DESC:FORM 2
The Patent Act 1970
(39 of 1970)
&
The Patent Rules, 2005

COMPLETE SPECIFICATION
(SEE SECTION 10 AND RULE 13)

TITLE OF THE INVENTION

“A VALVE FOR PROTECTING A FUEL INJECTOR OF AN ENGINE”

APPLICANT:

Name Nationality Address
Mahindra & Mahindra Limited Indian Mahindra & Mahindra Ltd.,
MRV, Mahindra World City (MWC),
Plot No. 41/1, Anjur Post, Chengalpattu,
Kanchipuram District – 603004 (TN) INDIA

The following specification particularly describes and ascertains the nature of this invention and the manner in which it is to be performed:
TECHNICAL FIELD
[001] The embodiments herein generally relate to internal combustion engines and more particularly but not exclusively to direct injection type fuel injected internal combustion engines.

BACKGROUND
[002] Owing to stringent emission norms and for improving the fuel economy of the vehicle, presently fuel injectors are preferred over the carburetors.
[003] Fuel injectors in direct injection type engines are generally subjected to high temperature and pressure during combustion. Hence the life of the fuel injector is affected. Further, as the fuel injectors are quite expensive, replacement of fuel injectors adds burden to the user. Hence in order to save the fuel injector, a valve is placed in front of the fuel injector to protect the fuel injector.
[004] Though the valve helps in protecting the fuel injector, one of the persisting problems in the existing valve is the minute back flow of combustion gases from the combustion chamber of the engine to the fuel injector that leads to damage of the fuel injector over time.
[005] Therefore, there exists a need for a valve for protecting a fuel injector of an engine. Furthermore, there exists a need for a valve that can eliminate the aforementioned drawbacks.
OBJECTS
[006] The principal object of an embodiment of this invention is to provide a valve for protecting a fuel injector of an engine from high temperature and pressure combustion gases.
[007] Another object of an embodiment of this invention is to provide a valve that can restrict back flow of combustion gases from the combustion chamber to the fuel injector in an engine.
[008] Yet, another object of an embodiment of this invention is to provide a valve that enables even distribution of fuel inside the combustion chamber of the engine.
[009] The objects of the embodiments herein will be better appreciated and understood when considered in conjunction with the following description and the accompanying drawings. It should be understood, however, that the following descriptions, while indicating embodiments and numerous specific details thereof, are given by way of illustration and not of limitation. Many changes and modifications may be made within the scope of the embodiments herein without departing from the spirit thereof, and the embodiments herein include all such modifications.

BRIEF DESCRIPTION OF DRAWINGS
[0010] This invention is illustrated in the accompanying drawings, throughout which like reference letters indicate corresponding parts in the various figures. The embodiments herein will be better understood from the following description with reference to the drawings, in which:
[0011] FIG. 1 depicts a perspective view of a valve according to a first embodiment of the invention as disclosed herein;
[0012] FIG. 2 depicts a cross sectional view of the valve according to a first embodiment of the invention as disclosed herein;
[0013] FIG. 3 depicts a perspective view of a reed petal assembly of the valve according to a first embodiment of the invention as disclosed herein;
[0014] FIG. 4 depicts a perspective view of a valve without the reed petal assembly according to a first embodiment of the invention as disclosed herein;
[0015] FIG. 5 depicts a cross sectional view of the valve assembled to a fuel injector according to a first embodiment of the invention as disclosed herein;
[0016] FIG. 6 depicts a cross sectional view of the valve assembled in the engine according to a first embodiment of the invention as disclosed herein;
[0017] FIG. 7 depicts a perspective view of a piston of the engine according to a first embodiment of the invention as disclosed herein;
[0018] FIG. 8 depicts a cross section view of the valve without the plunger and magnet according to a first embodiment of the invention as disclosed herein;
[0019] FIG. 9 depicts a perspective view of a valve according to a second embodiment of the invention as disclosed herein;
[0020] FIG. 10 depicts a cross sectional view of the valve according to a second embodiment of the invention as disclosed herein;
[0021] FIG. 11 depicts a perspective view of the valve according to a second embodiment of the invention as disclosed herein;
[0022] FIG. 12 depicts a cross sectional view of the valve assembled to a fuel injector according to a second embodiment of the invention as disclosed herein;
[0023] FIG. 13 depicts a cross sectional view of the valve assembled in the engine according to a second embodiment of the invention as disclosed herein;
[0024] FIG. 14 depicts a perspective view of a piston of the engine according to a second embodiment of the invention as disclosed herein; and
[0025] FIG. 15 depicts a cross section view of the valve without the plunger and magnet according to a second embodiment of the invention as disclosed herein.
DETAILED DESCRIPTION
[0026] The embodiments herein and the various features and advantageous details thereof are explained more fully with reference to the non-limiting embodiments that are illustrated in the accompanying drawings and detailed 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.
[0027] The embodiments herein achieve a valve for protecting a fuel injector of an engine from high temperature and pressure combustion gases. Further embodiments herein achieve a valve that can prevent back flow of combustion gases from the combustion chamber to the fuel injector. Referring now to the drawings, and more particularly to FIGS. 1 through 15, where similar reference characters denote corresponding features consistently throughout the figures, there are shown embodiments.
[0028] FIG. 1 depicts a perspective view of a valve according to a first embodiment of the invention as disclosed herein. FIG. 2 depicts a cross sectional view of the valve according to a first embodiment of the invention as disclosed herein. In a first embodiment the valve 500 includes an inlet 502, an entry orifice 504, a plurality of exit orifice 506, a magnet 508, a plunger 510, a reed petal assembly 512, a cap 514, a lower portion 516, a cavity 518 and a plunger seat 520.
[0029] In an embodiment the inlet 502 is adapted for receiving a fuel injector 602 of an engine 600. The inlet 502 receives the fuel injector 602 and is in fluid communication with the fuel injector 602. In an embodiment the fuel injector 602 is used for supplying fuel to the combustion chamber (not shown) of the engine 600. The inlet 502 and the fuel injector 602 is in fluid communication with the entry orifice 504 thereby the fuel (not shown) from the fuel injector 602 enters the entry orifice 504. In an embodiment the fuel injector 602 is a gaseous fuel injector. However, it is also within the scope of the invention to provide a liquid fuel injector without otherwise deterring the intended function of the fuel injector 602 as can be deduced from the description.
[0030] In an embodiment the entry orifice 504 is used for receiving the fuel from the fuel injector 602. The entry orifice 504 is in fluid communication with the fuel injector 602 for receiving the fuel from the fuel injector 602. The entry orifice 504 is in fluid communication with the plurality of exit orifice 506, thereby the fuel from the fuel injector 602 entering the entry orifice 504 exits through the exit orifices 506 and reaches the combustion chamber of the engine 600.
[0031] FIG. 4 depicts a perspective view of a valve without the reed petal assembly according to a first embodiment of the invention as disclosed herein. In an embodiment the plurality of exit orifices 506 are adapted for providing fuel into the combustion chamber of the engine 600. In one embodiment each of the exit orifice 506 is at an angle of 45 degree relative to the longitudinal axis of the valve 500. In another embodiment each of the exit orifice 506 is at an angle ranging from 30 degree to 90 degree relative to the longitudinal axis of the valve 500. However, it is also within the scope of the invention to provide the exit orifice 506 at any other angle without otherwise deterring the intended function of the exit orifice 506 as can be deduced from the description. In an embodiment the valve 500 includes four exit orifices 506. However, it is also within the scope of the invention to provide any number of exit orifice 506 without otherwise deterring the intended function of the valve 500 as can be deduced from the description. In an embodiment the outer portion of the valve 500 having exit orifices 506 is configured into the shape of a truncated cone. However, it is also within the scope of the invention to provide the outer portion of the valve 500 having exit orifices 506 in the shape of a cylinder or any other shape without otherwise deterring the intended function of the valve 500 as can be deduced from the description.
[0032] In an embodiment the magnet 508 is used for lifting the plunger 510 for closing the entry orifice 504 thereby preventing the back flow of combustion gases from the combustion chamber (not shown) of the engine 600 to the fuel injector 602. In an embodiment the magnet 508 is configured into the shape of a circular ring. However, it is also within the scope of the invention to provide the magnet 508 in any other shape without otherwise deterring the intended function of the magnet 508 as can be deduced from the description. In an embodiment the magnet 508 is a permanent magnet. However, it is also within the scope of the invention to provide an electromagnet without otherwise deterring the intended function of the magnet 508 as can be deduced from the description.
[0033] The magnet 508 is received by the cavity 518 of the valve 500. In an embodiment the cavity 518 is configured to match the shape and dimensions of the magnet 508. The cavity 518 is used for holding the magnet 508.
[0034] In an embodiment the plunger 510 is used for closing the entry orifice 504 through the magnet 508 for preventing the back flow of combustion gases from the combustion chamber (not shown) of the engine 600 to the fuel injector 602. The plunger 510 is held between the plunger seat 520 and the cap 514. In an embodiment the plunger 510 is a spherical ball. However, it is also within the scope of the invention to provide the plunger 108 in any other shape without otherwise deterring the intended function of the plunger 510 as can be deduced from the description. The plunger 510 is made from any material compatible with the magnet 508.
[0035] FIG. 3 depicts a perspective view of a reed petal assembly of the valve according to a first embodiment of the invention as disclosed herein. In an embodiment the reed petal assembly 512 includes a plurality of reed petal 512a and a plurality of slit 512b. In an embodiment the reed petals 512a are used for preventing the back flow of combustion gases from combustion chamber (not shown) of the engine 600 to the fuel injector 602 by closing the exit orifices 506. In an embodiment the slits 512b is used for defining the shape of the reed petals 512a and for facilitating the lifting and lowering of the reed petals 512a. The reed petal assembly 512 is used for holding the reed petals 512a.
[0036] The reed petal assembly 512 is provided over the outer portion of the valve 500 having exit orifices 506 such that each of the reed petals 512a cover each of the exit orifices 506. In an embodiment the reed petal assembly 512 is configured to match the shape of the outer portion of the valve 500 having the exit orifices 506. In an embodiment the reed petal assembly 512 is configured into the shape of a truncated cone. However, it is also within the scope of the invention to provide the reed petal assembly 512 in a cylindrical shape or any other shape without otherwise deterring the intended function of the reed petal assembly 512 as can be deduced from the description.
[0037] In an embodiment the cap 514 is used for holding the plunger 510 inside the valve 500. The cap 514 is received by the lower portion 516 of the valve 500.
[0038] In an embodiment the lower portion 516 is used for receiving the plunger 510 and the cap 514. In an embodiment the outer side of the valve 500 having the lower portion 516 is configured into the shape of a hexagon for facilitating the mounting of the valve 500 in the injection port 604 of the engine 600. However, it is also within the scope of the invention to provide the outer side of the valve 500 having lower portion 516 in any other shape without otherwise deterring the intended function of the valve 500 as can be deduced from the description.
[0039] FIG. 8 depicts a cross section view of the valve without the plunger and magnet according to a first embodiment of the invention as disclosed herein. In an embodiment the plunger seat 520 is used for receiving the plunger 510. The plunger 510 rests in the plunger seat 520 for closing the entry orifice 504 when lifted by the magnet 508.
[0040] The working of the valve 500 in conjunction with the engine 600 is as follows. FIG. 5 depicts a cross sectional view of the valve assembled to a fuel injector according to a first embodiment of the invention as disclosed herein. FIG. 6 depicts a cross sectional view of the valve assembled in the engine according to a first embodiment of the invention as disclosed herein. In an embodiment the engine 600 includes a fuel injector 602, an injection port 604, a cylinder 606, a piston 608 and a crankcase (not shown).
[0041] In an embodiment the engine 600 has the injection port 604 provided at the side of a cylinder 606 of the engine 600. First the valve 500 is mounted in the injection port 604 and the fuel injector 602 is provided in fluid communication with the inlet 502 of the valve 500. Normally the plunger 510 is lifted by the magnet 508, thereby the plunger 510 rests in the plunger seat 520 and closes the entry orifice 504. Now during the operation of the engine 600, when the fuel injector 602 sprays fuel and due to the injection pressure the plunger 510 is pushed against the force of the magnet 508 and the plunger 510 unseats from the plunger seat 520 and the entry orifice 504 is opened and the sprayed fuel from the fuel injector 602 enters the entry orifice 504 and reaches the exit orifices 506. Due to the injection pressure of the fuel, the reed petals 512a are lifted and the fuel from the exit orifices 506 reaches the combustion chamber (not shown) of the engine 600. Once the fuel injection is completed, due to the absence of injection pressure the plunger 510 is lifted by the magnet 508 and the plunger 510 rests in the plunger seat 520 and closes the entry orifice 504, thereby preventing the back flow of combustion gases from the combustion chamber (not shown) to the fuel injector 602. Further, due to the absence of injection pressure, the reed petals 512a close the exit orifices 506 to prevent the back flow of combustion gases from the combustion chamber to the fuel injector 602. Thus the valve 500 helps improving the life of the fuel injector 602. In an embodiment the valve 500 is provided in the engine 600 with the reed petal assembly 512. However, it is also within the scope of the invention to provide the valve 500 without the reed petal assembly 512 without otherwise deterring the intended function of the valve 500 as can be deduced from the description.
[0042] FIG. 7 depicts a perspective view of a piston of the engine according to a first embodiment of the invention as disclosed herein. In an embodiment the piston 608 of the engine 600 includes an opening 608a. The opening 608a is used for venting the air-fuel mixture trapped between the piston 608 and the injection port 604 to the crankcase (not shown) of the engine 600 when the piston is at top dead centre position. Thereafter the air-fuel mixture from the crankcase (not shown) is transferred to the combustion chamber of the engine 600 for the next cycle of combustion. However, it is also within the scope of the invention to provide the piston 608 without opening 608a.
[0043] FIG. 9 depicts a perspective view of a valve according to a second embodiment of the invention as disclosed herein. FIG. 10 depicts a cross sectional view of the valve according to a second embodiment of the invention as disclosed herein. FIG. 11 depicts a perspective view of the valve according to a second embodiment of the invention as disclosed herein. In a second embodiment the valve 700 includes an inlet 702, an entry orifice 704, a plurality of exit orifice 706, a magnet 708, a plunger 710, a cap 712, a lower portion 714, a cavity 716 and a plunger seat 718. The valve 700 includes a top end T and a bottom end B.
[0044] FIG. 12 depicts a cross sectional view of the valve assembled to a fuel injector according to a second embodiment of the invention as disclosed herein. In an embodiment the inlet 702 is adapted for receiving a fuel injector 802 of an engine 800. The inlet 702 receives the fuel injector 802 and is in fluid communication with the fuel injector 802. In an embodiment the fuel injector 802 is used for supplying fuel to the combustion chamber (not shown) of the engine 800. The inlet 702 and the fuel injector 802 is in fluid communication with the entry orifice 704 thereby the fuel (not shown) from the fuel injector 802 enters the entry orifice 704. In an embodiment the fuel injector 802 is a liquid fuel injector. However, it is also within the scope of the invention to provide a gaseous fuel injector without otherwise deterring the intended function of the fuel injector 802 as can be deduced from the description.
[0045] In an embodiment the entry orifice 704 is used for receiving the fuel from the fuel injector 802. The entry orifice 704 is in fluid communication with the fuel injector 802 for receiving the fuel from the fuel injector 802. The entry orifice 704 is in fluid communication with the plurality of exit orifice 706, thereby the fuel from the fuel injector 802 entering the entry orifice 704 exits through the exit orifices 706 and reaches the combustion chamber of the engine 800.
[0046] In an embodiment the plurality of exit orifices 706 are adapted for providing fuel into the combustion chamber of the engine 800. In an embodiment each of the exit orifices 706 includes a first portion 706a and a second portion 706b. In an embodiment the first portion 706a of each of the exit orifice 706 is at an angle of 45 degree relative to the longitudinal axis of the valve 700. In another embodiment the first portion 706a of each of the exit orifice 706 is at an angle ranging from 30 degree to 90 degree relative to the longitudinal axis of the valve 700. However, it is also within the scope of the invention to provide the first portion 706a of each of the exit orifice 706 at any other angle without otherwise deterring the intended function of the exit orifice 706 as can be deduced from the description. In an embodiment the second portion 706b of each of the exit orifice 706 is substantially parallel to the longitudinal axis of the valve 700 and the second portion 706b of each of the exit orifice 706 ends/terminates at bottom end B of the valve 700. Thus the fuel coming from the entry orifice 704 travels radially in the first portion 706a of the exit orifice 706 and exits axially through the second portion 706b of the exit orifice 706. In an embodiment the valve 700 includes four exit orifices 706. However, it is also within the scope of the invention to provide any number of exit orifice 706 without otherwise deterring the intended function of the valve 700 as can be deduced from the description.
[0047] In an embodiment the magnet 708 is used for lifting the plunger 710 for closing the entry orifice 704 thereby preventing the back flow of combustion gases from the combustion chamber (not shown) of the engine 800 to the fuel injector 802. In an embodiment the magnet 708 is configured into the shape of a circular ring. However, it is also within the scope of the invention to provide the magnet 708 in any other shape without otherwise deterring the intended function of the magnet 708 as can be deduced from the description. In an embodiment the magnet 708 is a permanent magnet. However, it is also within the scope of the invention to provide an electromagnet without otherwise deterring the intended function of the magnet 708 as can be deduced from the description.
[0048] FIG. 15 depicts a cross section view of the valve without the plunger and magnet according to a second embodiment of the invention as disclosed herein. The magnet 708 is received by the cavity 716 of the valve 700. In an embodiment the cavity 716 is configured to match the shape and dimensions of the magnet 708. The cavity 716 is used for holding the magnet 708.
[0049] In an embodiment the plunger 710 is used for closing the entry orifice 704 through the magnet 708 for preventing the back flow of combustion gases from the combustion chamber (not shown) of the engine 800 to the fuel injector 802. The plunger 710 is held between the plunger seat 718 and the cap 712. In an embodiment the plunger 710 is a spherical ball. However, it is also within the scope of the invention to provide the plunger 108 in any other shape without otherwise deterring the intended function of the plunger 710 as can be deduced from the description. The plunger 710 is made from any material compatible with the magnet 708.
[0050] In an embodiment the cap 712 is used for holding the plunger 710 inside the valve 700. The cap 712 is received by the lower portion 714 of the valve 700. In an embodiment the lower portion 714 is used for receiving the plunger 710 and the cap 712.
[0051] In an embodiment the plunger seat 718 is used for receiving the plunger 710. The plunger 710 rests in the plunger seat 718 for closing the entry orifice 704 when lifted by the magnet 708.
[0052] FIG. 13 depicts a cross sectional view of the valve assembled in the engine according to a second embodiment of the invention as disclosed herein. In an embodiment the engine 800 includes a fuel injector 802, an injection port 804, a cylinder 806, a piston 808 and a crankcase (not shown). In an embodiment the engine 800 has the injection port 804 provided at the side of a cylinder 806 of the engine 800.
[0053] The working of the valve 700 in conjunction with the engine 800 is as follows. First the valve 700 is mounted in the injection port 804 and the fuel injector 802 is provided in fluid communication with the inlet 702 of the valve 700. Normally the plunger 710 is lifted by the magnet 708, thereby the plunger 710 rests in the plunger seat 718 and closes the entry orifice 704. Now during the operation of the engine 800, when the fuel injector 802 sprays fuel, due to the injection pressure the plunger 710 is pushed against the force of the magnet 708 and the plunger 710 unseats from the plunger seat 718 and the entry orifice 704 is opened and the sprayed fuel from the fuel injector 802 enters the entry orifice 704 and reaches the exit orifices 706. Due to the injection pressure of the fuel, the fuel from the exit orifices 706 reaches the combustion chamber (not shown) of the engine 800. Once the fuel injection is completed, due to the absence of injection pressure the plunger 710 is lifted by the magnet 708 and the plunger 710 rests in the plunger seat 718 and closes the entry orifice 704, thereby preventing the back flow of combustion gases from the combustion chamber (not shown) to the fuel injector 802. Thus the valve 700 helps improving the life of the fuel injector 802.
[0054] FIG. 14 depicts a perspective view of a piston of the engine according to a second embodiment of the invention as disclosed herein. In an embodiment the piston 808 of the engine 800 includes an opening 808a. The opening 808a is used for venting the air-fuel mixture trapped between the piston 808 and the injection port 804 to the crankcase (not shown) of the engine 800 when the piston is at top dead centre position. Thereafter the air-fuel mixture from the crankcase (not shown) is transferred to the combustion chamber of the engine 800 for the next cycle of combustion. However, it is also within the scope of the invention to provide the piston 808 without opening 808a.
[0055] The foregoing description of the specific embodiments will so fully reveal the general nature of the embodiments herein that others can, by applying current knowledge, readily modify and/or adapt for various applications such specific embodiments without departing from the generic concept, and, therefore, such adaptations and modifications should and are intended to be comprehended within the meaning and range of equivalents of the disclosed embodiments. It is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation. Therefore, while the embodiments herein have been described in terms of preferred embodiments, those skilled in the art will recognize that the embodiments herein can be practiced with modification within the spirit and scope of the embodiments as described herein.

CLAIMS
We claim,
1. A valve for protecting a fuel injector of an engine, said valve comprising:
an inlet adapted for housing the fuel injector of the engine;
an entry orifice adapted for receiving a fuel from the fuel injector;
a plurality of exit orifices adapted for providing the fuel into a combustion chamber of the engine, said plurality of exit orifices provided in fluid communication with said entry orifice for receiving the fuel;
a plunger adapted to close said entry orifice to prevent the back flow of a combustion gases from the combustion chamber to the fuel injector;
a magnet adapted for lifting said plunger; and
a plunger seat adapted for receiving said plunger,
wherein
said plunger unseats from said plunger seat to open said entry orifice on injection of fuel from the fuel injector and the fuel from said entry orifice exits through said plurality of exit orifices and said plunger rests in said plunger seat through said magnet in absence of fuel injection to close said entry orifice for preventing the back flow of the combustion gases from the combustion chamber to the fuel injector.
2. The valve as claimed in claim 1, further comprising a reed petal assembly having a plurality of reed petals, said reed petals adapted to close said plurality of exit orifices to prevent the back flow of combustion gases from the combustion chamber to the fuel injector.
3. The valve as claimed in claim 1, wherein each of said exit orifice is at an angle ranging from 30 to 90 degree relative to a longitudinal axis of said valve.
4. The valve as claimed in claim 1, wherein each of said exit orifice is at an angle of 45 degree relative to the longitudinal axis of said valve.
5. The valve as claimed in claim 1, wherein an outer portion of said valve having said exit orifices is configured substantially into the shape of a truncated cone.
6. The valve as claimed in claim 2, wherein said reed petal assembly is configured substantially into the shape of a truncated cone.
7. The valve as claimed in claim 1, wherein said plunger is a spherical ball.
8. The valve as claimed in claim 1, further comprising a cap adapted for holding said plunger.
9. The valve as claimed in claim 1, further comprising a lower portion adapted for housing said plunger and said cap.
10. The valve as claimed in claim 1, further comprising a cavity adapted for holding said magnet.
11. The valve as claimed in claim 1, wherein said magnet is a permanent magnet
12. The valve as claimed in claim 1, wherein said magnet is an electromagnet.
13. An engine comprising:
at least one fuel injector;
at least one injection port provided at the side of at least one cylinder of the engine; and
a valve adapted for protecting the fuel injector, the valve comprising, an inlet adapted for housing the fuel injector of the engine; an entry orifice adapted for receiving a fuel from the fuel injector, the entry orifice provided in fluid communication with the fuel injector; a plurality of exit orifices adapted for providing the fuel into a combustion chamber of the engine, the plurality of exit orifices provided in fluid communication with the entry orifice for receiving the fuel; a plunger adapted to close the entry orifice to prevent the back flow of a combustion gases from the combustion chamber to the fuel injector; a magnet adapted for lifting the plunger; and a plunger seat adapted for receiving the plunger, wherein the plunger unseats from the plunger seat to open the entry orifice on injection of fuel from the fuel injector and the fuel from the entry orifice exits through the plurality of exit orifices to the combustion chamber and the plunger rests in the plunger seat through the magnet in absence of fuel injection to close the entry orifice for preventing the back flow of the combustion gases from the combustion chamber to the fuel injector.
14. The engine as claimed in claim 13, further comprising a piston having an opening adapted to vent an air-fuel mixture trapped between the piston and the injection port to a crankcase of the engine.
15. The engine as claimed in claim 13, wherein the valve further comprises a reed petal assembly having a plurality of reed petals, the reed petals adapted to close the plurality of exit orifices to prevent the back flow of combustion gases from the combustion chamber to the fuel injector.
16. A valve for protecting a fuel injector of an engine, said valve comprising:
an inlet adapted for housing the fuel injector of the engine;
an entry orifice adapted for receiving a fuel from the fuel injector;
a plurality of exit orifices adapted for providing the fuel into a combustion chamber of the engine, wherein each of said exit orifices comprising a first portion and a second portion and said plurality of exit orifices provided in fluid communication with said entry orifice for receiving the fuel;
a plunger adapted to close said entry orifice to prevent the back flow of a combustion gases from the combustion chamber to the fuel injector;
a magnet adapted for lifting said plunger; and
a plunger seat adapted for receiving said plunger,
wherein
said first portion of each of said exit orifices is at a predetermined angle relative to a longitudinal axis of said valve and said second portion of each of said exit orifices is substantially parallel to the longitudinal axis of said valve and said second portion ends at a bottom end of said valve; and
said plunger unseats from said plunger seat to open said entry orifice on injection of fuel from the fuel injector and the fuel from said entry orifice exits through said plurality of exit orifices and said plunger rests in said plunger seat through said magnet in absence of fuel injection to close said entry orifice for preventing the back flow of the combustion gases from the combustion chamber to the fuel injector.
17. The valve as claimed in claim 16, wherein said first portion of each of said exit orifices is at an angle ranging from 30 to 90 degree relative to the longitudinal axis of said valve.
18. The valve as claimed in claim 16, wherein said first portion of each of said exit orifices is at an angle of 45 degree relative to the longitudinal axis of said valve.
19. The valve as claimed in claim 16, wherein said plunger is a spherical ball.
20. The valve as claimed in claim 16, further comprising a cap adapted for holding said plunger.
21. The valve as claimed in claim 16, further comprising a lower portion adapted for housing said plunger and said cap.
22. The valve as claimed in claim 16, further comprising a cavity adapted for holding said magnet.
23. The valve as claimed in claim 16, wherein said magnet is a permanent magnet
24. The valve as claimed in claim 16, wherein said magnet is an electromagnet.
25. An engine comprising:
at least one fuel injector;
at least one injection port provided at the side of at least one cylinder of the engine; and
a valve adapted for protecting the fuel injector, the valve comprising, an inlet adapted for housing the fuel injector of the engine; an entry orifice adapted for receiving a fuel from the fuel injector, the entry orifice provided in fluid communication with the fuel injector; a plurality of exit orifices adapted for providing the fuel into a combustion chamber of the engine, wherein each of said exit orifices comprising a first portion and a second portion and the plurality of exit orifices provided in fluid communication with the entry orifice for receiving the fuel; a plunger adapted to close the entry orifice to prevent the back flow of a combustion gases from the combustion chamber to the fuel injector; a magnet adapted for lifting the plunger; and a plunger seat adapted for receiving the plunger, wherein said first portion of each of said exit orifices is at a predetermined angle relative to a longitudinal axis of said valve and said second portion of each of said exit orifices is substantially parallel to the longitudinal axis of said valve and said second portion ends at a bottom end of said valve; and the plunger unseats from the plunger seat to open the entry orifice on injection of fuel from the fuel injector and the fuel from the entry orifice exits through the plurality of exit orifices to the combustion chamber and the plunger rests in the plunger seat through the magnet in absence of fuel injection to close the entry orifice for preventing the back flow of the combustion gases from the combustion chamber to the fuel injector.
26. The engine as claimed in claim 25, further comprising a piston having an opening adapted to vent an air-fuel mixture trapped between the piston and the injection port to a crankcase of the engine.

Date: February 24th, 2016 Signature:
Dr..Kalyan Chakravarthy

ABSTRACT
A valve for protecting a fuel injector of an engine includes an inlet, an entry orifice, a plurality of exit orifices, a magnet, a plunger, a plunger seat, a cap, a lower portion, a cavity and a reed petal assembly. The plunger unseats from the plunger seat to open the entry orifice on injection of fuel from the fuel injector and the fuel from the entry orifice exits through the plurality of exit orifices and the plunger rests in the plunger seat through the magnet in absence of fuel injection to close the entry orifice for preventing the back flow of the combustion gases from the combustion chamber to the fuel injector.
.

,CLAIMS:CLAIMS
We claim,
1. A valve for protecting a fuel injector of an engine, said valve comprising:
an inlet adapted for housing the fuel injector of the engine;
an entry orifice adapted for receiving a fuel from the fuel injector;
a plurality of exit orifices adapted for providing the fuel into a combustion chamber of the engine, said plurality of exit orifices provided in fluid communication with said entry orifice for receiving the fuel;
a plunger adapted to close said entry orifice to prevent the back flow of a combustion gases from the combustion chamber to the fuel injector;
a magnet adapted for lifting said plunger; and
a plunger seat adapted for receiving said plunger,
wherein
said plunger unseats from said plunger seat to open said entry orifice on injection of fuel from the fuel injector and the fuel from said entry orifice exits through said plurality of exit orifices and said plunger rests in said plunger seat through said magnet in absence of fuel injection to close said entry orifice for preventing the back flow of the combustion gases from the combustion chamber to the fuel injector.
2. The valve as claimed in claim 1, further comprising a reed petal assembly having a plurality of reed petals, said reed petals adapted to close said plurality of exit orifices to prevent the back flow of combustion gases from the combustion chamber to the fuel injector.
3. The valve as claimed in claim 1, wherein each of said exit orifice is at an angle ranging from 30 to 90 degree relative to a longitudinal axis of said valve.
4. The valve as claimed in claim 1, wherein each of said exit orifice is at an angle of 45 degree relative to the longitudinal axis of said valve.
5. The valve as claimed in claim 1, wherein an outer portion of said valve having said exit orifices is configured substantially into the shape of a truncated cone.
6. The valve as claimed in claim 2, wherein said reed petal assembly is configured substantially into the shape of a truncated cone.
7. The valve as claimed in claim 1, wherein said plunger is a spherical ball.
8. The valve as claimed in claim 1, further comprising a cap adapted for holding said plunger.
9. The valve as claimed in claim 1, further comprising a lower portion adapted for housing said plunger and said cap.
10. The valve as claimed in claim 1, further comprising a cavity adapted for holding said magnet.
11. The valve as claimed in claim 1, wherein said magnet is a permanent magnet
12. The valve as claimed in claim 1, wherein said magnet is an electromagnet.
13. An engine comprising:
at least one fuel injector;
at least one injection port provided at the side of at least one cylinder of the engine; and
a valve adapted for protecting the fuel injector, the valve comprising, an inlet adapted for housing the fuel injector of the engine; an entry orifice adapted for receiving a fuel from the fuel injector, the entry orifice provided in fluid communication with the fuel injector; a plurality of exit orifices adapted for providing the fuel into a combustion chamber of the engine, the plurality of exit orifices provided in fluid communication with the entry orifice for receiving the fuel; a plunger adapted to close the entry orifice to prevent the back flow of a combustion gases from the combustion chamber to the fuel injector; a magnet adapted for lifting the plunger; and a plunger seat adapted for receiving the plunger, wherein the plunger unseats from the plunger seat to open the entry orifice on injection of fuel from the fuel injector and the fuel from the entry orifice exits through the plurality of exit orifices to the combustion chamber and the plunger rests in the plunger seat through the magnet in absence of fuel injection to close the entry orifice for preventing the back flow of the combustion gases from the combustion chamber to the fuel injector.
14. The engine as claimed in claim 13, further comprising a piston having an opening adapted to vent an air-fuel mixture trapped between the piston and the injection port to a crankcase of the engine.
15. The engine as claimed in claim 13, wherein the valve further comprises a reed petal assembly having a plurality of reed petals, the reed petals adapted to close the plurality of exit orifices to prevent the back flow of combustion gases from the combustion chamber to the fuel injector.
16. A valve for protecting a fuel injector of an engine, said valve comprising:
an inlet adapted for housing the fuel injector of the engine;
an entry orifice adapted for receiving a fuel from the fuel injector;
a plurality of exit orifices adapted for providing the fuel into a combustion chamber of the engine, wherein each of said exit orifices comprising a first portion and a second portion and said plurality of exit orifices provided in fluid communication with said entry orifice for receiving the fuel;
a plunger adapted to close said entry orifice to prevent the back flow of a combustion gases from the combustion chamber to the fuel injector;
a magnet adapted for lifting said plunger; and
a plunger seat adapted for receiving said plunger,
wherein
said first portion of each of said exit orifices is at a predetermined angle relative to a longitudinal axis of said valve and said second portion of each of said exit orifices is substantially parallel to the longitudinal axis of said valve and said second portion ends at a bottom end of said valve; and
said plunger unseats from said plunger seat to open said entry orifice on injection of fuel from the fuel injector and the fuel from said entry orifice exits through said plurality of exit orifices and said plunger rests in said plunger seat through said magnet in absence of fuel injection to close said entry orifice for preventing the back flow of the combustion gases from the combustion chamber to the fuel injector.
17. The valve as claimed in claim 16, wherein said first portion of each of said exit orifices is at an angle ranging from 30 to 90 degree relative to the longitudinal axis of said valve.
18. The valve as claimed in claim 16, wherein said first portion of each of said exit orifices is at an angle of 45 degree relative to the longitudinal axis of said valve.
19. The valve as claimed in claim 16, wherein said plunger is a spherical ball.
20. The valve as claimed in claim 16, further comprising a cap adapted for holding said plunger.
21. The valve as claimed in claim 16, further comprising a lower portion adapted for housing said plunger and said cap.
22. The valve as claimed in claim 16, further comprising a cavity adapted for holding said magnet.
23. The valve as claimed in claim 16, wherein said magnet is a permanent magnet
24. The valve as claimed in claim 16, wherein said magnet is an electromagnet.
25. An engine comprising:
at least one fuel injector;
at least one injection port provided at the side of at least one cylinder of the engine; and
a valve adapted for protecting the fuel injector, the valve comprising, an inlet adapted for housing the fuel injector of the engine; an entry orifice adapted for receiving a fuel from the fuel injector, the entry orifice provided in fluid communication with the fuel injector; a plurality of exit orifices adapted for providing the fuel into a combustion chamber of the engine, wherein each of said exit orifices comprising a first portion and a second portion and the plurality of exit orifices provided in fluid communication with the entry orifice for receiving the fuel; a plunger adapted to close the entry orifice to prevent the back flow of a combustion gases from the combustion chamber to the fuel injector; a magnet adapted for lifting the plunger; and a plunger seat adapted for receiving the plunger, wherein said first portion of each of said exit orifices is at a predetermined angle relative to a longitudinal axis of said valve and said second portion of each of said exit orifices is substantially parallel to the longitudinal axis of said valve and said second portion ends at a bottom end of said valve; and the plunger unseats from the plunger seat to open the entry orifice on injection of fuel from the fuel injector and the fuel from the entry orifice exits through the plurality of exit orifices to the combustion chamber and the plunger rests in the plunger seat through the magnet in absence of fuel injection to close the entry orifice for preventing the back flow of the combustion gases from the combustion chamber to the fuel injector.
26. The engine as claimed in claim 25, further comprising a piston having an opening adapted to vent an air-fuel mixture trapped between the piston and the injection port to a crankcase of the engine.