Description:FORM 2
THE PATENTS ACT 1970
39 OF 1970
&
THE PATENT RULES 2003
COMPLETE SPECIFICATION
(SEE SECTIONS 10 & RULE 13)
1. TITLE OF THE INVENTION

“A VALVE TRAIN SYSTEM FOR USE IN A COMBUSTION ENGINE FOR RUST PREVENTION”
2. APPLICANTS (S)
NAME NATIONALITY ADDRESS

MARUTI SUZUKI INDIA LIMITED
Indian
1, Nelson Mandela Road, Vasant Kunj,
New Delhi – 110070, India
3. PREAMBLE TO THE DESCRIPTION

COMPLETE SPECIFICATION

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

 
A VALVE TRAIN SYSTEM FOR USE IN A COMBUSTION ENGINE FOR RUST PREVENTION
TECHNICAL FIELD
[0001] The present disclosure belongs to an internal combustion engine of a vehicle. In particular, the present disclosure relates to a valve train system for use in the combustion engine of the vehicle, where a valve guide is designed and developed in order to improve corrosion resistance of exhaust valves.
BACKGROUND
[0002] Figure 1 depicts a valve train system (120) in an internal combustion engine of a vehicle includes components as required to regulate flow of gases into and out of combustion chamber. The components may include valves along with related components required to allow the air-fuel mixture to enter the combustion chamber, seal the combustion chamber during compression and combustion, and evacuate exhaust gases when combustion is complete. This function is particularly performed by exhaust valves, where exhaust valves are configured to open and close the exhaust port passage for scavenging exhaust gases from the cylinder.
[0003] An exhaust valve (122), as shown in an enlarged version of Figure 1, comprises of a tip (122-1), a groove (122-2), a stem (122-3), scrapper (122-5), a valve seat (122-6) and a head (122-7). Moreover, the exhaust valve (122) is made up of martensitic steel (SUH 11) above a weld joint (122-4) and austenitic steel (SUH 35) below the weld joint (122-4). Though SUH 11 provides high hardness and good strength even at low temperatures, it has got limited corrosion resistive property. SUH 35, on the other hand possesses high corrosion and heat resistance.
[0004] In an existing arrangement, the exhaust valve (122) is prone to corrosion due to formation of excessive moisture during combustion of CNG, which eventually leads to corrosion of SUH 11 due to its limited anti corrosive property. This further results into poor lubrication in an existing valve guide due to blockage of oil pours in the valve guide, eventually resulting into excessive wear of the valve guide. Consequently, there occurs leakage of combustion charge from the valve seat area (122-6), thus decreasing power output of the engine and also impacting fuel efficiency of the vehicle.
[0005] Therefore, in order to circumvent the challenges witnessed above, the valve train system (120), especially, the exhaust valve (122) and the valve guide needs to be suitably designed.

OBJECTS OF THE INVENTION
[0006] Some of the objects of the present disclosure, which at least one embodiment herein satisfy, are listed herein below.
[0007] It is an object of the present subject matter to overcome the aforementioned and other drawbacks existing in the prior art systems and methods.
[0008] It is a principal object of the present disclosure to design and develop a valve train system so as to improve corrosion resistance of the exhaust valves.
[0009] It is another significant object of the present disclosure to design and develop a valve guide for use in a combustion engine of a vehicle such that the valve guide is able to improve corrosion resistance of exhaust valves present in a valve train system of the engine.
[0010] It is another object of the present disclosure to design and develop the valve guide such that the valve guide is able to facilitate draining of water and like fluids uniform.
[0011] It is another object of the present disclosure to design and develop the valve guide such that the valve guide is able to provide abundant support to the exhaust valves so as to avoid vibration and abrasive wear and tear.
[0012] It is yet another object of the present disclosure to design and develop the valve guide such that the valve guide is capable of providing better heat decapitation than the existing arrangements.
[0013] It is yet another object of the present disclosure to design and develop the valve guide such that lubrication holding capacity of the valve guide in enhanced in comparison to the existing arrangements.
[0014] It is even another object of the present disclosure to design and develop the valve guide such that the valve guide is rigid and robust.
[0015] 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 accompanied drawings in which preferred embodiments of the present subject matter are illustrated.
SUMMARY OF THE INVENTION
[0016] This summary is provided to introduce concepts related to a valve train system for use in a combustion engine of a vehicle. The concepts are further described below in the detailed description. This summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used to limit the scope of the claimed subject matter.
[0017] According to an embodiment of the present subject matter, there is provided the valve train system for use in a combustion engine of a vehicle.
[0018] In an aspect, the valve train system comprises one or more exhaust valves, having a first portion and a second portion, and a valve guide housing a portion of the one or more exhaust valves.
[0019] In an aspect, the valve guide is having an outer surface, an inner surface, where the inner surface is defining a mesh structure to facilitate draining of water and like fluids from all sides of a valve to prevent corrosion of the one or more exhaust valves.
[0020] In an aspect, the first portion of the one or more exhaust valves is made up of austenitic steel or like materials, and the valve guide houses a segment of the first portion of the one or more exhaust valves.
[0021] In an aspect, the second portion of the one or more exhaust valves is made up of martensitic steel and like materials.
[0022] In an aspect, the valve guide resembles a hollow cylindrical structure.
[0023] In an aspect, the mesh structure of the inner surface of the valve guide defines a plurality of diverging patterns and a plurality of converging patterns coupled to each other so as to form a plurality of channels for facilitating pathway of water and like fluids out of the one or more exhaust valves.
[0024] In an aspect, the plurality of channels is uniformly distributed to enable flow of water and like fluids from all directions of the exhaust valve.
[0025] In an aspect, a top portion of the valve guide is configured to define a weld joint to facilitate friction welding of first portion with the second portion of the one or more exhaust valves.
[0026] In an aspect, the mesh structure is provided across one-third (1/3rd) of total length of the valve guide from bottom.
[0027] To further understand the characteristics and technical contents of the present subject matter, a description relating thereto will be made with reference to the accompanying drawings. However, the drawings are illustrative only but not used to limit the scope of the present subject matter.
[0028] Various objects, features, aspects, and advantages of the inventive subject matter will become more apparent from the following detailed description of preferred embodiments, along with the accompanying drawing figures in which numerals represent like components.

BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWING(S)
[0029] 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 invention may admit to other equally effective embodiments. A detailed description is given 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 refer 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
[0030] Figure 1 illustrates a valve train system of a combustion engine;
[0031] Figure 2 depicts a valve guide in the valve train system of the combustion engine in accordance with an embodiment of the present disclosure;
[0032] Figure 3 (a-b) depicts a comparison of design of the exhaust valve with that of the existing arrangement in accordance with an embodiment of the present disclosure;
[0033] Figure 4 (a) depicts an isometric view of the valve guide in accordance with an embodiment of the present disclosure; and
[0034] Figure 4 (b) depicts a cross section of the inner surface of the valve guide, also showing mesh like arrangement in accordance with an embodiment of the present disclosure.
[0035] The figures depict embodiments of the present subject matter for the purposes of 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
[0036] A few aspects of the present disclosure are explained in detail below with reference to the various figures. Example implementations are described to illustrate the disclosed subject matter, not to limit its scope, which is defined by the claims. Those of ordinary skill in the art will recognize a number of equivalent variations of the various features provided in the description that follows.
[0037] While the embodiments of the disclosure are subject to various modifications and alternative forms, specific embodiment thereof have 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 alternatives falling within the scope of the disclosure.
[0038] The terms “comprises”, “comprising”, or any other variations thereof used in the disclosure, are intended to cover a non-exclusive inclusion, such that a device, 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 or device proceeded by “comprises… a” does not, without more constraints, preclude the existence of other elements or additional elements in the system or device.
[0039] The present disclosure is related to a valve train system (200) for use in a combustion engine of a vehicle. Herein, an exhaust valve and a valve guide of the valve train system (200) has been designed and developed so as to prevent corrosion and facilitate draining of water and like fluids from all sides of the valve. The salient features of the arrangement are disclosed in the subsequent sections.
[0040] Figure 2 depicts the valve guide (100) in the valve train system (200) of the combustion engine in accordance with an embodiment of the present disclosure. The valve train system (100) may comprise of one or more exhaust valves (202) and the valve guide (100). Herein, the one or more exhaust valves (202) also comprises of a tip (212), a groove (214), a stem (216), a scrapper (218), a valve seat (220) and a head (222).
[0041] In an aspect, further referring to Figure 2 and Figure 3, it may be observed that the valve guide (100) is housing a portion of the one or more exhaust valves (202).
[0042] In an aspect, the one or more exhaust valves (202) may comprise of a first portion (202-1) and a second portion (202-2) welded to each other, with the welded joint (224) shown in Figure 2.
[0043] In an aspect, the first portion (202-1) of the one or more exhaust valves (202) is made up of austenitic steel (SUH 35) or like materials. The second portion (202-2), on the other hand is made up of martensitic steel (SUH 11) and like materials.
[0044] In an aspect, referring to Figure 3 (b), it may be witnessed a top portion (100-T) of the valve guide (100) is configured to define a weld joint (204) in order to facilitate friction welding of the first portion (202-1) with the second portion (202-2) of the one or more exhaust valves (202).
[0045] Referring to Figure 3 and Figure 4 (a-b), it may be observed that the valve guide (100) is housing a portion of the one or more exhaust valves (202), preferably, the valve guide (100) is housing a segment of the first portion (202-1) of the one or more exhaust valves (202).
[0046] In an aspect, referring to Figure 4 (a) and 4 (b), it may be observed that the valve guide (100) is a cylindrical hollow structure and comprises of an outer surface (102) and an inner surface (104).
[0047] In an aspect, as can be witnessed from Figure 4, the inner surface (104) of the valve guide (100) is defining a mesh structure (106), where the mesh structure (106) is configured to facilitate draining of water and like fluids from all sides of the one or more exhaust valves (202) to prevent corrosion of the one or more exhaust valves (202).
[0048] In an aspect, as shown in Figure 4 (b), the mesh structure (106) of the inner surface (104) of the valve guide (100) defines a plurality of diverging patterns (108) and a plurality of converging patterns (110) coupled to each other. This arrangement further defines a plurality of channels for facilitating pathway of water and like fluids or any other abrasive material out of the one or more exhaust valves (202). Herein, the plurality of channels formed are uniformly distributed so as to allow water and like fluids to pass from all directions of the one or more exhaust valves (202).
[0049] Therefore, it is evident from Figure 3 and Figure 4, that corrosion of the one or more exhaust valves (202) can be prevented owing to presence of the valve guide (100) with the mesh structure (106) and also due to presence of the anti-corrosive first portion (202-1) of the one or more exhaust valves (202), where the anti-corrosive first portion (202-1) is housed by the valve guide (100).
[0050] In an aspect, the mesh structure (106) is provided across one-third (1/3rd) of total length of the valve guide (100) from bottom.
[0051] In an aspect, combination of the mesh structure (106) of the valve guide (100) and the first portion (202-1) of the one or more exhaust valves (202) further increases lubrication holding capacity and also facilitates better heat decapitation due to an enhanced surface area and formation of the plurality of channels for draining of water and like fluids.
[0052] In an aspect, the mesh structure (106) of the inner surface (104) of the valve guide (100) aids in improvement of oil storing capacity of valve due to presence of the plurality of channels as it will increase the surface area which will provide more lubricant storing capacity, thereby reducing wear and tear of the one or more exhaust valves (202).
[0053] Therefore, in this manner, the valve train system (200) disclosed in the present disclosure is helping to prevent corrosion and is also additionally providing suitable lubrication to the one or more exhaust valves (202).
Technical Advantages
[0054] All in all, the present invention has the following advantages:
i) Prevents corrosion of the one or more exhaust valves (202)
ii) The mesh structure (106) provides abundant support to the one or more exhaust valves (202) so as to avoid vibration and abrasive wear and tear
iii) The mesh structure (106) facilitates draining of water and like fluids from all sides of the one or more exhaust valves (202)
iv) The plurality of channels formed in the mesh structure (106) aids in removal of water droplets faster than the existing arrangements
v) The mesh structure (106) provides better heat decapitation
vi) The mesh structure (106) increases lubrication facility
vii) The arrangement is rigid and robust
Equivalents
[0055] It should be noted that the description and figures merely illustrate the principles of the present subject matter. It should be appreciated by those skilled in the art that 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 subject matter. It should also be appreciated by those skilled in the art that by devising various systems that, although not explicitly described or shown herein, embody the principles of the present subject matter and are included within its spirit and scope. Furthermore, all examples recited herein are principally intended expressly to be for pedagogical purposes to aid the reader in understanding the principles of the present subject matter and the concepts contributed by the inventor(s) to furthering the art and are to be construed as being without limitation to such specifically recited examples and conditions. The novel features which are believed to be characteristic of the present subject matter, both as to its organization and method of operation, together with further objects and advantages will be better understood from the above-mentioned description when considered in connection with the accompanying figures.
[0056] Although embodiments for the present subject matter have been described in language specific to package features, it is to be understood that the present subject matter is not necessarily limited to the specific features described. Rather, the specific features and methods are disclosed as embodiments for the present subject matter. Numerous modifications and adaptations of the system/device of the present invention will be apparent to those skilled in the art, and thus it is intended by the appended claims to cover all such modifications and adaptations which fall within the scope of the present subject matter.
[0057] 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.”
[0058] 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 invention contemplates all these combinations. Unless stated otherwise, dimensions and geometries of the various structures depicted herein are not intended to be restrictive of the invention, and other dimensions or geometries are possible. In addition, while a feature of the present invention 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 invention. The present invention 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.
, Claims:We Claim:

1. A valve train system (200) for use in a combustion engine of a vehicle, the valve train system (200) comprising:
- one or more exhaust valves (202), having a first portion (202-1) and a second portion (202-2); and
- a valve guide (100) housing a portion of the one or more exhaust valves (202), wherein the valve guide (100) is having
an outer surface (102),
an inner surface (104), wherein the inner surface (104) is defining a mesh structure (106) to facilitate draining of water and like fluids from all sides of the one or more exhaust valves (202) to prevent corrosion of the one or more exhaust valves (202).

2. The valve train system (200) as claimed in claim 1, wherein the first portion (202-1) of the one or more exhaust valves (202) is made up of austenitic steel or like materials, and wherein the valve guide (100) houses a segment of the first portion (202-1) of the one or more exhaust valves (202).

3. The valve train system (200) as claimed in claim 1, wherein the second portion (202-2) of the one or more exhaust valves (202) is made up of martensitic steel and like materials.

4. The valve train system (200) as claimed in claim 1, wherein the valve guide (100) resembles a hollow cylindrical structure.

5. The valve train system (200) as claimed in claim 1, wherein the mesh structure (106) of the inner surface (104) of the valve guide (100) is defining a plurality of diverging patterns (108) and a plurality of converging patterns (110) coupled to each other so as to form a plurality of channels for facilitating pathway of water and like fluids out of the one or more exhaust valves (202).

6. The valve train system (200) as claimed in claim 5, wherein the plurality of channels is uniformly distributed to enable flow of water and like fluids from all directions of the one or more exhaust valves (202).

7. The valve train system (200) as claimed in claim 1, wherein a top portion (100-T) of the valve guide (100) is configured to define a weld joint (204) to facilitate friction welding of first portion (202-1) with the second portion (202-2) of the one or more exhaust valves (202).

8. The valve guide (100) as claimed in claim 1, wherein the mesh structure (106) is provided across one-third (1/3rd) of total length of the valve guide (100) from bottom.

Dated this 18th day of March, 2024

SONAL MISHRA
IN/PA – 3929
OF L. S. DAVAR & CO.,
APPLICANT’S AGENT