Description:FORM 2
THE PATENTS ACT, 1970
(39 of 1970)
&
THE PATENTS RULES, 2003

COMPLETE SPECIFICATION
[See section 10, Rule 13]

A SHIELDING DEVICE FOR AN EXHAUST SYSTEM OF A VEHICLE

MAHINDRA & MAHINDRA LIMITED, A COMPANY REGISTERED UNDER THE INDIAN COMPANIES ACT, 1913, HAVING ADDRESS AT MAHINDRA RESEARCH VALLEY (MRV), MAHINDRA WORLD CITY, PLOT NO.41/1, ANJUR P.O., CHENGALPATTU, KANCHIPURAM DISTRICT, TAMILNADU – 603004, INDIA

THE FOLLOWING SPECIFICATION PARTICULARLY DESCRIBES THE INVENTION AND THE MANNER IN WHICH IT IS TO BE PERFORMED.

TECHNICAL FIELD OF THE INVENTION
The present disclosure relates to a shielding device for an exhaust system of a vehicle, particularly relates to the shielding device for the exhaust system of a single cylinder light commercial vehicle
BACKGROUND OF THE INVENTION
Generally, an exhaust system of a vehicle includes an after-treatment system and one or more exhaust sensor to detect presence of harmful gases in exhaust gas. These exhaust sensors are typically installed near an outlet of an exhaust pipe to compare the residual oxygen content in the exhaust with the oxygen level of the ambient air and identify the transition from a rich mixture (lack of air) to a lean mixture (excess air) and vice versa.These exhaust sensors are very sensitive to water and/or mud and are very prone to get damaged.
In vehicles, particularly light commercial vehicles, the engine may be located at the rear or under the load bed. Due to lower ground clearence, there is high chance of water entering into the exhaust system through the outlet of the exhaust pipe. The water may enter into the exhaust system from vehicle washing, rain, floods, water splashes that comes from vehicle tire, and the like. Further, the exhaust pipe is positioned in such a way that even a small amount of water entry into the exhaust system may result in exhaust sensor damage. Thus, there is need of a device to externally shield the exhaust system which will prevent the water entry into the exhaust pipe outlet from all the sources in every possible direction.

SUMMARY OF THE INVENTION
In one aspect of the present invention, a shielding device for an exhaust system of a vehicle is provided. The shielding device includes a first cover disposed at an outlet of an exhaust pipe of the exhaust system. The first cover includes a first section proximate the outlet of the exhaust pipe. The first cover also includes a second section opposite to the first section and having an inwardly tilted first flap. The first cover further includes a body part between the first section and the second section. The shielding device also includes a second cover disposed at the outlet of the exhaust pipe corresponding to the first cover. The second cover includes a first section proximate the outlet of the exhaust pipe. The second cover also includes a second section opposite to the first section and having an inwardly tilted second flap extending over the first flap of the first cover. The second cover further includes a body part between the first section and the second section. The the first flap and the second flap form a conch like structure towards the second sections thereby eliminating entry of foreign particles into the exhaust system.
According to the present invention, the first section of the first cover has a substantially semicircular shape corresponding to a shape of the outlet of the exhaust pipe.
According to the present invention, the body part of the first cover between the first section and the second section has an inverted L-shaped structure.
According to the present invention, the first section of the second cover has a substantially semicircular shape corresponding to the shape of the outlet of the exhaust pipe.
According to the present invention, the body part of the second cover between the first section and the second section has an inverted L-shaped structure.
According to the present invention, the first cover is mounted on an exhaust after treatment system of the vehicle.
According to the present invention, the second cover is mounted on a transmission housing of the vehicle.
According to the present invention, the foreign particles include one or more of water, mud, debris, and the like.
According to the present invention, the first flap and the second flap guide and discharge an exhaust gas in a first direction from the exhaust pipe.
According to the present invention, the shielding device has baffles to prevent entry of water from outside to the exhaust pipe.

BRIEF DESCRIPTION OF THE DRAWING
FIG. 1 illustrates a perspective view of an exhaust system of a vehicle;
FIG. 2 illustrates a perspective view of the exhaust system of the vehicle and a shielding device assembled therewith;
FIG. 3 illustrates a cross sectional view of the shielding device associated with FIG. 2;
FIG. 4 illustrates a first perspective view of a first cover of the shielding device;
FIG. 5 illustrates a second perspective view of the first cover of the shielding device;
FIG. 6 illustrates a first perspective view of a second cover of the shielding device; and
FIG. 7 illustrates a second perspective view of the second cover of the shielding device.

DETAILED DESCRIPTION OF THE INVENTION
Embodiments, of the present disclosure, will now be described with reference to the accompanying drawing.
Embodiments are provided so as to thoroughly and fully convey the scope of the present disclosure to the person skilled in the art. Numerous details are set forth relating to specific components to provide a complete understanding of embodiments of the present disclosure. It will be apparent to the person skilled in the art that the details provided in the embodiments should not be construed to limit the scope of the present disclosure. In some embodiments, well-known processes, well-known apparatus structures, and well-known techniques are not described in detail.
The terminology used, in the present disclosure, is only for the purpose of explaining a particular embodiment and such terminology shall not be considered to limit the scope of the present disclosure. As used in the present disclosure, the forms “a,” “an,” and “the” may be intended to include the plural forms as well, unless the context clearly suggests otherwise. The terms “comprises,” “comprising,” “including,” and “having,” are open ended transitional phrases and therefore specify the presence of stated elements, modules, units and/or components, but do not forbid the presence or addition of one or more other elements, components, and/or groups thereof.
FIG. 1 illustrates an exhaust system (100) of a vehicle (not shown). The exhaust system (100) is used to guide exhaust gases away from a controlled combustion inside an engine of the vehicle. The entire system conveys exhaust gases from the engine and includes one or more exhaust pipes (102).
The exhaust system (100) includes an exhaust after treatment system (104). The exhaust after treatment system (104) is used for carrying substrates with precious metals which reacts with exhaust gas and help in conversion of the gases into clean gases. The exhaust system (100) also includes one or more exhaust sensor (106). The exhaust sensor (106) senses the exhaust gas components and provides signal to an engine control unit (not shown). In particular, the exhaust sensor (106) compares the residual oxygen content in the exhaust with the oxygen level of the ambient air and identifies the transition from a rich mixture (lack of air) to a lean mixture (excess air) and vice versa. The exhaust sensor (106) is typically disposed proximate the exhaust pipe (102) as illustrated in FIG. 1.
FIGS. 2 and 3 illustrate a shielding device (108) assembled on the exhaust pipe (102). The shielding device (108) includes a first cover (110) disposed at an outlet of an exhaust pipe (102) of the exhaust system (100). The first cover (110) is mounted on the exhaust after treatment system (104) of the vehicle. The first cover (110) is mounted with the help of a first mounting (111) which is clubbed along with exhaust after treatment system (104). The shielding device (108) also includes a second cover (112) disposed at the outlet of the exhaust pipe (102) corresponding to the first cover (110). The second cover (112) is mounted on a transmission housing of the vehicle. The second cover (112) is positioned over the first cover (110) and mounted on the transmission housing with a second mounting (113). The first cover (110) and the second cover (112) are overlapped on each other.
FIGS. 4 and 5 illustrate the first cover (110) of the shielding device (108). The first cover (110) includes a first section (110a) proximate the outlet of the exhaust pipe (102) and having a substantially semicircular shape corresponding to a shape of the outlet of the exhaust pipe (102). The first cover (110) also includes a second section (110b) opposite to the first section (110a) and having an inwardly tilted first flap (114). The first cover (110) further includes a body part between the first section (110a) and the second section (110b). The body part has an inverted L-shaped structure.
FIGS. 6 and 7 illustrate the second cover (112) of the shielding device (108). The second cover (112) includes a first section (112a) proximate the outlet of the exhaust pipe (102) and having a substantially semicircular shape corresponding to the shape of the outlet of the exhaust pipe (102). The second cover (112) also includes a second section (112b) opposite to the first section (112a) and having an inwardly tilted second flap (116) extending over the first flap (114) of the first cover (110). The second cover (112) further includes a body part between the first section (112a) and the second section (112b). The body part has an inverted L-shaped structure.
As illustrated in FIG. 3, the first flap (114) and the second flap (116) guide and discharge the exhaust gas in a first direction (F) from the exhaust pipe (102) in such a manner that entry of foreign particles into the exhaust system (100) is eliminated. The foreign particles include one or more of water, mud, debris, and the like. The shielding device (108) is designed with baffles in such a way that it prevents entry of the foreign particles, more particularly water, from outside. Further, this configuration helps in proper diversion of exhaust gases which is coming from exhaust pipe (102).
The proposed invention helps to solve major failure issues of the exhaust sensor arising due to water entry into the exhaust after treatment system. Further, this invention is simple in construction and assembly with lower cost and with no changes in the existing design of the exhaust system. This shielding device can be retro-fitted over the existing exhaust system of the vehicle. In case of service, these the shielding device can be easily removed and refitted without disturbing the basic structure.
The embodiments herein and the various features and advantageous details thereof are explained with reference to the non-limiting embodiments in the following description. Descriptions of well-known components and processing techniques are omitted so as to not unnecessarily obscure the embodiments herein. The examples used herein are intended merely to facilitate an understanding of ways in which the embodiments herein may be practiced and to further enable those of skill in the art to practice the embodiments herein. Accordingly, the examples should not be construed as limiting the scope of the embodiments herein.
Any discussion of devices, articles or the like that has been included in this specification is solely for the purpose of providing a context for the disclosure. It is not to be taken as an admission that any or all of these matters form a part of the prior art base or were common general knowledge in the field relevant to the disclosure as it existed anywhere before the priority date of this application.
, Claims:
1. A shielding device (108) for an exhaust system (100) of a vehicle, said shielding device (108) comprising:
a first cover (110) disposed at an outlet of an exhaust pipe (102) of the exhaust system (100), the first cover (110) has:
a first section (110a) proximate the outlet of the exhaust pipe (102);
a second section (110b) opposite to the first section (11) and having an inwardly tilted first flap (114); and
a body part between the first section (110a) and the second section (110b); and
a second cover (112) disposed at the outlet of the exhaust pipe (102) corresponding to the first cover (110), the second cover (112) has:
a first section (112a) proximate the outlet of the exhaust pipe (102);
a second section (112b) opposite to the first section (112a) and having an inwardly tilted second flap (116) extending over the first flap (114) of the first cover (110); and
a body part between the first section (112a) and the second section (112b),
wherein the first flap (114) and the second flap (116) form a conch structure towards the second sections (110b, 112b) thereby eliminating entry of foreign particles into the exhaust system (100).
2. The shielding device (108) as claimed in claim 1, wherein the first section (110a) of the first cover (110) has a substantially semicircular shape corresponding to a shape of the outlet of the exhaust pipe (102).
3. The shielding device (108) as claimed in claim 1, wherein the body part of the first cover (110) between the first section (110a) and the second section (110b) has an inverted L-shaped structure.
4. The shielding device (108) as claimed in claim 1, wherein the first section (112a) of the second cover (112) has a substantially semicircular shape corresponding to the shape of the outlet of the exhaust pipe (102).
5. The shielding device (108) as claimed in claim 1, wherein the body part of the second cover (112) between the first section (112a) and the second section (112b) has an inverted L-shaped structure.
6. The shielding device (108) as claimed in claim 1, wherein the first cover (110) is mounted on an exhaust after treatment system (104) of the vehicle.
7. The shielding device (108) as claimed in claim 1, wherein the second cover (112) is mounted on a transmission housing of the vehicle.
8. The shielding device (108) as claimed in claim 1, wherein the foreign particles include one or more of water, mud, debris.
9. The shielding device (108) as claimed in claim 1, wherein the first flap (114) and the second flap (116) guide and discharge an exhaust gas in a first direction (F) from the exhaust pipe (102).

10. The shielding device (108) as claimed in claim 1, wherein the shielding device (108) has baffles to prevent entry of water from outside to the exhaust pipe (102).