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:
ELECTRONIC CONTROL OF ENGINE VIBRATIONS USING PIEZO ELECTRIC MATERIAL IN TORSIONAL VIBRATION DAMPER

Applicant:
BEML Limited
A company Incorporated in India under the Companies Act, 1956
Having address:
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 APPLICATION AND PRIORITY
[001] The present invention claims priority from Indian patent Provisional Application 202141029269 filed on 29th June, 2021.

TECHNICAL FIELD
[002] The present subject matter described herein, in general, relates to a system for electronic control of engine vibrations using piezo electric material in torsional vibration damper.
BACKGROUND
[003] In a conventional automotive vehicle, the rotational force of the internal combustion engine (ICE) is transmitted to the wheels via a powertrain of the vehicle. During operation of the engine high combustion loads in the ICE are known to transmit torsional vibrations along components of the powertrain, such as the crankshaft, which causes the components to twist and bend. If the vibrations are not controlled, this will lead to ultimate failure of crank shaft.
[004] The torque fluctuations induced by the torsional vibration can be sufficient to cause the components of the powertrain to fatigue over time. It can also result in significant noise vehicle harshness (NVH) issues. Internal combustion engines are typically fitted with passive torsional vibration dampers (TVDs), which will absorb torsional vibration energy through the elastic deformation of rubber dampers or through viscous losses of a hydraulic fluid. In this way the TVDs convert torsional vibration energy into thermal energy, which is then dissipated to the local environment. Consequently, such passive dampers are inherently inefficient at transmitting power from the ICE as a significant proportion of the torque is lost as heat which is radiated from the TVD. Furthermore, passive dampers are unable to react to the varying output of the ICE such that they are ineffective at certain engine speeds and conditions.
[005] Conventional dampers are of Two types – Viscous fluid and spring damper as illustrated below: Working principle of the conventional damper: Viscous fluid damper as illustrated in fig 2, will have floating ring with viscous fluid around it. During vibrations the viscous fluid will dampen the vibrations of the floating ring. In case of spring damper as illustrated in fig 3, fixed springs are mounted in the floating ring. During vibrations the floating ring will hit the fixed spring and vibrations will be absorbed by the spring.
[006] From the above illustrations and description, it is observed that the response time to dampen the vibration is very high and vibration damping capacity is limited in conventional dampers. The above problems can be overcome by adopting a system for electronic control of engine vibrations using piezo electric material in torsional vibration damper.

OBJECT OF THE INVENTION
[007] Main object of the present invention is to control of engine vibrations electronically using piezo electric material in torsional vibration damper.
[008] Another object of the present invention is to provide a system for controlling the engine vibrations accurately and with minimal response time.
[009] Another object of the present invention is to provide a system to absorb the vibrations by the Piezo Electric material and measure the current produced to monitor and control the vibration in real-time.
[0010] Some object of the present invention is continuous and real time monitoring of Torsional Vibration in the engine.

SUMMARY
[0011] Before the present system and method are 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 system for electronic control of engine vibrations using piezo electric material in torsional vibration damper 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.
[0012] The present invention discloses a system for electronic control of engine vibrations using piezo electric material in torsional vibration damper. Torsional vibrations are angular vibrations of an object, typically a shaft along its axis of rotation and are of importance whenever power needs to be transmitted using a rotating shaft or crankshaft coupled with flywheel and vibration damper. Uncontrolled torsional vibration will lead to power train damage in engine. Every power train in the engine is coupled with flywheel at rear and vibration damper in front. This invention consists of vibration damper with piezo electric material to control the torsional vibrations. The piezo electric material absorbs the vibrations and produces an electric current equivalent to the vibrations. The current produced can be measured in order to monitor and control the vibrations.

BRIEF DESCRIPTION OF THE DRAWINGS
[0013] 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 example constructions of the disclosure, however, the disclosure is not limited to the specific methods and apparatus disclosed in the document and the drawing
[0014] 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
[0015] Figure 1 illustrates a system for electronic control of engine vibrations using piezo electric material in torsional vibration damper.
[0016] Figure 2 illustrates a torsional vibration damper with viscous fluid.
[0017] Figure 3 illustrates a torsional vibration damper with springs.
DETAILED DESCRIPTION
[0018] 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.
[0019] 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.
[0020] Torsional vibrations are angular vibrations of an object, typically a shaft along its axis of rotation and are of importance whenever power needs to be transmitted using a rotating shaft or crankshaft coupled with flywheel and vibration damper. Uncontrolled torsional vibration will lead to power train damage in engine. Every power train in the engine is coupled with flywheel at rear and vibration damper in front. This invention consists of vibration damper with piezo electric material to control the torsional vibrations. Conventional dampers are filled with high viscous fluid or damping springs to control the vibrations. The advantage of this piezo electric material over conventional material is accuracy and minimal response time. This system can be used to control vibrations in compression ignition engine, spark ignition engine, CNC machines and other rotary machines.
[0021] As illustrated in fig 1, the torsional vibration damper using Piezo Electric material consists of a fixed outer ring (1), a floating inner ring (2) and a piezo electric material (3). The piezo electric material (3) is mounted inside the floating ring.
[0022] The working principle of torsional vibration damper using Piezo Electric material is illustrated in fig 1. The floating inner ring (2) hits the fixed Piezo Electric material (3) during vibration. These vibrations are absorbed by the Piezo electric material (3). The input for the piezo electric material (3) is vibrations and output is electric current. This electric current is measured by the electric current output (4) and based on the value of the current the vibrations can be monitored and controlled. Hence, online monitoring and controlling of torsional vibrations in the engine is possible with this invention.
[0023] A system for electronic control of engine vibrations using piezo electric material in torsional vibration damper comprises of a piezo electric material (3) configured to absorb the vibrations from the floating inner ring (2). The piezo electric material (3) is configured to generate an electric current based on the vibrations from the floating inner ring (2). An electric current output (4) is configured to measure the electric current generated by the piezo electric material (3). The electric current measured by the electric current output (4) is configured to monitor and control the vibrations of the torsional damper. The electric current output (4) is configured to monitor and control the real time vibrations of the torsional damper.
[0024] Exemplary embodiments discussed above may provide certain advantages. Though not required to practice aspects of the disclosure, these advantages may include those provided by the following features.
[0025] Some object of the present invention is to control of engine vibrations electronically using piezo electric material in torsional vibration damper.
[0026] Some object of the present invention is to provide a system for controlling the engine vibrations accurately and with minimal response time.
[0027] Some object of the present invention is to provide a system to absorb the vibrations by the Piezo Electric material and measure the current produced to monitor and control the vibration in real-time.
[0028] Some object of the present invention is continuous and real time monitoring of Torsional Vibration in the engine.
[0029] REFERRAL NUMERALS
Element Description Reference Numeral
Fixed outer ring 1
Floating inner ring 2
Piezo electric material 3
Electric current output 4
Viscous fluid 5
Fixed springs 6

,CLAIMS:
1. A system for electronic control of engine vibrations using piezo electric material in torsional vibration damper comprising:
a fixed outer ring (1) configured to house the system;
a floating inner ring (2) configured to move in a translatory motion; and
plurality of piezo electric material (3) configured to be mounted inside the floating inner ring (2).
2. The system for electronic control of engine vibrations using piezo electric material in torsional vibration damper as claimed in claim 1 wherein said, piezo electric material (3) is configured to absorb the vibrations from the floating inner ring (2).
3. The system for electronic control of engine vibrations using piezo electric material in torsional vibration damper as claimed in claim 1 wherein said, piezo electric material (3) is configured to generate an electric current based on the vibrations from the floating inner ring (2).
4. The system for electronic control of engine vibrations using piezo electric material in torsional vibration damper as claimed in claim 1 wherein, an electric current output (4) is configured to measure the electric current generated by the piezo electric material (3).
5. The system for electronic control of engine vibrations using piezo electric material in torsional vibration damper as claimed in claim 1 wherein, the electric current measured by the electric current output (4) is configured to monitor and control the vibrations of the torsional damper.
6. The system for electronic control of engine vibrations using piezo electric material in torsional vibration damper as claimed in claim 1 wherein, the electric current output (4) is configured to monitor and control the real time vibrations of the torsional damper.