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

CONVENTIONAL ENGINE MOUNT TECHNOLOGY TO INCREASE KS IN Y
DIRECTION
FIELD OF INVENTION
The present invention relates generally to an engine mount or powertrain mount and more particularly to a conventional engine mounting.
BACKGROUND OF THE INVENTION
As known in the common art, there is a need to reduce vibration that occurs between two mechanical structures, for example, adjacent portions in an engine mount, or engine and the engine body. The more important aspect of this is to effectively reduce the vibrations on the users and other equipment as well. One such example would be of reducing vibration on parts of a car present inside the seating cabin, where the vibration is caused due to improper vibration absorbing means present in the engine chassis. In the current art, isomeric materials or rubber like materials are used to reduce such vibrations in the engine and optimize static stiffness Ks, in all the vertical (Z), Lateral (Y) and longitudinal (X) direction. The isomeric material is placed in a selected position of the engine to absorb the effect of the vibration of the engine during operation. The thickness and other material properties of the isomeric material are chosen depending on available packaging space, Type and Engine weight, Torque, environment etc. and also the shape of the adjoining parts of the engine where the engine is mounted. However, in some cases there is need of increasing static stiffness Ks in the lateral “Y” direction for which there are some limitation in specific shapes of engine mounts, which in effect may deteriorate the attenuation and Noise, Vibration, and Harshness (NVH) performance when vibrations occur in Y direction. Therefore, there is a need to have higher static stiffness Ks in Lateral direction for a conventional engine assembly, or in other words, increased static stiffness Ks in Y direction to constrain vibrations in Y direction and improve NVH performance.
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.
The present invention overcomes issue of achievement of higher Ks in arm lateral direction of conventional engine mount. In order to achieve this a Rubber pad is provided on arms that can be used to optimize stiffness in lateral direction of the arms of conventional engine mount. The engine mount disclosed here provides higher static stiffness Ks in Lateral direction for a conventional engine assembly, or in other words, increases static stiffness Ks in Y direction to constrain vibrations in Y direction and increase Noise, Vibration, and Harshness (NVH) performance.
The Engine mount disclosed here increases static stiffness (Ks) in a lateral (Y) direction and this engine mount comprises a mounting member and one or more pad members. The mounting member supports an engine of a vehicle and the pad members are positioned at one or more positions along body of the mounting member. The pad members absorb vibrations that are generated on the mounting member during operation of the engine and increases the static stiffness (Ks) in the lateral (Y) direction. In an embodiment, the pad members are positioned on an elastic arm (main rubber element), that is connected to the mounting member, and the pad members are moulded integrally with the elastic arm in the lateral (Y) direction and comes in contact with the mounting member or the body of the vehicle to increase the static stiffness (Ks) in the lateral (Y) direction.
In an embodiment, value of the static stiffness (Ks) in the lateral (Y) direction is variable based on change in size of contact surface area of each pad member with one of the elastic arm and the mounting member. An adhesion free contact of the pad members with one of the elastic arm and the mounting member increases durability of the mounting member. In an embodiment, value of the static stiffness (Ks) in the Y direction is variable based on positioning of the pad members along the elastic arm (main rubber element), of the mounting member and the positioning includes positioning of the pad members above and below the elastic arm.
In an embodiment, the pad members are positioned within a clearance between a housing bracket of the mounting member and body of the vehicle, and wherein Ks in the lateral (Y) direction is variable based on amount of clearance between the housing bracket and the body of the vehicle.

In an embodiment, the pad members are positioned under compression between the housing bracket of the mounting member and body of the vehicle, and the Ks in the lateral (Y) direction is variable based on compression experienced by the one or more pad members positioned between the housing bracket and the body of the vehicle.
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.
Figures 1A-3B show different type of engine mounts, wherein anti-vibration systems make use of such different types of engine mounts / powertrain mounts to isolate the vibration from road and powertrain.
Figure 4A shows a front isometric view the engine mount showing the mounting members and pad members, as an example embodiment of the present invention.
Figure 4B shows a front perspective view the engine mount showing the mounting members and pad members, as an example embodiment of the present invention.
Figure 4C shows a side sectional view of the engine mount showing the elastic arm and pad members, as an example embodiment of the present invention.
Figure 4D shows another side sectional view of the engine mount showing the elastic arm and pad members, as an example embodiment of the present invention.
Figure 4E shows an enlarged view of the portion marked A in the side sectional view of the engine mount, as shown in Figure 4D, as an example embodiment of the present invention.

Figure 4F shows a partial front view of the elastic arm and pad members, as an example embodiment 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
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.
Figure 1A-3B shows different type of engine mounts, wherein anti-vibration systems make use of such different types of engine mounts / powertrain mounts to isolate the vibration from road and powertrain.
Figures 4A-4F show different views of the engine mount 100 showing the mounting members 102 and pad members, as an example embodiment of the present invention. Figure 4A shows a front isometric view the engine mount 100 showing the mounting members 102 and pad members 104, as an example embodiment of the present invention. Figure 4B shows a front perspective view the engine mount 100 showing the mounting members 102 and pad members 104, as an example embodiment of the present invention. Figure 4C shows a side sectional view of the engine mount 100 showing the elastic arm 106 and pad members 104, as an example embodiment of the present invention. Figure 4D shows another side sectional view of the engine mount100 showing the elastic arm 106 and pad members 104, as an example embodiment of the present invention. Figure 4E shows an enlarged view of the portion marked A in the side sectional view of the engine mount 100, as shown in Figure 4D, as an example embodiment of the present invention. Figure 4F shows a partial front view of the elastic arm 106 and pad members 104, as an example embodiment of the present invention. The Engine mount 100 disclosed here increases static stiffness (Ks) in a

lateral (Y) direction and this engine mount 100 comprises a mounting member 102 and one or more pad members 104. The mounting member 102 as disclosed herein, is a mounting unit that is designed to support an engine or engine part during motion of the vehicle. The pad members 104 are units that are made of shock absorbing material to absorb the impact and jerk related forces that occur during motion of the vehicle.
The mounting member 102 supports an engine of a vehicle and the pad members 104 are positioned at one or more positions, for example, 108a and 108b as shown in Figure 4B, along body of the mounting member 102. The positions such as 108a and 108b as shown in Figure 4B, of the pad members 104 can be any position depending on the contact surfaces, size and relative positioning of the engine and the mounting member 102. The pad members 104 absorb vibrations that are generated on the mounting member 102 during operation of the engine and increases the static stiffness (Ks) in the lateral (Y) direction. In an embodiment, the pad members 104 are positioned on an elastic arm (main rubber element) 106 that is connected to the mounting member 102, and the pad members 104 are positioned in the lateral (Y) direction along the elastic arm (main rubber element), 106 and in contact with the elastic arm (main rubber element), 106 to increase the static stiffness (Ks) in the lateral (Y) direction.
In an embodiment, value of the static stiffness (Ks) in the lateral (Y) direction is variable based on change in size of contact surface area of each pad member 104 with one of the elastic arm (main rubber element), 106 and the mounting member 102. An adhesion free contact of the pad members 104 with one of the elastic arm (main rubber element), 106 and the mounting member 102 increases durability of the mounting member 102. In this case, the additional pad 104 provided in Y direction is provided on rubber arm or elastic arm (main rubber element), 106. The Ks value in the Y direction is therefore varies depending on the size of the contact surface of the pad shape. Since the pad shape part is not adhered, the decrease in durability is reduced. Value of the static stiffness (Ks) in the Y direction is variable based on positioning of the pad members 104 along the elastic arm (main rubber element) 106 of the mounting member102, and the positioning includes positioning of the pad members 104 above and below the elastic arm (main rubber element) 106.
The static stiffness (Ks) in the Y direction is dependent based on various factors, most importantly, based on positioning of the shock absorbing units or the positioning of the pad members 104 along

the elastic arm (main rubber element) 106 of the mounting member102. The pad members 104 are also designed to be positioned on sides and other predefined portions of the elastic arm (main rubber element) 106 depending on the desired output of the static stiffness (Ks) in the Y direction. The number of pad members 104 positioned along the elastic arm (main rubber element) 106 also contribute to the desired output of the static stiffness (Ks) in the Y direction.
As shown in Figure 4C, 4D and 4E, the pad members 104 are also positioned within a clearance 110 between a housing bracket of the mounting member 102 and body of the vehicle, and wherein Ks in the lateral (Y) direction is variable based on amount of clearance110 between the housing bracket and the body of the vehicle. The positing of the pad members 104 also alters the clearance 110 between a housing bracket of the mounting member 102 and body of the vehicle, which in turn affects the Ks in the lateral (Y) direction. The effect of change of Ks in the lateral (Y) direction due to variation in clearance 110 due to the added pad members 104 is more evident in larger engines. In an embodiment, the pad members 104 are positioned under compression between the housing bracket of the mounting member 102 and body of the vehicle, and the Ks in the lateral (Y) direction is variable based on compression experienced by the pad members 104 positioned between the housing bracket and the body of the vehicle. The compressive force is shared when more number of pad members 104 are positioned between the housing bracket of the mounting member 102 and body of the vehicle. This effectively increases the Ks in the lateral (Y) direction.
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 spirit or scope of the present invention as defined.

We Claim:
1. An engine mount to increase static stiffness (Ks) in a lateral (Y) direction, comprising:
a mounting member that supports an engine of a vehicle; and one or more pad members positioned at one or more positions along body of the mounting member, wherein the pad members absorb vibrations that are generated on the mounting member during operation of the engine and increases the static stiffness (Ks) in the lateral (Y) direction.
2. The engine mount as claimed in claim 1, wherein the one or more pad members are positioned on an elastic arm, which is main rubber element, that is connected to the mounting member, and the pad members are moulded integrally with the elastic arm, in the lateral (Y) direction and comes in contact with one of a housing bracket and the body of the vehicle to increase the static stiffness (Ks) in the lateral (Y) direction.
3. The engine mount as claimed in claim 1, wherein value of the static stiffness (Ks) in the lateral (Y) direction is variable based on change in size of contact surface area of the one or more pad members with one of the elastic arm and the mounting member, and wherein adhesion free contact of the one or more pad members with one of the elastic arm and the mounting member increases durability of the mounting member.
4. The engine mount as claimed in claim 1, wherein value of the static stiffness (Ks) in the Y direction is variable based on positioning of the one or more pad members along the elastic arm, of the mounting member, and wherein the positioning includes positioning of the pad members above and below the elastic arm.
5. The engine mount as claimed in claim 1, wherein the one or more pad members are positioned within a clearance between a housing bracket of the mounting member and body of the vehicle, and wherein Ks in the lateral (Y) direction is variable based on amount of clearance between one of the housing bracket and the body of the vehicle, and the mounting member and the body of the vehicle.

6. The engine mount as claimed in claim 1, wherein the one or more pad members are positioned under compression between the housing bracket of the mounting member and body of the vehicle, and wherein the Ks in the lateral (Y) direction is variable based on compression experienced by the one or more pad members positioned between the housing bracket and the body of the vehicle.