FORM 2
THE PATENTS ACT 1970
(39 of 1970)
&
THE PATENTS RULES, 2003
COMPLETE SPECIFICATION (See Section 10; rule 13)
TITLE OF THE INVENTION Integrated Radiator with Auxiliary Tank
APPLICANTS
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
Mr. Nilesh Kulkarni, Mr. Hemant Rathi, Mr. Narayan Jadhav, Mr. Kamaljeet Nandkeolyar
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 and the manner in which it is to be performed.

FIELD OF INVENTION
The present invention relates to a radiator for automobiles and more particularly to an integrated radiator with auxiliary tank with a self de-aeration cooling system for vehicles to improve the cooling efficiency, avoid engine blockage failures due to cavitations and to eliminate the packaging issues in vehicles.
BACKGROUND OF INVENTION
New generation light commercial vehicles are designed for higher engine power and lower cabin floor height. For selecting the cooling system configuration for these vehicles, it creates constraint to package Positive de-aeration system which has certain performance advantages over non-deaerated system (with no loss tank). So there is requirement of a system which takes care of both packaging and performance needs of positive de-aerated system.
In existing heavy commercial vehicle the auxiliary tank is provided on the top of the radiator, in low commercial vehicles an auxiliary tank is provided behind cabin, in low commercial vehicle buses an auxiliary tank is provided behind driver. It is very difficult to package the radiator with auxiliary tank in buses, as it is to be kept behind the driver seat. In case of heavy commercial vehicles the vent lines run from front to rear of the cabin resulting in fouling improper routing issues. More over the auxiliary tank mounting bracket fail due to vibrations as auxiliary tank is located above radiator. With above systems the fill rate, de-aeration, draw down volume and expansion volume does not meet. More over due to air inside the cooling system it may lead to engine block failure due to cavitations resulting in bore skirt cracks, notch formation at bore core parting line and initiation of crack, crack at core cooler and the cooling efficiency is average. More over in conventional cooling system the water used to enter and air used to come from same area which was also causing problem to remove the air in the cooling system. Hence there is a

need for a system which takes cave of both packaging and performance needs of positive de-aerated system.
OBJECTS OF THE INVENTION
The primary object of the present invention is to provide an integrated radiator with auxiliary tank to eliminate the packaging issues in automobiles and to improve the cooling efficiency.
Another abject of the present invention to provide an integrated radiator with auxiliary tank and self de-aeration cooling system with plurality of vents to improve the engine life by avoiding engine block failures due to cavitations.
SUMMARY OF THE INVENTION
The embodiments herein provide an, integrated radiator with auxiliary tank comprising a radiator integrated beneath an auxiliary tank by a baffle. The integrated radiator with an auxiliary tank takes care of dimensional changes of water or coolant due to different temperature conditions. A plurality of vent line is provided in said auxiliary tank to remove air from upper water cooling line and/or said radiator. The vents open in expansion' volume of the auxiliary tank. A pressure cap is provided on said auxiliary tank to-fill water or coolant in to said auxiliary tank. The pressure cap is provided with a hole to remove the air from said expansion volume and said hole is provided above the water level of said auxiliary tank. The integrated radiator with auxiliary tank is provided to improve the cooling efficiency, improve engine life by avoiding engine blockage failures due to cavities, improve safety of drivers, low cost, and better pipe routing. The radiator with auxiliary tank eliminates the packaging issues and can be used in both trucks and bus.
According to present invention, when the water or coolant is filled by opening the

pressure cap the water/coolant flows from make-up line to radiator return line to fill said radiator from bottom to de-aerate.'said radiator. The auxiliary tank includes a plurality of vents which gives space for air to come from radiator bottom to radiator top and air flow out through vents. The plurality of vent lines running from said radiator and/or engine open in expansion volume of said auxiliary tank to de-aerate air in said radiator and/or engine. According to another embodiment, the plurality of vents start from bottom surface of said radiator and extends till said auxiliary tank to remove air from said radiator. The hole is provided in said pressure cap to avoid water form filling till said plurality of vent lines. The vent line extends above the level of hole provided on said pressure cap in said auxiliary tank. The hole provided in said pressure cap of said auxiliary tank to avoid the coolant form over flow, covering the vent tube resulting in blocking of air vents in said coolant.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 shows a schematic diagram showing fluid flow in Integrated Radiator with
Auxiliary Tank.
FIG. 2 shows a perspective view of the integrated radiator with auxiliary tank, according to present invention.
FIG. 3 shows a schematic diagram showing a vent positions in an integrated radiator with auxiliary tank, according to present invention, according to present invention.
FIG. 4 shows a perspective view of the auxiliary tank with vent positions, according to present invention.
DETAILED DESCRIPTION OF THE INVENTION
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.

An integrated radiator with an auxiliary tank is as shown in FIG. 1 to FIG. 4. The integrated radiator with an auxiliary tank comprises a radiator 1 integrated beneath an auxiliary tank 2 by a baffle 13. The integrated radiator 1 with an auxiliary tank 2 takes care of dimensional changes of water or coolant due to different temperature conditions in an expansion volume of said auxiliary tank. The volume from pressure cap till the coolant level is called expansion volume. A plurality of vent line 3, 4 is provided in said auxiliary tank 2 to remove air from upper water coolant line 11 of an engine 9 and/or said radiator 1. The vents 3, 4 open in expansion volume of the auxiliary tank 2 and escapes in to atmosphere. A pressure cap 5 is provided on said auxiliary tank 2 to fill water or coolant in to said auxiliary tank 2. The pressure cap 5 is provided with a hole 12 to remove the air from said expansion volume and said hole 12 is provided above the water level of said auxiliary tank 2. The integrated radiator with auxiliary tank is provided to improve the cooling efficiency, improve engine life by avoiding engine blockage failures due to cavities, improve safety of drivers, low cost, and better pipe routing. The radiator with auxiliary tank eliminates the packaging issues and can be used in both trucks and bus.
According to present invention, when the water or coolant is filled by opening the pressure cap 5 the water/coolant flows from make-up line 6 to radiator return line 7 to fill said radiator from bottom to de-aerate said radiator 1. The auxiliary tank 2 includes a plurality of vents 3 which gives space for air to come from radiator bottom to radiator top and air flow out through vents. The plurality of vent lines 3, 4 running from said radiator 1 and/or engine 9 open in expansion volume of said auxiliary tank 2 to de-aerate air in said radiator 1 and/or engine 9. According to another embodiment, the plurality of vents 3 start from bottom surface of said radiator 1 and extends till said auxiliary tank 2 to remove air from said radiator, as shown in FIG. 3. The hole 12 is provided in said pressure cap 5 to avoid water form filling till said plurality of vent lines 3.4. The vent line 3, 4 extends above the level of hole 12 provided on said pressure cap 12 in said auxiliary tank 2. The hole 12

provided in said pressure cap of said auxiliary tank 2 to avoid the coolant form over flow, covering the vent tube resulting in blocking of air vents in said coolant.
By providing an integrated radiator with auxiliary tank there is only a slight increase in the over all height of the radiator, hence packaging in both trucks and buses is very easy. More over, in existing low commercial vehicles with de-aerated system an auxiliary tank is mounted behind cabin vent line and coolant line flow below cabin rear end to front end. These lines are generally hanging only as they are placed above engine and clamping can not be done. Whereas in case of integrated tank with radiator according.to present invention the auxiliary tank is mounted exactly on top of radiator,- hence above problems does not occur. In present invention, the water or coolant enters the radiator region directly through the tube 14 and also trough the bypass line to fill the radiator from the bottom, hence removing the air from the bottom of the radiator.
ADVANTAGE:
• It improves cooling efficiency over existing cooling system design.
• Due to self deareated cooling system, it will improve engine life by avoiding engine block failures due to cavitations.
• It will be common design for both bus and truck applications.
• It will improve safety of Bus drivers in cases where auxiliary tank is mounted behind driver seat.
• It will also save cost over existing positive deareated system and non-deareated system.
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 integrated radiator with auxiliary tank, comprising:
a radiator (1) integrated beneath an auxiliary tank (2) by a baffle (13), said integrated radiator with an auxiliary tank takes care of dimensional changes due to different temperature conditions,
a plurality of vent line (3, 4) provided in said auxiliary tank to remove air from an upper water cooling line (11) and/or said radiator (1), said vents (3,4) open in expansion volume of the auxiliary tank;
a pressure cap (5) provided on said auxiliary tank (2) to fill water or coolant in to said auxiliary tank (2). said pressure cap (5) is provided with, a hole (12) to remove the air from said expansion volume, said hole is provided above the water level of said auxiliary tank (2).
2.The radiator with integrated auxiliary tank according to claim 1, wherein in said water/coolant flows from make-up line to radiator return line to fill said radiator from bottom to de-aerate said radiator.
3. The radiator with integrated auxiliary-tank according to claim 1, wherein said plurality of vents gives space for air to come from radiator bottom to radiator top and air flow out to atmosphere through hole in said pressure cap.
4. The radiator with integrated auxiliary tank according to claim 1, wherein said plurality of vent line running from said radiator (1) and/or engine (9) open in expansion volume of said auxiliary lank to deaerate air in said radiator and/or engine.
5. The radiator with integrated auxiliary tank according to claim 1, wherein said plurality of vents 3 extends from an baffle till above said expansion volume in said

auxiliary tank (2).
6. The radiator with integrated auxiliary tank according to claim 1, wherein said plurality of vents (3) start from bottom surface of said radiator bottom and extends till said auxiliary tank (2) to remove air from said radiator.
7. The radiator with integrated auxiliary tank according to claim 1, wherein said hole (12) is provided in said pressure cap (5) to avoid water form filling till said plurality of vent lines (3,4).
8. The radiator with integrated auxiliary tank according to claim 1, wherein said vent line extends above the level of hole provided on said pressure cap in said auxiliary tank,
9. The radiator with integrated auxiliary tank according to claim 1, wherein said plurality of vents 4 running from upper water cooling line 11 till said auxiliary tank to remove air in said engine 9.
10. The radiator with integrated auxiliary tank according to claim 1, wherein said
hole (12) provided in said pressure cap (5) of said auxiliary tank (2) to avoid the
coolant form over flow covering the vent tube resulting in blocking of air vents in
said coolant.