F O R M 2

THE PATENTS ACT, 1970
(39 of 1970)
COMPLETE SPECIFICATION
(See section 10; rule 13)

1. TITLE OF THE INVENTION

CONTROL SYSTEM AND METHOD FOR MODULATING FUELING OF ENGINES WITH BIOGAS

2. APPLICANTS
a. Name: Race Dynamics India Pvt. Ltd.
b. Nationality: India
c. Address: 97/A Chikayellappa Industrial Estate, Jakkasandra, Koramangla 1st Block, Bangalore 560034, INDIA

Complete specification:
The following specification particularly describes the invention and the manner in which it is to be performed.
BACKGROUND
Field
[0001] This application relates generally to the field of biogas and, more particularly but not exclusively, to fueling engines using biogas.
Discussion of related field
[0002] Typically, biogas refers to gas produced by biological breakdown of organic matter. Organic matter that is biodegradable is used for generating biogas. Biodegradable matter that is generally used for biogas generation include, but are not limited to, food scraps, faeces, biomass, manure, sewage, municipal waste, green waste and energy crops. Biodegradable matter is subjected to anaerobic digestion/fermentation or gasification to generate biogas. Subjecting biodegradable matter to anaerobic digestion or fermentation, results primarily in, generation of methane and carbon dioxide as by products. Likewise, subjecting suitable biodegradable matter to gasification, results primarily in, generation of nitrogen, hydrogen, and carbon monoxide as by products. These gases that are generated as by products can be combusted or oxidized with oxygen; hence, biogas can be used as fuel.
[0003] The advantages of generating and using biogas are manifold. Prices of conventional oil continue to increase and it is also becoming scarcer by the day. In light of increasing prices and scarcity, using biogas is a convenient and environmentally friendly option. Further, by trapping gases from organic matter, one can prevent methane from reaching the atmosphere, thereby reducing degradation caused by methane gas. Additionally, generating biogas by processing organic matter is also an efficient and economic approach to address issues like sewage treatment, ensuring that raw sewage is not released into the natural environment.
[0004] Such advantages of generating and using biogas have motivated many to use biogas as formidable source of energy for several applications. For example, biogas is being used, for producing heat by combustion, generating electric power by combustion in engines, generating electric power by application in turbine or micro-turbine, as a substitute for CNG, and as a direct fuel for domestic cooking, among other applications.
[0005] It is observed that, while several applications of biogas have been exploited, mechanisms to use biogas efficiently are underdeveloped. To illustrate underdeveloped mechanisms for efficiently using biogas, one may consider mechanism used to feed biogas to engines that are employed for electric power generation.
[0006] Biogas is fed to engines that are employed for electric power generation. The amount of biogas that is fed to the engine is moderated by a tap or a mechanical valve. The tap or the valve is opened to a desired extent to allow a predefined quantity of biogas to be fed to the engine. The extent to which the tap or the valve has to be kept open is predetermined based on factors such as engine specification and load. However, it shall be noted that, factors such as load, power demand, certain engine parameters, parameters corresponding to biogas may vary over time. Such variations are not accounted for, and the biogas is fed at a constant predefined rate. Further, if one wishes to change the biogas supply rate based on changed operating parameters, human intervention is required to, determine the extent to which supply rate has to be changed and operate the tap/valve to bring about the desired change. Furthermore, usage of such mechanical controls to moderate biogas supply is found to be less efficient. As a result of at least the aforementioned issue, the engine is operated at lower efficiency, thereby resulting in higher consumption of biogas for the work done.
[0007] It shall be noted that even though biogas is generally produced using waste material, it should be accounted for in the same way as we would in case of fossil fuel. Failure to use biogas efficiently will lead to increased dependence on conventional/fossil fuels, which is undesirable.
[0008] In light of the foregoing discussion, a technique for using biogas more efficiently is desired. Further, a technique, which ensures that engines are fuelled with precise quantities of biogas to enable the engines to operate at enhanced efficiency is desired. Furthermore, a technique that moderates supply of bio fuel to engines more efficiently as compared to mechanical controls is desired.

STATEMENT OF INVENTION
[0009] Accordingly the invention provides a control system for modulating fueling of an engine with biogas. The control system comprises a data processing and decision module. The data processing and decision module is configured to receive data corresponding to the engine specification; receive data corresponding to range of parameters at which the engine is desired to operate; and receive data corresponding to crankshaft position, camshaft position and engine load from an engine system. Thereafter, the data processing and decision module processes data corresponding to, the engine specification, the range of parameters at which the engine is desired to operate, crankshaft position, camshaft position and engine load. Based on processing, the data processing and decision module generates instructions for modulating fueling and communicates the generated instructions to the engine system.
[0010] There is also provided a method for modulating fueling of engine with biogas. The method comprises receiving data corresponding to the engine specification; receiving data corresponding to range of parameters at which the engine is desired to operate; and receiving data corresponding to crankshaft position, camshaft position and engine load from an engine system. The method further includes, processing data corresponding to, the engine specification, the range of parameters at which the engine is desired to operate, crankshaft position, camshaft position and engine load, wherein the processing is carried out by a control system. Furthermore, the method includes, generating instructions for modulating the fueling of the engine based on the processing and communicating generated instructions to the engine system.
[0011] The statement of invention is provided to introduce a selection of concepts in a simplified form that are further described below in the Detailed Description. The statement of invention is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.
[0012] These and other advantages of the present invention will be clarified in the description of the embodiments taken together with the attached drawings in which like reference numerals represent like elements throughout.

BRIEF DESCRIPTION OF DRAWINGS
[0013] Embodiments are illustrated by way of example and not limitation in the Figures of the accompanying drawings, in which like references indicate similar elements and in which:
[0014] FIG. 1 illustrates a block diagram of an engine system 100, in accordance with an embodiment;
[0015] FIG. 2 a block diagram illustrating the control system 202 configured with the engine system 100, in accordance with an embodiment;
[0016] FIG. 3 a block diagram illustrating components of the control system 202, in accordance with an embodiment;
[0017] FIG. 4 is a flow chart illustrating a method for modulating fueling of the engine 102 with biogas, in accordance with an embodiment;
[0018] FIG. 5 is a flow chart illustrating a method for modulating fueling of the engine 102 with biogas, in accordance with an embodiment; and
[0019] FIG. 6 is a flow chart illustrating a method for modulating fueling of the engine 102 with biogas, in accordance with an embodiment.

DETAILED DESCRIPTION
[0020] The following detailed description includes references to the accompanying drawings, which form a part of the detailed description. The drawings show illustrations in accordance with example embodiments. These example embodiments, which are also referred to herein as “examples,” are described in enough detail to enable those skilled in the art to practice the present subject matter. The embodiments can be combined, other embodiments can be utilized, or structural, logical, and electrical changes can be made without departing from the scope of what is claimed. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope is defined by the appended claims and their equivalents.
[0021] In this document, the terms “a” or “an” are used, as is common in patent documents, to include one or more than one. In this document, the term “or” is used to refer to a nonexclusive “or,” such that “A or B” includes “A but not B,” “B but not A,” and “A and B,” unless otherwise indicated.
[0022] Further, before the embodiments are described in further detail, it is also to be understood that the terminology used herein is for the purpose of describing particular embodiments only, and is not intended to be limiting, since the scope of the present invention will be limited only by the appended claims. Furthermore, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Although any methods and materials similar or equivalent to those described herein can also be used in the practice or testing of the present invention, a limited number of the exemplary methods and materials are described herein.
[0023] Embodiments describe a control system and a method for controlling fueling of engine with biogas. The control system and the method are intended to control fueling to enhance the efficiency of engines which are fueled with biogas. It shall be noted that embodiments are described using certain types of engines that are configured to be fueled with biogas. However, a person skilled in the art would appreciate the fact that modifications can be made to the control system and method to suite engines that are configured to be fueled by engines. Examples of engines that can be configured to be fueled by biogas include, but are not limited to, conventional reciprocating piston engine, V-engine, trunk engine, vertical engine, steeple engine, inclined frame engine, oscillating engine, corliss frame or girder engine, horizontal engine, radial engine, beam engine, self contained horizontal engine, inclined cylinder engine, double cylinder with cranks opposite or at 180°, three cylinder engine with cranks at 120°, compound woolf engine with cranks together, compound woolf engine with cranks opposite or at 180°, compound tandem engine with receiver, compound engine with cylinders side by side and cranks at 90°, triple expansion engine: cylinders side by side and cranks at 120°, and triple expansion engine: semi-tandem - Two Cranks at 90°.
[0024] FIG. 1 illustrates a block diagram of an engine system 100, in accordance with an embodiment. In FIG. 1, block 102 represents an engine. The engine 102, for example, can be an internal combustion engine that can be of the reciprocating or non-reciprocating type. The engine 102 is configured to be fueled by biogas. The biogas that is used for fueling the engine 102 is stored in fuel tank 104. It shall be noted that the fuel tank 104 can be configured with a pump. The pump enables fuel to be supplied at desired pressure. The fuel from the fuel pump is supplied to an injector solenoid 106. It shall be noted that fuel pump is configured with the fuel tank 104 when supply of biogas at higher pressure to the engine 102 is desired. Thereafter, the fuel from the injector solenoid 106 is supplied to an intake port 108. Subsequently, moderated quantity of biogas is fed into the engine 102 from the intake port 108. The biogas supplied to the engine 102 is combusted in the engine 102. The energy released by combustion can be used in several applications by connecting the engine output element 110, such as a shaft, to desired means. For example, the engine output element 110 can be connected to a generator that enables generation of electric power. Alternatively, the engine output element 110 can be connected to a transmission, which in turn is connected to a desired means based on the application. The engine 102 and other elements are configured with parameter determination modules to enable the control system to control fueling of engine 102 with biogas, in order to enhance the efficiency of the engine 102, which is fueled with biogas.
[0025] As illustrated in FIG. 1, engine 102 is configured with biogas parameters determination module 112, input parameters determination module 114, engine parameters determination module 116 and engine output parameters determination module 118. It shall be noted that each of these modules can include means, such as, sensors, which are known in the art, to gather data corresponding to the parameters that they are configured to measure.
[0026] The biogas parameters determination module 112 is configured to gather data corresponding to one or more parameters that include, but are not limited to, biogas pressure, biogas composition, and biogas temperature.
[0027] The input parameters determination module 114 is configured to gather data corresponding to one or more parameters that include, but are not limited to, manifold air pressure, air temperature, engine load and altitude.
[0028] The engine parameters determination module 116 is configured to gather data corresponding to parameters one or more that include, but are not limited to, engine temperature, crank position sensor and cam position sensor.
[0029] The engine output parameters determination module 118 is configured to gather data corresponding to one or more parameters that include, but are not limited to, exhaust gas composition, engine horsepower, torque curve, engine RPM, air to fuel ratio, exhaust gas temperature, combustion temperature, combustion pressure, torque and load
[0030] The data gathered by the aforementioned modules is communicated to the control system. The control system can use all the data or part of the data to control fueling of engine 102 with biogas to enhance the efficiency of the engine 102 and output torque, among other parameters.
[0031] FIG. 2 a block diagram illustrating the control system 202 configured with the engine system 100, in accordance with an embodiment, and FIG. 3 a block diagram illustrating components of the control system 202, in accordance with an embodiment. The control system 202 received data from the engine system 100. Thereafter, the control system uses at least a part of the received data to modulate fueling of engine 102 with biogas. It shall be noted that, modulating fueling of the engine 102 with biogas can include, one or more of, but not limited to, modulating quantity of biogas to be supplied to the engine, time of delivery of biogas to the engine, quantity of air to be supplied to the engine and timings at which the biogas and air mixture has to be ignited. The data is used by the control system 202 to modulate one or more of, quantity of fuel to be supplied to the engine 102, time of delivery of biogas to the engine 102, quantity of air to be supplied to the engine 102 and position of crank (also referred to as timing) at which the air-biogas mixture has to be ignited. By modulating one or more of biogas quantity, biogas delivery timing, air quantity and ignition timing, the control system enhances the efficiency of the engine 102, exhaust gas temperature and output torque, among other parameters.
[0032] In an embodiment, the control system 202 includes a data collection module 302, a data processing and decision module 304 and a communication module 306. The data collection module 302 is configured to collect and store data received from the engine system 100. In an embodiment, the data collection module 302 includes memory means that is configured to store the received data for a predetermined period of time. The data stored in the data collection module 302 can be used for diagnosing the engine system 100, and in some case the data can be used to determine the accuracy with which the control system 202 is modulating the fueling of engine 102. It may be further noted that, the data collection module 302 can be configured to store the instructions generated by the control module 202 to modulate fueling of the engine 102. Furthermore, the data collection module 302 can be configured to store instructions generated by the control module 202 to modulate fueling and the corresponding engine system 100 parameters as a result of such modulation.
[0033] In an embodiment, the data processing and decision module 304 is configured to fetch data from the data collection module 302. The data processing and decision module 304 uses the data fetched from the data collection module 302 to generate instructions to modulate fueling of the engine 102. It shall be noted that the data processing and decision module 304 may use the complete data stored in the data collection module 302 or a part of the data stored in the data collection module 302. Further, the data processing and decision module 304 can be configured to use past (historical data) data along with data that is collected relatively freshly to refine instructions that are generated to modulate fueling. It shall be additionally noted that data processing and decision module 304 is configured to use data received from the engine system 100 and data corresponding to engine specification to generate instructions to enable modulation. Furthermore, the control system 202 can be fed with data corresponding to desired ranges of parameters within which the engine has to be operated (example: ranges of rpm, exhaust gas temperature etc) for enhanced target parameters, such as, efficiency, exhaust gas temperature and output torque, among other parameters. The control system 202 uses such data corresponding to desired ranges along with data gathered from engine system 100 to generate instructions to modulate fueling of engine 102.
[0034] In an embodiment, the communication module 306 is configured to communicate data corresponding to engine system 100 to the users and vice-versa. The communication module 306 can be a display system or an input device. Additionally, or alternatively, the communication module 306 is configured to communicate data corresponding to engine system 100 to a remote location. A user can utilize the data communicated by the communication system 306 to take appropriate decisions.
[0035] The control system 202 can be configured to utilize data, at least as earlier iterated, to modulate fueling of the engine 102 with biogas, to enhance target parameters, such as, efficiency of the engine 202, exhaust gas temperature and output torque, among other parameters. FIG. 4 is a flow chart illustrating a method for modulating fueling of the engine 102 with biogas, in accordance with an embodiment. At step 402, the control system 202 receives the data corresponding to the engine specification. For example, the data may include one or more of data corresponding to parameters that include, but not limited to, engine volumetric efficiency, bore, stroke, valve timing and lift. This data can be communicated to the control system 202 when the control system 202 is configured to work with the engine 102. It shall be noted that this instant data depends on the type of engine with which the control system 202 is engaged. In an embodiment, this data can be stored in the data collection module 302. In addition to receiving data corresponding to engine specification, at step 404, the control system 202 receives data corresponding to the range of parameters at which the engine 102 is desired to operate. For example the desired range of parameters can be operating the engine at 3000 RPM, additionally or alternatively maintaining exhaust temperature in the range of 400 degree Fahrenheit to 600 degree Fahrenheit. In light of this specification, a person skilled in the art will appreciate the fact that various other desired ranges of parameters can be communicated to the control system 202. Furthermore at step 406, the control system receives data from engine system 100 that is required to modulate fueling. In an embodiment data corresponding to crankshaft position, camshaft position and engine load is retrieved by the control system 202. The control system processes the aforementioned data at step 408. In an embodiment the data processing and decision module 304 processes the data at step 408. As a result of processing data modulation that is desired to operate the engine 102 within desired range of parameters is determined and corresponding instructions for modulating fueling are generated at steps 410 and 412 respectively. The determined modulation can include one or more of, quantity of biogas to be supplied to the engine 102, time of delivery of biogas to the engine 102, quantity of air to be supplied to 102 and timing at which the fuel and air mixture has to be ignited. The generated instructions are communicated to appropriate elements within the engine system and in some cases to elements beyond the engine system 100. For example, the instructions corresponding to the quantity of air to be supplied to the engine 102 is communicated to an electronic throttle controller. The electronic throttle controller is a device that controls the quantity of air flow into the engine 102. The electronic throttle controller can be configured with valves, such as butterfly valve, slider valve, etc, that allows flow of air into the engine.
[0036] FIG. 5 is a flow chart illustrating a method for modulating fueling of the engine 102 with biogas, in accordance with an embodiment. At step 502, the control system 202 receives the data corresponding to the engine specification. For example, the data may include one or more of data corresponding to parameters that include, but not limited to, engine volumetric efficiency, bore, stroke, valve timing and lift. This data can be communicated to the control system 202 when the control system 202 is configured to work with the engine 102. It shall be noted that this instant data depends on the type of engine with which the control system 202 is engaged. In an embodiment, this data can be stored in the data collection module 302. In addition to receiving data corresponding to engine specification, at step 504, the control system 202 receives data corresponding to the range of parameters at which the engine 102 is desired to operate. For example the desired range of parameters can be operating the engine at 3000 RPM, additionally or alternatively maintaining exhaust temperature in the range of 500 degree Fahrenheit to 600 degree Fahrenheit. In light of this specification, a person skilled in the art will appreciate the fact that various other desired ranges of parameters can be communicated to the control system 202. Furthermore at step 506, the control system receives data from engine system 100 that is required to modulate fueling. In an embodiment, the control system 202 retrieves data in addition to data corresponding to crankshaft position, camshaft position and engine load. The control system retrieves data corresponding to temperature of engine 102, air temperature, manifold air pressure, exhaust air fuel ration, biogas pressure, biogas temperature and biogas composition. The control system processes the aforementioned data at step 508. In an embodiment the data processing and decision module 304 processes the data at step 508. As a result of processing data modulation that is desired to operate the engine 102 within desired range of parameters is determined and corresponding instructions for modulating fueling are generated at steps 510 and 512 respectively. The determined modulation can include one or more of quantity of biogas to be supplied to the engine 102, time of delivery of biogas to the engine 102, quantity of air to be supplied to 102 and timing at which the fuel and air mixture has to be ignited. The generated instructions are communicated to appropriate elements within the engine system and in some cases to elements beyond the engine system 100. For example, the instructions corresponding to the quantity of air to be supplied to the engine 102 is communicated to an electronic throttle controller. The electronic throttle controller is a device that controls the quantity of air flow into the engine 102. The electronic throttle controller can be configured with valves, such as butterfly valve, slider valve, etc, that allows flow of air into the engine.
[0037] FIG. 6 is a flow chart illustrating a method for modulating fueling of the engine 102 with biogas, in accordance with an embodiment. At step 602, the control system 202 receives the data corresponding to the engine specification. For example, the data may include one or more of data corresponding to parameters that include, but not limited to, engine volumetric efficiency, bore, stroke, valve timing and lift. This data can be communicated to the control system 202 when the control system 202 is configured to work with the engine 102. It shall be noted that this instant data depends on the type of engine with which the control system 202 is engaged. In an embodiment, this data can be stored in the data collection module 302. In addition to receiving data corresponding to engine specification, at step 604, the control system 202 receives data corresponding to the range of parameters at which the engine 102 is desired to operate. For example the desired range of parameters can be operating the engine at 3000 RPM, additionally or alternatively maintaining exhaust temperature in the range of 600 degree Fahrenheit to 600 degree Fahrenheit. In light of this specification, a person skilled in the art will appreciate the fact that various other desired ranges of parameters can be communicated to the control system 202. Furthermore at step 606, the control system 202 retrieves data in addition to data corresponding to crankshaft position, camshaft position, engine load, temperature of engine 102, air temperature, manifold air pressure, exhaust air fuel ration, biogas pressure, biogas temperature and biogas composition. The control system 202 retrieves data corresponding to exhaust gas composition, engine exhaust temperature, combustion temperature, combustion pressure, load, torque. The control system 202 processes the aforementioned data at step 608. In an embodiment the data processing and decision module 304 processes the data at step 608. As a result of processing data modulation that is desired to operate the engine 102 within desired range of parameters is determined and corresponding instructions for modulating fueling are generated at steps 610 and 612 respectively. The determined modulation can include one or more of, quantity of fuel to be supplied to the engine 102, time of delivery of biogas to the engine 102, quantity of air to be supplied to 102 and timing at which the fuel and air mixture has to be ignited. The generated instructions are communicated to appropriate elements within the engine system and in some cases to elements beyond the engine system 100. For example, the instructions corresponding to the quantity of air to be supplied to the engine 102 is communicated to an electronic throttle controller. The electronic throttle controller is a device that controls the quantity of air flow into the engine 102. The electronic throttle controller can be configured with valves, such as butterfly valve, slider valve, ect, that allows flow of air into the engine. It shall be noted that in this instant module, collection of output data, such as, data corresponding to exhaust gas composition, engine exhaust temperature, combustion temperature, combustion pressure, load and torque, enables modulating fueling using closed loop feedback. In other words, the control system 202 will be capable of determining if the instructions provided to the engine system 100 has the desired effect on the engine 102. Based on the determination made using closed loop feedback, the control system 202 can refine the instructions sent to the engine system to ensure the engine 102 operates within the desired range of parameters.
[0038] In an embodiment, the control system 202 in addition to using data as iterated in description corresponding to the figures 4 to 6, the control system 202 can use historical data to refine the instructions communicated to the engine system 100.
[0039] While the method/process described above and illustrated in the drawings is shown as a sequence of steps, this was done solely for the sake of illustration. Accordingly, it is contemplated that some steps may be added, some steps may be omitted, the order of the steps may be re-arranged, and/or some steps may be performed simultaneously.
[0040] It shall be noted that FIG. 1 illustrates an engine system 100 that includes engine 102, which may be a spark ignition engine. However, the control system can be configured to work with other types of engines, such as, compression ignition engines. In case of compression ignition engine the biogas from the fuel tank is fed into a high pressure pump. The high pressure pump pressurizes the biogas, which is injected at high pressure into the combustion chamber.
[0041] Further, it shall be noted that FIG. 1 illustrates an engine system 100 that includes engine 102, which may be a port-injected spark ignition engine. However, the control system can be configured to work with other types of engine configurations , such as, direct combustion chamber injected spark ignition engine. In this case, the biogas from the fuel tank is fed into a high pressure pump. The high pressure pump pressurizes the biogas, which is injected at high pressure into the combustion chamber.
[0042] In an embodiment the engine may include more than one spark plug. In cases where there is more than one spark plug, the control system 202 provides instructions corresponding to the timing at which the spark plugs have to ignite the biogas and air mixture.
[0043] In light of the foregoing description, it is clear that the disclosed system and method ensures that biogas is used more efficiently. Further, the disclosed system and technique ensures that engines fueled with biogas are operated at enhanced target parameters, such as, efficiency, exhaust gas temperature and output torque, among other parameters. Furthermore, the system and method enables supply of precise quantities of biogas and air to ensure that the engines operate at enhanced efficiency. Additionally, ignition of biogas and air mixture is precisely timed to ensure that the engines operate at enhanced efficiency is desired.
[0044] The example embodiments described herein may be implemented in an operating environment comprising software installed in hardware, or in a combination of software and hardware.
[0045] Although embodiments have been described with reference to specific example embodiments, it will be evident that various modifications and changes may be made to these embodiments without departing from the broader spirit and scope of the system and method described herein. Accordingly, the specification and drawings are to be regarded in an illustrative rather than a restrictive sense.
[0046] Many alterations and modifications of the present invention will no doubt become apparent to a person of ordinary skill in the art after having read the foregoing description. It is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation. It is to be understood that the description above contains many specifications, these should not be construed as limiting the scope of the invention but as merely providing illustrations of some of the personally preferred embodiments of this invention. Thus the scope of the invention should be determined by the appended claims and their legal equivalents rather than by the examples given.

I claim:

1. A control system for modulating fueling of an engine with biogas, the control system comprises:
a data processing and decision module, where in the data processing and decision module is configured to:
receive data corresponding to the engine specification;
receive data corresponding to range of parameters at which the engine is desired to operate;
receive data corresponding to crankshaft position, camshaft position and engine load from an engine system;
processes data corresponding to, the engine specification, the range of parameters at which the engine is desired to operate, crankshaft position, camshaft position and engine load;
generate instructions for modulating the fueling of the engine based on processing; and
communicate generated instructions to the engine system.

2. The control system according to claim 1, wherein the generated instruction is corresponding to at least one of, quantity of biogas to be supplied to the engine, time of delivery of biogas to the engine, quantity of air to be supplied to the engine and timings at which the biogas and air mixture has to be ignited.

3. The control system according to claim 1, wherein the control system is further configured to receive data corresponding to at least one of, temperature of the engine, air temperature, manifold air pressure, exhaust air fuel ration, biogas pressure, biogas temperature and biogas composition.

4. The control system according to claim 3, wherein the control system is further configured to receive data corresponding to at least one of, exhaust gas composition, engine exhaust temperature, combustion temperature, combustion pressure, load and torque.

5. The control system according to claim 4, wherein the control system is further configured to utilize at least a part of the received data for closed loop feedback to refine the instructions generated for modulating the fueling of the engine.

6. The control system according to claim 1, wherein the control system is further configured to receive historical data to refine the instructions generated for modulating the fueling of the engine.

7. The control system according to claim 1, wherein the control system is further configured to communicate data corresponding to the engine system to a user.

8. A method for modulating fueling of engine with biogas, the method comprises:
receiving data corresponding to the engine specification;
receiving data corresponding to range of parameters at which the engine is desired to operate;
receiving data corresponding to crankshaft position, camshaft position and engine load from an engine system;
processing data corresponding to, the engine specification, the range of parameters at which the engine is desired to operate, crankshaft position, camshaft position and engine load, wherein the processing is carried out by a control system;
generating instructions for modulating the fueling of the engine based on the processing; and
communicating generated instructions to the engine system.

9. The method according to claim 8, wherein the generating instructions comprises, generating at least one of:
instruction corresponding to quantity of biogas to be supplied to the engine;
instruction corresponding to time of delivery of biogas to the engine,
instruction corresponding to quantity of air to be supplied to the engine; and
instruction corresponding to timings at which the biogas and air mixture has to be ignited.

10. The method according to claim 8, wherein the method further comprises, receiving data corresponding to at least one of, temperature of the engine, air temperature, manifold air pressure, exhaust air fuel ration, biogas pressure, biogas temperature and biogas composition.

11. The method according to claim 10, wherein the method further comprises, receiving data corresponding to at least one of, exhaust gas composition, engine exhaust temperature, combustion temperature, combustion pressure, load and torque.

12. The method according to claim 11, wherein the method further comprises utilizing at least a part of the received data for closed loop feedback to refine the instructions generated for modulating the fueling of the engine.

13. The method according to claim 8, wherein the method further comprises receiving historical data to refine the instructions generated for modulating the fueling of the engine.

14. The method according to claim 8, wherein the method further comprises communicating data corresponding to the engine system to a user.

15. A control system for modulating fueling of engine with biogas as herein above described in the specification with reference to the figures.

16. A modulating fueling of engine with biogas as herein above described in the specification with reference to the figures.