Description:A METHOD AND A SYSTEM FOR ENHANCING A FUEL ADAPTATION IN A VEHICLE
[0001] The present subject matter, in general, relates to the field of an internal combustion engine, in particular, the present subject matter relates to a method and a system for enhancing a fuel adaptation in a vehicle.
BACKGROUND

[0002] Traditionally, in the existing systems, if there is presence of an adulterated fuel (gasoline / CNG) in the vehicle or there is hardware issue in vehicle, then the Electronic Communication Unit (ECU) is not to apply a required fuel as per desired stoichiometry, under the situations when fuel feedback is inhibited , the current fuel adaptation system is not able to correctly adapt to the variations being observed in actual fuelling with respect to the target stoichiometry in areas where the O2 feedback is not considered by the ECU, i.e., fuel feedback (fbk) is OFF, which indicates O2/lambda sensor response is either inhibited or made redundant to be used by the ECU. The fuel feedback off happens when sudden accelerator pedal variation due to accelerator pedal release /off position to accelerator pedal deep pressed /on position happens at same gear engagement /disengaged scenario . The fuel feedback off also happens when fuel cut on and fuel cut off events occur during gear shifts to propel the vehicle at different speeds . the event of gear shifts are synchronised with the accelerator pedal movement leading to pedal off or on position, there by leading to fuel cut on or off.
[0003] Post completion of every long/ short event of the said fuel cut, for a specified duration of time, the ECU provides excess fuel to neutralize the catalyst, thus during this duration the said fuel cut on becomes fuel cut off ,for reinitiating fuelling as per the ECU demand, thus this event of reinitiating fuelling as per the ECU demand during the event of fuel cut off is also referred to as the event of post fuel cut revival, during the event of the said fuel cut on to fuel cut off the said ECU does not use the O2/lambda sensor feedbackas the system becomes lean due to absence of fuel in exhaust gas. Thus, during this time of feedback off to on post the event of fuel cut on to off during gear change or accelerator pedal variation , the EMS is not able to understand the correct state of system stoichiometry, and hence cannot estimate and apply the exact fuel adaptation during the state of the said fuel cut revival required by the ECU , thus the fuelling becomes abnormally lean/rich with respect to the desired stoichiometry and the fuelling there by impacts the vehicle drivability along with higher tail pipe emission of a vehicle.
[0004] Furthermore, after an event of a bad fuel filling in a bi-fuel/gasoline vehicular application or an injector or an engine hardware issue in the vehicle , the bad fuel property/poor engine hardware performance, leads to make the system prepare leaner /richer air fuel mixture with respect to the target air fuel ratio /stichometry leading to a big gap in actual fuelling versus desired fuelling, that may require a very high correcting in fuel adaptation to be applied by ECU (e.g. 20% etc.) or more. This gap of desired fuelling versus actual fuelling is easily understood by the ECU while operating in a close loop when O2/lambda sensor feedback is ON. But the ECU is not able to understand the gap in the areas where Feedback is OFF, when the vehicle moderates between the zone of fuel feedback OFF (or Fuel cut on) and feedback ON (or Fuel cut off) and feedback OFF (or Fuel cut on) while the vehicle is experiencing an abnormal variation in fuel adaptation due to Poor hardware performance or bad fuel, there may abnormally be a misfire in system leading to poor drivability and high tail pipe emissions.
[0005] Fig. 1a illustrates a graphical representation 100a depicting a nitrogen oxide (NOx) emission (ppm) in a vehicle in presence of a suitable gasoline fuel, and an adulterated gasoline fuel, in accordance with an existing prior art. The NOx emission (ppm) may increase when the vehicle is not receiving a sufficient opportunity to adapt post external/internal vehicular hardware, factors leading to lean fuel environment. Furthermore, when the vehicle enters and exits transient events in a short period of time such as 1 sec, the system stays mis adapted/less adapted, fuelling may not be set to desired stoichiometry.
[0006] Fig. 1b illustrates a graphical representation 100b depicting an adaptation condition after a fresh fuel change, in accordance with an existing prior art. The current adaptation logic may not get sufficient time to adapt in low engine RPM and an air charge operating zone.
[0007] Thus, there is a need for a solution to overcome the above-mentioned drawbacks.
OBJECTS OF THE DISCLOSURE
[0008] Some of the objects of the present disclosure, which at least one embodiment herein satisfy, are listed below.
[0009] It is a general or primary object of the present subject matter to provide a system that enhances a fuel adaptation in a vehicle.
[0010] It is another object of the present subject matter to provide a system that provides a required stoichiometry of a vehicle in an event where a fuel feedback is off in the vehicle.
[0011] These and other objects and advantages will become more apparent when reference is made to the following description and accompanying drawings.
SUMMARY
[0012] This summary is provided to introduce concepts related to a method implemented in a vehicle for enhancing a fuel adaptation in a vehicle. The method includes identifying, by an Electronic Communication Unit (ECU), at least one abnormality in a vehicle when the vehicle is in an off idle condition and a fuel cut is on. The method includes determining, by the ECU, an instantaneous fuel adaptation value associated with the vehicle when the fuel cut is on. The method includes calculating a drift in a fuel adaptation value between the instantaneous fuel adaptation value and a first fuel adaptation value of a vehicle engine. The first fuel adaptation value corresponds to a required stoichiometry for the vehicle. The method further includes determining, by the ECU, a minimum fuel adaptation guard value to compensate the drift between the first fuel adaptation value and the instantaneous fuel adaptation value. The method also includes implementing, by the ECU, the minimum fuel adaptation guard value to the instantaneous fuel adaptation value to generate a second fuel adaptation value that enhances the fuel adaptation when the fuel cut is on.
[0013] The present subject matter further discloses a system implemented in a vehicle for enhancing a fuel adaptation in a vehicle. The system includes an ECU configured to identify at least one abnormality in a vehicle when the vehicle is in an off idle condition and a fuel cut is on. The ECU is configured to determine an instantaneous fuel adaptation value associated with the vehicle when the fuel cut is on. The ECU is configured to calculate a drift in a fuel adaptation value between the instantaneous fuel adaptation value and a first fuel adaptation value of a vehicle engine. The first fuel adaptation value corresponds to a required stoichiometry for the vehicle. The ECU is further configured to determine a minimum fuel adaptation guard value to compensate the drift between the first fuel adaptation value and the instantaneous fuel adaptation value. The ECU is also configured to implement the minimum fuel adaptation guard value to the instantaneous fuel adaptation value to generate a second fuel adaptation value that enhances the fuel adaptation when the fuel cut is on.
[0014] In an aspect of the present subject matter, enhancing the fuel adaptation corresponds to a change in a stoichiometry of a vehicle engine from a first stoichiometry to the required stoichiometry.
[0015] In an aspect of the present subject matter, the instantaneous fuel adaptation value corresponds to a first stoichiometry and implementation of the minimum fuel adaptation guard value changes the first stoichiometry to the required stoichiometry that enhances the fuel adaptation of the vehicle.
[0016] In an aspect of the present subject matter, determining the minimum fuel adaptation guard value comprises monitoring, by the ECU, a plurality of previous events corresponding to the fuel cut when the fuel feedback is off, determining, by the ECU, each fuel adaptation value of the vehicle prior to a fuel cut, on a revival of the fuel cut, and when the revival of the fuel cut ends during the plurality of events, monitoring, by the ECU, an input signal being received from a front O2 / lambda sensor for refining the first fuel adaptation value during an event of the fuel cut revival when the fuel cut ends, and determining by the ECU, the minimum fuel adaptation guard value based on average of the monitored fuel adaptation values and the input signal of front O2/lambda sensor.
[0017] In an aspect of the present subject matter, the method includes monitoring, by the ECU, the second fuel adaptation value, and optimize, by the ECU, the minimum fuel adaptation guard value based on the monitoring of the second fuel adaptation value.
[0018] In an aspect of the present subject matter, the the fuel cut is on when the vehicle is in a transient and gear shift condition and a fuel feedback is off.
[0019] In an aspect of the present subject matter, the the first fuel adaptation value is calculated prior to the vehicle entering a transient and gear shift condition.
[0020] In an aspect of the present subject matter, the at least one abnormality comprises a presence of one or more of an adulterated fuel, a malfunctioning hardware, and a non-working hardware in the vehicle.
[0021] In an aspect of the present subject matter, wherein the malfunctioning hardware, and the non-working hardware is an O2 sensor, a catalyst, a fuel pump, and a fuel injector.
[0022] Various objects, features, aspects, and advantages of the inventive subject matter will become more apparent from the following detailed description of preferred embodiments, along with the accompanying drawing figures in which like numerals represent like components.

BRIEF DESCRIPTION OF THE DRAWINGS
[0023] The illustrated embodiments of the subject matter will be best understood by reference to the drawings, wherein like parts are designated by like numerals throughout. The following description is intended only by way of example, and simply illustrates certain selected embodiments of devices, systems, and methods that are consistent with the subject matter as claimed herein, wherein:
[0024] Fig. 1a illustrates a graphical representation depicting a nitrogen (NOx) emission (ppm) in a vehicle in presence of a suitable gasoline fuel, and an adulterated gasoline fuel, in accordance with an existing prior art; and
[0025] Fig. 1b illustrates a graphical representation depicting an adaptation condition after a fresh fuel change, in accordance with an existing prior art;
[0026] Fig. 2 illustrates a schematic block diagram depicting a system implemented in a vehicle for enhancing a fuel adaptation in a vehicle, in accordance with an embodiment of the present subject matter;
[0027] Fig. 3 illustrates an operational flow diagram depicting a process 300 for enhancing a fuel adaptation in a vehicle, in accordance with an embodiment of the present subject matter;
[0028] Fig. 4 illustrates a graphical representation depicting a determination and an implementation of a minimum fuel adaptation guard value to provide a correct fueling as a vehicle enters and exits a lower RPM and an air charge operation, in accordance with an embodiment of the present subject matter;
[0029] Fig. 5 illustrates a graphical representation depicting a process for monitoring a number of events previous events corresponding to a fuel cut, in accordance with an embodiment of the present subject matter; and
[0030] Fig. 6 illustrates a schematic block diagram depicting a method for enhancing a fuel adaptation in a vehicle, in accordance with an embodiment of the present subject matter.
DETAILED DESCRIPTION
[0031] The following is a detailed description of embodiments of the disclosure depicted in the accompanying drawings. The embodiments are in such detail as to clearly communicate the disclosure. However, the amount of detail offered is not intended to limit the anticipated variations of embodiments; on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the scope of the present disclosure as defined by the appended claims.
[0032] As used in the description herein and throughout the claims that follow, the meaning of “a,” “an,” and “the” includes plural reference unless the context clearly dictates otherwise. Also, as used in the description herein, the meaning of “in” includes “in” and “on” unless the context clearly dictates otherwise.
[0033] Fig. 2 illustrates a schematic block diagram 200 depicting a system 202 implemented in a vehicle for enhancing a fuel adaptation in a vehicle, in accordance with an embodiment of the present subject matter. The system 202 may be configured to enhance the fuel adaptation by changing the stoichiometry of a vehicle engine. The system 202 may come in operation when a fuel cut is on for the vehicle , the vehicle is in an idle off condition and fuel feedback is off. The fuel feedback may correspond to an input from an O2/lambda sensor and the feedback is turned off during a number of occurrences causing the vehicle to enter a transient and gear shift condition. The number of occurrences may include the movement of an accelerator pedal and a gear shift in the vehicle. The idle off condition may correspond to an event where the vehicle is accelerating, decelerating or maintaining a constant speed and a vehicle speed is greater than zero and an engine Revolution Per Minute (RPM) is more than an idle RPM of the vehicle. The system 202 may include an ECU 204, an O2/lambda sensor 206 communicating with the ECU 204, and a memory 208.
[0034] In accordance with an embodiment of the present subject matter, the ECU 204 may be configured to identify at least one abnormality in the vehicle when the vehicle is in an off idle condition and when the fuel feedback from the 02 sensor 206 is off. The fuel feedback is off when the vehicle is in the transient or a steady state condition in an presence of an event of the said fuel cut on. The ECU 204 may inhibits an updation of fuel adaptation as the a use of the O2/ lambda sensor 206 signal is inhibited by the ECU 204 for correcting a fueling to meet a desired air fuel ratio of a target stoichiometry during the event of the fuel cut on Examples of the at least one abnormality may include, but are not limited to, presence of one or more of an adulterated fuel, a malfunctioning hardware, and a non-working hardware in the vehicle. The malfunctioning hardware, and the non-working hardware may be one of the O2 sensor 206, a catalytic convertor, a fuel pump, and a fuel injector etc.
[0035] In response to identifying the at least one abnormality, the ECU 204 may be configured to determine an instantaneous fuel adaptation value associated with the vehicle when the fuel feedback is off. The instantaneous fuel adaptation value may correspond to a first stoichiometry of the vehicle.
[0036] Subsequent to determining the instantaneous fuel adaptation value, the ECU 204 may be configured to calculate a drift in a fuel adaptation value between the instantaneous fuel adaptation value and a first fuel adaptation value of the vehicle. The first fuel adaptation value may correspond to a required stoichiometry for a vehicle engine. The first fuel adaptation value may be calculated prior to the vehicle entering into the event of the fuel cut on due to an abnormal accelerate pedal variation or a gear shift operation . The first fuel adaptation value may be stored in memory 208.
[0037] To that understanding, the ECU 204 may further be configured to determine a minimum fuel adaptation guard value to compensate the drift between the first fuel adaptation value and the instantaneous fuel adaptation value. The minimum fuel adaptation guard value may be configured to bridge a gap between a present fuel adaptation value of the vehicle engine when the vehicle is in the transient and gear shift condition, and a required fuel adaptation value for the vehicle engine.
[0038] Continuing with the above embodiment, upon determining the minimum fuel adaptation guard value, the ECU 204 may be configured to implement the minimum fuel adaptation guard value to the instantaneous fuel adaptation value. Implementing the minimum fuel adaptation guard value may result in generation of a second fuel adaptation value that enhances the fuel adaptation when the fuel feedback is off. To that understanding, enhancing the fuel adaptation may correspond to a change in the stoichiometry of the vehicle engine from a first stoichiometry to the required stoichiometry. The implementation may further change the first stoichiometry to the required stoichiometry that enhances the fuel adaptation of the vehicle.
[0039] In continuation with the above embodiment, the ECU 204 may be configured to determine the minimum fuel adaptation guard value by monitoring a number of previous events corresponding to a fuel cut when the fuel feedback is off. While monitoring, the ECU 204 may be configured to determine each fuel adaptation value of the vehicle prior to a fuel cut, on a revival of the fuel cut, and when the revival of the fuel cut ends during the plurality of events. In simultaneous manner, the ECU 204 may be configured to monitor an input signal being received from an sensor 206O2/lambda sensor 206 when the revival of the fuel cut ends. Further, the ECU 204 may be configured to determine the minimum fuel adaptation guard value based on average of the monitored fuel adaptation values and the input signal. To that understanding, the ECU 204 may further be configured to monitor the second fuel adaptation value and further may optimize the minimum fuel adaptation guard value based on the monitoring of the second fuel adaptation value.
[0040] Fig. 3 illustrates an operational flow diagram depicting a process 300 for enhancing a fuel adaptation in a vehicle, in accordance with an embodiment of the present subject matter. The process 300 may be implemented in a vehicle by system 202 as referred in the fig. 2. Enhancing the fuel adaptation may correspond to changing the fuel adaptation value of a vehicle engine when a fuel cut is on and a fuel feedback off while the vehicle is in an idle off condition. The idle off condition may correspond to an event where a vehicle is in one of a number of running conditions such as an acceleration , a deceleration and a constant speed excluding the events of the fuel cut , while the vehicle engine is also engaged drive train to propel the vehicle. The process 300 implemented by the system 202 may assist the vehicle to avoid a drivability, and an emission degradation due to excessive richness or leanness that may occur due to a bad fuel or an intermediate issue in vehicular hardware such as an injector, an oxygen sensor 206 or the like. The process 300 may be configured to identify a fuel adaptation gap between an adapted and a less adapted zone and may further provide an intermittent adaptation to be applied to avoid an unusual system leanness and richness that may lead to a higher tail pipe emission intermittently.
[0041] At step 302, process 300 may include, determining that the vehicle engine is ignited on and the vehicle is in the idle off condition. The determination may be performed by the ECU 204 as referred in fig. 2.
[0042] At step 304, process 300 may include, calculating a first fuel adaptation value of the vehicle. The first fuel adaptation value may correspond to a required stoichiometry for a vehicle engine. The first fuel adaptation value may be calculated prior to the vehicle entering into fuel cut due to transient and gear shift condition. The first fuel adaptation value may be stored in the memory 208 as referred in the fig. 2. The first fuel adaptation value may be calculated by the ECU 204.
[0043] At step 306, the process 300 may include determining that the fuel cut is one and the fuel feedback of the vehicle is off while the vehicle is in the idle off condition. The fuel feedback may correspond to an input from an sensor 206O2/lambda sensor 206 and the feedback is turned off during a number of occurrences causing the vehicle to enter a transient and gear shift condition. The number of occurrences may include the movement of a pedal and a gear shift in the vehicle. The idle off condition may correspond to an event where a speed of vehicle is greater than zero and an engine is on and engaged with a minimum Revolution Per Minute (RPM) of the vehicle.
[0044] At step 308, the process 300 may include identifying at least one abnormality in the vehicle when the vehicle is in an off idle condition and the fuel feedback from the 02 sensor 206 is off. The identification may be performed by the ECU 204. Examples of at least one abnormality may include, but are not limited to, a presence of one or more of an adulterated fuel, a malfunctioning hardware, and a non-working hardware in the vehicle. The malfunctioning hardware, and the non-working hardware may be one of the O2 sensor 206, a catalytic convertor, a fuel pump, and a fuel injector.
[0045] At step 310, the process 300 may include determining by the ECU 204 an instantaneous fuel adaptation value associated with the vehicle when the fuel feedback is off. The instantaneous fuel adaptation value may correspond to a first stoichiometry of the vehicle.
[0046] At step 312, the process 300 may include comparing the instantaneous fuel adaptation value of the vehicle with the first fuel adaptation value stored in the memory 208. The comparison may be performed by the ECU 204.
[0047] At step 314, the process 300 may include calculating by the ECU 204 a drift in a fuel adaptation value between the instantaneous fuel adaptation value and the first fuel adaptation value of the vehicle. The drift may be calculated to further determine that a minimum fuel adaptation guard value needs to be determined for correcting a stoichiometry of the vehicle.
[0048] At step 316, the process 300 may include determining by the ECU 204, the minimum fuel adaptation guard value to compensate the drift between the first fuel adaptation value and the instantaneous fuel adaptation value. The minimum fuel adaptation guard value may be configured to bridge a gap between a present fuel adaptation value of the vehicle engine when the vehicle is in the transient and gear shift condition, and a required fuel adaptation value for the vehicle engine. For determining the minimum fuel adaptation guard value, the process 300 may include determining the minimum fuel adaptation guard value by monitoring a number of previous events corresponding to a fuel cut when the fuel feedback is off. The process 300 may further include determining each fuel adaptation value of the vehicle prior to a fuel cut, on a revival of the fuel cut, and when the revival of the fuel cut ends during the plurality of events. Simultaneous to monitoring the number of events, the process 300 may include monitoring an input signal being received from an sensor 206O2/lambda sensor 206 when the revival of the fuel cut ends. To that understanding, the process 300 may further include determining the minimum fuel adaptation guard value based on average of the monitored fuel adaptation values and the input signal.
[0049] At step 318, the process 300 may include implementing by the ECU 204, the minimum fuel adaptation guard value to the instantaneous fuel adaptation value. Implementing the minimum fuel adaptation guard value may result in generation of a second fuel adaptation value that enhances the fuel adaptation when the fuel feedback is off. To that understanding, enhancing the fuel adaptation may correspond to a change in a stoichiometry of the vehicle engine from a first stoichiometry to the required stoichiometry. The implementation may further change the first stoichiometry to the required stoichiometry that enhances the fuel adaptation of the vehicle. By implementing the minimum fuel adaptation guard value, the ECU 204 may increase/reduce a fuel injection amount post an event of the fuel cut revival. A gap between intended and actual fuel adaptations may be continuously monitored by the ECU 204 and the ECU 204 may provide and modify the minimum fuel adaptation guard value to provide best closest fueling near desired stoichiometry.
[0050] Post the implementation of the minimum fuel adaptation guard value, the ECU 204 may further validate a stability of an instantaneous fuel feedback in order to validate and correct the minimum fuel adaptation guard value.
[0051] Fig. 4 illustrates a graphical representation 400 depicting a determination and an implementation of a minimum fuel adaptation guard value to provide a correct fueling as a vehicle enters and exits a lower RPM and an air charge operation, in accordance with an embodiment of the present subject matter. The implementation may further change a first stoichiometry of the vehicle to a required stoichiometry that enhances the fuel adaptation of the vehicle. By implementing the minimum fuel adaptation guard value, the ECU 204 may increase/reduce a fuel injection amount post an event of the fuel cut revival.
[0052] Fig. 5 illustrates a graphical representation depicting a process 500 for monitoring a number of events previous events corresponding to a fuel cut, in accordance with an embodiment of the present subject matter. The process 500 may be performed by the ECU 204 as referred in the fig. 2. The process 500 may be performed to determine a minimum fuel adaptation guard value required for a vehicle engine. The process 500 may include monitoring the number of previous events corresponding to a fuel cut when the fuel feedback is off. The process 500 may further include determining each fuel adaptation value of the vehicle prior to a fuel cut, on a revival of the fuel cut, and when the revival of the fuel cut ends during the plurality of events. The process 500 may further include monitoring an input signal being received from an sensor 206O2/lambda sensor 206 when the revival of the fuel cut ends. The process 500 may include determining the minimum fuel adaptation guard value based on average of the monitored fuel adaptation values and the input signal. To that understanding, post the implementation, the ECU 204 may further be configured to monitor the second fuel adaptation value and further may optimize the minimum fuel adaptation guard value based on the monitoring of the second fuel adaptation value. The ECU 204 may further validate a stability of an instantaneous fuel feedback in order to validate and correct the minimum fuel adaptation guard value.
[0053] Fig. 6 illustrates a schematic block diagram depicting a method 600 for enhancing a fuel adaptation in a vehicle, in accordance with an embodiment of the present subject matter. The method 600 may be performed by the system 202 and the components thereof.
[0054] At block 602, the method 600 includes, identifying, by an Electronic Communication Unit (ECU), at least one abnormality in a vehicle when the vehicle is in an off idle condition and a fuel cut is on.
[0055] At block 604, the method 600 includes, determining, by the ECU, an instantaneous fuel adaptation value associated with the vehicle when the fuel cut is on.
[0056] At block 606, the method 600 includes, calculating, by the ECU, a drift in a fuel adaptation value between the instantaneous fuel adaptation value and a first fuel adaptation value of the vehicle, wherein the first fuel adaptation value corresponds to a required stoichiometry for a vehicle engine.
[0057] At block 608, the method 600 includes determining, by the ECU, a minimum fuel adaptation guard value to compensate the drift between the first fuel adaptation value and the instantaneous fuel adaptation value.
[0058] At block 610, the method 600 includes implementing, by the ECU, the minimum fuel adaptation guard value to the instantaneous fuel adaptation value to generate a second fuel adaptation value that enhances the fuel adaptation when the fuel cut is on.
[0001] While the detailed description describes various embodiments of the invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof. The scope of the invention is determined by the claims that follow. The invention is not limited to the described embodiments, versions, or examples, which are included to enable a person having ordinary skill in the art to make and use the invention when combined with information and knowledge available to the person having ordinary skill in the art.
, Claims:We claim:
1. A method (600) for enhancing a fuel adaptation in a vehicle, the method (600) comprising:

identifying, by an Electronic Communication Unit (ECU (204), at least one abnormality in a vehicle when the vehicle is in an off idle condition and a fuel cut for the vehicle is on;;
determining, by the ECU (204), an instantaneous fuel adaptation value associated with the vehicle when the fuel cut is on;
calculating, by the ECU (204), a drift in a fuel adaptation value between the instantaneous fuel adaptation value and a first fuel adaptation value of the vehicle, wherein the first fuel adaptation value corresponds to a required stoichiometry for a vehicle engine;
determining, by the ECU (204), a minimum fuel adaptation guard value to compensate the drift between the first fuel adaptation value and the instantaneous fuel adaptation value;
implementing, by the ECU (204), the minimum fuel adaptation guard value to the instantaneous fuel adaptation value to generate a second fuel adaptation value that enhances the fuel adaptation when the fuel cut is on.

2. The method (600) as claimed in claim 1, wherein enhancing the fuel adaptation corresponds to a change in a stoichiometry of the vehicle engine from a first stoichiometry to the required stoichiometry.

3. The method (600) as claimed in claim 1 or 2, wherein the instantaneous fuel adaptation value corresponds to a first stoichiometry and implementation of the minimum fuel adaptation guard value changes the first stoichiometry to the required stoichiometry that enhances the fuel adaptation of the vehicle.

4. The method (600) as claimed in claim 1, wherein determining the minimum fuel adaptation guard value comprises:

monitoring, by the ECU (204), a plurality of previous events corresponding to the fuel cut when the fuel cut is on;
determining, by the ECU (204), each fuel adaptation value of the vehicle prior to a fuel cut, on a revival of the fuel cut, and when the revival of the fuel cut ends during the plurality of events;
monitoring, by the ECU (204), an input signal being received from an a front O2 / lambda sensor (206) for refining the first fuel adaptation value during an event of the fuel cut revival when the fuel cut ends ; and
determining, by the ECU (204), the minimum fuel adaptation guard value based on average of the monitored fuel adaptation values and the input signal.
5. The method (600) as claimed in claim 1, further comprising:
monitoring, by the ECU (204), the second fuel adaptation value; and
optimize, by the ECU (204), the minimum fuel adaptation guard value based on the monitoring of the second fuel adaptation value.

6. The method (600) as claimed in claim 1, wherein the fuel cut is on when the vehicle is in a transient and gear shift condition and a fuel feedback is off.

7. The method (600) as claimed in claim 1, wherein the first fuel adaptation value is calculated prior to the vehicle entering a transient and gear shift condition.

8. The method (600) as claimed in claim 1, wherein the at least one abnormality comprises a presence of one or more of an adulterated fuel, a malfunctioning hardware, and a non-working hardware in the vehicle.

9. The method (600) as claimed in claim 8, wherein the malfunctioning hardware, and the non-working hardware is one of an O2/lambda sensor (206), a catalyst, a fuel pump, and a fuel injector.

10. A system (202) implemented in a vehicle for enhancing a fuel adaptation in a vehicle, the system (202) comprising:

Electronic Communication Unit (ECU (204) configured to:
Identify at least one abnormality in a vehicle when the vehicle is in an off idle condition and a fuel cut for the vehicle is on;
determine an instantaneous fuel adaptation value associated with the vehicle when the fuel cut is on;
calculate a drift in a fuel adaptation value between the instantaneous fuel adaptation value and a first fuel adaptation value of the vehicle, wherein the first fuel adaptation value corresponds to a required stoichiometry for a vehicle engine;
determine a minimum fuel adaptation guard value to compensate the drift between the first fuel adaptation value and the instantaneous fuel adaptation value; and
implement the minimum fuel adaptation guard value to the instantaneous fuel adaptation value to generate a second fuel adaptation value that enhances the fuel adaptation when the fuel cut is on.