FORM 2
THE PATENT ACT 1970
&
The Patents Rules, 2003
PROVISIONAL / COMPLETE SPECIFICATION
(See section 10 and rule 13)
1. TITLE OF THE INVENTION:
"Baffle in radiator inlet tank of engine cooling system'
2. APPLICANT

(a) NAME:
(b) NATIONALITY:
(c) ADDRESS:
TATA TOYO Radiator Ltd
Indian Company registered under the provisions of The Companies Act, 1956
Survey No. 235/245, Village Hinjewadi, Taluka Mulshi, Dist. Pune 411 027, M.S. India
PROVISIONAL
The following specification describes the invention.
3. PRREAMBLE TO THE DESCRIPTION
COMPLETE
The following specificatipir particularly describes the invention and the majjnefin which it is to be rformed.

Technical field:
The present invention is related to an implementation of baffle in radiator inlet tank of engine cooling system (ECS herein after) of commercial vehicle and generator set application for de-aeration purpose.
Background & Prior art:
In contemporary and earlier radiator assembly, separate de-aeration tank (DAT herein after) were been used. As shown in figure 1, a prime function of DAT (2) is to remove the air bubbles from radiator coolant to atmosphere and also has an auxiliary function to maintain the level of coolant in radiator . These entrapped air bubbles accumulate inside radiator inlet tank (1) and then move out to atmosphere via passing through vent pipe (13), DAT (2) and finally the filler neck (12) by means of pressure valve opening. Inside DAT construction, its total volume segregated between expansion volume & coolant holding volume. Due to heating of liquid coolant, it converts into steam or vapour form. As steam or vapour occupies more volume and lesser dense than coolant it tries to escape from the radiator, it flows out of the radiator inlet tank (1) to DAT(2) via passing through the vent pipe (13). While system is cooled down, earlier formed steam or vapour gets converted into liquid so that density variation, inside system vacuum is developed. Therefore exhausted coolant is returning back into the radiator inlet tank (1). Thus the coolant level is maintained to sufficient level inside radiator inlet tank (1). After designed working cycle, radiator coolant is lost due to evaporation. Therefore user has to refill the coolant into radiator system from filler neck which is fitted on DAT. This DAT is manufactured with metal or plastic material.

Drawbacks in Prior art:
1. More envelop space occupancy due to additional assembly of DAT.
2. Addition of DAT cost in ECS cost.
3. Higher manufacturing cost and process.
Objects of the present invention:
The main object of the present invention is to integrate the baffle into radiator inlet tank to compensate the function of additional DAT and its accessories such as vent tube, clamps, fill hose and eliminate them from assembly.
Another object of the present invention is to save or reduce the manufacturing and material cost by introducing baffle in tank.
Yet another object of the present invention is to lower the weight of ECS and increase the aesthetic appearance of ECS.
Brief Description of the Drawings:
Figure 1 shows the partial view oi radiator tank with DAT. Figure 2 shows the partial view of radiator tank with baffle. Figure 3 shows zoomed in view of baffle implementation. Figure 4 shows the constructional details of vent tube
Detailed Description of Invention:
As shown in Fig.l and Fig. 2, radiator is a prime device of internal combustion (IC) engine cooling' system (ECS). The partial view schematics show the function and arrangement oi engine cooling.
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As the radiator works, the coolant is heated up resulting into formation of air bubbles inside the coolant volume. These entrapped air bubbles create the cavitations over component contact surfaces and occupy the coolant volume resulting into development of vacuum inside coolant. This causes loss in durability and reliability of radiator system and more consumption of pumping power. These entrapped air bubbles also retard radiator heat cooling capacity because air has much lower heat convection co-efficient as compared to coolant.
In present invention, a baffle is proposed to be integrated inside the radiator inlet tank (1) to compensate the function of DAT (2) as DAT (2) is eliminated from radiator system as shown in figure 2. A baffle (15) is fitted inside radiator inlet tank (1) by bolting between baffle (15) to support projections (20) as shown in Figure 3. The volume above baffle (15) is called as coolant expansion volume (16) where coolant is never raised over the baffle (15). This level can be controlled through numbers of vent holes (17). While air bubbles are generated, they come out to expansion volume (16) through vent holes (17) of baffle (15) where they get exhausted to atmosphere by passing through expansion volume (16) to filler neck (12), orifice tube (21), and recovery bottle (19) as shown in figure 2. It is necessary to maintain the coolant level inside the radiator system with varying coolant volume due to density variation of coolant heating and cooling. This requires a separate recovery bottle (19) which is assembled as shown in Figure 2. This recovery bottle is connected to filler neck (12) through orifice tube (21). While coolant level varies due to density variation and evaporation, sufficient coolant level inside radiator inlet tank (1) is recovered by recovery bottle (19) by means of pressure control valve which is mounted on filler neck (12). Figure 4 shows the details of de-
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aeration vent available in the baffle of the tank. The steam or vapour escapes from the radiator to the upper section of tank through this vent.
Advantages of the present invention:
1. Manufacturing and material cost saving due to elimination of DAT.
2. Saving in weight .3. Ease of handling

4. Improved aesthetics