FORM-2
THE PATENT ACT,1970
(39 OF 1970)
AND
THE PATENT RULES, 2003
(As Amended)
COMPLETE SPECIFICATION (See section 10;rule 13)
"HYDRO MOUNT CAVITATION SUPPRESSION TECHNOLOGY"
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:

HYDRO MOUNT CAVITATION SUPPRESSION TECHNOLOGY
TECHNICAL FIELD
The present invention relates to engine mounts that are used to reduce vibration in engines, more specifically to an engine mount that is used to suppress cavitation effect of the working fluid, which is due to the decrease in local static pressure.
BACKGROUND
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 claimed invention, or that any publication specifically or implicitly referenced is prior art.
Noise, Vibration and Harshness (or NVH) is generally a measure of how much unpleasant auditory and perceptible feedback the car delivers as a user drives. In Passenger Vehicles, to attain the best NVH performance, we need to overcome the problematic frequency range and generate the low dynamic stiffness by providing hydro mounts that are tuned for problematic frequency ranges. In such hydro mounts, during low frequency and higher amplitude, there is a possibility of formation of cavitation noise and collapse of vapor bubbles in the working fluid when local static pressure falls below the vapor pressure of the working fluid. Cavitation noise is an irritating noise that is very difficult to identify whether it is being generated form the mount or not.
Therefore, there is a need for device that suppresses cavitation by ensuring that the local static pressure is not falling below a limit.
SUMMARY OF THE INVENTION
The following presents a simplified summary of the subject matter in order to provide a basic understanding of some 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 is to present some concepts of the subject matter in a simplified form as a prelude to the more detailed description that is presented later.
A hydraulic engine mount disclosed herein addresses the above-mentioned need for device that suppresses cavitation by ensuring that the local static pressure is not falling below a limit. The hydraulic engine mount comprises a membrane, an orifice body, a hole positioned on the membrane, and a first gap. The membrane is inserted into a slot of an orifice body, where the membrane comprises a side surface that is parallel and in contact with an inner surface of the orifice body. The hole is positioned on the side surface and extends upwardly from the side surface of the membrane towards a main liquid chamber and the hole is in fluid communication with a groove that is present on inner surface of the orifice body. The first gap is provided between the inner surface of the orifice body and the side surface of the membrane. When the membrane moves upwards towards the main liquid chamber due to pressure generation in the liquid, the first gap increases to allow a liquid to flow from the groove of the orifice body, through the hole of the membrane, and towards the main liquid chamber, and where the liquid flow releases the pressure generation in the liquid and suppress cavitation.
In an embodiment, the hole that connects with the main liquid chamber is provided on a thick part that is positioned at a centre section of the membrane. In an embodiment, multiple numbers of the holes are present on the side surface of the membrane, which are in fluid communication with multiple numbers of the grooves that are positioned on the inner surface of the orifice body. When the amount of the liquid flowing to the main liquid chamber increases, it further releases the pressure generation in the liquid and suppresses the cavitation. In an embodiment, the side surface of the membrane and the inner surface of the orifice body are relatively inclined with each other. As a result of the relative inclination, the first gap formed between the side surface of the membrane and the inner surface of the orifice body is inclined to establish the flow of the liquid towards the main liquid chamber during the upward movement of the membrane.

In an embodiment, the side surface of the membrane and the inner surface of the orifice body are relatively cylindrical with each other. As a result of the relative cylindrical orientation, the first gap formed between the side surface of the membrane and the inner surface of the orifice body is cylindrical to establish the flow of the liquid towards the main liquid chamber during the upward movement of the membrane. In an embodiment, a lower surface of the membrane is in contact with a lower portion of the orifice body, where the lower surface is a thick cylindrical portion positioned at a center section of the membrane. The grooves are positioned at a middle section of the orifice body and are in communication with centrally positioned holes present in the membrane to transfer the liquid from the grooves, through the holes and to the main liquid chamber side during a rise in the pressure.
In an embodiment, the hydraulic engine mount further comprises a sealing rib that is positioned on the lower surface of the thick cylindrical portion of the membrane, where when the membrane moves to a sub liquid chamber, which is a diaphragm side, the contact between the sealing rib of the membrane and the lower surface of the orifice body is increased to suppress the decrease in damping. In an embodiment, the hydraulic engine mount further comprises a second gap that is positioned between the lower surface of the membrane and the orifice body, which makes contact with each other during the movement of the liquid, where the liquid flow between the main liquid chamber and the sub liquid chamber, which is a diaphragm side, when a input amplitude is small, the fluid resonance occurs (for example, a damping peak is generated at idle).
These and other objects, embodiments and advantages of the present invention will become readily apparent to those skilled in the art from the following detailed description of the embodiments having reference to the attached figures, the invention not being limited to any particular embodiments disclosed.
BRIEF DESCRIPTION OF FIGURES

The foregoing and further objects, features and advantages of the present subject matter will become apparent from the following description of exemplary embodiments with reference to the accompanying drawings, wherein like numerals are used to represent like elements.
It is to be noted, however, that the appended drawings along with the reference numerals illustrate only typical embodiments of the present subject matter, and are therefore, not to be considered for limiting its scope, for the subject matter may admit to other equally effective embodiments.
FIG. 1A exemplarily illustrates a front perspective view of a first embodiment of the hydraulic engine mount positioned within the damping assembly, as an example embodiment of the present disclosure.
FIG. 1B exemplarily illustrates a partial cut away view of the first embodiment of the hydraulic engine mount positioned within the damping assembly, as an example embodiment of the present disclosure.
FIG. 1C exemplarily illustrates a top perspective view the first embodiment of the hydraulic engine mount, as an example embodiment of the present disclosure.
FIG. 1D exemplarily illustrates a top plan view the first embodiment of the hydraulic engine mount, as an example embodiment of the present disclosure.
FIG. 1E exemplarily illustrates a sectional view of a first embodiment of the hydraulic engine mount, as an example embodiment of the present disclosure.
FIG. 1F exemplarily illustrates a detailed view of the portion marked B of the first embodiment of the hydraulic engine mount in FIG. 1E, as an example embodiment of the present disclosure.

FIG. 2A exemplarily illustrates a front perspective view of a second embodiment of the hydraulic engine mount positioned within the damping assembly, as an example embodiment of the present disclosure.
FIG. 2B exemplarily illustrates a partial cut away view of the second embodiment of the hydraulic engine mount positioned within the damping assembly, as an example embodiment of the present disclosure.
FIG. 2C exemplarily illustrates a top perspective view the second embodiment of the hydraulic engine mount, as an example embodiment of the present disclosure.
FIG. 2D exemplarily illustrates a top plan view the second embodiment of the hydraulic engine mount, as an example embodiment of the present disclosure.
FIG. 2E exemplarily illustrates a sectional view of a second embodiment of the hydraulic engine mount, as an example embodiment of the present disclosure.
FIG. 2F exemplarily illustrates a detailed view of the portion marked D of the second embodiment of the hydraulic engine mount in FIG. 2E, as an example embodiment of the present disclosure.
DETAILED DESCRIPTION
Exemplary embodiments now will be described with reference to the accompanying drawings. 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 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 skills 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.

The figures depict a simplified structure only showing some elements and functional entities, all being logical units whose implementation may differ from what is shown. The connections shown are logical connections; the actual physical connections may be different. It is apparent to a person skilled in the art that the structure may also comprise other functions and structures.
Referring to FIGS. 1A-1D, FIG. 1A exemplarily illustrates a front perspective view of a first embodiment of the hydraulic engine mount positioned within the damping assembly, as an example embodiment of the present disclosure. FIG. 1B exemplarily illustrates a partial cut away view of the first embodiment of the hydraulic engine mount positioned within the damping assembly, as an example embodiment of the present disclosure. As shown in FIG. 1B, the hydraulic engine mount 10 is positioned below the Z stopper 16, the body bracket 17, the main rubber elements 18, and the main liquid chamber 12. FIG. 1C exemplarily illustrates a top perspective view the first embodiment of the hydraulic engine mount 10, as an example embodiment of the present disclosure. FIG. 1D exemplarily illustrates a top plan view the first embodiment of the hydraulic engine mount 10, as an example embodiment of the present disclosure.
Referring to FIGS. 1E and 1F, FIG. 1E exemplarily illustrates a sectional view of a first embodiment of the hydraulic engine mount 10, as an example embodiment of the present disclosure. FIG. 1F exemplarily illustrates a detailed view of the portion marked B of the first embodiment of the hydraulic engine mount 10 in FIG. 1E, as an example embodiment of the present disclosure. The hydraulic engine mount 10 designed for pressure generation in the liquid so that the cavitation in the working fluid is suppressed. The hydraulic engine mount 10 comprises a membrane 6, an orifice body 11, a hole 3 positioned on the membrane 6, and a first gap 4. As used herein, the “membrane” is a flexible unit that is designed to work with the working fluid so that it compensates for the pressure difference generated in the working fluid. As used herein, the “orifice body” is a portion of the assembly that allows the housing of the membrane as mentioned before.

The membrane 6 is inserted into a slot 14 of an orifice body 11, where the membrane 6 comprises a side surface 1 that is parallel and in contact with an inner surface 5 of the orifice body 11. The slot 14 of an orifice body 11 is designed in a manner to accommodate the shape of the membrane 6, so that the side surface 1 forms a parallel contact with the inner surface 5 of the orifice body 11. The hole 3 is positioned on the side surface 1 and extends upwardly from the side surface 1 of the membrane 6 towards a main liquid chamber 12 and the hole 3 is in fluid communication with a groove 2, as shown in FIG. 1B, which is present on inner surface 5 of the orifice body 11. The hole 3, for example, is in the form of a conduit that extends from the side surface 1 horizontally and extends up to the main liquid chamber vertically to transfer the liquid.
As shown in FIG. 1F, the first gap 4 is provided between the inner surface 5 of the orifice body 11 and the side surface 1 of the membrane 6. When the membrane 6 moves upwards towards the main liquid chamber 12 due to pressure generation in the liquid, the first gap 4 increases to allow a liquid to flow from the groove 2 of the orifice body 11, through the hole 3 of the membrane 6, and towards the main liquid chamber 12, and where the liquid flow releases the pressure generation in the liquid and suppress cavitation. The pressure generation in the liquid moves the membrane 6 upwards towards the main liquid chamber 12, which increases the dimensions of the first gap 4 thus drawing the liquid from the groove 2 of the orifice body 11. This liquid is then drawn to flow through the hole 3 of the membrane 6 towards the main liquid chamber 12 where the flow of the liquid releases the pressure formation in the liquid and suppress cavitation of the liquid.
As shown in FIG. 1E, which is the first embodiment of the hydraulic engine mount 10, the side surface 1 of the membrane 6 and the inner surface 5 of the orifice body 11 are relatively inclined with each other. As a result of the relative inclination, the first gap 4 formed between the side surface 1 of the membrane 6 and the inner surface 5 of the orifice body 11 is inclined to establish the flow of the liquid towards the main liquid chamber 12 during the upward movement of the membrane 6. As shown in FIG. 1E, the hole 3 that connects with the main liquid chamber 12 is provided on a thick part that is positioned at a

center section of the membrane 6. As shown in FIG. 1F, in an embodiment, multiple numbers of the holes 3 are present on the side surface 1 of the membrane 6, which are in fluid communication with multiple numbers of the grooves 2 that are positioned on the inner surface 5 of the orifice body 11. When the amount of the liquid flowing to the main liquid chamber 12 increases, it further releases the pressure generation in the liquid and suppresses the cavitation. If there is an increase in the amount of fluid that is flowing towards the main liquid chamber 12, then the extend of variation in the dimensions of the first gap 4 is also more, which allows a larger amount of the fluid to be transferred to the main liquid chamber 12, thereby reducing the cavitation.
Referring to FIGS. 2A-2D, FIG. 2A exemplarily illustrates a front perspective view of a second embodiment of the hydraulic engine mount 10 positioned within the damping assembly, as an example embodiment of the present disclosure. FIG. 2B exemplarily illustrates a partial cut away view of the second embodiment of the hydraulic engine mount 10 positioned within the damping assembly, as an example embodiment of the present disclosure. FIG. 2C exemplarily illustrates a top perspective view the second embodiment of the hydraulic engine mount 10, as an example embodiment of the present disclosure. FIG. 2D exemplarily illustrates a top plan view the second embodiment of the hydraulic engine mount 10, as an example embodiment of the present disclosure.
Referring to FIGS. 2E and 2F, FIG. 2E exemplarily illustrates a sectional view of a second embodiment of the hydraulic engine mount 10, as an example embodiment of the present disclosure. FIG. 2F exemplarily illustrates a detailed view of the portion marked D of the second embodiment of the hydraulic engine mount 10 in FIG. 2E, as an example embodiment of the present disclosure. As shown in FIG. 2E, in an embodiment, the side surface 1 of the membrane 6 and the inner surface 5 of the orifice body 11 are relatively cylindrical with each other. In other words, the side surface 1 of the membrane 6 and the inner surface 5 of the orifice body 11 define a substantially vertical or cylindrical contact between each other. As a result of the relative cylindrical orientation, the first gap 4 formed between the side surface 1 of the membrane 6 and the inner surface 5 of the orifice body 11

is cylindrical to establish the flow of the liquid towards the main liquid chamber 12 during the upward movement of the membrane 6.
Referring to FIGS. 2F, a lower surface 9 of the membrane 6 is in contact with a lower portion of the orifice body 11, where the lower surface is a thick cylindrical portion positioned at a centre section of the membrane 6. The grooves 2 are positioned at a middle section of the orifice body 11 and are in communication with centrally positioned holes 3 present in the membrane 6 to transfer the liquid from the grooves 2, through the holes 3 and to the main liquid chamber 12 side during a rise in the pressure. As shown in FIG. 2F, the hydraulic engine mount 10 further comprises a sealing rib 7 that is positioned on the lower surface of the thick cylindrical portion 6a of the membrane 6, where when the membrane 6 moves to a sub liquid chamber 13, which is a diaphragm side 15, where the contact between the sealing rib 7 of the membrane 6 and the lower surface of the orifice body 11 is increased to suppress the decrease in damping. The hydraulic engine mount 10 also comprises a second gap 8 that is positioned between the lower surface of the membrane 7 and the orifice body 11, which makes contact with each other during the movement of the liquid. The liquid flow is between the main liquid chamber 12 and the sub liquid chamber 13, which is the diaphragm side 15, and when the input amplitude is small, fluid resonance occurs (for example, a damping peak is generated at idle). In other words, when input amplitude is small, for example, idle vibration, the second gap 8 is maintained to achieve the peak resonance.
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. In the drawings and specification, there have been disclosed exemplary embodiments of the invention. Although specific terms are

employed, they are used in a generic and descriptive sense only and not for purposes of limitation of the scope of the invention.

We Claim:
1. A hydraulic engine mount comprising:
a membrane that is inserted into a slot of an orifice body, wherein the membrane comprises a side surface that is parallel and in contact with an inner surface of the orifice body;
a hole that is positioned and extending upwardly from the side surface of the membrane towards a main liquid chamber, wherein the hole is in fluid communication with a groove that is present on inner surface of the orifice body; and
a first gap provided between the inner surface of the orifice body and the side surface of the membrane, wherein when the membrane moves upwards towards the main liquid chamber due to pressure generation in the liquid, the first gap increases to allow a liquid to flow from the groove of the orifice body, through the hole of the membrane, and towards the main liquid chamber, and wherein the liquid flow releases the pressure generation in the liquid and suppress cavitation.
2. The hydraulic engine mount as claimed in claim 1, wherein the hole that connects with the main liquid chamber is provided on a thick part that is positioned at a center section of the membrane.
3. The hydraulic engine mount as claimed in claim 1, wherein a plurality of the holes are present on the side surface of the membrane, which are in fluid communication with a plurality of the grooves that are positioned on the inner surface of the orifice body, wherein an amount of the liquid flowing to the main liquid chamber increases, which further releases the pressure generation in the liquid and suppresses the cavitation.
4. The hydraulic engine mount as claimed in claim 3, wherein the side surface of the membrane and the inner surface of the orifice body are relatively inclined with each other, and as a result, the first gap formed between the side surface of the membrane and the inner surface of the orifice body is inclined to establish the flow of the liquid towards the main

liquid chamber during the upward movement of the membrane.
5. The hydraulic engine mount as claimed in claim 1, wherein the side surface of the membrane and the inner surface of the orifice body are relatively cylindrical with each other, and as a result, the first gap formed between the side surface of the membrane and the inner surface of the orifice body is cylindrical to establish the flow of the liquid towards the main liquid chamber during the upward movement of the membrane.
6. The hydraulic engine mount as claimed in claim 5, further comprising a lower surface of the membrane being in contact with a lower portion of the orifice body, wherein the lower surface is a thick cylindrical portion positioned at a center section of the membrane, wherein the grooves are positioned at a middle section of the orifice body and are in communication with centrally positioned holes present in the membrane to transfer the liquid from the grooves, through the holes and to the main liquid chamber side during a rise in the pressure.
7. The hydraulic engine mount as claimed in claim 6, further comprising a sealing rib that is positioned on the lower surface of the thick cylindrical portion of the membrane, wherein when the membrane moves to a sub liquid chamber, which is a diaphragm side, the contact between the sealing rib of the membrane and the lower surface of the orifice body is increased to suppress the decrease in damping.
8. The hydraulic engine mount as claimed in claim 7, further comprising a second gap that is positioned between the lower surface of the membrane and the orifice body, which makes contact with each other during the movement of the liquid, wherein the liquid flow is between the main liquid chamber and the sub liquid chamber, which is the diaphragm side, and when an input amplitude is small, the fluid resonance occurs.