This invention relates to a device for the utilisation of exhaust gas energy ofanIC engine including that of an automobile engine, for t]he purpose of harnessing such energy, which woirid otherwise be wasted by the discharge of exhaust gases into the atmosphere. More particularly, thijs invention relates to a forced air cooled engine.
Presently, a substantial portion of the total energy supplied to an IC engine is wasted through the exhaust.
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It is therefore an object of this invention to propose a device which utilises this energy.
Another object of this invention is to propose a device as aforesaid which needs very little alteration in the automobile engine structure. Such alteration can be carried out during manufacture without encountering any problems on the assembly line.

Yet another object of this invention is to propose a device as aforesaid which involves a marginal increase in cost of the vehicle. In any event, the increase in cost is more than compensated by the saving in fuel resulting from utilisation of exhaust gas energy.
Other features of this invention villi be apparent from the further description thereof given hereunder.
The device fox the utilisation of exhaust gas energy of a forced air cooled IC engine, according to this invention, comprises a gas turbine provided for the said engine, the turbine being enabled, with the engine running, to rotate under the thrusit of exhaust gases of the engine impinging on the tujrbme vanes; a cooling fan provided for the engine, said fan being coupled to the said turbine for cooling the engine.
This invention will now be described with reference to the accompanying drawings the single Figure in which illustrates, by way of example, and not by way of

limitation, one of possible embodiments of this invention.
A gas turbine T is provided for the| forced air cooled engine E. When the engine is running with exhaust gases emerging from the exhaust pftpe P, the turbine is enabled to rotate under the thrusjt of the exhaust gases impinging on the vanes of the turbine.
A cooling fan F is provided for the engine, said fan being coupled to the said turbine fpr providing cooling
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air to the engine. The power for tfye fan is thus obtained by the energy imparted by the exhaust gases. If, in any given case, such power j alone is not sufficient to drive the fan, the power is augmented by power directly supplied by the engine itself whenever the engine is also coupled to the fan.
The inlet of the turbine is, preferably, located adjacent, and in close proximity, to the outlet of the exhaust pipe of the engine. The closer the outlet of the exhaust pipe to the inlet of the turbine, the greater the

thrust available to the turbine, by avoiding transmission losses that may be incurred in the travel of the said gases to the inlet of the turbine. As a matter of fact, the exhaust pipe isj preferably made to have a minimum length with this purpose in view.
It will be appreciated that various| other embodiments of this invention are possible without departing from the scope and ambit of this invention.

We Claim:
1. A device for the utilisation of exhaust gas energy of a forced air cooled IC engine comprising a gas turbine provided for the said engine, the turbine being enabled, with the engine running, to rotate under the thrust of exhaust gases of the engine impinging on the turbine vanes; a cooling fan provided for the engine, said fan being coupled to the said turbine for cooling the engine.
2. A device as claimed in Claimj 1 wherein the inlet of the turbine is located adjarient, and in close proximity, to the outlet of the| exhaust pipe of the engine.
3. A device as claimed in Claim 1 or Claim 2 wherein the exhaust pipe is of minimum possible length.
4. A device for the utilisation of exhaust gas energy of an IC engine substantially as herein described
with reference to, and as illustrated in, the accompanying drawings.