Claims:We Claim
1. A fuel injector (10), said fuel injector 5 (10) comprising:
an injector housing (12);
an injector magnet head (14) secured to said injector housing (12), said injector
magnet head (14) adapted to regulate a flow of fuel from said injector housing
(12) to a combustion chamber of an engine, said injector magnet head (14)
10 further adapted to regulate a flow of fuel from said injector housing (12) to an
overflow supply path (16) via said injector magnet head (14); characterized in
that
at least one fin (18) secured to said injector magnet head (14), said at least one
fin (18) adapted to dissipate heat from the fuel in said fuel injector (10) to the
15 surroundings around said fuel injector (10).
2. The fuel injector (10) in accordance with Claim 1 wherein a first end portion
of said at least one fin (18) is secured to an injector magnet head sleeve (20) of
said injector magnet head (14), an opposite second end of said at least one fin
20 (18) secured to said injector magnet head (14), wherein heat from the fuel in
said fuel injector (10) flows from said injector magnet head sleeve (20) of said
injector magnet head (14) to the opposite second end of said at least one fin
(18) via a plurality of fin blades (21).
25 3. The fuel injector (10) in accordance with Claim 1 wherein a number of fin
blades (21) of said plurality of fin blades (21) that are secured to said at least
one fin (18) is user defined.
8
4. The fuel injector (10) in accordance with Claim 1 wherein a first end portion
of said at least one fin (18) is secured to an injector magnet head sleeve (20) of
said injector magnet head (14) by means of one of a circlip, a spring hinge
mechanism, and a screw and nut mechanical fastener. , Description:Complete Specification:

The following specification describes and ascertains the nature of this invention and the manner in which it is to be performed.
Field of the invention
[0001] This invention relates to a fuel injector, and more specifically to at least one fin adapted to dissipate heat from the fuel injector.

Background of the invention
[0002] US 2010078507 A describes a fuel injector having a fuel heater and an insulating air jacket. The fuel injector includes a fuel heater disposed on the outside of the injector body. The injector body conducts heat energy from the heater element to the fuel chamber preferably via cooling fins that protrude into the fuel path. The heater and injector body are disposed within a closed air jacket formed with the shell of the injector. As air has low thermal conductivity, this feature directs most of the heat energy radially inward through the wall of the injector body into the fuel. The injector is especially useful in injecting low-volatility fuels into internal combustion engines under low-temperature conditions.

Brief description of the accompanying drawing
[0003] Figure 1 illustrates a fuel injector, and more specifically to at least one fin that is adapted to dissipate heat from the fuel injector.

Detailed description of the embodiments
[0004] Figure 1 illustrates a fuel injector 10. The fuel injector 10 comprises an injector housing 12, and an injector magnet head 14 secured to the injector housing 12. The injector magnet head 14 is adapted to regulate a flow of fuel from the injector housing 12 to a combustion chamber of an engine. The injector magnet head 14 is further adapted to regulate a flow of fuel from the injector housing 12 to an overflow supply path 16 via the injector magnet head 14. At least one fin 18 is secured to the injector magnet head 14, wherein the at least one fin 18 is adapted to dissipate heat from the fuel in the fuel injector 10 to the surroundings around the fuel injector 10.
[0005] Figure 1 illustrates a fuel injector 10. The fuel injector 10 comprises an injector housing 12 that is adapted to store an injector needle 22 and an injector magnet head 14. More specifically, in the exemplary embodiment, the injector magnet head 14 is adapted to control a lift of the injector needle 22 to facilitate discharging a controlled quantity of fuel from the fuel injector 10 to a combustion chamber of an engine. Moreover, the injector magnet head 14 is secured to the injector housing 12, and is adapted to regulate a flow of fuel from the injector housing 12 to the combustion chamber of the engine. In the exemplary embodiment, the injector magnet head 14 is adapted to regulate a flow of fuel from the injector housing 12 to an overflow supply path 16 via the injector magnet head 14. As the fuel from the injector housing 12 flows through the overflow supply path 16, the hot fuel that is channeled into the injector housing 12 heats up the injector magnet head 14. More specifically, the circulation of the fuel around the various portions of the injector housing 12 of the injector magnet head 14 causes the injector magnet head 14 to get heated up due to the transfer of heat from the fuel to the injector magnet head 14. As the fuel continues to circulate around the injector magnet head 14, the continuous heating up of the injector magnet head 14 causes the plastic material inside the injector magnet head 14 to degrade. Therefore, it is critical to withdraw the heat away from the injector magnet head 14 of the fuel injector 10 in order to maintain the structural integrity of the injector magnet head 14. In view of the above described problem, at least one fin 18 is secured to the injector magnet head 14 for withdrawing the heat away from the injector magnet head 14 of the fuel injector 10.

[0006] In an exemplary embodiment, at least one fin 18 is secured to the injector magnet head 14. The at least one fin 18 is adapted to dissipate heat from the fuel in the fuel injector 10 to the surroundings around the fuel injector 10. More specifically, a first end portion of the at least one fin 18 is secured to an injector magnet head sleeve 20 of the injector magnet head 14. The injector magnet head sleeve 20 forms an integral portion of the injector magnet head 14 and absorbs the heat from the fuel that is circulating through the injector magnet head 14. Therein, the heat that is absorbed by the injector magnet head sleeve 20 from the injector magnet head 14 is dissipated via the first end portion of the at least one fin 18 that is secured to the injector magnet head sleeve 20. While the first end portion of the at least one fin 18 is secured to the injector magnet head sleeve 20, the complete length of the at least one fin 18 is secured to the injector magnet head 14. In an alternate exemplary embodiment, only the second end portion of the at least one fin 18 is secured to the injector magnet head 14. A plurality of fin blades 21 are secured to the at least one fin 18 and conducts the heat away from the first end portion of the at least one fin 18. Therefore, the heat that is channeled to the at least one fin 18 from the injector magnet head sleeve 20 of the injector magnet head 14 flows to the opposite second end of the at least one fin 18 via the plurality of fin blades 21. More specifically, as the heat is channeled from the first end portion of the at least one fin 18 that is secured to the injector magnet head sleeve 20 to the opposite second end of the at least one fin 18, the heat that flows through the at least one fin 18 is dissipated to the atmosphere via the plurality of fin blades 21.

[0007] In the exemplary embodiment, a number of fin blades of the plurality of fin blades 21 that are secured to the at least one fin 18 is user defined. More specifically, depending on the size of the injector magnet head 14 and the capacity of the fuel injector 10, the number of fin blades 21 that is required for the optimum transfer of heat from the fuel injector 10 to the atmosphere via the at least one fin 18 is user defined. If the number of fin blades 21 is lower than the optimum number of fin blades 21 required for heat dissipation from the fuel injector 10, then heat dissipation will not be effective. Under the circumstances, the heat will continue to build up within the injector magnet head 14, thereby causing the injector magnet head 14 to degrade. If the number of fin blades 21 is greater than the optimum number of fin blades 21 required for heat dissipation from the fuel injector 10, then the cost associated with increasing the number of fin blades 21 that are fastened onto the at least one fin 18 increases in proportion to the number of fin blades 21 that are fastened onto the at least one fin 18.

[0008] In an exemplary embodiment, a first end portion of the at least one fin 18 is secured to the injector magnet head sleeve 20 of the injector magnet head 14 by means of one of a circlip, a spring hinge mechanism, and a screw and nut mechanical fastener. In an alternate exemplary embodiment, any other means that is known in the art is used to fasten the first end portion of the at least one fin 18 to the injector magnet head sleeve 20.

[0009] A working of the at least one fin 18 that is secured to the fuel injector 10 is described as an example. As fuel flows through the fuel injector 10, the fuel is allowed to circulate around the injector magnet head 14 of the fuel injector 10. As the injector magnet head 14 get heated up, the heat from the injector magnet head 14 gets transmitted to the injector magnet head sleeve 18. From the injector magnet head sleeve 18, the heat is transmitted from the first end of the at least one fin 18 to the opposite end of the at least one fin 18. While the heat is being transmitted from the first end of the at least one fin 18 to the opposite second end of the at least one fin 18, heat is dissipated from the at least one fin 18 via the plurality of fin blades 21 that are secured to the at least one fin 18. As heat is continuously dissipated from the plurality of fin blades 21 to the atmosphere, the heat is continuously propagated from the injector magnet head sleeve 20 to the opposite second end of the at least one fin 18 via the plurality of fin blades 21. Therefore, the heat that is supplied from the injector magnet head 14 via the injector magnet head sleeve 18 gets continuously dissipated via the plurality of fin blades 21 when the heat flows from the first end of the at least one fin 18 to the opposite second end of the at least one fin 18.

[0010] It must be understood that the embodiments explained above are only illustrative and do not limit the scope of the disclosure. Many modifications in the embodiments with regard to dimensions of various components are envisaged and form a part of this invention. The scope of the invention is only limited by the scope of the claims.