FIELD OF INVENTION
The present invention relates to manufacture of improved air duct assembly for comfort
of crew of locomotive.
BACKGROUND OF THE INVENTION
The conventional locomotive being manufactured by large Industrial houses possess
following demerits in operational point of view:
(i) The existing conventional locomotive having a driver's cabin which provides a
small room and drivers has to drive locomotive in standing position mostly,
(ii) The driver cabin is not designed ergonomically and driver can not operate the
locomotive comfortably,
(iii) The shape and outlook of locomotive is not appealing,
(iv) The layout of equipments in cabin is congested and not friendly to
maintenance crews.
The inventor has emphasized on producing an improved locomotives with a different
viewpoint to eliminate the existing demerits of the conventional locomotives.
The modified view to manufacture a locomotive having following characteristics:

(1) Spacious driver cabin with air conditioning and comfortable driver seat.
(2) Altered equipment layout to create more space for cabin.
(3) Re-oriented cabin shape to improve aesthetic of locomotives.
To manufacture such improved locomotive, certain specification of locomotive of the
vendor is compulsory to follow for adjustment of the applicability in all spheres of
railways and acceptable by inspection authority of the purchaser.
While placing the equipment as per modified equipment layout in engine room, it has
been observed that AC2 panel (a big size panel having control equipments) has
infringement with air duct which is provided for cooling fraction motors.
Now, to overcome above problem there were two possible solutions:
(1) To manufacture an improved new duct assembly to compensate the space
available.
(2) To shift the AC2 Panel position without infringement with the duct.
The shifting of the AC2 Panel position, it involves certain difficulties as mentioned below,
hence it was not advisable:
(i) Structure of AC2 Panel becomes very weak and may fail against heavy
vibration and shock loading during running of locomotive.
(ii) Inside room of AC2 Panel get reduced.

(iii) Since all the equipments inside the panel to be accommodated within
the reduced space the maintenance of the equipments becomes
difficult.
Hence, inventor decided to alter the existing duct assembly by manufacturing an
improved ducting assembly to avoid infringement with the panel box. Accordingly the
inventor prepared the new layout by changing the design and routing the duct and
implemented successfully on the locomotive. To freeze the design of duct detailed
calculation for air flow losses (Static head and dynamic head) have been carried out
before implementation. After implementation all the air flow parameters were measured
and found satisfactory.
OBJECTS OF THE INVENTION
It is therefore, an object of the present invention to propose the manufacture of an
improved duct assembly for comfort of crew of locomotive which eliminates the
disadvantage of the existing conventional locomotive.
Another object of the present invention is to propose the manufacture of an improved
duct assembly for comfort of crew of locomotive which facilitates driver to operate
locomotive in comfortable condition.

A further object of the present invention is to propose the manufacture of an improved
duct assembly for comfort of crew of locomotive which provides more space for
maintenance people to work.
A still further object of the present invention is to propose the manufacture of an
improved duct assembly for comfort of crew of locomotive which gives better aesthetics
and economically designed driver cabin.
An yet further object of the present invention is to propose the manufacture of an
improved duct assembly for comfort of crew of locomotive which provides uniform
cooling of all 6 nos. traction motors.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
Fig.1 - shows a isometric view of the prior art
Fig.1A - shows an elevation view of the prior art
Fig. 1B - shows a plan view of the prior art
Fig.2 - shows an isometric view of improved duct assembly as per invention
Fig. 2A - shows an elevation view of improved duct assembly as per invention
Fig. 4 - shows a plan view of improved duct assembly as per invention

DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT OF THE
INVENTION
As shown in Fig.1, the AC2 panel box (1) is disposed behind the driver (2) and in front
of the dust assembly (3). The gap/space (D) between the driver and the AC2 panel is
very small. Again the gap (D1) between the AC2 panel and the duct assembly is very
less. The existing duct assembly in the conventional locomotives comprises of a first
vertical duct member (4), a second horizontal member (5) parallel to the side wall of
the locomotive, a third duct member (6) parallel to AC2 panel back cover, all three
members are connected each other with a right angle bend. The duct member (6) is
connected to a rectangular chamber (7) and from this further a vertical duct member
(8) is connected for catering air downward through a port (9) through which the
traction motors disposed below the under frame are cooled. The problems arising out of
such layout was mentioned in the background of the Invention.
Fig.1A shows a elevational view of existing layout of the conventional locomotives.
Fig.1B shows a plan view of the existing layout.
The present invention provided with a manufacture of improved duct assembly as
shown in Fig.2, 2A, 2B. To provide more space in the driven cabin, the AC2 panel box is
placed and shifted to backside of driver keeping more space vacant D2 where D2 is

greater than D1. As a result of such shifting of panel box (1), the air inlet port (9) of
traction was blocked and its position was disposed beneath the panel box (1).
The improved duct assembly comprises a first vertical duct member (4), a second
horizontal duct member (5) parallel to the side wall of the locomotive and a third duct
member (6) parallel to the backside of AC2 panel box and all the members are
connected to each other by a right angle bend (10,11). The third duct member (6) is
connected a rectangular box (7) from which a forth duct member (8) is connected to
cater air through air inlet port (9) of the traction motor disposed at an angle of 45°
beneath the panel box. This ensures all the functional requirements to cool the
tractional motors and air flow parameters and the driver's free movement inside the
cabin.

WE CLAIM
1. Manufacture of an improved air duct assembly for comfort of crew of locomotive,
the improvement is characterized in that the duct assembly comprises
- a first vertical duct member (4), a second horizontal duct member (5) parallel to
the side wall of locomotive, a third horizontal duct member (6) parallel to the
backside of panel box is being connected by two right angle bend (10,11) and
the third duct (6) is connected to a rectangular box (7) through which a fourth
duct member (8) is connected to cater the air through inlet port (9) of the
traction motor disposed at angle of 45° with the floor of the locomotive.

The present invention relates to a manufacture of an improved air duct assembly for
comfort of crew of locomotive, the improvement is characterized in that the duct
assembly comprises a first vertical duct member (4), a second horizontal duct member
(5) parallel to the side wall of locomotive, a third horizontal duct member (6) parallel to
the backside of panel box is being connected by two right angle bend (10,11) and the
third duct (6) is connected to a rectangular box (7) through which a fourth duct
member (8) is connected to cater the air through inlet port (9) of the traction motor
disposed at angle of 45° with the floor of the locomotive.