CLIAMS:1. A cylinder head assembly (100) for an internal combustion engine, said cylinder head assembly (100) comprising:
• a cylinder head (102) having a cylinder head coolant passage (106) configured therein; and
• a core plug (104) adapted to plug said cylinder head coolant passage (106), said core plug (104) having a first cylindrical portion (108) and a second cylindrical portion (110) extending from said first cylindrical portion (108), wherein said first cylindrical portion (108) has a bigger diameter than said second cylindrical portion (110).

2. The cylinder head assembly (100) as claimed in claim 1, wherein said core plug (104) is adapted to facilitate deflection of coolant towards a combustion chamber of a cylinder (112) that is proximate to said core plug (104).

3. The cylinder head assembly (100) as claimed in claim 1, wherein said core plug (104) is manufactured by machining process.

4. The cylinder head assembly (100) as claimed in claim 1, wherein said core plug (104) is of sheet metal.
,TagSPECI:TECHNICAL FIELD

The present disclosure generally relates to internal combustion engines. More particularly, the present disclosure relates to a cylinder head assembly of an internal combustion engine for facilitating improved cooling of the engine.

BACKGROUND OF DISCLOSURE

A cooling system of an internal combustion engine uses either air or a liquid coolant for cooling. One of the key requirements of the cooling system of the internal combustion engine is to keep parts of the internal combustion engine at suitably low temperatures. The size/ dimensions of passageways configured in an engine block are varied so that coolant flow may be tailored to the needs of each area. Generally, locations with high peak temperatures (such as combustion chamber) or high heat flow (around exhaust ports) require more cooling. This arrangement of varying the size of the coolant passageway near the high cooling requirement area reduces the occurrence of hot spots.

The engine block of the internal combustion engine includes one or more cylinders and a cylinder head attached to the cylinder/engine block to close the top portion of the cylinders. The engine block and the cylinder head are generally formed as aluminum or iron castings. For manufacturing internal cavities in the cylinder head casting, such as coolant carrying passages, cores are used which are placed in the mold. The cores are supported in one or more places in the mold by core prints. The resultant casting after the removal of cores comprises of openings, and is referred as core holes. These core holes must be closed before the casting can be used for passing coolant. The core holes formed in the casted part is closed with core plugs. The conventional core plugs only seals and closes the core holes.

Accordingly, there is need of a cylinder head assembly for engines that facilitates improved cooling of engines.

OBJECTS OF THE DISCLOSURE

One object of the present disclosure is to provide a cylinder head assembly for engines that facilitates improved cooling of engines.

Another object of the present disclosure is to provide a cylinder head assembly for engines that is cost effective.

Yet another object of the present disclosure is to provide a cylinder head assembly for engines that is simple in construction.

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 cylinder head assembly for an internal combustion engine. The cylinder head assembly includes a cylinder head and a core plug. The cylinder head has a cylinder head coolant passage configured therein. The core plug is adapted to plug the cylinder head coolant passage. The core plug has a first cylindrical portion and a second cylindrical portion extending from the first cylindrical portion, wherein the first cylindrical portion has a bigger diameter than the second cylindrical portion.

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 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 an exploded view of a cylinder block assembly, according to an embodiment of the present disclosure;

FIG. 2 illustrates an assembled view of the cylinder block assembly of FIG. 1; and

FIG. 3 illustrates a sectional view of the cylinder block assembly of FIG. 1 depicting a cylinder head coolant passage in the cylinder head and a core plug in an assembled configuration.

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 system 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.

The present disclosure provides a cylinder head assembly for an internal combustion engine. The cylinder head assembly of the present disclosure facilitates improved cooling for engines. The cylinder head assembly of the present disclosure includes a cylinder head and a core plug. The core plug of the cylinder head assembly not only plugs a coolant jacket core/ cylinder head coolant passage but also facilitates enhanced cooling effect to the internal combustion engine. Further, the cylinder head assembly of the present disclosure is cost effective to manufacture and simple in construction.

Referring to Figures 1 to 3, a cylinder head assembly (100) is disclosed in accordance with one embodiment of the present disclosure. The cylinder head assembly (100) includes a cylinder head (102) and a core plug (104). The cylinder head (102) includes a cylinder head coolant passage (106) (as illustrated in Figure 3).

The core plug (104) is adapted to plug the cylinder head coolant passage (106). The core plug (104) includes a first cylindrical portion (108) (illustrated in Figure 1) and a second cylindrical portion (110) (illustrated in Figure 1). The second cylindrical portion (110) extends from the first cylindrical portion (108). The first cylindrical portion (108) has a bigger diameter than the second cylindrical portion (110). Due to this difference in the diameter of the first cylindrical portion (108) and the second cylindrical portion (110), a projection is formed between the first cylindrical portion (108) and the second cylindrical portion (110). The core plug (104) is adapted to facilitate deflection of coolant flow inside the cylinder head coolant passage (106) towards a combustion chamber of a cylinder (112) (illustrated in Figure 3) that is proximate to the core plug (104). More specifically, this deflection of coolant flow inside the cylinder head coolant passage (106) towards the combustion chamber of the cylinder (112) increases the heat transfer coefficient to desired level in the region of the combustion chamber of the cylinder (112), thereby facilitating increased cooling effect in that region. The cylinder (112) may be referred to as the first cylinder among the plurality of cylinders of the internal combustion engine.

In one embodiment, the core plug (104) is fitted into the cylinder head (102) by a method such as but not limiting to snap fitting or press fitting operation. However, the present invention is not limited to any particular method used for fitting the core plug (104) into the cylinder head (102). In one embodiment, the core plug (104) is manufactured by machining process. However, the present disclosure is not limited to any particular manufacturing process used for making the core plug (104). Further, in one embodiment, the core plug (104) is of sheet metal. However, the present disclosure is not limited to any particular material used for manufacturing the core plug (104).

The cylinder head assembly (100) of the present disclosure facilitates cooling of the hot walls of the internal combustion engine in a way such that that the internal combustion engine serves their normal function without getting affected by thermal stresses that are induced due to overheating.

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 Cylinder head assembly
102 Cylinder head
104 Core plug
106 Cylinder head coolant passage
108 First cylindrical portion
110 Second cylindrical portion
112 Cylinder/ first cylinder