FORM-2
THE PATENTS ACT, 1970
(39 of 1970)
&
THE PATENTS RULES, 2006
COMPLETE
Specification
(See Section 10 and Rule 13) VORTEX COOLING SYSTEM FOR VISCOUS DAMPERS
KIRLOSKAR OIL ENGINES LIMITED
an Indian Company,
of Kirloskar Oil Engines Limited, Laxmanrao Kirloskar Road,
Khadki,Pune 411003,
Maharashtra, India.
Inventors: Vaze Abhijeet
THE FOLLOWING SPECIFICATION PARTICULARLY DESCRIBES THE INVENTION AND THE MANNER IN WHICH IT IS TO BE PERFORMED

FIELD OF THE DISCLOSURE
The present disclosure relates to cooling vibration dampers.
Particularly, the present disclosure relates to the field of vortex cooling of viscous vibration dampers in internal combustion engine.
BACKGROUND
Viscous dampers are used widely in the internal combustion engines for absorbing impact of torsional vibrations caused during combustion of fuel. In the process of absorbing torsional vibration, heat is generated in viscous dampers which tend to reduce its operational life. Hence, viscous dampers are required to be maintained at an optimum temperature by dissipation of the heat resulting from absorption of torsional vibration. This helps in increasing the effective operational life of the dampers.
Conventionally, viscous dampers are cooled using either cooling fan or engine lubricating oil. Accordingly, in Vee engine, the dampers, located on pulley end of the engine, are cooled by pusher type cooling fan. However, the problem of heat generation is elevated due to air stagnation. The engine being at a high temperature, the stagnant air flows over the engine which acts as a bluff body, thus, preventing the air flow to be diverted onto the damper. This results in inefficient cooling of the damper surface and hence reduces the life of the dampers.
Again, viscous spring type torsional vibration dampers are also cooled using engine lubricating oil. Hence, the lubricating system of the engine has to be efficient in order to provide effective cooling of the damper while

lubricating and cooling the engine. Further, as the operational life of lubricating oil is inversely proportional to damper temperature, efficient lubricating oil cooling system is required to be provided. This results in an increase in the overall cost of the engine.
Thus, there is felt a need to overcome the drawbacks of conventional damper cooling systems employed to cool viscous dampers.
OBJECTS
Some of the objects of the present disclosure aimed to ameliorate one or more problems of the prior art or to at least provide a useful alternative are described herein below:
An object of the present disclosure is to provide a damper cooling system for effective cooling of the damper surface.
Still another object of the present disclosure is to provide a damper cooling system which enables in increasing the effective operational life of dampers.
Yet another object of the present disclosure is to provide a damper cooling system which reduces the cost involved in cooling the damper surface.
Further another object of the present disclosure is to provide a damper cooling system which requires less maintenance.
Other objects and advantages of the present disclosure will be more apparent from the following description when read in conjunction with the accompanying figures, which are not intended to limit the scope of the present disclosure.

SUMMARY
In accordance with the present invention there is provided a vortex cooling system for dissipating heat, resulting from damping of vibration in an internal combustion engine, from the surface of viscous dampers by reducing temperature of the surface of the viscous dampers, the system comprising:
a fluid pressurizing unit adapted to pressurize a predetermined quantity of an intake fluid from a low pressure to produce a high pressure fluid having a predetermined high temperature and pressure;
at least one vortex tube adapted to receive the high pressure fluid, the vortex tube having a swirl chamber adapted to accelerate the high pressure fluid at a predetermined high velocity and an intermediate low temperature; and
at least one diffuser adapted to cooperate with the vortex tube for diffusing the high pressure fluid at the predetermined high velocity and a predetermined low temperature from the vortex tube onto the surface of the viscous dampers.
Typically, the high pressure fluid is cooled by natural convection or by forced convention.
Alternatively, a charge air cooler is fluidly connected between the fluid pressurizing unit and the vortex tube, the charge air cooler being adapted to reduce the temperature of the high pressure fluid to a low temperature for producing high pressure cooling fluid.

Typically, the charge air cooler is selected from the group consisting of inter-cooler and after-cooler.
Typically, the charge air cooler is adapted to reduce the temperature of the high pressure fluid by a method selected from the group consisting of air cooling and water cooling.
Typically, the fluid pressurizing unit is selected from the group consisting of turbocharger and supercharger.
Typically, the intake fluid is selected from the group consisting of exhaust gas and atmospheric air.
Preferably, the diffuser is adapted to cooperate with the vortex tube through an insulated pipe.
Preferably, the diffuser is positioned in close proximity to the vortex tube.
Typically, the system is operated by an electronic controller adapted to compute a corresponding low temperature of the high pressure cooling fluid based on a temperature signal received from a temperature sensor, the temperature sensor being adapted to sense the temperature of the damper.
BRIEF DESCRIPTION OF ACCOMPANYING DRAWING
The vortex cooling system for viscous dampers of the present disclosure will now be described with the help of accompanying drawing, in which:
Figure 1 illustrates a schematic representation of the vortex cooling system for viscous dampers in accordance to the present disclosure.

DETAILED DESCRIPTION OF THE ACCOMPANYING DRAWING
Conventional cooling systems for reducing the surface temperature of viscous dampers are achieved by the use of either cooling fan or engine lubricating oil. However, conventional cooling systems employed for cooling viscous dampers are plagued by several drawbacks. One of the drawbacks of conventional cooling systems is that they results in inefficient cooling of the damper surface resulting in reduction in the life of the dampers. Further, a drawback of conventional cooling systems using engine lubricating oil for cooling damper is that an efficient lubricating oil cooling system is required which results in an increase in the overall cost of the engine.
The applicant has recognized that conventional cooling systems for viscous dampers do not provide effective cooling and are also not cost effective. Therefore, in accordance with the present disclosure, a vortex cooling system for viscous dampers is envisaged that overcomes the drawbacks of conventional cooling systems and provides the following features:
• effective dampening of vibrations;
• effective cooling of the damper surface;
• increase in effective operational life of dampers;
• reduced cost involved in cooling the damper surface; and
• reduced maintenance.
A preferred embodiment of the vortex cooling system for viscous dampers of the present disclosure will now be described in detail with reference to the accompanying drawings. The preferred embodiment does not limit the scope

and ambit of the disclosure. The description provided is purely by way of example and illustration.
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.
The following 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.

Referring to the accompanied drawings, a vortex cooling system for viscous damper, referenced generally by the numeral 10 in accordance with this disclosure will be explained with reference to Figure 1, wherein the components have been generally referenced by numerals as indicated in the accompanying drawing.
Engine (12), typically an internal combustion engine, generates tremendous torsional vibration in an engine crankshaft during power impulses/strokes. Viscous damper (14) enables absorption of the torsional vibrations so as the prevent damage to the engine crankshaft. In the process of absorbing the torsional vibration, the temperature of viscous damper (14) increases.
Engine (12) receives a high pressure fluid from fluid pressurizing unit (16) which is typically a turbocharger or supercharger. Fluid pressurizing unit (16) is provided with an intake manifold for allowing inlet of intake fluid, typically atmospheric air or exhaust gas, at a low pressure into fluid pressurizing unit (16). The temperature of the intake fluid is increased from low pressure to a predetermined high pressure and a predetermined high temperature resulting in the high pressure fluid. A part of the high pressure fluid is supplied to engine (12) and another part of the high pressure fluid is supplied to charge air cooler (18).
Charge air cooler (18) enables in reducing the temperature of the high pressure fluid, received from fluid pressurizing unit (16), for producing a high pressure cooling fluid. Typically, charge air cooler (18) is an inter-cooler or an after-cooler. The method of reducing the temperature of the high pressure heated fluid to produce the high pressure cooling fluid in

charge air cooler (18) is accomplished either by air cooling or water cooling of the high pressure heated fluid entering charge air cooler (18). Alternatively, the high pressure fluid from fluid pressurizing unit (16) is supplied to vortex tube (20).
Vortex cooling system (10) utilizes at least one vortex tube (20). The high pressure cooling fluid discharged from charge air cooler (18) or the high pressure fluid from fluid pressurizing unit (16), is tangentially injected into a swirl chamber (not shown in figure) located within vortex tube (20). The swirl chamber (not shown in figure) enables in accelerating the high pressure cooling fluid or the high pressure fluid to a high speed of rotation resulting in a predetermined high velocity of the high pressure cooling fluid or the high pressure fluid at an intermediate low temperature.
Diffuser (22) cooperates with vortex tube (20) via an insulated pipe (not shown in figure) such that diffuser (22) is located in close proximity to vortex tube (20). Diffuser (22) helps in diffusing the high pressure cooling fluid or the high pressure fluid at the predetermined high velocity and a predetermined low temperature onto the surface of viscous damper (14) so as to reduce the temperature of viscous damper (14) resulting from absorption of the torsional vibration of the engine crankshaft. A temperature sensor (not shown in figure) is provided to sense the temperature of viscous damper (14) and generate a damper temperature signal.
An electronic controller (not shown in figure) enables in computing a corresponding predetermined low temperature of the high pressure cooling fluid or the high pressure fluid to be diffused on the surface of the damper

(14) based on the damper temperature signal received from the temperature sensor (not shown in figure).
TECHNICAL ADVANCEMENTS
The technical advancements offered by the present disclosure include the realization of:
• effective dampening of vibrations;
• effective cooling of the damper surface;
• increasing the effective operational life of dampers;
• reducing cost involved in cooling the damper surface; and
• reducing maintenance cost and frictional dissipation due to minimal wear and tear.
• Eliminating use of special coolant for cooling dampers;
Throughout this specification the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element, integer or step, or group of elements, integers or steps, but not the exclusion of any other element, integer or step, or group of elements, integers or steps.
The use of the expression "at least" or "at least one" suggests the use of one or more elements or ingredients or quantities, as the use may be in the embodiment of the disclosure to achieve one or more of the desired objects or results.
The numerical values given of various physical parameters, dimensions and quantities are only approximate values and it is envisaged that the values higher

or lower than the numerical value assigned to the physical parameters, dimensions and quantities fall within the scope of the disclosure unless there is a statement in the specification to the contrary.
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.

We claim:
1. A vortex cooling system for dissipating heat, resulting from damping of
vibration in an internal combustion engine, from the surface of viscous
dampers by reducing temperature of the surface of the viscous dampers,
said system comprising:
a fluid pressurizing unit adapted to pressurize a predetermined quantity of an intake fluid from a low pressure to produce a high pressure fluid having a predetermined high temperature and pressure;
at least one vortex tube adapted to receive said high pressure fluid, said vortex tube having a swirl chamber adapted to accelerate said high pressure fluid at a predetermined high velocity and an intermediate low temperature; and
at least one diffuser adapted to cooperate with said vortex tube for diffusing said high pressure fluid at said predetermined high velocity and a predetermined low temperature from said vortex tube onto the surface of the viscous dampers.
2. The vortex cooling system as claimed in claim 1, wherein said high
pressure fluid is cooled by natural convection or by forced convention.

3. The vortex cooling system as claimed in claim 1, further comprising a charge air cooler fluidly connected between said fluid pressurizing unit and said vortex tube, said charge air cooler being adapted to reduce the temperature of said high pressure fluid to a low temperature for producing high pressure cooling fluid.
4. The vortex cooling system as claimed in claim 3, wherein said charge air cooler is selected from the group consisting of inter-cooler and after-cooler.
5. The vortex cooling system as claimed in claim 3, wherein said charge air cooler is adapted to reduce the temperature of said high pressure fluid by a method selected from the group consisting of air cooling and water cooling.
6. The vortex cooling system as claimed in claim 1, wherein said fluid pressurizing unit is selected froni the group consisting of turbocharger and supercharger.
7. The vortex cooling system as claimed in claim 1, wherein said intake fluid is selected from the group consisting of exhaust gas and atmospheric air.
8. The vortex cooling system as claimed in claim 1, wherein said diffuser is adapted to cooperate with said vortex tube through an insulated pipe.
9. The vortex cooling system as claimed in claim 1, wherein said diffuser is positioned in close proximity to said vortex tube.
lO.The vortex cooling system as claimed in claim 1, wherein said system is operated by an electronic controller adapted to compute a corresponding low temperature of said high pressure cooling fluid based on a

temperature signal received from a temperature sensor, said temperature sensor being adapted to sense the temperature of said damper.