FORM 2
THE PATENTS ACT 1970
(39 of 1970)
&
THE PATENTS RULES, 2003
COMPLETE SPECIFICATION
(See Section 10; rule 13)
TITLE OF THE INVENTION
"VEHICLE CABIN HEATING AND COOIANG ARRANGEMENT"
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
INVENTOR
Coutam Mandal, Anup Barik, Arijit Sao, S Dey Sarkar, Sandeep Kumar Pradhan
All Indian national
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
The following specification particularly describes the disclosure and the manner in which
it is to be performed.

TECHNICAL FIELD
The present disclosure generally relates to automotive vehicles and more particularly to heating and cooling arrangement of an automotive vehicle.
BACKGROUND OF THE DISCLOSURE
The typical exhaust systems usually include an exhaust pipe carrying an exhaust from the internal combustion engine generated during the operation of the internal combustion. A tail pipe of the typical exhaust system communicates the exhaust gasses to outer atmospheres. The exhaust coming from the internal combustion engine typically comprises of heated gases. Typically, the prior-art mufflers hitherto are used for one purpose i.e. for noise attenuation. In light of the same, there exists a need for a heating/cooling arrangement having an exhaust muffler that effectively utilizes heat energy of the exhaust gases for other purposes, such as vehicle cabin heating as well as cooling.
OBJECTS OF THE DISCLOSURE
The objective of disclosure is to provide a reliable, cost effective, and simple heating and cooling arrangement that enables heating and cooling of an automobile cabin from heat of exhaust gases.
Another object of the present disclosure is to provide an exhaust muffler that facilitates sufficient heat exchange between exhaust gases and circulating gases and refrigerant.
Another object of the present disclosure is to provide an exhaust muffler that keeps the back pressure within a predetermined limit.

Another object of the present disclosure is to provide an exhaust muffler that overcomes or obviates the disadvantages associated with the prior art.
Further objects and features of the disclosure will become apparent from the following detailed description when considered in conjunction with the drawings.
SUMMARY OF THE DISCLOSURE
The embodiments of the present disclosure relate to a vehicle cabin heating and cooling arrangement comprising a tubular exhaust pipe having a tangential inlet pipe and a longitudinal outlet pipe; an engine exhaust pipe connected to the tangential inlet pipe for communicating exhaust gasses from the engine to the tubular exhaust pipe; at least one heat exchanger provided within the tubular exhaust pipe such that the longitudinal outlet pipe passes therethrough; at least one heat exchange pipe fluidicaly connected to the heat exchanger and the vehicle cabin; and flow inducer coupled with the heat exchange pipe for forcing heat exchanged gas and refrigerant from the heat exchanger to the vehicle cabin.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 illustrates a top view of a portion of an automobile utilizing the heating arrangement, in accordance with an embodiment of the present disclosure.
FIG. 2 illustrates side view of the automobile utilizing the heating arrangement of FIG. 1, in accordance with an embodiment of the present disclosure.
FIG. 3 illustrates perspective view of an exhaust muffler of the heating arrangement, in accordance with an embodiment of the present disclosure.

FIG. 4A and 4B illustrate three dimensional sectional view of an exhaust muffler of the heating arrangement of FIG. 1, in accordance with an embodiment of the present
disclosure.
FIG. 5 illustrates a two dimensional cut sectional view of the exhaust muffler of the heating and cooling arrangement in accordance with another embodiment of the present disclosure.
FIG. 6A and 6B illustrate sectional side view of the of the exhaust muffler of the heating and cooling arrangement in accordance with another embodiment of the present disclosure.
FIG. 7 illustrates a side view of the automobile utilizing the heating and cooling arrangement of FIG. 5, in accordance with an embodiment of the present disclosure.
FIG. 8 illustrates another side view of the automobile utilizing the heating and cooling arrangement of FIG. 5, in accordance with an embodiment of the present disclosure.
DETAILED DESCRIPTION OF THE DISCLOSURE
Referring now to the drawings wherein the showings are for the purpose of illustrating a preferred embodiment of the disclosure only, and not for the purpose of limiting the same.
FIG. 1, 2 and 3 illustrate various views of a portion of an automobile 10 utilizing a heating arrangement 100, in accordance with an embodiment of the present disclosure. The automobile may be a commercial vehicle with high load carrying capacity. The automobile 10 includes a chassis member 12 and a body member having a cabin 14 (also referred to as "cab 14") and a rear portion (not shown). The cab 14 may be carried by the chassis member 12. The automobile 10 also includes axles having wheels hubs (not

numbered). The axles inter alia are also supported on the chassis member 12. The heating arrangement 100 is also supported on chassis member 12.
The heating arrangement 100 includes a tubular exhaust pipe 102. The elongated tubular exhaust pipe 102, in one embodiment may be supported on a long member of the chassis member 12. Dimensioned similar to a conventional exhaust muffler, the tubular exhaust pipe 102 includes a tangential inlet pipe 104 and a longitudinal outlet pipe 106. The tangential inlet pipe 104, as best shown in FIG. 3, is connected perpendicularly on the peripheral surface of the elongated tubular exhaust pipe 102, such that the tangential pipe 104 is offset from a central axis of the tubular exhaust pipe 102. The tangential inlet pipe 104 includes a portion of enlarged volume 103. Visible as a cylindrical portion of enlarged diameter, the portion of the enlarged volume 103 is defined at an end portion of the tangential inlet pipe 104.
An engine exhaust pipe 105 is connected to the free end portion of the tangential inlet pipe 104. Therefore when the engine is operating, the engine exhaust pipe 105 supplies heated exhaust gases to the tangential inlet pipe 104. In one embodiment of the present disclosure, such heated exhaust gases undergo expansion in a first expansion chamber defined within the portion of enlarged volume 103 of the tangential inlet pipe 104.
The elongated tubular exhaust pipe 102 has end plates at both the opposite ends, giving it a close ended tubular configuration. The longitudinal outlet pipe 106 passes through one end plate. One end portion of the longitudinal outlet pipe 106 is within the elongated tubular exhaust pipe 102, whereas another end of the longitudinal outlet pipe 106 is positioned outside the elongated tubular exhaust pipe 102. The longitudinal outlet pipe 106, therefore, communicates exhaust gases from the elongated tubular exhaust pipe 102 to outside. In one embodiment of the present disclosure, the longitudinal outlet pipe 106 is positioned concentrically and longitudinally within the elongated tubular exhaust pipe 102.
Towards an end of the elongated tubular exhaust pipe 102, from where the longitudinal outlet pipe 106 comes out, a cylindrical whirling ring 108 is provided within the tubular

exhaust pipe 102. The longitudinal outlet pipe 106 also passes through the cylindrical whirling ring 108. Clearly, the cylindrical whirling ring 108 has an external diameter lesser that internal diameter of the elongated tubular exhaust pipe 102,
The configuration of the cylindrical whirling ring 108, and the positioning of the tangential inlet pipe 104 with respect to a central longitudinal axis (not illustrated) of the elongated tubular exhaust pipe 102, causes the exhaust gases from the tangential inlet pipe 104 to move in whirling motion within the elongated tubular exhaust pipe 102.
At times, due to long use carbon deposition may cause partial blockage of the heat exchanger pipe, so there may be a chance of increase in back pressure. As would be evident to those skilled in the art, the increased back pressure reduces the engine performance, particularly with regard to the mileage KMPL (kilometer per liter) obtained therefrom. It is for this purpose that a pressure valve 110 is provided, in the present discloser. The cylindrical whirling ring 108 is provided with the pressure valve 110. The pressure valve 110 may be a sensitivity adjustable spring loaded valve. When the pressure of the gasses coming from the tangential inlet pipe 104 is beyond a predetermined value, the pressure valve 110 opens and exhausts the gasses to the atmosphere. In alternative embodiments, the pressure valve may be provided on the elongated tubular exhaust pipe 102. Alternatively, as illustrated in the figures, the pressure valve 110 may be provided on the cylindrical whirling ring 108 such that, the pressure valve 110 is connected a notch (best visible in FIG. 4) on the longitudinal outlet pipe 106. Therefore, upon opening, the pressure valve 110 provides a passage to the exhaust gases in a first chamber 114 to the notch.
The first chamber 114 is within the elongated tubular exhaust pipe 102 and, is defined by the first end plate, the cylindrical whirling ring 108 and a heat exchanger 116. The heat exchanger 116 is provided within the tubular exhaust pipe 102 such that the longitudinal outlet pipe 106 passes therethrough. The elongated tubular exhaust pipe 102, as best shown in FIG. 3 and 4, includes a first perforated end plate 118, a second perforated end plate 120, and a set of perforated finned tubes 122 connecting perforation of the first perforated end plate 118 with respective perforations of the second perforated end plate

118. In an alternative embodiment of the present disclosure, best illustrated in FIG. 5, the heat exchanger 116 further includes one more perforated plate 119 is there, to divide the heat exchanger 116 in two different heat exchanger chambers.
The set of finned tubes 122 has about 150 to 200 finned tubes 122 of inner diameter of about six millimeter to ten millimeter. However, in alternative embodiments of the present disclosure, there may be fewer or more finned tubes of different diameter, without deviating from the spirit of the present disclosure. The fins are disposed spirally on each tube of the set of tubes 122 and have circular and triangular cut outs to increase the convective heat transfer.
The first perforated end plate 118 and the second perforated end plate 120 allow the longitudinal outlet pipe 106 to pass through. The heated exhaust gasses of the first chamber 114 pass through the set of finned tubes 122 connecting perforation of the first perforated end plate 118 with respective perforations of the second perforated end plate 120 to reach a second chamber 124.
The second chamber 124 is defined by the second perforated end plate 120, and the end plate (end portion of the tubular exhaust pipe 102). An end portion of the longitudinal outlet pipe 106 is positioned with in the second chamber 124. Particularly, the end portion of the longitudinal outlet pipe 106 is a perforated entry portion positioned, and is positioned within the second chamber 124. The exhaust gasses coming from the heat exchanger come to the second chamber 124, and then through the perforated entry portion they enter the longitudinal outlet pipe 106. The longitudinal outlet pipe 106 subsequently communicates the gasses to out side.
A heat exchange pipe 130 is fluidicaly connected to the heat exchanger 116 and the vehicle cabin 14. The heat exchange pipe 130 includes a cabin air outlet/atmospheric air inlet pipe 134 and a cabin air inlet pipe 132. The cabin air outlet/atmospheric air inlet pipe 134 is connected to an inlet of the heat exchanger 116. The cabin air inlet pipe 132 is connected to an outlet of the heat exchanger 116. During such passage, the cabin air/atmospheric air undergoes heat exchange with exhaust gasses, and therefore the

temperature of the air increases. The air of increased temperature is supplied to the cabin 14 by the cabin air inlet pipe 132. A flow inducer 136 is provided to induce the flow in air in the cabin air outlet pipe 134 and the cabin air inlet pipe 132.
In one embodiment, the flow inducer 136 is a blower fan, carried by the cabin air outlet pipe 134. Alternatively, the blower fan may be carried by the cabin air inlet pipe 132. The blower fan may be driven by a solar battery/cells (not numbered) carries on top on vehicle cabin 14.
Referring again to FIG. 1, 2 and 3 the heating/cooling arrangement 100 further includes an auxiliary pipe 138 coming from a compressor and connected to the tangential inlet pipe 104. Since it was earlier seen that, after long use there develops a chance of partial blockage of the heat exchanger pipe by carbon deposition of the exhaust gas, the auxiliary pipe 138 is provided. The auxiliary pipe 138 is the provision to clean the pipes by blowing the pressurized compressed air to the heating arrangement 100, when required.
Furthermore, the heating/cooling arrangement 100 discloses a tyre cooling pipe 140 connecting the vehicle cabin 14 to rear tyre (not numbered). A flow inducer, such as the flow inducer 136 may be associated with the pipe. During summer the flow inducer will suck the air from cabin 14 for better ventilation and will deliver the same air to the rear tyre through the pipe 140. This may also assist in tyre cooling.
Referring now to another embodiment of the present disclosure, illustrated best in FIG. 5 to FIG. 8, the arrangement 100 may also carry out cooling functions. The arrangement 100 of this embodiment also includes a cold refrigerant inlet pipe 142 connected to the elongated tubular exhaust pipe 102, and a hot refrigerant outgoing pipe 144 through which the hot refrigerant will enter into the refrigeration cycle (VARS). The cold refrigerant will inter in between an outer shell 146 and the inner shell 148. The cold refrigerant will whirl on the inner shell 148 of the elongated tubular exhaust pipe 102 along the spiral plate 150. It may herein be noted that, the spiral plate 150 forms a spiral channel between the outer shell 146 and the inner shell 148. During whirling the cold

refrigerant will absorb the heat from the exhaust gas and will become hot. This is the first stage heating of the refrigerant. For second stage of heating of the refrigerant, valves 152 and 154 will remain close and valve 156 will be in open condition and the refrigerant will move towards the heat exchanger 116, where it will become hotter and will go to the refrigeration cycle (VARS).
During heating provision .the refrigerant should not be in between the shell 146 &148, otherwise the pressure rise of the refrigerant will be very high and there is a chance of bursting of silencer shell, that's why its need to store the refrigerant in the storage tank. To store the refrigerant in the refrigerant tank, it is needed to open the valve 152 & 154 and to push back the refrigerant to the storage tank from the shell (i.e. annular gap between 146 and 148) by compressed air. Compressed air pipe line 138 is also connected with the cold refrigerant line 144 with valve arrangement (not numbered). In this way it is possible to store the entire refrigerant in the storage tank 155. After storing the refrigerant in the storage tank again its need to close the valve 152 and 154, in this situation heating provision of the silencer can run.
For cooling provision again it is needed to send the refrigerant into the silencer shell, for that the pump 157 will send the refrigerant into the silencer shells through the refrigerant control valve 158. During pumping, valve 152 & 154 will be in close condition and valve 156 will be in open condition. After pumping all refrigerant the valve 158 should be kept in closed condition.
The foregoing description provides specific embodiments of the present disclosure. It should be appreciated that these embodiment are described for purpose of illustration only, and that numerous other alterations and modifications may be practiced by those skilled in the art without departing from the spirit and scope of the disclosure. It is intended that all such modifications and alterations be included insofar as they come within the scope of the disclosure as claimed or the equivalents thereof.

Referral Numerals Description
10 Automobile
12 Chassis
14 Cabin
102 Elongated tubular exhaust pipe
104 Tangential pipe
103 Portion of enlarged volume
105 Engine exhaust pipe
106 Longitudinal outlet pipe
108 Cylindrical whirling ring
no Pressure Valve
114 First chamber
116 Heat exchanger
118 First perforated end plate
119 perforated plate
120 Second perforated end plate
122 Set of finned tubes
124 Second chamber
130 Heat exchange pipe

134
Cabin air outlet pipe
132 Cabin air inlet pipe
136 Flow inducer
138 Auxiliary pipe (compressed air)
140 Tire cooling Pipe
142 Cold refrigerant inlet pipe
144 Hot refrigerant outgoing pipe
146 Outer shell
148 Inner shell
150 Spiral plate
152, 154, 156 Valves
157 Refrigerant filling pump
158 Refrigerant control valve

We claim:
1. A vehicle cabin heating and cooling arrangement comprising:
a tubular exhaust pipe having a tangential inlet pipe and a longitudinal outlet pipe;
an engine exhaust pipe connected to the tangential inlet pipe for communicating exhaust gasses from the engine to the tubular exhaust pipe;
at least one heat exchanger provided within the tubular exhaust pipe such that the longitudinal outlet pipe passes therethrough;
at least one heat exchange pipe fluidicaly connected to the heat exchanger and the vehicle cabin; and
a flow inducer coupled with the heat exchange pipe for forcing one of a heat exchanged gas and a refrigerant, from the heat exchanger to the vehicle cabin.
2. The vehicle cabin heating arrangement as claimed in claim 1 further comprising, a cylindrical whirling ring on an end portion of the tubular exhaust pipe, such that exhaust gases coming from the tangential inlet pipe move therealong.
3. The vehicle cabin heating arrangement as claimed in claim 1 further comprising a pressure sensitive valve carried by the tubular exhaust pipe, the pressure sensitive valve being adapted to allow exist of the exhaust gasses therethrough, when the pressure thereof exceeds a predetermined value.
4. The vehicle cabin heating arrangement as claimed in claim 1 wherein the heat exchanger includes a first perforated end plate, a second perforated end plate, and a set of finned tubes connecting perforation of the first perforated end plate with respective perforations of the second perforated end plate.
5. The vehicle cabin heating arrangement as claimed in claim 1 wherein the longitudinal outlet pipe includes a perforated entry portion positioned within a chamber defined by an end portion of the tubular exhaust pipe and second perforated end plate.

6. The vehicle cabin heating arrangement as claimed in claim 1, wherein a cabin air outlet pipe connects inlet of the heat exchanger, and a cabin air inlet pipe connected to an outlet of the heat exchanger.
7. The vehicle cabin heating arrangement as claimed in claim 1, wherein the flow inducer is a blower fan carried by one of the cabin air outlet pipe and the cabin air inlet pipe.
8. The vehicle cabin heating arrangement as claimed in claim 7, wherein the blower fan in driven be solar cells carried by the vehicle cabin.
9. The vehicle cabin heating arrangement as claimed in claim 1 further includes an auxiliary pipe coming from a compressor and connected to the tangential exhaust gas inlet pipe and cold refrigerant inlet pipe for supplying pressurized air thereto.
10. The vehicle cabin heating arrangement as claimed in claim 1, wherein the tangential
inlet pipe includes a portion of enlarged volume.