FORM 2
THE PATENTS ACT 1970
[39 OF 19701
&
THE PATENTS RULES, 2003
COMPLETE SPECIFICATION
[See Section 10; rule 13] "AN EXHAUST GAS RECIRCULATION VALVE"
ADVIK HI-TECH PVT. LTD.
an Indian private Limited Company,
Plot No. B-5, Chakan Industrial Area, Phase II,
Village-Vasuli, Tal-Khed,
Dist-Pune, Pin-410501
Email: cie@advik.co.in
#
The following specification particularly describes the invention and the manner in
which it is to be performed.

FIELD OF INVENTION
[0001] The present invention relates to an exhaust gas recirculation system, and more particularly the present invention relates to the exhaust gas recirculation valve.
BACKGROUND OF THE INVENTION
[0002] An emission of air pollutants such as hydrocarbons, carbon monoxide, nitrogen oxide, sulphur oxide etc. in atmosphere have shown severe effects on health of living organism and environment. In past few decades the emission standards have been introduced throughout the globe. The emission standards define the acceptable limit of release of air pollutants into atmosphere. To follow the emission standards set by the governments of respective countries the use of emission control system has become mandatory. There are numerous emission control system have been used in the modern vehicles. An exhaust gas recirculation system is one of them.
[0003] The exhaust gas recirculation system is a system (here onwards referred as EGR system) that allows the exhaust gases to be recirculated back into the intake manifold. This process lead to a significant reduction in Nitrogen Oxides emission, as it reduces excess oxygen inside the combustion chamber and combustion temperature. The EGR system reduces the combustion temperature by diverting a small portion of exhaust gases back into the intake manifold. The exhaust gas recirculation valve (here onwards referred as EGR valve) plays vital role in exhaust gas recirculation system. The EGR valve connects the exhaust manifold to the intake manifold. Generally EGR valve remains in normally closed condition. The EGR valve begins functioning once engine has started. It regulates the flow of exhaust gases in proportion with the speed of vehicle. Once the vehicle speed slows down, the engine stops and EGR valve returns to its normally closed condition.

[0004] Referring to Fig. 1, a conventional EGR valve (100) is shown. Conventionally the EGR valve includes a body (110), an inlet (120a), an outlet (120b), a flow cavity (120c), a plunger (130), a guiding means (130a) and an actuation mechanism (140) etc. During open state of the EGR valve (100), the exhaust gas enters through the inlet (120a), travels through flow cavity (120c) and exits through the outlet (120b). The exhaust gas includes carbon particulate resulting from the incomplete combustion of fuel inside the engine. The major problem in the conventional EGR valve is that, some of the carbon particulate enters inside the gap between the plunger (130) and the guiding means (130a) causing deposition therein. Such undesirable deposition of carbon particulates restrict the movement of the plunger that possibly makes EGR valve inoperable. As a result, overall engine performance as well as emission standard requirements of the vehicle also get deteriorated.
[0005] To overcome aforementioned drawbacks those are present in the conventional EGR valve, there is a need of the EGR valve that mitigates undesirable deposition of carbon particulates inside EGR valve.
OBJECTS OF THE INVENTION
[0006] The main object of a present invention is to provide an exhaust gas recirculation valve.
[0007] The another object of the present invention is to provide the exhaust gas recirculation valve that mitigates undesirable deposition of carbon particulates in the vicinity of the plunger.
[0008] The another object of the present invention is to provide the exhaust gas recirculation valve that is cost effective.
[0009] The another object of the present invention is to provide the exhaust gas recirculation valve that improves overall efficiency of engine.

SUMMARY
[00010] An exhaust gas recirculation valve includes a body (210) having at least one inlet (220a), at least one outlet (220b) and at least one flow cavity (220c), a plunger (230), a guiding means (240) so as to guide an axial movement of the plunger (230), an actuation mechanism (270) and a protection plate (280). The protection plate (280) is adapted to reduce the entry and subsequent deposition of the carbon particulates inside a gap between the plunger (230) and the guiding means (240). The protection plate (280) is a bent plate having first arm (280a) and a second arm (280b).The protection plate (280) is mounted inside the flow cavity (220c) such that the first arm is (280a) is axially aligned with the plunger (230) and fixed to wall of the flow cavity (220c), wherein the second end (280b) is horizontally inclined inside the flow cavity (220c).The second arm (280b) of the protection plate (280) is having a through hole so as to accommodate the axial displacement of plunger (230). The protection plate (280) is mounted inside the flow cavity (220c) so as to effectively divert the exhaust gas entered through the inlet (220a) towards the outlet (220b).
BRIEF DESCRIPTION OF THE DRAWINGS
[00011] The accompanying drawings constitute a part of the description and are used to provide further understanding of the present invention. Such accompanying drawings illustrate the embodiments of the present invention which are used to describe the principles of the present invention together with the description.
[00012] Fig. 1 shows a cross sectional view of a conventional exhaust gas recirculation valve disclosed in the prior art;
[00013] Fig. 2a shows a front perspective view of an exhaust gas recirculation valve in accordance with the preferred embodiment of a present invention; and

[00014] Fig. 2b shows a cross sectional view of the exhaust gas recirculation valve in close condition in accordance with the preferred embodiment of the present invention.
[00015] Fig. 2c shows a cross sectional view of the exhaust gas recirculation valve in open condition in accordance with the preferred embodiment of the present invention.
DETAILED DESCRIPTION OF THE INVENTION
[00016] As used in the description herein, the meaning of "a," "an," and "the" includes plural reference unless the context clearly dictates otherwise. Also, as used in the description herein, the meaning of "in" includes "in" and "on" unless the context clearly dictates otherwise.
[00017] If the specification states a component or feature "may", "can", "could", or "might" be included or have a characteristic, that particular component or feature is not required to be included or have the characteristic.
[00018] Exemplary embodiments will now be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments are shown. This disclosure may however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. These embodiments are provided so that this disclosure will be through and will fully convey the scope of the disclosure to those of ordinary skill in the art. Moreover, all statements herein reciting embodiments of the disclosure, as well as specific examples thereof, are intended to encompass both structural and functional equivalents thereof. Additionally, it is intended that such equivalents include both currently known equivalents as well as equivalents developed in the future (i.e., any elements developed that perform the same function, regardless of structure).
[00019] Fig. 2a shows a front perspective of an exhaust gas recirculation valve (200) in accordance with the preferred embodiment of a present invention. Fig. 2b

and Fig 2c show a cross sectional view of an exhaust gas recirculation valve (200) in closed condition and open condition respectively in accordance with the preferred embodiment of a present invention.
[00020] Referring to Fig. 2a through Fig. 2c the exhaust gas recirculation valve includes a body (210), an inlet (220a), an outlet (220b), a flow cavity (220c), a plunger (230), a guiding means (240), a spring (250), a diaphragm (260), an actuation mechanism (270) and a protection plate (280). The actuation mechanism (270) is configured to enable displacement of the plunger (230) in the axial direction. The axial displacement of the plunger (230) results in opening and closing of the valve (200).
[00021] The protection plate (280) is a bent plate having a first arm (280a) and a second arm (280b), wherein the second edge (280b) is having a through-hole to accommodate the axial displacement of the plunger (230). The protection plate (280) is mounted inside the flow cavity (220c) such that the first arm is (280a) is axially aligned with the plunger (230), wherein the second end (280b) is horizontally inclined inside the flow cavity. The said arrangement helps to effectively divert the exhaust gas entered through the inlet (220a) directly towards the outlet (220b). The protection plate (280) is adapted to reduce the entry and subsequent deposition of the carbon particulates (present in the exhaust gas) inside the gap between the plunger (230) and the guiding means (240).
[00022] Referring to Fig. 2b and Fig. 2c the operational characteristics of the exhaust gas recirculation valve is explained. The exhaust gas recirculation valve (200) is configured to remain in normally closed condition as shown in Fig. 2b. When the exhaust gas recirculation valve (200) receives electrical input the actuation mechanism (270) enables axial displacement of the plunger (230). As a result, exhaust gas flow path from the inlet (220a) to the outlet (220b) via the flowing cavity (220c) becomes open to recirculate the exhaust gas to the internal combustion engine as shown in Fig. 2c. The protection plate (280) guides the amount of exhaust gas entered inside the flowing cavity (220c) towards the outlet

(220b), thus helps to reduce the entry of the carbon particulates inside the gap between plunger (230) and the guiding means (240).
[00023] In the above detailed description, reference is made to the accompanying drawings that form a part thereof, and illustrate the best mode presently contemplated for carrying out the invention. However, such description should not be considered as any limitation of scope of the present invention. The structure thus conceived in the present description is susceptible of numerous modifications and variations, all the details may furthermore be replaced with elements having technical equivalence.
[00024] List of reference numerals:
1. A exhaust gas recirculation valve (200)
2. A housing (210)
3. A connector (210a)
4. An inlet (220a)
5. An outlet (220b)
6. A flowing cavity (220c)
7. A plunger (230)
8. A guiding means (240)
9. A spring (250)
10. A diaphragm (260)

11. An actuation mechanism (270)
12. A protection plate (280)
13. A first arm (280a) (Not shown in Fig.)
14. A second arm (280b) (Not shown in Fig.)

CLAIMS We claim,
1. An exhaust gas recirculation valve comprising:
A body (210) having at least one inlet (220a), at least one outlet (220b) and at least one flow cavity (220c);
A plunger (230);
A guiding means (240) so as to guide an axial movement of the plunger (230);
An actuation mechanism (270); and
A protection plate (280).
2. The exhaust gas recirculation valve as claimed in claim 1, wherein the protection plate (280) is adapted to reduce the entry and subsequent deposition of the carbon particulates inside a gap between the plunger (230) and the guiding means (240).
3. The exhaust gas recirculation valve as claimed in claim 1, wherein the protection plate (280) is a bent plate having first arm (280a) and a second arm (280b).
4. The exhaust gas recirculation valve as claimed in claim 3, wherein the protection plate (280) is mounted inside the flow cavity (220c) such that the first arm is (280a) is axially aligned with the plunger (230) and fixed to wall of the flow cavity (220c), wherein the second end (280b) is horizontally inclined inside the flow cavity (220c).

5. The exhaust gas recirculation valve as claimed in claim 4, wherein the second arm (280b) of the protection plate (280) is having a through hole so as to accommodate the axial displacement of plunger (230).
6. The exhaust gas recirculation valve as claimed in claim 4, wherein the protection plate (280) is mounted inside the flow cavity (220c) so as to effectively divert the exhaust gas entered through the inlet (220a) towards the outlet (220b).