DESC:A CYLINDER BLOCK ASSEMBLY
FIELD OF THE INVENTION
[0001]
The present subject matter is related, in general to internal combustion engines, and more particularly, but not exclusively to a cylinder block assembly.
BACKGROUND OF THE INVENTION 5
[0002]
An internal combustion engine generates a great amount of heat as a result of the combustion processes taking place in an engine block assembly. Pistons move within cylinder bores toward and away from a cylinder head that includes intake and exhaust valves. The cylinder head seals a top end of a cylinder bore. The cylinder bores, head, and pistons form combustion chambers of the 10 engine. As a piston travels upwardly toward the top of the cylinder bore, a gas/fuel mixture is compressed within the cylinder. The cylinder pressure can be as high as 10,000 psi. Prior to reaching the top of the piston travel, a spark and the compression of the mixture causes a controlled burn that can reach as high as 1400° C. The controlled burning of the compressed gas/fuel mixture pushes the 15 piston downward in the cylinder, thereby rotating a crankshaft. The burning of the gas/fuel mixture generates a significant amount of heat within the engine.
[0003]
The operating temperature of an engine can generally be maintained within acceptable limits by the circulation of coolant in the engine block, around the cylinders, and through portions of the cylinder head. Demands for greater 20 horsepower output of engines, and for reduced hydrocarbon emissions in conjunction with catalyst systems, have both resulted in substantially increased combustion temperatures and hotter running engines. The increased temperatures occur primarily within the engine block, especially near the most highly heated top portions of the cylinders, near the cylinder head. 25
[0004]
In existing integrated cylinder block assembly, if there is a failure in the liner, we have to replace the entire cylinder assembly, which is very costly. Secondly there is a manufacturing challenge, we must add more cores for the water jacket, which increases the cost of manufacturing. Thus, conventionally, the
Classification: Confidential
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liner and barrel were monolithic and had to be replaced together.
Further, inside the cylinder block assembly, the reciprocating member is the piston, there is direct contact, and rubbing between the liner and the piston. Piston seizure, piston noise, and the like will require replacement of entire part. Further, the manufacturing of the integrated core is complicated with multiple cores. 5
[0005]
Further limitations and disadvantages of conventional and traditional approaches will become apparent to one of skill in the art, through comparison of described systems with some aspects of the present disclosure, as set forth in the remainder of the present application and with reference to the drawings.
SUMMARY 10
[0006]
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.
[0007]
According to embodiments illustrated herein, there is provided a cylinder 15 block assembly. The cylinder block assembly comprises a cylinder barrel configured to house a sheath. The cylinder block assembly further comprises the sheath configured to have a cylindrical section. The sheath comprises a top portion and a bottom portion. In an embodiment, the cylindrical section is configured to receive a piston assembly that reciprocates in the cylinder block 20 assembly. The top portion is configured to mate with a cylinder head. The cylinder block assembly further comprises a plurality of toric joints disposed onto an outer surface of the sheath. The plurality of toric joints is configured to prevent water entry from an interfacing between the cylinder barrel and the sheath.
BRIEF DESCRIPTION OF THE DRAWINGS 25
[0008]
The present invention will become more fully understood from the detailed description given herein below and the accompanying drawings which are given by way of illustration only, and thus are not limitative of the present invention, and wherein
Classification: Confidential
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[0009]
Figure 1 shows a side elevational view of a vehicle, such as a motorcycle incorporating the invention.
[00010]
Figure 2 shows a perspective side view of a cylinder block assembly, in accordance with some embodiments of the present disclosure.
[00011]
Figure 3 shows an exploded view of the cylinder block assembly, in 5 accordance with some embodiments of the present disclosure.
[00012]
Figure 4 illustrates a half sectional cut view of the cylinder block assembly, in accordance with some embodiments of the present disclosure.
DETAILED DESCRIPTION OF THE DRAWINGS
[00013]
The present disclosure may be best understood with reference to the 10 detailed figures and description set forth herein. Various embodiments are discussed below with reference to the figures. However, those skilled in the art will readily appreciate that the detailed descriptions given herein with respect to the figures are simply for explanatory purposes as the methods and systems may extend beyond the described embodiments. For example, the teachings presented 15 and the needs of a particular application may yield multiple alternative and suitable approaches to implement the functionality of any detail described herein. Therefore, any approach may extend beyond the particular implementation choices in the following embodiments described and shown.
[00014]
References to “one embodiment,” “at least one embodiment,” “an 20 embodiment,” “one example,” “an example,” “for example,” and so on indicate that the embodiment(s) or example(s) may include a particular feature, structure, characteristic, property, element, or limitation but that not every embodiment or example necessarily includes that particular feature, structure, characteristic, property, element, or limitation. Further, repeated use of the phrase “in an 25 embodiment” does not necessarily refer to the same embodiment.
[00015]
The present invention now will be described more fully hereinafter with different embodiments. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set
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forth herein; rather those embodiments are provided so that this disclosure will be
thorough and complete, and fully convey the scope of the invention to those skilled in the art.
[00016]
The present invention is illustrated with a motorcycle type vehicle. However, a person skilled in the art would appreciate that the present invention is 5 not limited to a motorcycle type vehicle and certain features, aspects and advantages of embodiments of the present invention can be used with other types of two wheelers such as scooter type vehicle, step thru, and the like. In an embodiment, the scooter type vehicle comprises a low floor board type vehicle and the term scooter as used herein should not be inferred to restrict the maximum 10 speed, the displacement amount or the like of the vehicle.
[00017]
The object of the present subject matter is to provide a cylindrical sheath cast in a cylinder barrel of a cylinder block assembly for a single cylinder and/or a multi-cylinder internal combustion engine vehicle and aims at overcoming the technical problems mentioned above and the disadvantages in the existing art. Yet 15 another aspect of the present subject matter provides the cylinder block assembly that enhances adhesion between the sheath and the cylinder barrel and to uniformize the generation of the stress during cooling.
[00018]
Another aspect of the present subject matter provides the cylinder block assembly that provides a leak proof joint mechanisms between the cylinder barrel 20 and the sheath. Another aspect of the present subject matter provides the cylinder block assembly that is more robust, which requires very less machining in the cylinder block. Another aspect of the present subject matter provides the cylinder block assembly that improvs serviceability of the vehicle. Yet another aspect of the present subject matter provides the cylinder block assembly that strengthens 25 the engine and improves performance.
[00019]
Figure 1 shows a side elevational view of a motorcycle incorporating the invention.
Classification: Confidential
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[00020]
With reference to Figure 1, 1 denotes a vehicle, such as a motorcycle, 2 denotes a front wheel, 3 denotes a rear wheel, 4 denotes a front fork, 5 denotes a seat, 6 denotes a rear fork, 7 denotes a leg shield made of resin or metal, 8 denotes a headlight, 9 denotes a tail light, 10 denotes an aesthetic covering, 11 denotes a battery fitted inside the aesthetic covering, 12 denotes a fuel tank, and 13 denotes 5 a handle bar. Further, a main frame extends along a center of a body of the vehicle from a front portion of the vehicle and extending in a rearwardly direction. The main frame is made up of a metallic pipe.
[00021]
In an embodiment, the vehicle may be a scooter type vehicle and may have main frame that extends along a center of the body of the vehicle from a 10 front portion of the vehicle and extending in a rearwardly direction. The main frame is made up of a metallic pipe and the main frame is provided under the floor board for a scooter type vehicle. A swing type power unit is coupled to the rear end of the main frame for a scooter type vehicle. A rear wheel is supported on one side of the rear end of the swing type power unit. In an embodiment, the swing 15 type power unit is suspended in the rear of a body frame for a scooter type vehicle.
[00022]
The center of the body for a scooter type vehicle forms a low floor board for functioning as a part for putting feet and a under cowl which is located below a rider's seat and covers at least a part of the engine. In an embodiment, the under 20 cowl is made up of metal or resin. The under cowl is hinged to the seat. Further, a utility box opens from the rear end to hinged portion. In an embodiment, the utility box is provided under the seat extending longitudinally of a vehicle body and the inside of the utility box has a large capacity so that a large article, such as a helmet can be housed. Additionally, in a scooter type vehicle, side covers both 25 on left and right sides, cover the utility box and other parts of the vehicle, thereby providing a good appearance to the vehicle.
[00023]
Figure 2 shows a perspective side view of a cylinder block assembly (100), in accordance with some embodiments of the present disclosure.
Classification: Confidential
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[00024]
The cylinder block assembly (100) is covered on one side with a cylinder head, in which the means necessary for internal combustion are arranged: in particular, intake means, exhaust means and optional ignition means. On the other side, the cylinder block is covered with an engine crankcase in which a crankshaft is housed. 5
[00025]
The cylinder block assembly (100) comprises of three major parts, a cylinder barrel (102), a sheath (104) and a plurality of toric joints (106). The cylinder barrel (102) is manufactured separately and act as a housing for the sheath (104).
[00026]
The cylinder block assembly (100) comprises the cylinder barrel (102) 10 configured to house a sheath (104). The sheath (104) is configured to have a cylindrical section. In an embodiment, the sheath (104) comprises a top portion and a bottom portion. In an embodiment, the cylindrical section is configured to receive a piston assembly that reciprocates in the cylinder block assembly (100). In an embodiment, the top portion is configured to mate with a cylinder head. The 15 bottom portion of the sheath (104) and the cylinder barrel (102) is covered with a crank case.
[00027]
The cylindrical section includes a radial inner surface that is substantially uniform in diameter. In an embodiment, the radial inner surface of the cylinder barrel (102) is machined to provide a resting portion (108) to rest an annular 20 protrusion (110) provided that is provided on the sheath (104). In an embodiment, the annular protrusion (110) is provided on a central portion of the outer surface of the sheath. In an embodiment, the resting portion is step shaped and configured circumferentially on the inner surface of the cylinder barrel (102), and wherein the cylinder barrel (102) has different inner diameters that vary along a length of the 25 cylinder barrel (102). In an embodiment, the sheath (104) has different outer diameter that vary along a length of the sheath (104). In an embodiment, the sheath (104) is removably configured in the cylinder barrel (102), and a gap is created between the inner surface of the cylinder barrel (102) and the outer surface of the sheath (104) above the annular protrusion (110). In an embodiment, a 30
Classification: Confidential
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portion of the sheath (104) is extended below the cylinder barrel (102)
. In an embodiment, the sheath (104) is removably configured in the cylinder barrel (102), and a gap is created between the inner surface of the cylinder barrel (102) and the outer surface of the sheath (104) above the annular protrusion (110). In an embodiment, the bottom portion of the sheath (104) and a bottom portion of the 5 cylinder barrel (102) are covered with a crank case.
[00028]
The sheath (104) comprises a plurality of annular grooves (112) provided on the outer surface of the sheath. In an embodiment, the plurality of annular grooves (112) is disposed below the annular protrusion (110). In an embodiment, the plurality of annular grooves (112) is separated by at least one solid radial 10 region, wherein the plurality of toric joints (106) are disposed in the plurality of annular grooves (112).
[00029]
In an embodiment, the sheath (104) is made up of aluminum and the sheath (104) is configured to act as a guiding member for installing the piston assembly. In an embodiment, the sheath (104) is machined separately and 15 assembled on the cylinder barrel (102) along with the plurality of toric (106) joints to prevent the water entry.
[00030]
The cylinder block assembly (100) comprises a plurality of toric joints (106) disposed onto an outer surface of the sheath (104). In an embodiment, the plurality of toric joints (106) is configured to prevent water entry from an 20 interfacing between the cylinder barrel (102) and the sheath (104). In an embodiment, the plurality of toric joints (106) is provided using O-rings. Further, water jackets are provided around the sheath to provide a cooling effect to the cylinder block assembly (100) and enhance the performance of the engine of the vehicle. 25
[00031]
Figure 3 shows an exploded view of the cylinder block assembly (100), in accordance with some embodiments of the present disclosure. The exploded view shows the sheath (104) configured to have a cylindrical section. The sheath (104) comprises a top portion and a bottom portion and the cylindrical section is
Classification: Confidential
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configured to receive
the piston assembly (not shown) that reciprocates in the cylinder block assembly (100).
[00032]
As shown in the exploded view of Figure 3, the cylindrical section includes a radial inner surface that is substantially uniform in diameter, and wherein the radial inner surface of the cylinder barrel (102) is machined to 5 provide a resting portion (108) to rest an annular protrusion (110) provided that is provided on the sheath (104).
[00033]
As shown in the exploded view of Figure 3, the annular protrusion (110) is provided on a central portion of the outer surface of the sheath. Further, as shown in the exploded view of Figure 3, the sheath (104) comprises a plurality of 10 annular grooves (112) provided on the outer surface of the sheath. The plurality of annular grooves (112) is disposed below the annular protrusion (110). The plurality of annular grooves (112) is separated by at least one solid radial region. The plurality of toric joints (106) are disposed in the plurality of annular grooves (112). 15
[00034]
The plurality of toric joints (106) disposed onto an outer surface of the sheath (104). The plurality of toric joints (106) is configured to prevent water entry from an interfacing between the cylinder barrel (102) and the sheath (104). The plurality of toric joints (106) is provided using O-rings.
[00035]
Figure 4 illustrates a half sectional cut view of the cylinder block 20 assembly, in accordance with some embodiments of the present disclosure.
[00036]
Figure 4 highlights the resting portion 108 provided in the cylinder barrel 102 by performing machining. Further, in Figure 4, the annular protrusions 110 of the sheath 104 are visible in the half sectional cut view. The annular protrusions 110 of the sheath 104 is provided support by the resting portion 108. The 25 cylindrical section of the sheath (104) includes a radial inner surface that is substantially uniform in diameter, and wherein the radial inner surface of the cylinder barrel (102) is machined to provide a resting portion (108) to rest an annular protrusion (110) provided that is provided on the sheath (104).
Classification: Confidential
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[00037]
The sheath (104) comprises a plurality of annular grooves (112) provided on the outer surface of the sheath. The plurality of annular grooves (112) is disposed below the annular protrusion (110). The plurality of annular grooves (112) is separated by at least one solid radial region. The plurality of toric joints (106) are disposed in the plurality of annular grooves (112). 5
[00038]
Additionally, the cut section of the plurality of toric joints 106 are shown. The plurality of toric joints (106) is disposed onto an outer surface of the sheath (104) and the plurality of toric joints (106) is configured to prevent water entry from an interfacing between the cylinder barrel (102) and the sheath (104).
[00039]
The terms “an embodiment”, “embodiment”, “embodiments”, “the 10 embodiment”, “the embodiments”, “one or more embodiments”, “some embodiments”, and “one embodiment” mean “one or more (but not all) embodiments of the invention(s)” unless expressly specified otherwise. The terms “including”, “comprising”, “having” and variations thereof mean “including but not limited to”, unless expressly specified otherwise. The terms “a”, “an” and 15 “the” mean “one or more”, unless expressly specified otherwise.
Advantages
[00040]
The disclosed claimed limitations and the disclosure provided herein provides a modular cylinder block assembly (100) for a vehicle.
[00041]
The claimed limitations of the the cylinder block assembly (100) provides 20 a sheath that is inserted within an existing cylinder bore/barrel of an engine block, to strengthen the engine and improve performance. The claimed limitations of the the cylinder block assembly is more robust, which requires very less machining in the cylinder block and can operate with more efficiency. Further, since the sheath is made of full Aluminum, it reduces the temperature of the piston by being in 25 direct contact with circulating water. The claimed limitations of the the cylinder block assembly provides a leak proof joint between the cylinder casting and the sheath. Thus, the claimed cylinder block assembly is ensures weight reduction and
Classification: Confidential
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ease of assembly of components of the
cylinder block assembly. Further, because of the sheath, the durability of the cylinder block assembly is improved.
[00042]
In contrast, to the conventional cylinder block assembly, only the sheath can be replaced easily and for this purpose there is no need of any special tool or equipment thereby improving serviceability. Further, sheath can be finished 5 accurately before fitting, whereas a conventional dry liner cannot be finished accurately before fitting because of the shrinkage stresses produced. Further, the required core thickness minimum is >3mm for a 300cc engine which could not be achieve the bore thickness and increase the capacity. With the claimed cylinder block assembly the cubic capacity is also increased without any modifications 10 required in the components surrounding the cylinder block assembly.
[00043]
In light of the above mentioned advantages and the technical advancements provided by the disclosed method and system, the claimed steps as discussed above are not routine, conventional, or well understood in the art, as the claimed steps enable the following solutions to the existing problems in 15 conventional technologies. Further, the claimed steps clearly bring an improvement in the functioning of the guard assembly itself as the claimed steps and constructional features provide a technical solution to a technical problem.
[00044]
Finally, the language used in the specification has been principally selected for readability and instructional purposes, and it may not have been 20 selected to delineate or circumscribe the inventive subject matter, and is therefore intended that the scope of the invention be limited not by this detailed description, but rather by any claims that issue on an application based here on. Accordingly, the embodiments of the present invention are intended to be illustrative, but not limiting, of the scope of the invention, which is set forth in the following claims. 25
[00045]
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. 30
Classification: Confidential
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[00046]
A person with ordinary skills in the art will appreciate that the systems, modules, and sub-modules have been illustrated and explained to serve as examples and should not be considered limiting in any manner. It will be further appreciated that the variants of the above disclosed system elements, modules, and other features and functions, or alternatives thereof, may be combined to 5 create other different systems or applications.
[00047]
Those skilled in the art will appreciate that any of the aforementioned steps and/or system modules may be suitably replaced, reordered, or removed, and additional steps and/or system modules may be inserted, depending on the needs of a particular application. In addition, the systems of the aforementioned 10 embodiments may be implemented using a wide variety of suitable processes and system modules, and are not limited to any particular computer hardware, software, middleware, firmware, microcode, and the like. The claims can encompass embodiments for hardware and software, or a combination thereof.
[00048]
While the present disclosure has been described with reference to certain 15 embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the scope of the present disclosure. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the present disclosure without departing from its scope. Therefore, it is intended that the present 20 disclosure not be limited to the particular embodiment disclosed, but that the present disclosure will include all embodiments falling within the scope of the appended claims. ,CLAIMS:I/We Claim:
1.
A cylinder block assembly (100), the cylinder block assembly (100) comprising:
a cylinder barrel (102); 5
a sheath (104) received in the cylinder barrel (102) and configured to have a cylindrical section, wherein the cylindrical section is configured to receive a piston assembly that reciprocates in the cylinder block assembly; and
a plurality of toric joints (106) disposed onto an outer surface of 10 the sheath (104), wherein the plurality of toric joints (106) are configured to prevent water entry from an interfacing between the cylinder barrel (102) and the sheath (104).
2.
The cylinder block assembly (100) as claimed in claim 1, wherein the 15 cylindrical section includes a radial inner surface that is substantially uniform in diameter, and wherein an inner surface of the cylinder barrel (102) comprises a resting portion to rest against an annular protrusion (110) provided on the sheath (104).
20
3.
The cylinder block assembly (100) as claimed in claim 2, wherein the resting portion is step shaped and configured circumferentially on the inner surface of the cylinder barrel (102), and wherein the cylinder barrel (102) has different inner diameters that vary along a length of the cylinder barrel (102). 25
4.
The cylinder block assembly (100) as claimed in claim 2, wherein the annular protrusion (110) is provided on a central portion on the outer surface of the sheath (104), and wherein sheath (104) has different outer diameter that vary along a length of the sheath (104). 30
Classification: Confidential
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5.
The cylinder block assembly (100) as claimed in claim 2, wherein the sheath (104) is removably configured in the cylinder barrel (102), and wherein a gap is created between the inner surface of the cylinder barrel (102) and the outer surface of the sheath (104) above the annular 5 protrusion (110).
6.
The cylinder block assembly (100) as claimed in claim 1, wherein the sheath (104) comprises a plurality of annular grooves (112) on the outer surface of the sheath (104), wherein the plurality of annular grooves (112) 10 are disposed below the annular protrusion (110), wherein the plurality of annular grooves (112) are separated by at least one solid radial region, and wherein the plurality of toric joints (106) are disposed in the plurality of annular grooves (112).
15
7.
The cylinder block assembly (100) as claimed in claim 1, wherein the plurality of toric joints (106) are provided using O-rings.
8.
The cylinder block assembly (100) as claimed in claim 1, wherein the sheath (104) is made up of aluminium, and wherein the sheath (104) is 20 configured to act as a guiding member for installing the piston assembly.
9.
The cylinder block assembly (100) as claimed in claim 1, wherein the sheath (104) is machined separately and assembled on the cylinder barrel (102) along with the plurality of toric joints (106), and wherein a portion 25 of the sheath (104) is extended below the cylinder barrel (102).
10.
The cylinder block assembly (100) as claimed in claim 1, wherein the sheath (104) comprises a top portion and a bottom portion, wherein the top portion is configured to mate with a cylinder head, and wherein the bottom 30
portion
of the sheath (104) and a bottom portion of the cylinder barrel (102) are covered with a crank case.