DESC:FORM 2

THE PATENTS ACT, 1970
(39 of 1970)
&
THE PATENT RULES, 2003

COMPLETE SPECIFICATION
(See Section 10 and Rule 13)

Title of invention:
SIGNALING SYSTEM COMPLAINT CATENARY MAINTENANCE VEHICLE (CMV)

Applicant:
BEML Limited
A company Incorporated in India under the Companies Act, 1956
Having Address As:
BEML Soudha, 23/1, 4th Main,
Sampangirama Nagar, Bengaluru - 560 027,
Karnataka, India

The following specification particularly describes the invention and the manner in which it is to be performed.

CROSS-REFERENCE TO RELATED APPLICATIONS AND PRIORITY
[001] The present invention claims priority from Indian patent application numbered IN 202241063206 filed on 04th November, 2022.

FIELD OF INVENTION
[002] The present subject matter described herein, in general, relates to catenary maintenance vehicle (CMV) and more specifically relates to automatic train control (ATC) for catenary maintenance vehicle (CMV).

BACKGROUND OF THE INVENTION
[003] At present the existing 8 Wheeled Catenary Maintenance Vehicle (CMV) of various metro corporations are Non-Automatic Train Control, which cannot be run during revenue service. Any breakdown in the Over Head Equipment (OHE), the metro trains revenue service will be interrupted. The time available for maintenance of Over Head Equipment (OHE) systems of metro rail in many Indian cities is really less. The available time should be used effectively to keep the OHE systems up all the day, without metro train service interruption. The 8 Wheeled Catenary Maintenance Vehicle (CMV) requires time to reach the breakdown site due to less allowable speed (30-40 km/h) of maintenance vehicles in the mainline track.
[004] Thus, as an alternative solution, a “Signaling System Complaint Catenary Maintenance Vehicle (CMV)” is developed to run the CMV during metro train revenue service to reach at faster speed the breakdown site for carrying out the maintenance activities of OHE.

OBJECTS OF THE INVENTION
[005] Main object of the present invention is to provide an automatic train control (ATC) for catenary maintenance vehicle (CMV).
[006] Another object of the present invention is to provide Automatic Train Control (ATC) interfacing with CMV onboard Brake system for Automatic Train Protection (ATP) grade operation.
[007] Yet another object of the present invention is to provide Catenary Maintenance Vehicle (CMV) to run during revenue service without interruption of revenue metro trains and reach at faster speed to any breakdown sites to attend the maintenance activities.

SUMMARY OF THE INVENTION
[008] Before the present system is described, it is to be understood that this application is not limited to the particular machine or an apparatus, and methodologies described, as there can be multiple possible embodiments that are not expressly illustrated in the present disclosures. It is also to be understood that the terminology used in the description is for the purpose of describing the particular versions or embodiments only, and is not intended to limit the scope of the present application. This summary is provided to introduce aspects related to a signaling system complaint catenary maintenance vehicle (CMV), and the aspects are further elaborated below in the detailed description. This summary is not intended to identify essential features of the proposed subject matter nor is it intended for use in determining or limiting the scope of the proposed subject matter.
[009] The present subject matter described herein, in general, relates to an Automatic Train Control (ATC) interfacing with Catenary Maintenance Vehicle (CMV) onboard Brake system for Automatic Train Protection (ATP) grade operation, which is architect & first of its kind for 8 Wheeled Catenary Maintenance Vehicle (CMV) application. This invention will allow the CMV to run during revenue service and can reach the breakdown site faster along the rail routes of various metro corporations.

BRIEF DESCRIPTION OF THE DRAWINGS
[0010] The foregoing summary, as well as the following detailed description of embodiments, is better understood when read in conjunction with the appended drawing. For the purpose of illustrating the disclosure, there is shown in the present document ex
ample constructions of the disclosure, however, the disclosure is not limited to the specific methods and apparatus disclosed in the document and the drawing:
[0011] The detailed description is described with reference to the accompanying figure. In the figure, the left-most digit(s) of a reference number identifies the figure in which the reference number first appears. The same numbers are used throughout the drawing to refer like features and components.
[0012] Figure 1 illustrates a side view of the CMV.
[0013] Figure 2 illustrates a schematic diagram of the air brake system in CMV.
[0014] Figure 3 illustrates a block diagram of the interface between ATC and Brake system of CMV.
[0015] The figure depicts various embodiments of the present disclosure for purposes of illustration only. One skilled in the art will readily recognize from the following discussion that alternative embodiments of the structures and methods illustrated herein may be employed without departing from the principles of the disclosure described herein.

DETAILED DESCRIPTION OF THE INVENTION
[0016] Some embodiments of this disclosure, illustrating all its features, will now be discussed in detail. The words "comprising", “having”, and "including," and other forms thereof, are intended to be equivalent in meaning and be open ended in that an item or items following any one of these words is not meant to be an exhaustive listing of such item or items, or meant to be limited to only the listed item or items. Although any systems and methods similar or equivalent to those described herein can be used in the practice or testing of embodiments of the present disclosure, the exemplary, systems and methods are now described. The disclosed embodiments are merely exemplary of the disclosure, which may be embodied in various forms.
[0017] Various modifications to the embodiment will be readily apparent to those skilled in the art and the generic principles herein may be applied to other embodiments. However, one of ordinary skill in the art will readily recognize that the present disclosure is not intended to be limited to the embodiments illustrated, but is to be accorded the widest scope consistent with the principles and features described herein.
[0018] Referring to figure 1 and 2, the working of the invention is explained in detail. The Automatic Train Control (ATC) is a crucial feature in the Automatic Train Protection (ATP) grade operation of Railway vehicles and detailed description is as follows:
Automatic Train Control (ATC): ATC is the onboard computer with dedicated Driver Machine Interface (DMI) (10a), speed sensor (10b) and Antennae (10c) as shown in fig 1; with capability to calculate the vehicle speed and location in mainline of operation and communicate the same with wayside system/operation control system for required speed and traffic regulation in order to achieve safe & reliable train operation, up to Automatic Train Protection (ATP) grade of operation.
Onboard Brake System: The 8 Wheeled Catenary Maintenance Vehicle (CMV) is provided with compressed air brake. Each of the driver's cabin (20a) and (20b) as shown in Fig-1 of the Catenary Maintenance Vehicle (CMV) (100) is provided with driver's brake valve by which the brakes can be applied or released. The brake system is equipped for quick application and release of brakes. The equipment is also provided with emergency brake that can also be applied or release through emergency push button by de-energizing the EP relay valves (20c) as shown in Fig-2 which will vent the brake pipe to atmosphere through BP emergency exhaust valve. The emergency brake can also be triggered through Automatic Train Control (ATC) mode by de-energizing the EP relay valves (20c) as shown in Fig-2 which will vent the brake pipe to atmosphere through BP emergency exhaust valve. In addition, as a redundancy, during all means of applying an Emergency Brake application (20c), in-parallel to the Brake Pipe drop by Emergency valve during an Emergency brake application, the EP valve (20d) as shown in Fig-2 connected to service brake line is also de-energised together to apply a direct brake application to supply a regulated air pressure from the Pressure regulator and pilots the Brake Cylinder C2W Relay valve to apply the Brakes. In this Emergency Brake application process, the quicker one among the two (Auto or Direct Brakes) will apply the Brakes. An integrated brake panel has been used to control the whole brake system and this has been adopted from locomotive application.
[0019] The present invention uses electrically triggering or de-energised the EP relay valve with micro switch for operating the 8 Wheeled Catenary Maintenance Vehicle (CMV) through ATC system. Air Brake system with EP relay valves and Electrical Emergency brake valve are reliable in terms of quick application and release. A redundancy in braking through Service brake EP relay valve & Emergency EP relay valve will be applied and released together.
[0020] Figure shows the block level architecture of interface between ATC and Brake system of CMV to achieve the ATP grade of operation. Specifically, here scope of activity involves in designing of Brake system to honor the safety commands of onboard ATC to achieve the intended functionality and required CMV.
[0021] Figures 1-3 are now described using the reference numbers stated in the below table.
Reference Numeral Description
10a Driver Machine Interface
10b Speed sensor
10c Antennae
20a,20b Driver’s cabin
20c EP relay valves
20d EP valve
100 Catenary Maintenance Vehicle (CMV)

,CLAIMS:
1. A signalling system complaint catenary maintenance vehicle (CMV) (100) comprising:
a central control system to determine the location and speed of the CMV in real time;
a driver machine interface (10a);
a speed sensor (10b);
an antenna (10c);
an automatic train control (ATC) configured to be connected to the central control system to determine the speed of the CMV (100) and controlling the CMV based on the signal from speed sensor (10b);
plurality of braking units configured for direct application of brakes or through a central control system; and
plurality of relay valves configured for applying brakes to the braking units.

2. The signalling system complaint catenary maintenance vehicle (CMV) (100) as claimed in claim 1, wherein said braking units are configured of pneumatic brake or hydraulic brake.

3. The signalling system complaint catenary maintenance vehicle (CMV) (100) as claimed in claim 1, wherein said relay valves are configured of electro-pneumatic valves (EP).

4. The signalling system complaint catenary maintenance vehicle (CMV) (100) as claimed in claim 1, wherein said brakes are configured to applied by plurality of brake valves provided in driver cabin (20a, 20b).

5. The signalling system complaint catenary maintenance vehicle (CMV) (100) as claimed in claim 1, wherein said brakes are configured to be applied by plurality of emergency push buttons provided in driver cabin (20a, 20b) by de-energizing plurality of Electro-pneumatic (EP) relay valves (20c);

6. The signalling system complaint catenary maintenance vehicle (CMV) (100) as claimed in claim 1, wherein said brakes are configured to be applied by central control system by sending signal to the automatic train control (ATC) to de-energizing plurality of Electro-pneumatic (EP) relay valves (20c) based on the predefined parameters.

7. The signalling system complaint catenary maintenance vehicle (CMV) (100) as claimed in claim 1, wherein said brakes are configured to be applied by activation of Electro-pneumatic (EP) for emergency brakes.