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A System And A Method For Balancing Of Reciprocating Machines Through Electromagnetic Actuation

Abstract: The present disclosure relates to the field of balancing of reciprocating machines. The envisaged system comprises crankshaft (7) supported by hydrodynamic bearings (11) having two equal halves. The first half is mounted on the crankcase (9) while the other half is supported by the main bearing cap (8a) wherein the crankcase (9) and the main bearing cap (8a) are configured to accommodate the wire winding (13) in form of inductive coils A and B mounted respectively above and below the crankshaft (7) to generate electromagnetic forces by the coils A and B. A controlling unit (21) is configured to generate the voltage form to create the electromagnetic force through the electrically conductive coil A or coil B. The angular position and the instantaneous angular velocity of crankshaft (7) are sensed and communicated by a crank speed sensor (20) and a cam phase sensor (19) respectively, to the controlling unit (21).

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Notices, Deadlines & Correspondence

Patent Information

Application #
Filing Date
17 July 2019
Publication Number
04/2021
Publication Type
INA
Invention Field
MECHANICAL ENGINEERING
Status
Email
dewan@rkdewanmail.com
Parent Application
Patent Number
Legal Status
Grant Date
2023-11-29
Renewal Date

Applicants

MAHINDRA AND MAHINDRA LIMITED
Farm Equipment Sector, Swaraj Division, Phase IV, Industrial Area, S.A.S. Nagar (Mohali)-160055, Punjab, India

Inventors

1. BASUTKAR, Ritesh Mukesh
Farm Equipment Sector, Swaraj Division, Phase IV, Industrial Area, S.A.S. Nagar (Mohali) – 160055, India

Specification

The present disclosure relates to the field of balancing reciprocating machines through electromagnetic actuation. DEFINITIONS As used in the present disclosure, the following terms are generally intended to have the meaning as set forth below, except to the extent that the context in which they are used indicate otherwise. "Reciprocating machines " - The term "Reciprocating machines" hereinafter refers to the mechanisms that uses one or more reciprocating pistons to convert pressure into a rotating motion or vice versa. Examples of reciprocating machines are diesel engines, gas engines, and reciprocating compressors. "Crank train" - The term "crank train" hereinafter refers to the assembly of components of a reciprocating machine which converts linear reciprocating motion of the pistons into rotary motion. Typically, a crank train comprises a connecting rod, a crankshaft and a flywheel. "Unbalanced forces" means the forces that cause a change in the motion of an object. BACKGROUND The background information herein below relates to the present disclosure but is not necessarily prior art. Conventionally, reciprocating machines have been used to either convert reciprocating motion into rotary motion (e.g. IC engine) or rotary motion into reciprocating motion (e.g. compressors). The reciprocating parts of a reciprocating machine are piston, gudgeon pin, piston rings and connecting rods, whereas, the rotary element present in them is popularly known as crankshaft. These machines generate vibration and noise which often annoys an operator working on or nearby the machine. Presently, vehicle manufacturers are focusing largely on the operator's comfort and hence, it is important to reduce the vibrations and noise that affect the operator. Conventionally, stiffeners, dampers and masses are used to cancel out the vibrations and noise. In an automobile industry, a separate division for noise, vibration, and harshness (NVH) invests huge amount of time and money to reduce the vibrations of vehicles using one or more of the above methods. However, the main reason for vibration is the unbalanced forces generated within the automobile. There are two major sources of unbalanced forces, firstly, the centrifugal forces generated by the rotating elements like crank web, crankpin etc. and, secondly, the inertial forces due to the reciprocating parts. To counter the first type of unbalance, a quite popular methodology of attaching a counter balance on crankshaft is adopted. However, it has been quite difficult to completely balance the unbalanced forces generated due to reciprocating parts. The major concern for balancing reciprocating unbalanced forces is their fixed line of action, whereas the direction of the rotary unbalanced force changes depending upon the angle of rotation of crankshaft. On other hand, partial balancing of reciprocating forces using the counter balance on crankshaft can reduce the amplitude of force in one direction but generate another force in its normal direction, which has been the universal method in internal combustion engines to reduce hammer blow which is the maximum amplitude of the unbalanced force along the normal to the line of stroke which results in fluctuations in wheel reactions of a vehicle. Additionally, the unbalanced forces also affect the useful life of the components interlinked with the reciprocating machines. Therefore, completely balancing reciprocating forces is not possible. Hence, there is a requirement to develop a system to dampen or balance the unbalanced forces generated due to reciprocating parts of the vehicle for further improving the NVH properties of the vehicle. OBJECTS Some of the objects of the present disclosure, which at least one embodiment herein satisfies, are as follows: An object of the present disclosure is to provide a system and a method for quick and cost-effective balancing of the reciprocating machines or similar type of devices. Another object of the present disclosure is to provide a non-contact, non-movable and compact electromagnetic force generator to counter the reciprocating forces generated within the reciprocating machines or similar devices. Yet another object of the present disclosure is to provide a device to reduce the vibrations of vehicles using the electromagnetic force generator. SUMMARY The present disclosure discloses a system for balancing of reciprocating machines through electromagnetic actuation. The system comprises a crank train of reciprocating machines with pistons configured to move inside their respective cylinder liners to transfer the force to a connecting rod for driving a crank and rotating a crankshaft wherein the crankshaft is supported by bearings divided into two equal halves wherein a first half of the above bearing is mounted on the crankcase while the other half is supported by the main bearing cap. The crankcase and the main bearing cap are configured to accommodate electrically conductive wire windings in form of an inductive coil A and an inductive coil B respectively mounted above and below the crankshaft to generate the electromagnetic forces. At least one controlling unit is configured to generate a voltage form to create an electromagnetic force through either the coil A or the coil B. At least one crank speed sensor and at least one cam phase sensor are configured to sense and communicate the angular position and the instantaneous angular velocity of the crankshaft to the controlling unit respectively. In an embodiment, the electrically conductive wire winding in the form of the coil A and coil B are configured to be electrically insulated from each other to avoid the short circuit. The electrically conductive wire winding is configured to be manufactured from the electrically conductive metals wires like copper, aluminium, sliver, etc. The controlling unit are microcontrollers, processors, etc. The electrically conductive windings in form of Coil A and B are configured to be insulated from the outside using diamagnetic pads configured to provide effect of electromagnetism on the crankshaft journal and to restrain effect of electromagnetism on other ferromagnetic components of the engine. The main bearing cap is connected to the controlling unit through electrical connections and crankcase is connected to the controlling unit through electrical connections. In another embodiment, the controlling unit is configured to be operated on the battery of the vehicle. The coils A and B are provided on the plurality of slots configured on the crankcase and the main bearing cap respectively to counter a positive unbalanced force by the coil A and the negative unbalanced force to be countered by the coil B. In yet another embodiment, the crankshaft journal is configured of ferromagnetic material provided to get attracted by the magnetic field created by coil A or B. The system is configured to balance the reciprocating forces generated by the reciprocating elements of reciprocating machines. The magnitude of reciprocating unbalanced forces is configured to be calculated by the formula Frec = reciprocating force, r = crank throw, m = total mass of reciprocating elements, 5 a = instantaneous angular speed, *= crankshaft angular position, and n = ratio of length of connecting rod to crank throw. In one embodiment, at least one crank speed sensor and at least one cam phase sensor for sensing and communicating are vehicle mounted sensors. 10 In another embodiment, the controlling units are microcontrollers, processors, etc.. In yet another embodiment, the controlling unit is provided to generate the voltage form to create the electromagnetic force through the electrically conductive coil A or coil B and attract the crankshaft journal by the magnetic field created by coil A or B to counter the positive unbalanced force by the coil A and to counter the negative 15 unbalanced force by the coil B. The present disclosure also envisages a method for balancing of reciprocating machines through electromagnetic actuation. The method comprises the following steps: a. preparing a system setup; 20 b. sensing the crankshaft angular position (*) using crankshaft speed sensor or cam phase sensor; c. sensing the instantaneous angular speed (XI) of crankshaft through speed sensor; 6 d. communicating the crankshaft angular position (*) and the instantaneous angular speed (il) of crankshaft to the micro controller; e. generating voltage corresponding to F,.ec = mrtf (cas

Documents

Application Documents

# Name Date
1 201911028835-FORM 4 [18-06-2024(online)].pdf 2024-06-18
1 201911028835-STATEMENT OF UNDERTAKING (FORM 3) [17-07-2019(online)].pdf 2019-07-17
2 201911028835-REQUEST FOR EXAMINATION (FORM-18) [17-07-2019(online)].pdf 2019-07-17
2 201911028835-IntimationOfGrant29-11-2023.pdf 2023-11-29
3 201911028835-PatentCertificate29-11-2023.pdf 2023-11-29
3 201911028835-PROOF OF RIGHT [17-07-2019(online)].pdf 2019-07-17
4 201911028835-POWER OF AUTHORITY [17-07-2019(online)].pdf 2019-07-17
4 201911028835-FORM-8 [23-11-2021(online)].pdf 2021-11-23
5 201911028835-FORM 18 [17-07-2019(online)].pdf 2019-07-17
5 201911028835-FER.pdf 2021-10-18
6 201911028835-FORM 1 [17-07-2019(online)].pdf 2019-07-17
6 201911028835-FER_SER_REPLY [17-09-2021(online)].pdf 2021-09-17
7 abstract.jpg 2019-08-23
7 201911028835-DRAWINGS [17-07-2019(online)].pdf 2019-07-17
8 201911028835-DECLARATION OF INVENTORSHIP (FORM 5) [17-07-2019(online)].pdf 2019-07-17
8 201911028835-COMPLETE SPECIFICATION [17-07-2019(online)].pdf 2019-07-17
9 201911028835-DECLARATION OF INVENTORSHIP (FORM 5) [17-07-2019(online)].pdf 2019-07-17
9 201911028835-COMPLETE SPECIFICATION [17-07-2019(online)].pdf 2019-07-17
10 201911028835-DRAWINGS [17-07-2019(online)].pdf 2019-07-17
10 abstract.jpg 2019-08-23
11 201911028835-FORM 1 [17-07-2019(online)].pdf 2019-07-17
11 201911028835-FER_SER_REPLY [17-09-2021(online)].pdf 2021-09-17
12 201911028835-FORM 18 [17-07-2019(online)].pdf 2019-07-17
12 201911028835-FER.pdf 2021-10-18
13 201911028835-POWER OF AUTHORITY [17-07-2019(online)].pdf 2019-07-17
13 201911028835-FORM-8 [23-11-2021(online)].pdf 2021-11-23
14 201911028835-PatentCertificate29-11-2023.pdf 2023-11-29
15 201911028835-IntimationOfGrant29-11-2023.pdf 2023-11-29
16 201911028835-FORM 4 [18-06-2024(online)].pdf 2024-06-18

Search Strategy

1 ff201911028835E_25-02-2021.pdf

ERegister / Renewals

3rd: 18 Jun 2024

From 17/07/2021 - To 17/07/2022

4th: 18 Jun 2024

From 17/07/2022 - To 17/07/2023

5th: 18 Jun 2024

From 17/07/2023 - To 17/07/2024

6th: 18 Jun 2024

From 17/07/2024 - To 17/07/2025

7th: 04 Jul 2025

From 17/07/2025 - To 17/07/2026