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FIELD OF INVENTION
This invention relates to a mounting arrangement for an exhaust
system of yehicle. It is a combination of engine mount and exhaust
mount.
BACKGROUND/PRIOR ART
Currently Engine is mounted to the chassis of vehicle using three
engine mounts (left, right and rear) and while the Exhaust system
is hanged to the chassis using an isolator (Rubber bush),which is
connected to the chassis using a bracket. Thus in the prior art, a
bracket system is used to mount the exhaust to the vehicle
underbody and a separate engine mounting bracket is used for
mounting engine. Now it will be described with reference to figure. 1
hereinbelow:
Exhaust Pipe (2) of the vehicle is connected to the Chassis (1) by a
rubber bush (5) inserted on a hanger (3) integrated with the
exhaust pipe, by means of a bracket (4) and the rubber bush (5)
combination wherein the bush and the bracket are connected by
means of a bolt and the bracket in turn is connected to the chassis
by means of bolts.
Alternatively, a hanger (not shown) is used to establish
connectivity between bush and bracket under the chassis. The
body bracket i.e. bracket under chassis is connected to the bush
by means' of a bolt (B) optionally using spacer (S) as illustrated in
fig.2.
Thus, the exhaust pipe requires separate provision in the body
(chassis) for its mounting. This gives rise to the following:
- More parts leading to complex exhaust layout
- More assembly time
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- More weight due to more number of parts and therefore high
cost.
As the exhaust system is in connected with the chassis therefore,
engine and body vibrations are likely to transfer to the cabin
causing noise inside the cabin. This adversely affects the NVH
(Noise Vibration Harness) characteristics of vehicle.
Another mounting arrangement for an exhaust system of vehicle is
conventionally known to have been available. This consists of
modification of body frame (chassis) for mounting of exhaust
system in which an exhaust isolator is directly mounted to a
vehicle's frame.
The above mounting arrangement causes more vibration thereby
adversely affecting NVH characteristics.
In view of the above, it is required to have a provision for mounting
of exhaust system, which can overcome the drawbacks of prior
arts.
OBJECTS OF THE INVENTION
Primary object of the present invention is to provide a mounting
arrangement for an exhaust system of vehicle which can obviate
shortcomings of conventionally known mounting arrangement (s).
Another object of the present invention is to provide a mounting
arrangement for an exhaust system of vehicle which provides
compact exhaust system mount employing optimum mounting
position.
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Still another object of the present invention is to provide a
mounting arrangement for an exhaust system of vehicle which
eases out assembly procedure.
Yet another object of the present invention is to provide a
mounting arrangement for an exhaust system of vehicle which
involves less number of parts leading to less weight, thereby
making it cost effective.
Yet further object of the present invention is to provide a mounting
arrangement for an exhaust system of vehicle which results in
improved NVH characteristics of vehicle.
SUMMARY OF THE INVENTION
According to this invention, there is provided a mounting
arrangement for an exhaust system of a vehicle comprising an
engine mount devised to accommodate isolator of the exhaust
system by combining said isolator with the engine mount.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
Further objects and advantages of this invention will be more
apparent from the ensuing description when read in conjunction
with the accompanying drawings of exemplary embodiments of
invention and wherein:
FIG. 1 shows: Conventional mounting arrangement for
an exhaust system of vehicle;
FIG. 2 shows: Exploded view of chassis bracket system
according to prior art;
FIG. 3 shows: Mounting of engine with the chassis of
vehicle;
FIG.4 A shows: Conventional mounting system;
FIG.4 B shows: Conventional engine mount;
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FIG. 5A shows: Mounting system according to present
invention;
FIG.5B shows: Engine mount of present invention;
FIG. 6 shows: Conventional exhaust system;
FIG.7 shows: Exhaust system in accordance with
present invention.
DETAIL DESCRIPTION OF THE INVENTION WITH REFERENCE
TO THE ACCOMPANYING DRAWINGS
The invention directing to a novel mounting arrangement of
exhaust system is a combination of engine mount isolator and
exhaust pipe isolator, which is compact as compared to
conventional mounting of exhaust system by eliminating many
child parts.'
As it is known engine (E) is mounted to the chassis (C) of vehicle by
means of a plurality of engine mounts (M) according to the
requirement as shown in fig. 3. The connectivity between engine
mount and engine is established through bracket (Bi) as in fig.4A
and4B.
In order to avoid separate mounting for exhaust system, the engine
mount is devised to accommodate the isolator of the exhaust
system by combining said isolator with the engine mount.
The engine, mount is preferably rear mount as it is nearest to the
exhaust system and also because selection of other engine mounts
will cause interference with various parts of vehicle.
Now reference may be made to fig. 4A and 4B.
Side member (R) of engine mount (M) having elastic mounting
point (P), which is mounting point of engine with the mount (M)
through a bracket (Bi).
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The side member (R) is modified by extending its one side (Si)to
create space for accommodating the isolator of exhaust system,
which is generally made of resilient material such as rubber
without restricting its scope to the same. The modified side
member (Ri) is substantially rectangular as illustrated in fig.5A
and 5B. The side member (Ri) is incorporated with isolator of the
exhaust pipe (I) which can also be called rubber bush. The bush is
of the required stiffness provided in the engine mount (Mi).
The bush is having only one hole (H) instead of two as in prior art
for connecting hanger of exhaust pipe with empty space (E)
adjacent to the hole in the longitudinal direction facilitating
movement of the hanger.
Purpose of the empty space in bush
- Facilitates side movement of hanger in dynamic condition of
vehicle;
- Providing tolerance in the part fitment (Hanger Fitment);
- Prevents transfer of vibration to the connected parts.
The rubber bush with the required stiffness is press fitted in the
engine mount itself thus making the hanging mechanism of the
exhaust pipe simpler and compact.
Thus, with the provision of novel mounting arrangement for an
exhaust system of invention, some child parts are eliminated
leading to weight saving. Further, due to elimination of the
bracket, the location has become more compact which can be
observed by comparison of fig. 7 with fig. 6.
Advantageous Features
- Compact exhaust system mount using optimum mounting
positions
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- Easing out of the assembly procedure
- Less weight, therefore cost effective
- Improved NVH characteristics of vehicle.
- Vibration due to exhaust system is absorbed by the enginemount's
structure itself thereby reducing the vibration to the
cabin.
It is to be noted that the present invention is susceptible to
modifications, adaptations and changes by those skilled in the art.
Such variant embodiments employing the concepts and features of
this invention are intended to be within the scope of the present
invention, which is further set forth under the following claims:-

1. A mounting arrangement for an exhaust system of a vehicle
comprising an engine mount devised to accommodate the
isolator of the exhaust system by combining said isolator
with the engine mount.
2. A mounting arrangement for an exhaust system of a vehicle
as claimed in claim 1, wherein the engine mount, side
member of which having elastic mounting point of engine is
modified.
3. A mounting arrangement for an exhaust system of a vehicle
as claimed in claim 1 or 2, wherein the modified side
member of said engine mount comprising an extended side
to incorporate the isolator of exhaust system therein.
4. A mounting arrangement for an exhaust system of a vehicle
as claimed in any of the preceding claims, wherein the
isolator constituting a bush of required stiffness is preferably
made of resilient material such as rubber.
5. A mounting arrangement for an exhaust system of a vehicle
as claimed in any of the preceding claims, wherein the bush
is having atleast one hole for connecting hanger of exhaust
pipe with empty space adjacent to the hole in the
longitudinal direction.
6. A mounting arrangement for an exhaust system of a vehicle
as claimed in any of the preceding claims is associated with
the advantageous features such as herein described.
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7. A mounting arrangement for an exhaust system of a vehicle
substantially as herein described with reference to the
accompanying drawings.
Dated this 27t h day of August, 2014
(SOMA RANIiarSHRA)
OF L.S.DAVAR & CO.,
APPLICANT'S AGENT