (4) is collected in the channel (16). The surface of the separator plate (1) is inclined towards the at least one drain port (9) such that, oil (6) can flow in to the crankcase (11) of the engine (10) via the at least one drain port (9). The separator plate (1) is configured with at least one baffle plate (2), wherein the at least one baffle plate (2) is configured proximal to the at least one inlet port (8). In another embodiment, the at least one baffle plate (2) is configured along the width of the separator plate (1) to direct the blow-by gases (4) through and over the at least one baffle plate (2). In an embodiment, a plurality of walls (2a) are configured transversely to the at least one baffle plate (2). In an embodiment, plurality of walls (2a) is joined at the aft ends of the baffle plates (2) to form an enclosure (17). The enclosure (17) acts as a barrier for the blow-by gases (4), so that the blow-by gases (4) will not deflect out of the separator plate (1). The at least one baffle plate (2) is configured with plurality of through holes (12) to allow the blow-by gases (4) to pass through. The plurality of through holes (12) acts as nozzles which reduces the pressure of the blow-by gases (4) and proportionally increases velocity of the blow-by gases (4). At bottom end of the at least one baffle plate (2) at least one opening (14) is configured, to allow oil collected from the at least one filter (3) and to pass through the at least one drain valve (9) via the channel (16). The separator plate (1) is configured with at least one drain port (9) for allowing the oil (6) separated from the blow-by gas (4) into the engine crankcase (11). In an embodiment, the at least one drain port (9) is selected from group such as but not limiting to non-return valves, ball valves or any other valves which serves the purpose. The at least one drain port (9) drains the oil (6) and routes it into the engine crankcase (11). In an embodiment, the oil (6) routed to the engine crankcase (11) flows unidirectionally. At least one non-return valve (9a) configured proximal to the at least one drain port (9), prevents oil (6) separated from the blow-by gases (4) back on to the separator plate (1). In an embodiment, the separator plate (1), the at least one baffle plate (2) and the at least one filter plate (3) are manufactured from aluminium. In another embodiment, the separator plate (1), the at least one baffle plate (2) and the at least one filter plate (3) are manufactured from plastic such as but not limiting to polypropelene, Polyethylene Teraphthalate (PET), Nylon and any other material which serves the purpose. In an embodiment, the separator plate (1), the at least one baffle plate (2) and the at least one filter plate (3) are manufactured from combinations of plastic and aluminium.

Figure 3 in one exemplary embodiment of the present disclosure, illustrates perspective view of the oil separator (100). The blow-by gases (4) enters the engine head cover (5) via the at least one inlet port (8). The blow-by gases (4) are then routed to the at least one baffle plate (2) which passes through the plurality of through holes (12). The pressure of the blow-by gases (4) passing through the plurality of through holes (12) are pressure reduced and proportionally increases velocity of the blow-by gases (4). Increased velocity of blow-by gases (4) are directed to impinge on to the at least one filter plate (3) wherein, the oil (6) contained in the blow-by gases (4) are separated due to density. Simultaneously, the high velocity blow-by gases (4) are deflected from the at least one filter plate (3). The oil (6) settled on the surface of the at least one filter plate (3) flows down on to the channel (16) the separator plate (1) due to gravity. The oil (6) in the channel (16) is further routed to the engine crankcase (11) via the at least one drain port (9). The separated blow-by gases (4) are then routed to the intake manifold of the engine (10) via the air-inlet valve for combustion.

Advantages

The present disclosure provides an oil separator for an engine, which enables oil separation in varying operating conditions.

The present disclosure provides an oil separator for an engine, which is economical to manufacture and maintain.

The present disclosure provides an oil separator for an engine, which is designed to occupy less compartment space in comparison with conventional oil separators.

The present disclosure provides an oil separator for an engine, which maintains constant reverse pressure in the engine thereby preventing oil pull over from engine cam area to engine head cover.

The present disclosure provides an oil separator for an engine manufactured using aluminium, which is lighter and thermally efficient in comparison with conventional oil separators. Therefore, the oil separator of the present disclosure reduces overall weight of the engine, resulting in increased performance and efficiency 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

REFERRAL NUMERALS DESCRIPTION
100 Oil separator
1 Separator plate
2 Baffle plate
2a Walls
3 Filter plate
4 Blow-by gases
5 Engine head cover
6 Oil
7 Engine head
8 Inlet port
8a Flow control valve
9 Drain port
10 Engine
11 Engine crankcase
12 Holes
13 Splines on filter plate
14 Opening on baffle plate
15 Combustion chamber
16 Channel
17 Enclosure
18 Fastener