The present subject matter described herein relates to a rear engine mount bracket structure. In particular, the present subject matter relates to reducing the transfer of vibrations coming from the engine at the rear portion to vehicle body by using the rear engine mount bracket structure.
BACKGROUND
[0002] Generally, in a vehicle, a powertrain is connected to a transmission unit, where the transmission unit is further connected to an engine. In vehicle having engine at underbody of the vehicle, the engine is mounted on underside of a vehicle body using three mounts. Two mounts are located on the long members at the front side and the third mount is located on the cross member at the rear side.
[0003] The mounts are connected to the engine as well as the cross member. These mounts act as a path from which the vibration can transfer to the vehicle body. Therefore, it is important to ensure that the vibration performance of these mounts be ensured to optimal levels. In case if the vibration is high at these points or the mounting points, the comfort of the passenger is compromised. Moreover, due to the presence of vibrations, there are chances that the noise enters inside the cabin due to high amplitude of resonance.
[0004] In the existing design, the bracket is welded to a cross member and has rectangular shaped flanges that are given in the front of the bracket. The connection is made at the bottom of the bracket where the bracket is welded to the cross member. The vibrations coming from the engine enter into the vehicle body through the bracket. The vibration performance is evaluated at the center point of the bracket. The vibration performance determines the amount of vibrations that enter in the vehicle body.

[0005] The technical issues present with the existing state of art is that the vibration levels coming from the engine are high. Moreover, due to high vibrations and stress there are chances of bracket deformation.
[0006] Therefore, in order to improve the vibration performance arising on the engine mount, following type of countermeasures are used as a standard practice. Out of some of the countermeasures, few are listed below such as adding a mass damper. The disadvantage of using a mass damper is that weight tuning trials are required and there are also concerns regarding its durability.
[0007] Another countermeasure can be increasing the thickness of a mounting bracket. But the increase in thickness would lead in increasing of weight further leading to additional costs or a reinforcement plate is added but that also increases weight and cost.
[0008] Therefore, it is required to reduce the vibrations that enter the vehicle body from the engine and improve the lateral deformation of the bracket mounted on the cross member.
OBJECTS OF THE DISCLOSURE
[0009] It forms an object of the present disclosure to overcome the aforementioned and other drawbacks/limitations in the existing solutions available in the form of related prior arts.
[0010] It is a primary object of the present disclosure to provide a mounting bracket to improve the engine mount vibration performance.
[0011] It is another object of the present disclosure to provide a cost effective way of dampening the engine vibrations.
[0012] It is yet another object of the present disclosure to increase the stiffness of the bracket to provide more support to the mounting structure.
[0013] These and other objects and advantages of the present subject matter will be apparent to a person skilled in the art after consideration of the following

detailed description taken into consideration with accompanying drawings in which preferred embodiments of the present subject matter are illustrated.
SUMMARY
[0014] A solution to one or more drawbacks of existing technology and additional advantages are provided through the present disclosure. Additional features and advantages are realized through the technicalities of the present disclosure. Other embodiments and aspects of the disclosure are described in detail herein and are considered to be a part of the claimed disclosure.
[0015] The present disclosure provides a solution in the form of a rear engine mount bracket structure for connecting an engine to a cross-member of a vehicle. The bracket includes side portions having front flanges and rear flanges wherein the front flanges and the rear flanges have a front facing side and a back facing side, rods whose ends are attached to the front facing side of the rear flanges and the back facing side of the front flanges, a middle portion situated in between the side portions, wherein a bottom side of the middle portion is connected to the cross-member.
[0016] In an aspect, the structure further comprises of a plurality of embossed beads provided on portions located in between the front flanges and the rear flanges of each of the side portions.
[0017] In an aspect, holes are given on the surface of the front flanges and the rear flanges to insert the rods.
[0018] In an aspect, each of the front flange and the rear flange has a quadrilateral shape.
[0019] In an aspect, the front flanges and the rear flanges are parallel to each other.
[0020] In an aspect, the side portions are parallel to each other.

[0021] In an aspect, the widths of the front flanges and the rear flanges increases along their height.
[0022] In an aspect, the middle portion is perpendicular to the side portions.
[0023] In an aspect, the middle portion comprises a mounting hole to mount the engine.
[0024] The foregoing summary is illustrative only and is not intended to be in any way limiting. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features will become apparent by reference to the drawings and the following detailed description.
BRIEF DESCRIPTION OF ACCOMPANYING DRAWINGS
[0025] It is to be noted, however, that the appended drawings illustrate only typical embodiments of the present subject matter and are therefore not to be considered for limiting of its scope, for the present disclosure may admit to other equally effective embodiments. The detailed description is described with reference to the accompanying figures. In the figures, a reference number identifies the figure in which the reference number first appears. The same numbers are used throughout the figures to reference like features and components. Some embodiments of system or methods or structure in accordance with embodiments of the present subject matter are now described, by way of example, and with reference to the accompanying figures, in which:
[0026] Fig. 1 illustrates a rear engine mount bracket structure joined to cross-member according to the present disclosure;
[0027] Fig. 2 is a rear view of a rear engine mount bracket structure according to the present disclosure;
[0028] Fig. 3 illustrates side view of the rear engine mount bracket structure according to the present disclosure;

[0029] Fig. 4 illustrates an isometric view of the rear engine mount bracket structure according to the present disclosure;
[0030] Fig. 5 illustrates a front view of the rear engine mount bracket structure according to the present disclosure;
[0031] Fig. 6 illustrates a comparison graph between the prior art and the present disclosure.
[0032] The figures depict embodiments of the present subject matter for illustration only. A person skilled in the art will easily recognize from the following description that alternative embodiments of the structures and methods illustrated herein may be employed without departing from the principles of the disclosure described herein.
DETAILED DESCRIPTION OF INVENTION
[0033] The detailed description of various exemplary embodiments of the disclosure is described herein with reference to the accompanying drawings. It should be noted that the embodiments are described herein in such details as to communicate the disclosure. However, the amount of details provided herein is not intended to limit the anticipated variations of embodiments; on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the present disclosure as defined by the appended claims.
[0034] It is also to be understood that various arrangements may be devised that, although not explicitly described or shown herein, embody the principles of the present disclosure. Moreover, all statements herein reciting principles, aspects, and embodiments of the present disclosure, as well as specific examples, are intended to encompass equivalents thereof.
[0035] It should also be noted that in some alternative implementations, the functions/acts noted may occur out of the order noted in the figures. For example, two figures shown in succession may be executed concurrently or may sometimes be executed in the reverse order, depending upon the functionality/acts involved.

[0036] 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 example embodiments belong. It will be further understood that terms, e.g., 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.
[0037] In the following detailed description of the embodiments of the disclosure, reference is made to the accompanying drawings that form a part hereof, and in which are shown by way of illustration specific embodiments in which the disclosure may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the disclosure, and it is to be understood that other embodiments may be utilized and that changes may be made without departing from the scope of the present disclosure. The following description is, therefore, not to be taken in a limiting sense.
[0038] Hereinafter, a description of an embodiment with several components in communication with each other does not imply that all such components are required. On the contrary, a variety of optional components are described to illustrate the wide variety of possible embodiments of the present disclosure.
[0039] The present invention discloses about a rear engine mount bracket structure that connects the engine to the cross member of the vehicle body. The rear engine mount bracket structure reduces the vibrations that enters the body through an engine thereby improving the vibration performance.
[0040] Referring to FIGS. 2-4, a rear engine mount bracket structure (200) is provided on underside of a vehicle. The rear engine mount bracket structure (200) is welded to the cross member (102) at the rear side. The rear engine mount bracket structure (200) has three parts - two side portions (201a, 201b) and a middle portion (202), front flanges (203a, 203b), and rear flanges (204a,204b) are provided on both the side portions (201a, 201b).

[0041] The front flanges (203a, 203b) and the rear flanges (204a, 204b) has front facing sides (401) and back facing sides (402) respectively (as shown in FIG. 4). Multiple holes (205a, 205b) are provided on the front flanges (203a, 203b) and the rear flanges (204a, 204b) to connect rods (301a, 301b). Embossed beads (302a, 302b) are provided vertically on portions (303a, 303b) of the side portions (201a, 201b). The surfaces (206a, 206b) connects the front flanges (203a, 203b) and the rear flanges (204a, 204b). A middle portion (202) is provided in between the side portions (201a, 201b).
[0042] The front flanges (203a, 203b) and the rear flanges (204a, 204b) have a quadrilateral shape. Therefore, the area gradually increases from top to bottom of the flanges (203, 204). The larger area is located at the bottom and is adjoined to the cross member (102). Due to the larger area at the bottom, the area for welding also increases. This helps in increasing the stiffness of the rear engine mount bracket structure (200) that leads to improved vibration performance.
[0043] Further, the surfaces (206a, 206b) provided on top of the rear engine mount bracket structure (200) curvedly joins the front flange (203a, 203b) with the rear flange (204a, 204b) thereby forming side portions (201a, 201b). The surfaces (206a, 206b) have mounting holes (207a, 207b) provided in the middle for mounting or fastening the engine (not shown in figs.).
[0044] The front flanges (203a, 203b) and the rear flanges (204a, 204b) have the holes (205a, 205b) on their surface to intake the solid rods (301a, 301b). The rods (301a, 301b) are inserted in the holes (205a, 205b) that are located on the back facing side (402) and the front facing side (401) of the side portions (201a, 201b). The rods (301a, 301b) are arc welded in the holes (205a, 205b) to further increase stiffness of the rear engine mount bracket structure (200) against deformation.
[0045] Further, the middle portion (202) is provided in between the side portions (201a, 201b). Moreover, the middle portion (202) is located perpendicularly to the side portions (201a, 201b).

[0046] Referring back to FIG. 3, it shows the side portion (201b) of the rear engine mount bracket structure (200). The portion (303b) of the side portion (201b) has the embossed bead (302b). The embossed bead (302b) has a rectangular shape and is positioned longitudinally on the side portion (201b) of the rear engine mount bracket structure (200).
[0047] The embossed bead (302b) extends linearly in vertical direction through the side portion (201b). The purpose of the embossed bead (302b) is to increase the lateral stiffness of the rear engine mount bracket structure (200). Further, the embossed bead (302b) aids in reducing the lateral deformation of the rear engine mount bracket structure (200) along the axis of the cross member (102).
[0048] The same structure is provided on the side portion (201a) as well.
[0049] Referring to FIG. 4, it shows the side portion (201b) of the rear engine mount bracket structure (200). The rear engine mount bracket structure (200) has the side portions (201a, 201b) and the middle portion (202). The side portion (201b) have the front flange (203b) and the rear flange (204b) and these flanges (203b, 204b) bear the quadrilateral shape and are positioned parallel to each other. The front flange (203b) is parallel to the rear flange (204b). The side portion (201a) also has the front flange (203a) and the rear flange (204a) with quadrilateral shape similar to the side portion (201b). The front flange (203a) is parallel to the rear flange (204a).
[0050] Due to the quadrilateral shape of the rear flanges (204a, 204b), the area on the bottom part has the highest width. The bottom part of the rear flanges (204a, 204b) is arc welded to the cross member (102). Due to this quadrilateral shape, the span or the area of the weld between the rear engine mount bracket structure (200) and the cross member (102) increases.
[0051] With the increase of the weld area, the rear engine mount bracket structure (200) is supported evenly on the cross member (102) and thereby the vibrational load induced by the engine are absorbed and distributed to the rear flanges (204a,

204b). This helps in reducing the vibrations on the rear engine mount bracket structure (200).
[0052] Further, each of the front flanges (203a, 203b) and the rear flanges (204a, 204b) on the side portions (201a, 201b) has holes (205a, 205b). The holes (205a, 205b) are provided for inserting the rods (301a, 301b). The rods (301a, 301b) connect the front flanges (203a, 203b) and the rear flanges (204a, 204b). Basically, the arc welding is done between the rods (301a, 301b) and the flanges (203a, 203b, 204a, 204b) for connection purpose. Due to the weld connection and the presence of the rods (301a, 301b) to join the front flanges (203a, 203b) and the rear flange (204a, 204b), it allows for transferring of the vibrational load from the engine to the rods (301, 301b) and also with the use of arc weld, the longitudinal deformation of the rear engine mount bracket structure (200) reduces.
[0053] Furthermore, the front flanges (203a, 203b) and the rear flanges (204a, 204b) are adjoined together by means of the surfaces (206a, 206b). The ends of the surfaces (206a, 206b) curvedly join and merges into the front flanges (203a, 203b) and the rear flanges (204a, 204b). The surfaces (206a, 206b) also have the mounting holes (207a, 207b) to mount the engine.
[0054] The middle portion (202) is situated in between the side portions (201a, 201b). The middle portion (202) is slightly inclined and is connected to the cross member (102) from its bottom side.
[0055] Referring to FIG. 5, it shows the front flanges (203a, 203b) that are arc welded to the cross member (102) of the vehicle body. The front flanges (203a, 203b) are having the quadrilateral shape where the larger side is located at the bottom that is connected to the cross member (102). The front flanges (203a, 203b) are provided on both the side portions (201a, 201b). The front flanges (203a, 203b) have the holes (205a, 205b) located on its surface to accommodate the rods (301a, 301b).
[0056] The area of the front flanges (203a, 203b) is larger at the bottom that is connected to the cross member (102). The area is larger in order to give more

weld area for better support. Moreover, due to the shape of the front flanges (203a, 203b) the arc weld length is expanded with cross member (102) which further adds to the stiffness of rear engine mount bracket structure (200) and therefore the transfer of vibrations from engine to vehicle body are reduced.
[0057] Ref to FIG.6, the graph indicates the rear engine mount bracket structure (200) performance. Thus, the comparison between the vibration performance against a range of frequencies for the existing design of bracket structure and the inventive design of bracket structure (200) is shown. The graph shows that the vibrations in the inventive design of the bracket structure (200) is less than that in the existing design of the bracket structure indicating better vibration performance in the inventive design of the bracket structure (200).
TECHNICAL ADVANTAGES
[0058] With the help of the solution as proposed herein in the context of the present disclosure, the vibration levels are getting decreased.
[0059] The object of the present disclosure is able to meet the vibration performance requirement without increasing the thickness of the mounting bracket structure.
[0060] With the help of the present disclosure, the deformation of the mounting bracket structure and cross member is reduced.
[0061] With the help of the present disclosure, the comfort inside the cabin is increased.
[0062] It will be understood by those within the art that, in general, terms used herein, and especially in the appended claims (e.g., bodies of the appended claims) are generally intended as "open" terms (e.g., the term "including" should be interpreted as "including but not limited to," the term "having" should be interpreted as "having at least," the term "includes" should be interpreted as "includes but is not limited to," etc.). It will be further understood by those within

the art that if a specific number of an introduced claim recitation is intended, such an intent will be explicitly recited in the claim, and in the absence of such recitation, no such intent is present. For example, as an aid to understanding, the following appended claims may contain usage of the introductory phrases "at least one" and "one or more" to introduce claim recitations. However, the use of such phrases should not be construed to imply that the introduction of a claim recitation by the indefinite articles "a" or "an" limits any particular claim containing such introduced claim recitation to disclosures containing only one such recitation, even when the same claim includes the introductory phrases "one or more" or "at least one" and indefinite articles such as "a" or "an" (e.g., "a" and/or "an" should typically be interpreted to mean "at least one" or "one or more"); the same holds true for the use of definite articles used to introduce claim recitations. Also, even if a specific number of an introduced claim recitation is explicitly recited, those skilled in the art will recognize that such recitation should typically be interpreted to mean at least the recited number (e.g., the bare recitation of "two recitations," without other modifiers, typically means at least two recitations or two or more recitations). Furthermore, in those instances where a convention analogous to "at least one of A, B, and C, etc." is used, in general, such construction is intended in the sense one having skill in the art would understand the convention (e.g., "a system having at least one of A, B, and C" would include but not be limited to systems that have A alone, B alone, C alone, A and B together, A and C together, B and C together, and/or A, B, and C together, etc.). In those instances, where a convention analogous to "at least one of A, B, or C, etc." is used, in general, such construction is intended in the sense one having skill in the art would understand the convention (e.g., "a system having at least one of A, B, or C" would include but not be limited to systems that have A alone, B alone, C alone, A and B together, A and C together, B and C together, and/or A, B, and C together, etc.). It will be further understood by those within the art that virtually any disjunctive word and/or phrase presenting two or more alternative terms, whether in the description, claims, or drawings, should be understood to contemplate the possibilities of including one of the terms, either of the terms or both terms. For

example, the phrase "A or B" will be understood to include the possibilities of "A" or "B" or "A and B."
[0063] It will be further appreciated that functions or structures of a plurality of components or steps may be combined into a single component or step, or the functions or structures of one-step or component may be split among plural steps or components. The present disclosure contemplates all of these combinations. Unless stated otherwise, dimensions and geometries of the various structures depicted herein are not intended to be restrictive of the disclosure, and other dimensions or geometries are possible. Also, while a feature of the present disclosure may have been described in the context of only one of the illustrated embodiments, such feature may be combined with one or more other features of other embodiments, for any given application. It will also be appreciated from the above that the fabrication of the unique structures herein and the operation thereof also constitute methods in accordance with the present disclosure. The present disclosure also encompasses intermediate and end products resulting from the practice of the methods herein. The use of "comprising" or "including" also contemplates embodiments that "consist essentially of or "consist of the recited feature.

we claim:

1. A rear engine mount bracket structure (200) for connecting an engine to a
cross-member (102) of a vehicle, the rear engine mount bracket structure
(200) comprising:
a plurality of side portions (201a, 201b) having front flanges (203a, 203b) and rear flanges (204a, 204b), wherein the front flanges (203a, 203b) and the rear flanges (204a, 204b) have a front facing side (401) and a back facing side (402);
a plurality of rods (301a, 301b), wherein ends of the rods (301a, 301b) are attached to the front facing side (401) of the rear flanges (204a, 204b) and the back facing side (402) of the front flanges (203a, 203b); and
a middle portion (202) situated in between the side portions (201a, 201b), wherein a bottom side of the middle portion (202) is connected to the cross-member (102).
2. The structure (200) as claimed in claim 1, further comprising a plurality of embossed beads (302a, 302b) provided on portions (303a, 303b) located in between the front flanges (203a, 203b) and the rear flanges (204a, 204b) of each of the side portions (201a, 201b).
3. The structure (200) as claimed in claim 1, wherein holes (205a, 205b) are provided on the surface of the front flanges (203a, 203b) and the rear flanges (204a, 204b) to insert the rods (301a, 301b).
4. The structure (200) as claimed in claim 1, wherein each of the front flange (203a, 203b) and the rear flange (204a, 204b) has a quadrilateral shape.
5. The structure (200) as claimed in claim 1, wherein the front flanges (203a, 203b) and the rear flanges (204a, 204b) are parallel to each other.
6. The structure (200) as claimed in claim 5, wherein the side portions (201a, 201b) are parallel to each other.
7. The structure (200) as claimed in claim 1, wherein widths of the front flanges (203a, 203b) and the rear flanges (204a, 204b) increases along their height.

8. The structure (200) as claimed in claim 1, wherein the middle portion (202) is perpendicular to the side portions (201a, 201b).