FORM-2
THE PATENT ACT,1970
(39 OF 1970)
AND
THE PATENT RULES, 2003
(As Amended)
COMPLETE SPECIFICATION (See section 10;rule 13)
"SMART MOUNT TECHNOLOGY TO INCREASE Ks IN Z-DIRECTION"
We, 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:

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SMART MOUNT TECHNOLOGY TO INCREASE Ks IN Z-DIRECTION
FIELD OF INVENTION
Embodiments of the present application illustrates engine mounts, more specifically, to an engine mount technology that increases Ks in Z-direction.
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.
In case of EV (Electric Vehicle) there is no Noise, Vibration and Harshness (NVH) issue at low frequency range (5-100 Hz), but the issue occurs @ high frequency range (500-2500 Hz). At this high frequency range there is NVH issue due to resonance of the rubber in the motor mount. The human ear perceives low frequencies of a high acoustic pressure level (e.g., 120 dB) as equally loud as high frequencies with a lower acoustic pressure level (e.g., 80 dB). In case of EV the issue is with high frequency noise which needs attention.
Therefore, there is a need for an increased insulation at high frequencies of the e-engine because they appear louder for humans. There are lot of design factors with which the resonance behaviour of the rubber can be reduced to reduce noise. Increasing the Z-direction stiffness of the motor mount is one of the factors that can reduce the resonant behaviour of the rubber by shifting the resonant frequency of the rubber to higher frequencies.
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 smart motor / sub frame / cradle mount that addresses the need for an increased insulation at high frequencies of the e-engine because they appear louder for humans. Accordingly, the design factors are taken into consideration with which the resonance behaviour of the rubber can be reduced to reduce noise. The present invention deals with the stiffness increase in Z-direction of motor mount to achieve the goal of reducing the resonance behaviour of the rubber.
The motor mount disclosed here reduces resonance behaviour of rubber present in the motor mount by increasing stiffness in a Z-direction and moving resonance frequency of the rubber to a higher frequency. The motor mount is a smart mount designed considering, for example, e-motor, subframe, cradle, etc. The motor mount comprises an inner tube, an outer tube, and a rubber arm. The inner tube comprises a first protrusion shape with an outer diameter (OD), and the OD is modifiable to change spring ratio of the motor mount along the Z: X: Y direction and stiffness (Ks) value in the Z-direction. The outer tube comprises a second protrusion shape with an inner diameter (ID) that is concentrically positioned with the inner tube, and the ID of the second protrusion shape is modifiable to change spring ratio of the motor mount along the Z: X: Y direction and the Ks value in the Z-direction. The rubber arm is sandwiched between the inner tube and the outer tube and comprises a predefined geometry. The shape and angle of the rubber arm is modifiable to change spring ratio of the motor mount along the Z: X: Y direction and Ks value in the Z-direction.
In an embodiment, the inner tube is fastened in vertical Z-direction and the inner tube comprises of through hole to facilitate the assembly, and the Ks in the Z-direction is increased by increasing the OD size of the first protrusion shape provided on the inner tube. In an embodiment, the Ks value in the Z-direction is increased by adjusting the angle of the first protrusion shape provided on the inner tube. In an embodiment, the Ks value in the Z-direction is increased by adjusting the inner diameter size of the second protrusion shape, which is formed as an emboss that is provided on the outer tube.
In an embodiment, the Ks value in the Z-direction is increased by adjusting the position of the second protrusion shape provided on the outer tube. In an embodiment, the Ks value in the Z-direction is increased by adjusting the angle of the rubber arm. In an embodiment, the Ks value in the Z-direction is increased by adjusting positioning of the inner tube on the lower side of the rubber arm and adjusting the positioning of the second protrusion shape provided on the

outer tube. In an embodiment, the motor mount further comprises a void that is positioned on the rubber arm, and the Ks value in the X and Y direction is changed by size of the void that is positioned on the rubber arm.
The spring ratio (Z: X: Y) is changed by the OD size of the protrusion shape provided on the inner tube of the bush. The inner tube is fastened in Vertical Z-direction. The Ks value in the Z-direction and Spring ratio (Z:X: Y) can be changed depending on the size of the OD. The inner tube of the bush can be provided with angular shape. The Ks value in the Z-direction and Spring ratio (Z:X: Y) can be tuned depending on the angle of the inner tube. The spring ratio (Z: X: Y) can be changed by the ID size of the protrusion shape (emboss) provided on the outer tube of the bush. The Ks value in the Z-direction and Spring ratio (Z:X: Y) can be changed by the ID size of the protrusion shape (emboss) provided on the outer tube of the bush. The spring ratio (Z: X: Y) can be changed by the position of the protrusion shape (emboss) provided on the outer tube of the bush. The Ks value in the Z-direction and Spring ratio (Z:X: Y) can be adjusted by moving the position of the protrusion shape (emboss) provided on the outer tube of the bush. The rubber arm shape, which is similar to cone type mount can be provided. The Ks value in the Z-direction and Spring ratio (Z:X: Y) can be changed by rubber arm shape and angle.
The Ks value in the Z-direction can be changed by the position of the inner tube on the lower side of the rubber arm and the position of the protrusion shape (emboss) provided on the outer tube. The Ks value in the Z-direction and Spring ratio (Z:X: Y) can be changed by the position of the inner tube on the lower side of the rubber arm and the position of the protrusion shape (emboss) provided on the outer tube. The void can be provided in the rubber arm. The Ks value in the X and Y direction can be changed by the void size provided on the rubber arm.
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 a partial cutaway view of the motor mount configured to increase Ks in Z-direction, as an example embodiment in the present disclosure.
FIGURE 1B exemplarily illustrates another partial cutaway view of the motor mount configured to increase Ks in Z-direction, as an example embodiment in the present disclosure.
FIGURE 1C exemplarily illustrates an isometric view of the motor mount configured to increase Ks in Z-direction, as an example embodiment in the present disclosure.
FIGURE 1D exemplarily illustrates a top view of the motor mount configured to increase Ks in Z-direction, as an example embodiment in the present disclosure.
FIGURE 1E exemplarily illustrates a bottom view of the motor mount configured to increase Ks in Z-direction, as an example embodiment in the present disclosure.
FIGURE 2 exemplarily illustrates a cutaway drawing that shows the motor mount after it is assembled in the engine body of the vehicle, as an example embodiment in the present disclosure.
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

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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.
GLOSSARY:
1. Motor mount (100)
2. Inner tube (102)

3. First protrusion shape (104)
4. Outer tube (106)
5. Second protrusion shape (emboss) (108)
6. Rubber arm (110)
7. Through hole (112)
8. Void (114)
Referring to FIGURES 1A – 1E, FIGURE 1A exemplarily illustrates a partial cutaway view of the motor mount (100) configured to increase Ks in Z-direction, FIGURE 1B exemplarily illustrates another partial cutaway view of the motor mount (100) configured to increase Ks in Z-direction, FIGURE 1C exemplarily illustrates an isometric view of the motor mount (100) configured to increase Ks in Z direction, FIGURE 1D exemplarily illustrates a top view of the motor mount configured to increase Ks in Z-direction, and FIGURE 1E exemplarily illustrates a bottom view of the motor mount configured to increase Ks in Z-direction, as an example embodiment in the present disclosure. FIGURE 2 exemplarily illustrates a cutaway drawing that shows the motor mount (100) after it is assembled in the engine body (202) of the vehicle, as an example embodiment in the present disclosure.
As shown in FIGURES 1A and 1B, the motor mount (100) disclosed here reduces resonance behaviour of rubber present in the motor mount (100) by increasing stiffness in a Z-direction and moving resonance frequency of the rubber to a higher frequency. The motor mount (100) comprises an inner tube (102), an outer tube (106), and a rubber arm (110). The inner tube (102) comprises a first protrusion shape (104) with an outer diameter (OD), and the OD is modifiable to change spring ratio of the motor mount (100) along the Z: X: Y direction and stiffness (Ks) value in the Z-direction.
The outer tube (106) comprises a second protrusion shape (108) with an inner diameter (ID) that is concentrically positioned with the inner tube (102). The ID of the second protrusion shape (108) is modifiable to change spring ratio of the motor mount (100) along the Z: X: Y direction and the Ks value in the Z-direction. The rubber arm (110) is sandwiched between the inner tube (102) and the outer tube (106), and the rubber arm (110) comprises a predefined geometry. The shape and angle of the rubber arm (110) is modifiable to change spring ratio of the motor mount (100) along the Z: X: Y direction and Ks value in the Z-direction. In other words, a mechanism of Ks that increases in Z axis comprises multiple factors. A spring ratio

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(Z: X: Y) is changed by the OD size of the first protrusion shape (104) provided on the inner tube (102) of the bush or motor mount (100), where the Ks value in the Z-direction and spring ratio (Z : X : Y) is changed depending on the size of the OD, where the inner tube (102) of the bush is provided with angular shape and the Ks value in the Z-direction and spring ratio (Z : X : Y) is tuned depending on the angle of the inner tube (102).
The inner tube (102) is fastened in vertical Z-direction and the inner tube (102) comprises of through hole (112) to facilitate the assembly, and the Ks in the Z-direction is increased by increasing the OD size of the first protrusion shape (104) provided on the inner tube (102). The Ks value in the Z-direction and the Spring ratio (Z:X: Y) can be changed depending on the size of the OD of the protrusion shape (104) provided on an inner tube (102). Furthermore, the Ks value in the Z-direction is increased by adjusting the angle of the first protrusion shape (104) provided on the inner tube (102). In effect, the Ks value in the Z-direction & Spring ratio (Z:X: Y) can be tuned depending on the angle of the inner tube (102). The Ks value in the Z-direction is also increased by adjusting the inner diameter size of the second protrusion shape (108), which is formed as an emboss that is provided on the outer tube (106). In effect, the Ks value in the Z-direction and Spring ratio (Z:X: Y) can be changed by the ID size of the protrusion shape (108) provided on the outer tube (106) of the bush or motor mount (100).
The Ks value in the Z-direction is increased by adjusting the position of the second protrusion shape (108) provided on the outer tube (106). In effect, the Ks value in the Z-direction & Spring ratio (Z:X:Y) can be adjusted by moving the position of the protrusion shape (108) provided on the outer tube (106) of the bush or motor mount (100). The Ks value in the Z-direction is increased by adjusting the angle of the rubber arm (110). In effect, the Ks value in the Z-direction and Spring ratio (Z:X:Y) can be changed by rubber arm shape (110) and angle. The Ks value in the Z-direction is increased by adjusting positioning of the inner tube (102) on the lower side of the rubber arm (110) and adjusting the positioning of the second protrusion shape (108) provided on the outer tube (106). In effect, the Ks value in the Z-direction can be changed by the position of the inner tube (102) on the lower side of the rubber arm (110) and the position of the protrusion shape (emboss) provided on the outer tube (106). The motor mount (100) further comprises a void (114) that is positioned on the rubber arm (110), wherein the Ks value in the X and Y direction is changed by size of the void (114) that is positioned on the rubber arm (110). In effect, the Ks value in the X and Y direction can be changed by the void size provided on the rubber arm (110).

In short, the key mechanism of increasing Ks in Z axis is by maintaining ratio of Kx/Kz = 1~1.5 and Ky/Kz =1~1.5. The factors that need to be considered to increase Ks in Z axis include:
1) The Ks value in the Z-direction can be increased by the outer diameter size of the first protrusion shape (104) provided on the inner tube (102).
2) The Ks value in the Z-direction can be increased by the angle of the first protrusion shape (104) provided on the inner tube (102).
3) The Ks value in the Z-direction can be increased by the inner diameter size of the second protrusion shape (emboss) (108) provided on the outer tube (106).
4) The Ks value in the Z-direction can be increased by the position of the second protrusion shape (emboss) (108) provided on the outer tube (106).
5) The Ks value in the Z-direction can be increased by adjusting the angle of the rubber arm (110).
6) The Ks value in the Z-direction can be changed by the position of the inner tube (102) on the lower side of the rubber arm (110) and the position of the second protrusion shape (emboss) (108) provided on the outer tube (106).
7) The Ks value in the X and Y direction can be changed by the void (114) size provided on the rubber arm.
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 motor mount (100) that reduces resonance behaviour of rubber present in the motor
mount (100) by increasing stiffness in a Z-direction and moving resonance frequency of the
rubber to a higher frequency, the motor mount (100) comprising:
an inner tube (102) comprising a first protrusion shape (104) with an outer diameter (OD), wherein the OD is modifiable to change spring ratio of the motor mount (100) along the Z: X: Y direction and stiffness (Ks) value in the Z-direction;
an outer tube (106) comprising a second protrusion shape (108) with an inner diameter (ID) that is concentrically positioned with the inner tube (102), wherein the ID of the second protrusion shape (108) is modifiable to change spring ratio of the motor mount (100) along the Z: X: Y direction and the Ks value in the Z-direction; and
a rubber arm (110) that is sandwiched between the inner tube (102) and the outer tube (106), wherein the rubber arm (110) comprises a predefined geometry, wherein shape and angle of the rubber arm (110) is modifiable to change spring ratio of the motor mount (100) along the Z: X: Y direction and Ks value in the Z-direction.
2. The motor mount (100) as claimed in claim 1, wherein the inner tube (102) is fastened in vertical Z-direction and the inner tube (102) comprises of through hole (112) to facilitate the assembly, and wherein the Ks in the Z-direction is increased by increasing the OD size of the first protrusion shape (104) provided on the inner tube (102).
3. The motor mount (100) as claimed in claim 1, wherein the Ks value in the Z-direction is increased by adjusting the angle of the first protrusion shape (104) provided on the inner tube (102).
4. The motor mount (100) as claimed in claim 1, wherein the Ks value in the Z-direction is increased by adjusting the inner diameter size of the second protrusion shape (108), which is formed as an emboss that is provided on the outer tube (106).

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5. The motor mount (100) as claimed in claim 1, wherein the Ks value in the Z-direction is increased by adjusting the position of the second protrusion shape (108) provided on the outer tube (106).
6. The motor mount (100) as claimed in claim 1, wherein the Ks value in the Z-direction is increased by adjusting the angle of the rubber arm (110).
7. The motor mount (100) as claimed in claim 1, wherein the Ks value in the Z-direction is increased by adjusting positioning of the inner tube (102) on the lower side of the rubber arm (110) and adjusting the positioning of the second protrusion shape (108) provided on the outer tube (106).
8. The motor mount (100) as claimed in claim 1, further comprising a void (114) that is positioned on the rubber arm (110), wherein the Ks value in the X and Y direction is changed by size of the void (114) that is positioned on the rubber arm (110).