Claims:We claim:
1. An engine head water jacket (104) to provide coolant to an engine head (102), the engine head water jacket (104) comprising,
a restrictor gallery (300) to intake and distribute coolant to an upper portion (201) and a lower portion (202) of the engine head (102),
wherein one end (301) of the restrictor gallery (300) is connected to the engine head water jacket (104),
wherein another end (302) of the restrictor gallery (300) includes a first portion (401) and a second portion (402), wherein the first portion (401) submerge with a junction (403) and provides a first opening (501) to flow the coolant towards the engine head water jacket (104),
wherein the second portion (402) includes an eccentric cross-section area located on top of the first portion (401).

2. The engine head water jacket (104) as claimed in claim 1, wherein the first opening (501) is connected to the restrictor gallery (300) that is divided into a second opening (502) that leads to an Integrated Exhaust Manifold (IEM) water jacket region on the upper portion (201) and a third opening (503) that leads to intake-exhaust valve bridge region on lower portion (202).

3. The engine head water jacket (104) as claimed in claim 1, wherein the restrictor gallery (300) is cylindrical.

4. The engine head water jacket (104) as claimed in claim 1, comprises a plurality of restrictor galleries (300) corresponding to a number of engine heads (102).

5. The engine head water jacket (104) as claimed in claim 2, wherein the engine head water jacket (104) is adapted to control a flow of the coolant to the second opening (502) and to the third opening (503).
, Description:AN ENGINE HEAD WATER JACKET

TECHNICAL FIELD
[0001] The present subject matter described herein relates to coolant jackets of an internal combustion engine. In particular, the present subject matter relates to an engine head water jacket provided on the engine head to improve coolant flow in an intake-exhaust valve bridge region.

BACKGROUND
[0002] . The internal combustion engine heat removal is a serious challenge, owing to material limits and component durability. A coolant jacket covers combustion chamber walls, intake, and exhaust ports, and removes the majority of the excessive heat that is created in the engine.
[0003] The coolant jacket or water jacket is provided on the engine block as well as on the engine head. The purpose of the coolant jacket is to extract the heat from the engine and remove the same, and dissipate the heat in the surroundings. The challenge that is usually faced in the water jacket is related to the engine head water jacket.
[0004] Usually, the coolant enters the engine block water jacket via a water pump area and goes in the engine head water jacket via gasket holes. There are some openings in the engine head water jacket and the engine block water jacket and these openings are connected with holes in the gasket.
[0005] In the engine water jacket, coolant enters into the water jacket from the water pump area and then flows into the cylinder block side and through the head gasket holes it finally reaches to cylinder head exhaust critical junction area, from where coolant further splits towards an intake-exhaust valve bridge region and Integrated Exhaust Manifold (IEM) water jacket region.
[0006] The temperature at the exhaust valve side of an internal combustion engine is usually higher than the temperature at the intake valve side. As a result, higher coolant flow is necessary for the exhaust side compared to the intake side to keep engine parts within the design temperature range and avoid engine durability issues.
[0007] At present different design approaches have been used to ensure high coolant flow towards the exhaust side, some of which are like reducing intake side coolant water jacket cross-sectional area, so that coolant flow at intake is less due to high flow resistance thus allowing more flow towards the exhaust side.
[0008] The drawback with the existing designs is that coolant flows more towards the exhaust side without being able to control the coolant flow towards different critical regions i.e. exhaust-exhaust side and exhaust-intake side valve bridge region, specifically in engine head water jacket design with an integrated exhaust manifold design.
[0009] Therefore, it is required to provide a water jacket that optimizes the coolant flow towards the intake-exhaust valve bridge region from the critical junction area in the cylinder head water jacket.

OBJECTS OF THE DISCLOSURE
[0010] It forms an object of the present disclosure to overcome the aforementioned and other drawbacks/limitations in the existing solutions available in the form of related prior arts.
[0011] The primary object of the present disclosure is to provide a restrictor gallery in a water jacket that controls the coolant flow towards the intake-exhaust valve bridge region from the critical junction area in the cylinder head.
[0012] It is another object of the present disclosure to provide an obstruction in the coolant flow in the junction area provided between one end and another end of the restrictor gallery.
[0013] It is yet another object of the present disclosure to divert more coolant flow towards the intake-exhaust valve bridge region as compared to the IEM side water jacket area.
[0014] These and other objects and advantages of the present subject matter will be apparent to a person skilled in the art after consideration of the following detailed description taken into consideration with accompanying drawings in which preferred embodiments of the present subject matter are illustrated.

SUMMARY
[0015] A solution to one or more drawbacks of existing technology and additional advantages are provided through the present disclosure. Additional features and advantages are realized through the technicalities of the present disclosure. Other embodiments and aspects of the disclosure are described in detail herein and are considered to be a part of the claimed disclosure.
[0016] The present disclosure provides a solution in the form of an engine head water jacket to provide coolant to an engine head. The engine head water jacket includes a restrictor gallery to intake and distribute coolant to an upper portion and a lower portion of the engine head.
[0017] In an aspect, the first opening is connected to the restrictor gallery that is divided into a second opening that leads to IEM water jacket region on the upper portion and a third opening that leads to intake-exhaust valve bridge region on lower portion.
[0018] In an aspect, the restrictor gallery is cylindrical.
[0019] In an aspect, the engine head water jacket has a plurality of restrictor galleries corresponding to a number of engine heads.
[0020] In an aspect, the engine head water jacket is adapted to reduce a flow of the coolant to the second opening and to the third opening.
[0021] 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 ACCOMPANYING DRAWINGS
[0022] It is to be noted, however, that the appended drawings illustrate only typical embodiments of the present subject matter and are therefore not to be considered for limiting of its scope, for the present disclosure may admit to other equally effective embodiments. The detailed description is described with reference to the accompanying figures. In the figures, a reference number identifies the figure in which the reference number first appears. The same numbers are used throughout the figures to reference like features and components. Some embodiments of system or methods or structure in accordance with embodiments of the present subject matter are now described, by way of example, and with reference to the accompanying figures, in which:
[0023] FIG. 1(a) and FIG. 1(b) shows an engine block (101) having an engine block water jacket (103) and an engine head (102) having an engine head water jacket (104) according to the present disclosure;
[0024] Fig. 2 illustrates a second perspective view of the engine head water jacket and the engine block water jacket according to the present disclosure;
[0025] Fig. 3 illustrates a side view of the engine head water jacket and the engine block water jacket according to the present disclosure;
[0026] Fig. 4 illustrates a restrictor gallery according to the present disclosure;
[0027] Fig. 5 illustrates a path of the coolant in the engine head water jacket according to the present disclosure.
[0028] The figures depict embodiments of the present subject matter for illustration only. A person skilled in the art will easily 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 OF INVENTION
[0029] The detailed description of various exemplary embodiments of the disclosure is described herein with reference to the accompanying drawings. It should be noted that the embodiments are described herein in such details as to communicate the disclosure. However, the amount of details provided herein is not intended to limit the anticipated variations of embodiments; on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the present disclosure as defined by the appended claims.
[0030] It is also to be understood that various arrangements may be devised that, although not explicitly described or shown herein, embody the principles of the present disclosure. Moreover, all statements herein reciting principles, aspects, and embodiments of the present disclosure, as well as specific examples, are intended to encompass equivalents thereof.
[0031] It should also be noted that in some alternative implementations, the functions/acts noted may occur out of the order noted in the figures. For example, two figures shown in succession may be executed concurrently or may sometimes be executed in the reverse order, depending upon the functionality/acts involved.
[0032] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which example embodiments belong. It will be further understood that terms, e.g., those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
[0033] 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.
[0034] Hereinafter, a description of an embodiment with several components in communication with each other does not imply that all such components are required. On the contrary, a variety of optional components are described to illustrate the wide variety of possible embodiments of the present disclosure.
[0035] The present invention discloses about a water jacket to provide coolant to an engine block and engine head. The water jacket of the engine head has a restrictor gallery that optimizes and reduces the flow of a coolant in an effective manner.
[0036] Referring to FIG. 1(a) and FIG. 1(b) shows an engine block (101) having an engine block water jacket (103) and an engine head (102) having an engine head water jacket (104). The engine block water jacket (103) and the engine head water jacket (104) have multiple passages, through which the coolant circulates. The engine head is located on top of the engine block (101). Further, the engine head (102) is connected to the engine block (101) via its bottom surfaces and a gasket is provided on the bottom surface to seal the engine head (102) with the engine block (101).
[0037] The entire shape of the gasket matches the shape of the upper surface of the engine block (101). The gasket is provided with holes. The engine block water jacket (103) and the engine head water jacket (104) are connected to each other through the holes. Therefore, the peripheries of the holes provided on the engine block water jacket (103) and the engine head water jacket (104) are sealed by the elastic repulsive force of the gasket.
[0038] The coolant enters into the engine block water jacket (103) from a water pump area and then flows into the engine block (101) side and through gasket holes and finally reaches to engine head water jacket (104). Therefore, the coolant is directed to flow from the engine block water jacket (103) towards the engine head water jacket (104).
[0039] Referring to FIG. 2 discloses an upper portion (201) on the engine head water jacket (104) and a lower portion region (202) on the engine head water jacket (104). The upper portion (201) comprises an Integrated Exhaust Manifold (IEM) water jacket region and the lower portion (202) comprises an intake-exhaust valve bridge region.
[0040] The coolant reaches the intake-exhaust valve bridge region and IEM water jacket region through the restrictor gallery (300) (as illustrated in FIG.3) between the engine block water jacket (103) and the engine head water jacket (104).
[0041] Referring to FIG. 3 discloses a side view showing the engine block water jacket (103) and the engine head water jacket (104). The restrictor gallery (300) is provided on the engine head water jacket (104). The coolant enters from the engine block water jacket (103) into the engine head water jacket (104) by the restrictor gallery (300).
[0042] The restrictor gallery (300) has a cylindrical shape and is hollow and acts as path for transferring the coolant from the engine block water jacket (103) to the engine head water jacket (104).
[0043] The restrictor gallery (300) has two ends (301, 302). One end (301) of the restrictor gallery (300) is connected to the engine head water jacket (104) and another end (302) is connected to the gasket and the gasket is further connected to the engine block water jacket (103). Therefore, the coolant coming from the engine block water jacket (103) enters into the engine head water jacket (104) through one end (301) and via the restrictor gallery (300).
[0044] Further, the coolant from the engine head water jacket (104) flows in the upper portion (201) (as illustrated in Fig. 2) and the lower portion (202) (as illustrated in Fig. 2) of the engine head water jacket (104).
[0045] Referring to FIG. 4 shows the restrictor gallery (300) that acts as a transferring path between the engine block water jacket (103) and the engine head water jacket (104). The restrictor gallery (300) is cylindrical and hollow. The purpose of the restrictor gallery (300) is to effectively distribute the coolant into the upper portion (201) (as illustrated in Fig. 2) and the lower portion (202) (as illustrated in Fig. 2) of the engine head (102). The upper portion (201) has the IEM water jacket region and the lower portion (202) has the intake exhaust and the exhaust valve bridge region (as illustrated in Fig. 2).
[0046] Another end (301) of the restrictor gallery (300) includes a first portion (401) and a second portion (402). A junction (403) is created between the first portion (401) and the second portion (402) where the first portion (401) comes in contact with the second portion (402).
[0047] The second portion (402) includes an eccentric cross-section area that is located on top of the first portion (401). The eccentric cross-section area is elongated in an upwards direction towards the engine head water jacket (104). As the eccentric cross-section area is hollow, the coolant flows in circular motion inside the eccentric cross-section area before reaching a first opening (501) (as illustrated in Fig. 5).
[0048] Referring to FIG. 4 and FIG. 5, the first portion (401) submerges with the junction (403) and provides the first opening (501) to flow the coolant towards the engine head water jacket (104). The coolant goes to a second opening (502) and a third opening (503) by means of a first opening (501).
[0049] The second opening (502) leads to the upper portion (201) (as illustrated in Fig. 2) of the engine head water jacket (104) that includes the IEM water jacket. The third opening (503) leads to the lower portion (202) that has the intake-exhaust valve bridge region (as illustrated in Fig. 2).
[0050] Since the first opening (501) that is created on the junction (403) is required to control the flow, the eccentric cross-section area on the restrictor gallery (300) has the hollow space to circulate the coolant and only allow optimized or reduced flow of coolant through the first opening (501).
[0051] Therefore, the optimized flow of the coolant is sent to the second opening (502) and the third opening (503) to enhance the coolant flow towards areas of high temperature or where there are high-temperature zones to prevent the engine head (102) from any kind of damage and increase heat dissipation.
[0052] The engine head water jacket (104) has multiple restrictor galleries (300) corresponding to a multiple set of engine cylinders (102). Therefore, the coolant flow towards areas of high temperature on each engine head (102) (as illustrated in Fig. 1) is carried out.

TECHNICAL ADVANTAGES
[0053] With the help of the solution as proposed herein in the context of the present disclosure, coolant is provided in the first, second and third openings in a controlled manner.
[0054] With the design of the present disclosure, coolant flow towards areas of high temperature is enhanced for better heat dissipation.
[0055] It will be understood by those skilled in the art, 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 disclosures 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. Also, 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 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 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.”
[0056] It will be further appreciated that functions or structures of a plurality of components or steps may be combined into a single component or step, or the functions or structures of one-step or component may be split among plural steps or components. The present disclosure contemplates all of these combinations. Unless stated otherwise, dimensions and geometries of the various structures depicted herein are not intended to be restrictive of the disclosure, and other dimensions or geometries are possible. Also, while a feature of the present disclosure may have been described in the context of only one of the illustrated embodiments, such feature may be combined with one or more other features of other embodiments, for any given application. It will also be appreciated from the above that the fabrication of the unique structures herein and the operation thereof also constitute methods in accordance with the present disclosure. The present disclosure also encompasses intermediate and end products resulting from the practice of the methods herein. The use of “comprising” or “including” also contemplates embodiments that “consist essentially of” or “consist of” the recited feature.