FIELD OF INVENTION
This invention relates to a novel exhaust energy recovery system for improved
turbo charging at lower engine RPMs.
PRIOR ART
Exhaust energy recovery system is known to have been provided, in which
water is converted into superheated Steam, which is utilized for rotating the
turbocharger at high speed. So that, high flow can be achieved duri.lg lower
engine RPM. In this system, approximately 20% of total exhaust energy is
utilized by turbocharger to produce high air flow to the engine. However,
remaining 80% still goes waste in tail pipe. Hence, the present invnetion has
been proposed to utilize more exhaust energy.
OBJECTS OF THE INVENTION
The primary object of the present invention is to provide a novel exhaust energy
rccovcry system for improved turbo charging at lower engine RPMs which leads
to improvement in the engine performance.
Another object of the present invention is to provide a novel exhaust energy
rccovcry system for improved turbo charging at lower engine RPMs which is
reliable and efficient.
Furthcr object of the present invention is to provide a novel exhaust energy
recovery system for impkoved turbo charging at lower engine RPMs which is
simple in construction.
SUMMARY OF THE INVENTION
According to this invention, there is provided a novel exhaust energy recovery
systcm for improved turbo charging at lower engine RPMS comprising a tube
for water flow, wherein the water is heated to steam by means of waste exhaust
gas for rotation of turbocharger to produce higher air flow.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWING
Further objects and advantages of this invention will be more apparent from
the ensuing description when read in conjunction with the accompanying
drawing and wherein:
Fig. 1 shows: A novel exhaust energy recovery system for improved turbo
charging at lower engine RPMs in accordance with the
present invention.
DETAIL DESCRIPTION OF THE INVENTION WITH REFERENCE TO THE
ACCOMPANYING DRAWING
This invention discloses a novel exhaust energy recovery system for improved
turbo charging at lower engine RPMs.
Exhaust recovery system of the present invention utilizes waste exhaust gas for
steam generation, which is used to rotate TC at high speed. Hence, higher air
availability for engine at low engine speeds.
The present irlvention utilizes - 40% of total energy available at tail pipe end
for converti~ig water in to super heated steam at. high pressure (- 5 bars,
>200°C). The same is utilized for running the turbocharger at higher RPM for
hcttcr air and boost conditions. Constant pressure is maintained throughout
thr cnginc RPM for better turbine effi~iency~therebiym proving the engine
c3u tput.
Enera- recovery from exhaust also decreases the temperature, which results in
a higher temperature difference across the turbocharger. This makes the
cxl~austto expand more to improve the turbine efficiency further high.
Now, reference may be made to fig. 1 indicating system of the present invention
comprising of
1 .Engine Assembly
2. Turbocharger
3. Water Tank
4. Flexible Cooper tube
5. Water Feed pump
6. Nozzle for steam entry
'/. Tail pipe
The novel exhaust energy recovery system for improved turbo charging at lower
engine RPMs comprising of a metallic tube connected to a water tank, in which
water flowing through said tube is heated to steam by means of waste exhaust
gas in tail pipe provided in communication with the metallic tube, wherein the
steam is heated to superheated steam., which is supplied through nozzle for
rotation of turbocharger.
'l'he tube is preferably made of copper. It extracts heat from the exhaust gas.
Water feed pump and control valve are provided for flow control.
Thus, exhaust energy recovery system is assembled in the exhaust line in such
a way by which - 40 94 of waste exhausts energy is utilized for water to super
heated steam conversion. By utilizing the exhaust gas temperature water is
converted to steam and further addition of heat converts it in to the
superheated steam with temperature > 200°C & -5 bar pressure.
Superheated steam through nozzle is utilized for turbocharger rotation
especially at lower engine RPMs where rate of Exhaust flow and turbine speed
is low in comparison with higher engine RPMs.
It helps in running the bigger turbocharger to produce higher air flow
throughout the working zone. Provision of bigger turbocharger with this system
tili-ther improves air flow and low end torque of engine.
It is to be noted that the present invention is susceptible to modifications,
adaptations and changes by those skilled in the art. Such variant embodiments
employing the concepts and features of this invention are intended to be within
the scope of the present invention, which is further set forth under the
following claims:-

WE CLAIM:
1. A novel exhaust energy recovery system for improved turbo charging at
lower engine RPMS comprising a tube for water flow, wherein the water is
heated to steam by means of waste exhaust gas for rotation of
turbocharger to produce higher air flow.
2. A novel exhaust energy recovery system as claimed in claim 1, wherein
the tube accommodating water flow is preferably metallic tube connected
to a water tank.
3. A novel exhaust energy recovery system as claimed in claim 1 or 2,
wherein the water flow through said tube is heated to steam by means of
waste exhaust gas in tail pipe in communication with the metallic tube.
4. A novel exhaust energy recovery system as claimed in claim 3, wherein
the steam is heated to superheated steam, which is supplied though a
nozzle for rotation of the turbocharger.
5. A novel exhaust energy recovery system as claimed in any of the
preceding claims, wherein water feed pump and control valve are
provided for flow control.
6. A novel exhaust energy recovery system as claimed in any of the
preceding claims, wherein the superheated steam through nozzle is
utliizccl for turbocharger rotation especially at lower engine KPMs where
rate of Exhaust flow and turbine speed is low in comparison with higher
engine RMPs.
7. A novel exhaust energy recovery system as claimed in any of the
preceding claims, wherein provision of bigger turbocharger with the
system further improves air flow and low end torque of engine.
8. A novel exhaust energy recovery system for improved turbo charging at
lower engine RPMs substantially as herein described with reference to
the accompanying drawing.