FORM-2
THE PATENT ACT,1970
(39 OF 1970)
AND
THE PATENT RULES, 2003
(As Amended)
COMPLETE SPECIFICATION (See section 10;rule 13)
"DOUBLE PEAKS IN FLUID RESONANCE"
Sujan Contitech AVS Pvt. Ltd., a corporation organized and existing under the laws of India, of F-11, Phase 3, MIDC Chakan, Taluka Khed, Pune –410 501, Maharashtra, India.
The following specification particularly describes the invention and the manner in which it is to be performed:

DOUBLE PEAKS IN FLUID RESONANCE
FIELD OF INVENTION
Embodiments of the present application illustrates a harshness reducing device, more specifically, to a device to manage double peaks in fluid resonance.
BACKGROUND OF THE INVENTION
Background description includes information that may be useful in understanding the present invention. It is not an admission that any of the information provided herein is prior art or relevant to the presently disclosed invention, or that any publication specifically or implicitly referenced is prior art.
Hydraulic engine mounts are designed to dampen and absorb engine vibrations before they reach the chassis. The primary use of such hydraulic engine mounts is in engines that produce plenty of high and low-frequency vibrations and are preferred in vehicles or industries that require noise and vibration to be at a minimum level. Therefore, it is necessary to isolate multiple frequencies; however, usually only one frequency isolation is available with conventional hydro mount technology. Conventional hydro mounts lack the technology to selectively switch off the orifice passages in order to isolate multiple frequencies, due to the problem of increased construction and material costs. Additionally, conventional techniques for generating double peaks in fluid resonance have the problem of reducing damping to improve harshness.
Therefore, there is a need for a technology that reduces damping drop and suppresses cavitation to improve harshness regarding technology for generating double peaks in fluid resonance.
SUMMARY OF THE INVENTION
The following presents a simplified summary of the subject matter in order to provide a basic understanding of some of the aspects of subject matter embodiments. This summary is not an extensive overview of the subject matter. It is not intended to identify key/critical elements of the embodiments or to delineate the scope of the subject matter. Its sole purpose to present some concepts of the subject matter in a simplified form as a prelude to the more detailed description that is presented later.

Disclosed here is a device that addresses the above-mentioned need for a technology that reduces the damping drop and suppresses cavitation for the purpose of improving harshness with respect to technology for generating double peaks in fluid resonance. The device is therefore, used to reduce harshness due to vibrations of a vehicle, which comprises a decoupler, at least two orifices, and at least two orifice paths. The decoupler is positioned within main body of the device, and the two orifices include a first orifice positioned within the main body and adjacent to the decoupler and a second orifice that is positioned in outer periphery of the main body. The two orifice paths comprise a first hole extending from the decoupler and a second hole that is provided on the main body. The second hole is in fluid communication with a first orifice to receive and transfer a fluid. When amplitude of the vibrations of the vehicle increases, a thick portion of a bottom section of the decoupler interferes with the main body, which blocks flow of a liquid to the first hole, and the liquid flows to the second orifice to generate fluid resonance.
In an embodiment, the device further comprises seal ribs positioned at the bottom section of the thick portion of the decoupler, where the seal ribs interfere and block the flow of liquid to the first hole, allowing the liquid to flow to the second orifice causing the generation of the fluid resonance that reduces the harshness in the vibrations of the vehicle. In an embodiment, the first hole that is positioned in the thick portion of the decoupler comprises a tapered structure with a predefined diameter on a main chamber side, wherein the tapered structure adjusts cavitation and damping between the main chamber side and a passive chamber positioned below the main chamber side, due to the vibrations of the vehicle. In an embodiment, tapered structure of the first hole comprises a smaller diameter on the main chamber side, which reduces cavitation by increasing the amount of liquid flowing into the main chamber side. In an embodiment, tapered structure of the first hole comprises a larger diameter on the main chamber side, which increases flow rate of the liquid from the main chamber side and increases damping.
In an embodiment, the device further comprises a first gap, a second gap, and a sealing height. The first gap is positioned between a bottom of the decoupler and the main body, the second gap is positioned between sides of the decoupler and the main body, and the sealing height is positioned between the decoupler and main body of the device. The liquid flows through the first hole, the second hole, and the sealing height to create the fluid resonance. The positioning of the first gap, the second gap, and the sealing height provides for adjustment of level of the

fluid resonance, resonance frequency of the fluid resonance, and cavitation level associated with the fluid resonance.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
The following drawings are illustrative of particular examples for enabling systems and methods of the present disclosure, are descriptive of some of the methods and mechanism, and are not intended to limit the scope of the invention. The drawings are not to scale (unless so stated) and are intended for use in conjunction with the explanations in the following detailed description.
FIGURE 1A exemplarily illustrates positioning of the device to reduce harshness in an engine, as an example embodiment of the present invention.
FIGURE 1B exemplarily illustrates a partial cutaway view showing the positioning of the device to reduce harshness in an engine, as an example embodiment of the present invention.
FIGURE 2A exemplarily illustrates a sectional view of the device, as an example embodiment of the present invention.
FIGURES 2B and 2C exemplarily illustrates a sectional view of embodiments of the device, as example embodiments of the present invention.
FIGURES 3A and 3B exemplarily illustrate graphical representation of results during operation of the device at high amplitude and low amplitude respectively, as example embodiments of the present invention.
Persons skilled in the art will appreciate that elements in the figures are illustrated for simplicity and clarity and may represent both hardware and software components of the system. Further, the dimensions of some of the elements in the figure may be exaggerated relative to other elements to help to improve understanding of various exemplary embodiments of the present disclosure. Throughout the drawings, it should be noted that like reference numbers are used to depict the same or similar elements, features, and structures.

DETAILED DESCRIPTION OF THE INVENTION
Exemplary embodiments now will be described. The disclosure may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey its scope to those skilled in the art. The terminology used in the detailed description of the particular exemplary embodiments illustrated in the accompanying drawings is not intended to be limiting. In the drawings, like numbers refer to like elements.
It is to be noted, however, that the reference numerals used herein illustrate only typical embodiments of the present subject matter, and are therefore, not to be considered for limiting of its scope, for the subject matter may admit to other equally effective embodiments.
The specification may refer to “an”, “one” or “some” embodiment(s) in several locations. This does not necessarily imply that each such reference is to the same embodiment(s), or that the feature only applies to a single embodiment. Single features of different embodiments may also be combined to provide other embodiments.
As used herein, the singular forms “a”, “an” and “the” are intended to include the plural forms as well, unless expressly stated otherwise. It will be further understood that the terms “includes”, “comprises”, “including” and/or “comprising” when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being “connected” or “coupled” to another element, it can be directly connected or coupled to the other element or intervening elements may be present. Furthermore, “connected” or “coupled” as used herein may include operatively connected or coupled. As used herein, the term “and/or” includes any and all combinations and arrangements of one or more of the associated listed items.
Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this

disclosure pertains. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
Referring to FIGURES 1-2A, FIGURE 1A exemplarily illustrates positioning of the device (100) to reduce harshness in an engine, FIGURE 1B exemplarily illustrates a partial cutaway view showing the positioning of the device (100) to reduce harshness in an engine, FIGURE 2A exemplarily illustrates a sectional view of the device (100), as an example embodiment of the present invention. The device (100) to reduce harshness due to vibrations of a vehicle comprises a decoupler (102), at least two orifices (106a and 106b), and at least two orifice paths (108a and 108b). The decoupler (102) is positioned within main body (104) of the device (100) and the two orifices (106a and 106b) comprising a first orifice (106a) positioned within the main body (104) and adjacent to the decoupler (102), and a second orifice (106b) that is positioned in outer periphery of the main body (104). The two orifice paths (108a and 108b) comprise a first hole (108a) extending from the decoupler (102) and a second hole (108b) that is provided on the main body (104). The two orifice paths (108a and 108b) are set in the device (100) part and comprise two different fluid resonances.
As further described in FIGURE 2A, the second hole (108b) is in fluid communication with a first orifice (106a) to receive and transfer a fluid. When amplitude of the vibrations of the vehicle increases, a thick portion (110) of a bottom section of the decoupler (102) interferes with the main body (104), which blocks flow of a liquid to the first hole (108a), and the liquid flows to the second orifice (106b) to generate fluid resonance. In other words, when the amplitude becomes large, the bottom of the thick part (110) of the decoupler (102) interferes with the device (100), blocking the flow of liquid to first hole (108a), and the liquid flows to second orifice (106b), generating fluid resonance (device structure).
Referring to FIGURE 2A, the device 100 further comprises seal ribs (112) positioned at the bottom section of the thick portion (110) of the decoupler (102), where the seal ribs (112) interfere and block the flow of liquid to the first hole (108a), allowing the liquid to flow to the second orifice (106b) causing the generation of the fluid resonance that reduces the harshness in the vibrations of the vehicle. As described herein, the structure with the seal ribs (112) is positioned at the bottom of the thick part (110) of the decoupler (102). The sealing ribs (112)

improve the effect of blocking the flow of liquid to first hole (108a), increasing the amount of liquid flowing to second orifice (106b) and increases damping.
The device (100) further comprises a first gap (116a), a second gap (116b), and a sealing height (118). The first gap (116a) is positioned between a bottom of the decoupler (102) and the main body (104), the second gap (116b) is positioned between sides of the decoupler (102) and the main body (104), and the sealing height (118) is positioned between the decoupler (102) and main body (104) of the device (100). The liquid flows through the first hole (108a), the second hole (108b), and the sealing height (118) to create the fluid resonance. The positioning of the first gap (116a), the second gap (116b) and the sealing height (118) provides for adjustment of level of the fluid resonance, resonance frequency of the fluid resonance, and cavitation level associated with the fluid resonance.
As described herein, the structure in which an orifice of first hole (108a), is provided in the decoupler (102), a fourth hole (108d) is provided in the device (100) along with the first gap (116a), the second gap (116b), and the sealing height (118) that are provided between the decoupler (102) and the device (100). 1) When the amplitude is small, the liquid flows through sealing height (118) and the first hole (108a) and fluid resonance occurs (liquid flows to orifice 1 and fluid resonance occurs). 2) Resonance level, resonance frequency, and cavitation level can be adjusted by modifying the first gap (116a), the second gap (116b), the sealing height (118), the first hole (108a), the second hole (108b), the third hold (108c), and fourth hole (108d).
FIGURES 2B and 2C exemplarily illustrate a sectional view of embodiments of the device (100), as example embodiments of the present invention. During operation, the cavitation happens between the main chamber side (202) and the passive chamber (204). The diameter of the tapered structure (114) of the decoupler (102) eliminates the cavitation by transferring liquid to the main chamber side (202) when there is negative pressure generation between the main chamber side (202) and the passive chamber (204). As shown in FIGURES 2B and 2C, the first hole (108a) positioned in the thick portion (110) of the decoupler (102) comprises a tapered structure (114) with a predefined diameter on a main chamber side (202), where the tapered structure (114) adjusts cavitation and damping between the main chamber side (202) and a passive chamber (204) positioned below the main chamber side (202), due to the vibrations of the vehicle. As disclosed in FIGURE 2B, the tapered structure (114) of the first

hole (108a) comprises a smaller diameter (114a) on the main chamber side (202), which reduces cavitation by increasing the amount of liquid flowing into the main chamber side (202).
As described herein, the first hole (108a) provided in the thick part (110) of the decoupler (102) has a tapered structure (114) with a smaller diameter on the main chamber side (202). Here, cavitation is reduced by increasing the amount of liquid flowing into the main chamber side (202). As disclosed in FIGURE 2C, the tapered structure of the first hole (108a) comprises a larger diameter (114b) on the main chamber side (202), which increases flow rate of the liquid from the main chamber side (202) to the passive chamber (204) and increases damping. As described herein, the first hole (108a) provided in the thick part (110) of the decoupler (102) has a tapered structure with a larger diameter on the main chamber side (202). Here, the flow rate of liquid from the main chamber side (202) increases and flows towards the passive chamber (204), and thereafter the damping increases.
The device (100) disclosed herein, in short, includes the following features:
1) Generate two different frequency resonance with two orifice liquid flow.
2) Construction of two orifice paths (108a and 108b) to attain the two different frequency resonances.
3) The first gap (116a), the second gap (116b), and the sealing height (118), along with first hole (108a), the second hole (108b), the third hold (108c), and fourth hole (108d), are parameters for adjusting damping.
4) When the amplitude is small, fluid flows through sealing height (118), and first hole (108a), causing fluid resonance. (Liquid flows to orifice 1 and fluid resonance occurs).
5) When the amplitude increases, the seal ribs (112) provided at the bottom of the thick part (110) of the decoupler (102) interfere and block the flow of liquid to first hole (108a), and the liquid flows to second orifice (106b), causing fluid resonance.
6) Type 1, Type 2, and Type 3 decouplers (102) reduce the negative pressure level in the main chamber which countermeasure for cavitation noise.
7) Type 2 decouplers (102) reduce cavitation by increasing the amount of liquid flowing into the main chamber.
8) Type 3 decoupler (102) increases the amount of liquid flowing out of the main chamber and increases damping.

Accordingly, FIGURES 3A and 3B exemplarily illustrate graphical representation of results during operation of the device (100) at high amplitude and low amplitude respectively, as example embodiments of the present invention.
Current invention has been discussed specifically with full disclosure. However, numerous changes can be made in the detail of structures, combinations, and part arrangement along with technical advancements that will be implemented in near future without changing the spirit and scope of the invention.
Although the invention has been described with reference to specific embodiments, this description is not meant to be construed in a limiting sense. Various modifications of the disclosed embodiments, as well as alternate embodiments of the invention, will become apparent to persons skilled in the art upon reference to the description of the invention. It is therefore, contemplated that such modifications can be made without departing from the scope of the present invention as defined.

We Claim:
1. A device (100) to reduce harshness due to vibrations of a vehicle, comprising:
a decoupler (102) that is positioned within main body (104) of the device (100);
at least two orifices (106a and 106b) comprising a first orifice (106a) positioned within the main body (104) and adjacent to the decoupler (102), and a second orifice (106b) that is positioned in outer periphery of the main body (104);
at least two orifice paths (108a and 108b), wherein structure of the two orifice paths (108a and 108b) comprise a first hole (108a) extending from the decoupler (102), a second hole (108b) that is provided on the main body (104) assembly, wherein the second hole (108b) is in fluid communication with a first orifice (106a) to receive and transfer a fluid,
wherein when amplitude of the vibrations of the vehicle increases, a thick portion (110) of a bottom section of the decoupler (102) interferes with the main body (104), which blocks flow of a liquid to the first hole (108a), and the liquid flows to the second orifice (106b) to generate fluid resonance.
2. The device (100) as claimed in claim 1, further comprises seal ribs (112) positioned at the bottom section of the thick portion (110) of the decoupler (102), wherein the seal ribs (112) interfere and block the flow of liquid to the first hole (108a), allowing the liquid to flow to the second orifice (106b) causing the generation of the fluid resonance that reduces the harshness in the vibrations of the vehicle.
3. The device (100) as claimed in claim 1, wherein the first hole (108a) positioned in the thick portion (110) of the decoupler (102) comprises a tapered structure (114) with a predefined diameter on a main chamber side (202), wherein the tapered structure (114) adjusts cavitation and damping between the main chamber side (202) and a passive chamber (204) positioned below the main chamber side (202), due to the vibrations of the vehicle.
4. The device (100) as claimed in claim 3, wherein tapered structure (114) of the first hole (108a) comprise a smaller diameter (114a) on the main chamber side (202), which reduces cavitation by increasing the amount of liquid flowing into the main chamber side (202).

5. The device (100) as claimed in claim 3, wherein tapered structure (114) of the first hole (108a) comprises a larger diameter (114b) on the main chamber side (202), which increases flow rate of the liquid from the main chamber side (202) to the passive chamber (204) and increases damping.
6. The device (100) as claimed in claim 1, further comprises:
a first gap (116a) positioned between a bottom of the decoupler (102) and the main body (104),
a second gap (116b) positioned between sides of the decoupler (102) and the main body (104), and
a sealing height (118) is positioned between the decoupler (102) and main body (104) of the device (100),
wherein the liquid flows through the first hole (108a), the second hole (108b), and the sealing height (118) to create the fluid resonance, and wherein the positioning of the first gap (116a), the second gap (116b) and the sealing height (118) provides for adjustment of level of the fluid resonance, resonance frequency of the fluid resonance, and cavitation level associated with the fluid resonance.