FORM 2
THE PATENTS ACT 1970
(39 of 1970)
&
THE PATENTS RULES, 2003
COMPLETE SPECIFICATION
(See Section 10; rule 13)
TITLE OF THE INVENTION
Unique designed resilient mounting brackets & arrangement for heavy duty
power packs for HCV applications
APPLICANT
TATA MOTORS LIMITED, an Indian company
Having its registered office at Bombay House,
24 Homi Mody Street, Hutatma Chowk,
Mumbai 400 001 Maharashtra, India
INVENTORS
Ashwanin Garg, Satish Kakade, Shailesh Vishwakarma
All are Indian nationals
of TATA MOTORS LIMITED,
an Indian company having its registered office
at Bombay House, 24 Homi Mody Street, Hutatma Chowk,
Mumbai 400 001 Maharashtra, India
PREAMBLE TO THE DESCRIPTION The following specification particularly describes the invention

FIELD OF INVENTION
The present invention is related to engine suspension for Heavy Commercial Vehicles and more particularly it relates to improvement in lateral arm mounting design and mounting arrangement for heavy duty power packs having inherent lateral vibrations, particularly intended for the purpose of supporting in a chassis frame of vehicle.
BACKGROUND OF THE INVENTION
Engine in Heavy Commercial Vehicles are very heavy and provide high power. As the engines are very heavy duty engine and usually diesel driven the mountings has to be such that they can take care of load, vibration, torque transmission and resistance to rolling motion. Moreover in Indian road conditions these requirements become more challenging, which is not available in the present day solutions. Existing mounting brackets and arrangements are not resilient to handle the challenges in worst road conditions.
OBJECT OF INVENTION
The main object of the present invention is to provide a strong mounting arrangement for the heavy duty powerpacks for heavy commercial vehicles
Another object of the present invention is to provide strong lateral arms for a heavy power packs with high power and torque transmission capacity to provide resistance to the rolling motion and vibrations of the powerpack
Another object of the present invention is to provide powerpack mounting arrangement with enough bending strength for off-road application as well

Another object of the present invention is to provide mounting structure for a Heavy Commercial vehicle which is simple in construction, cost effective.
SUMMARY OF PRESENT INVENTION:
In accordance with this invention, The power pack mounting arrangement comprises;
In an power pack mounting arrangement, an powerpack comprises heavy duty engine (5) and heavy duty transmission (7), a frame (4), a pair of powerpack mount assemblies resiliently supporting said powerpack at opposite sides of the said fame, each said powerpack mount assembly including an lateral arm secured to one side of said engine, a frame bracket secured to said frame (4) opposite said lateral arm, said lateral arm having an extension from said powerpack toward said frame, said frame bracket having an arm extending from said frame beside said lateral arm toward said engine, a link and a pair of pivot means resiliency pivotally connecting said link at opposite ends to said bracket arms with the pivot connection to said engine bracket arm located closer to said frame so said engine and the pivot connection, said engine and said frame so that said links do not swing substantially when said engine moves either vertically or longitudinally relative to said frame and do swing substantially when said powerpack rolls relative to said frame.
BRIEF DESCRIPTION:
Figure 1 shows the front view of power pack mounting Figure 2 shows the isometric view of front powerpack mounting. Figure 3 shows the isometric view of rear powerpack mounting. Figure 4 shows the side view of power pack mounting Figure 5 shows the top view of power pack mounting Figure 6 shows the isometric view of power pack mounting

DEATILED DESCRIPTION OF THE INVENTION
In the given concept, heavy duty power packs comprise of internal combustion heavy duty engine & heavy duty transmission mounted on 4 points. Wherein powerpack is permitted to roll about a longitudinal extending axis with little restraints while vertical movement with respect to the chassis or the like is damped strongly as compared with the damping of the rolling motion. Pair of mount assemblies each including a link that resiliency supports power-pack at opposite sides on a vehicle frame so that the links do not swing substantially when the power-pack moves longitudinally or vertically relative to the frame.
Mounting arrangement includes elastomeric mounting blocks interposed between laterally extending arms connected to the engine & transmission. Brackets are fixed to the long members of the chassis near the outboard ends thereof. The blocks are adapted to undergo shear upon the engine rolling about an essentially longitudinal axis.
To take care of the heavy load, vibrations, rocking, balancing & bending movement of the power pack, optimized & new unique design of the mounting brackets / laterally extending arms have been done.
Referring now to the drawings wherein the showings are for the purpose of illustrating a preferred embodiment of the invention only, and not for the purpose of limiting the same.
Now referring to the figure-01-05, in accordance with this invention, The powerpack mounting structure comprises;
Complete power pack consist of heavy duty engine (5) & heavy duty gearbox (7), said power pack is mounted on front mounting pair & rear mounting pair. Lateral arm, at least two lateral arms (1) extended from the engine (5) towards the fame (4)

& connected to the resilient elastomeric mount (2) with the help of bolt & nut assy (6) which in turn mounted on the frame mounted bracket (3). Said Engine is mounted on a pair of front engine mounting assy.
Transmission (7) has a pair of supporting arms (8) fixed there to which extend laterally thereof. A pair of elastomeric mounting blocks (10) is fixed between the frame mounted bracket (9) as shown. At ends of the arms and serve to connect same to mounting brackets connected to frame (4) near the outboard end thereof.
Both front & rear mounting pairs hold said powerpack and the pivot connection, said powerpack and said frame so that said links do not swing substantially when said engine moves either vertically or longitudinally relative to said frame and do swing substantially when said powerpack rolls relative to said frame,
In one embodiment a front mounting assy, Laterally extended arm (1) secured to the engine (5), has holes to mount on engine, thereof fastened through the bolts. pair of engine laterally extended arm (1) resiliently supporting said engine (5) at opposite sides of the said fame (4), each said powerpack mount assembly including an lateral arm secured to one side of said engine, a frame bracket secured to said frame (4) opposite said lateral arm, said lateral arm having an extension from said engine toward said frame (4), said frame bracket (3) having an arm extending from said frame beside said lateral arm toward said engine, a link and a pair of pivot means resiliently pivotally connecting said link at opposite ends to said bracket arms with the pivot connection to said engine bracket arm located closer to said frame so said engine and the pivot connection, said engine and said frame so that said links do not swing substantially when said engine moves either vertically or longitudinally relative to said frame and do swing substantially when said engine rolls relative to said frame.

In another embodiment a pair of rear mounting assy on transmission (7) housing , Laterally extended arm (8) secured to the heavy duty transmission (7), thereof fastened through the bolts, pair of engine laterally extended arm (8) resiliency supporting said transmission (7) at opposite sides of the said fame (4), each said powerpack mount assembly including an lateral arm secured to one side of said engine, a frame bracket (9) secured to said frame (4) opposite said lateral arm, said lateral arm having an extension from said transmission (7) toward said frame (4), said frame bracket (9) having an arm extending from said frame beside said lateral arm toward said engine, a link and a pair of pivot means resiliency pivotally connecting said link at opposite ends to said bracket arms with the pivot connection to said engine bracket arm located closer to said frame so said powerpack and the pivot connection, said transmission and said frame so that said links do not swing substantially when said engine moves either vertically or longitudinally relative to said frame and do swing substantially when said transmission rolls relative to said frame,
In yet another embodiment laterally extended arm (1) has the reinforced localized ribs structure to withstand more stresses & vibrations of heavy duty powerpack, it's unique shape thereof. A pair of rear mounting assy (8) mounted on the transmission (7) drastically increase the bending strength of complete powerpack assy which comprises of heavy duty engine (5) & heavy duty transmission (7) for the off road application.
The foregoing description is a specific embodiment of the present invention. It should be appreciated that this embodiment is described for purpose of illustration only, and that numerous alterations and modifications may be practiced by those skilled in the art without departing from the spirit and scope of the invention. It is intended that all such modifications and alterations be included insofar as they come within the scope of the invention as claimed or the equivalents thereof.

We Claim:
1. An Unique designed resilient mounting brackets & arrangement for heavy duty power packs for HCV applications comprising heavy duty engine (5) and heavy duty transmission (7), a frame (4), a pair of powerpack mount assemblies resiliency supporting said powerpack at opposite sides of the said fame, each said powerpack mount assembly including an lateral arm secured to one side of said engine, a frame bracket secured to said frame (4) opposite said lateral arm, said lateral arm having an extension from said powerpack toward said frame, said frame bracket having an arm extending from said frame beside said lateral arm toward said engine, a link and a pair of pivot means resiliency pivotally connecting said link at opposite ends to said bracket arms with the pivot connection to said engine bracket arm located closer to said frame so said engine and the pivot connection, said engine and said frame so that said links do not swing substantially when said engine moves either vertically or longitudinally relative to said frame and do swing substantially when said powerpack rolls relative to said frame.
2. The system as claimed in claim 1, wherein said mounting arrangement includes elastomeric mounting blocks interposed between laterally extending arms connected to the engine & transmission.
3. The system as claimed in claim 1, wherein said brackets are fixed to the long members of the chassis near the outboard ends thereof.
4. The system as claimed in claim 1, wherein said blocks are adapted to undergo shear upon the engine rolling about an essentially longitudinal axis.

5. The system as claimed in claim 1, wherein said heavy duty power packs comprise of engine and transmission mounted on 4 points.
6. The system as claimed in claim 1, wherein transmission (7) has a pair of supporting arms (8) fixed there to which extend laterally thereof.
7. The system as claimed in claim 1, wherein elastomeric mounting blocks (10) is fixed between the frame mounted bracket (9).
8. The system as claimed in claim 1, wherein laterally extended arm (1) has the reinforced localized ribs having an unique shape and structure to withstand more stresses & vibrations of heavy duty powerpack.
9. The system as claimed in claim 1, wherein said powerpack mounting structure comprises heavy duty engine (5), heavy duty gearbox (7), said power pack is mounted on front mounting pair and rear mounting pair, at least two lateral arms (1) extended from the engine (5) towards the fame (4) and connected to the resilient elastomeric mount (2) with the help of bolt and nut assy (6) which in turn mounted on the frame mounted bracket (3), said Engine is mounted on a pair of front engine mounting assembly with resilient mounting brackets.