Description:FORM 2
THE PATENTS ACT, 1970
(39 of 1970)
&
The Patents Rules, 2003

COMPLETE SPECIFICATION
(See Section 10 and Rule 13)

A FUEL CONTROL SYSTEM FOR A VEHICLE AND A METHOD THEREOF

APPLICANT:

TVS MOTOR COMPANY LIMITED, an Indian Company at: “Chaitanya”, No.12 Khader Nawaz Khan Road, Nungambakkam, Chennai 600 006.

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

TECHNICAL FIELD
[0001] The present subject matter relates generally to a fuel control system for a vehicle and a method thereof. More particularly but not exclusively, the present subject matter relates to a fuel control system for a vehicle and a fuel control method for switching an operation of an internal combustion engine between a primary fuel mode and a secondary fuel mode.

BACKGROUND
[0002] Dual fuel internal combustion engines have experienced widespread adoption in the recent years. The advantage of a dual-fuel engine is that it can use both liquid-oil fuel and gaseous fuel, so adding to the security of fuel supply. Dual fuel engines operate on a primary (main) fuel and a secondary (pilot) fuel. The primary fuel source is typically a gaseous fuel such as compressed natural gas, which is injected into the intake manifold. The secondary or pilot fuel, typically such as, but not limited to, petrol, ethanol or other types of compatible liquid fuels, is injected into the combustion chamber using the standard fuel injection equipment such as, but not limited to, carburetors and is used to ignite the mixture.
[0003] In conventional dual-fuel vehicles, the operation of the internal combustion engine on the primary and secondary fuels typically involves separate fuel control mechanisms. The fuel control is managed either through an injector or a carburetor for liquid-oil fuel, often accompanied by a fuel pump or solenoid for the gaseous fuel. When the internal combustion engine is cranked, it starts running on the selected primary or secondary fuel, and it continues to operate on the chosen fuel mode throughout its runtime.
[0004] However, challenges arise in ensuring optimal startability, as the internal combustion engine tends to exhibit better performance under specific operating conditions with one of the primary and secondary fuels only. To address this concern, users commonly crank the internal combustion engine in one fuel mode initially and manually switch to the other fuel during operation. Manual intervention is required because an automatic changeover during engine running conditions may lead to undesired engine behaviour. However, changing the fuel mode during operation through manual intervention is also not desired as the process is inconvenient. Further, various engine operating parameters are not taken into consideration, during manual changeover process, thereby leading to the malfunction and disruption of the internal combustion engine operation. The limitations in achieving automatic fuel changeover compromise the startability of the vehicle, posing a significant hurdle in enhancing user comfort.
[0005] Therefore, there is a need for an advanced solution that can intelligently enable an automatic selection and seamless changeover of the optimal fuel mode to ensure optimum startability of the internal combustion engine.

SUMMARY OF THE INVENTION
[0006] The present subject matter relates to a fuel control system for a vehicle. The fuel control system comprises one or more fuel control devices, and a control unit. The one or more fuel control devices is coupled to an internal combustion engine of the vehicle. The one or more fuel control devices is configured to regulate a supply of at least one of a primary fuel and a secondary fuel to the internal combustion engine. The internal combustion engine is configured to operate in at least one of a primary fuel mode and a secondary fuel mode. The control unit is configured to continuously monitor a plurality of first parameters and a plurality of second parameters of the internal combustion engine upon an operational initiation of the internal combustion engine in the secondary fuel mode. The control unit is configured to detect a stabilized operation of the internal combustion engine in the secondary fuel mode upon a satisfaction of the plurality of first parameters of the internal combustion engine. The control unit is configured to shift from the secondary fuel mode to the primary fuel mode upon a satisfaction of the plurality of second parameters of the internal combustion engine.
[0007] The present subject matter also relates to a fuel control method for a vehicle. The fuel control method comprises a step of switching on an ignition of an internal combustion engine. The fuel control method also comprises a step of initiating an operation of the internal combustion engine in a secondary fuel mode. The fuel control method also comprises a step of detecting a stabilized operation of the internal combustion engine by a control unit upon a satisfaction of a plurality of first parameters of the internal combustion engine. The plurality of first parameters is continuously monitored by the control unit. The fuel control method also comprises a step of shifting the operation of the internal combustion engine from the secondary fuel mode to a primary fuel mode by the control unit upon a satisfaction of a plurality of second parameters of the internal combustion engine. The plurality of second parameters is continuously monitored by the control unit. The fuel control method further comprises a step of operating the internal combustion engine in the primary fuel mode.

BRIEF DESCRIPTION OF THE DRAWINGS
[0008] The details are described with reference to the embodiments of a fuel control system for a vehicle and a fuel control method. The same numbers are used throughout the drawings to refer similar features and components.
[0009] Figure 1 illustrates a side view of a vehicle from left side of the vehicle, as per one embodiment of the present disclosure.
[0010] Figure 2 illustrates the fuel control system, as per one embodiment of the present disclosure.
[0011] Figure 3 illustrates a flow chart depicting the fuel control method, as per one embodiment of the present disclosure.
[0012] Figure 4 illustrates a graphical representation of an additional fuel mode detection by the control unit.
[0013] Figure 5 illustrates a graphical representation of a detection of the fuel mode changeover by the control unit.
[0014] Figure 6 illustrates a flow chart depicting an additional mode detection by the control unit.

DETAILED DESCRIPTION
[0015] In order to overcome one or more of the above-mentioned challenges, the disclosed invention enables a seamless shift from the secondary fuel mode to the primary fuel mode without requiring manual intervention from the user. The proposed technique of the present disclosure can intelligently assess the engine's operating conditions, allowing for the automatic selection of an optimal fuel mode for starting. Such an automated system would enable a transition between fuels during operation, not only improving the vehicle's cranking.
[0016] As per one embodiment of the invention, a fuel control system for a vehicle is disclosed. The fuel control system comprises one or more fuel control devices, and a control unit. The one or more fuel control devices is coupled to an internal combustion engine of the vehicle. The one or more fuel control devices is configured to regulate a supply of at least one of a primary fuel and a secondary fuel to the internal combustion engine. The internal combustion engine is configured to operate in at least one of a primary fuel mode and a secondary fuel mode. The control unit is configured to continuously monitor a plurality of first parameters and a plurality of second parameters of the internal combustion engine upon an operational initiation of the internal combustion engine in the secondary fuel mode. The control unit is configured to detect a stabilized operation of the internal combustion engine in the secondary fuel mode upon a satisfaction of the plurality of first parameters of the internal combustion engine. The control unit is configured to shift from the secondary fuel mode to the primary fuel mode upon a satisfaction of the plurality of second parameters of the internal combustion engine.
[0017] As per one embodiment of the invention, the one or more fuel control devices comprises a secondary fuel control device. The control unit is configured to control the secondary fuel control device. The secondary fuel control device is configured to regulate a supply of the secondary fuel from a secondary fuel storage to a fuel intake of the internal combustion engine in the secondary fuel mode.
[0018] As per one embodiment of the invention, the control unit is configured to restrict the supply of the secondary fuel through the secondary fuel control device upon the detection of the stabilized operation of the internal combustion engine.
[0019] As per one embodiment of the invention, the secondary fuel is a gasoline fuel and the secondary fuel control device can be a carburetor and/or a fuel injector.
[0020] As per one embodiment of the invention, the one or more fuel control devices comprises a primary fuel control device. The control unit is configured to control the primary fuel control device. The primary fuel control device is configured to regulate a supply of the primary fuel from a primary fuel storage to a fuel intake of the internal combustion engine in the primary fuel mode.
[0021] As per one embodiment of the invention, the control unit is configured to allow the supply of the primary fuel through the primary fuel control device upon the satisfaction of the plurality of second parameters.
[0022] As per one embodiment of the invention, the primary fuel is a gaseous fuel and the primary fuel control device can be, but not limited to, a gas solenoid.
[0023] As per one embodiment of the invention, the control unit is an Engine Control Unit. The plurality of first parameters comprises an engine speed, a throttle position, an engine pressure, an engine temperature and a vehicle speed. The plurality of secondary parameters comprises an oxygen level and an engine crank position.
[0024] As per another embodiment of the invention, a fuel control method for a vehicle is disclosed. The fuel control method comprises a step of switching on an ignition of an internal combustion engine. The fuel control method also comprises a step of initiating an operation of the internal combustion engine in a secondary fuel mode. The fuel control method also comprises a step of detecting a stabilized operation of the internal combustion engine by a control unit upon a satisfaction of a plurality of first parameters of the internal combustion engine. The plurality of first parameters is continuously monitored by the control unit. The fuel control method also comprises a step of shifting the operation of the internal combustion engine from the secondary fuel mode to a primary fuel mode by the control unit upon a satisfaction of a plurality of second parameters of the internal combustion engine. The plurality of second parameters is continuously monitored by the control unit. The fuel control method further comprises a step of operating the internal combustion engine in the primary fuel mode.
[0025] As per another embodiment of the invention, a supply of a secondary fuel from a secondary fuel storage to a fuel intake of the internal combustion engine in the secondary fuel mode is regulated by a secondary fuel control device. The secondary fuel control device is controlled by the control unit.
[0026] As per another embodiment of the invention, shifting the operation of the internal combustion engine from the secondary fuel mode to the primary fuel mode by the control unit includes the step of restricting the supply of the secondary fuel by the control unit through the secondary fuel control device upon detecting the stabilized operation of the internal combustion engine.
[0027] As per another embodiment of the invention, a supply of a primary fuel from a primary fuel storage to a fuel intake of the internal combustion engine in the primary fuel mode is regulated by a primary fuel control device. The primary fuel control device is controlled by the control unit.
[0028] As per another embodiment of the invention, shifting the operation of the internal combustion engine from the secondary fuel mode to the primary fuel mode by the control unit includes a step of allowing the supply of the primary fuel by the control unit through the primary fuel control device upon the satisfaction of the plurality of second parameter.
[0029] The embodiments of the present invention will now be described in detail with reference to an embodiment of a fuel control system (200) for a vehicle (100) and a fuel control method (300), along with the accompanying drawings. However, the disclosed invention is not limited to the present embodiments.
[0030] The embodiments shown in Figure 1 and Figure 2 are taken together for discussion. Figure 1 illustrates a side perspective view of the vehicle (100) from one of the lateral sides of the vehicle (100), as per one embodiment of the present disclosure. Figure 2 illustrates the fuel control system (200), as per one embodiment of the present disclosure.
[0031] The vehicle (100) comprises an internal combustion engine (101), a primary fuel storage (102A) and a secondary fuel storage (102B). In one of the embodiments, the vehicle (100) is a three-wheeled vehicle in which the internal combustion engine (101), the primary fuel storage (102A) and the secondary fuel storage (102B) are disposed in a rear portion of the vehicle (100). However, the present invention is not limited to the three-wheeled vehicle as it can be worked with any vehicle (100) comprising the internal combustion engine (101), which is a dual-fuel engine, i.e., the engine has the capability to run on two different fuels with fuel storage and supply controls for each Thus, internal combustion engine (101) can operate in a primary fuel mode by utilizing a primary fuel and a secondary fuel mode by utilizing a secondary fuel.
[0032] The primary fuel storage (102A) stores the primary fuel while the secondary fuel storage (102B) stores the secondary fuel. In a preferred embodiment, the secondary fuel is a gasoline fuel and the primary fuel is a gaseous fuel. The vehicle (100) exhibits better startability and cranking efficiency when the secondary fuel is used at the time of cranking. However, operating the vehicle (100) only on the secondary fuel is not desired as the secondary fuel is costly and not environment friendly due to noxious emissions it emits. This necessitates the shift of the operation from the secondary fuel mode to the primary fuel mode. The fuel control system (200) carries out the shift from the secondary fuel mode to the primary fuel mode without any manual intervention.
[0033] The fuel control system (200) comprises one or more fuel control devices (201A, 201B), and a control unit (202). The one or more fuel control devices (201A, 201B) is coupled to an internal combustion engine (101) of the vehicle (100). The one or more fuel control devices (201A, 201B) regulates a supply of at least one of a primary fuel and a secondary fuel to the internal combustion engine (101).
[0034] The control unit (202) continuously monitors a plurality of first parameters and a plurality of second parameters of the internal combustion engine (101) upon an operational initiation of the internal combustion engine (101) in the secondary fuel mode. The operational initiation of the internal combustion engine (101) can be carried out through a starter motor or an Integrated Starter Generator (ISG). The starter motor or the Integrated Starter Generator is coupled with the crankshaft of the internal combustion engine (101). Upon a rotation of the crankshaft by the starter motor or the Integrated Starter Generator, the internal combustion engine (101) is cranked.
[0035] Further, the plurality of first parameters and the plurality of second parameters of the internal combustion engine (101) are monitored by the control unit (202) through a plurality of sensors. The plurality of sensors includes but not limited to a Mass Air Flow (MAF) Sensor, a Temperature Sensor in the combustion chamber, an Engine Knock Sensor, an Engine Crankshaft Position Sensor, a Temperature Sensor/Mid catalytic on the Catalytic Converter, an Oxygen Sensor on the Catalytic Converter, an Exhaust Air Temperature Sensor and a Throttle Position Sensor. The plurality of sensors provides real time values of the plurality of first parameters and the plurality of second parameters of the internal combustion engine (101) to the control unit (202).
[0036] The control unit (202) detects a stabilized operation of the internal combustion engine (101) in the secondary fuel mode upon a satisfaction of the plurality of first parameters of the internal combustion engine (101). The plurality of first parameters comprises an engine speed, a throttle position, an engine pressure, an engine temperature and a vehicle speed. The engine speed is referred to a rotational speed of the crankshaft of the internal combustion engine (101). The engine pressure is referred to manifold absolute pressure value of the internal combustion engine (101). The engine temperature is referred to the temperature values of an air inlet temperature and the temperature of the coolant used in the internal combustion engine (101). The control unit (202) verifies the real time value of the first parameters with a predefined values of the first parameters in order to detect the stabilized operation of the internal combustion engine (101) in the secondary fuel mode.
[0037] The control unit (202) shifts the operation of the internal combustion engine (101) from the secondary fuel mode to the primary fuel mode upon a satisfaction of the plurality of second parameters of the internal combustion engine (101).
[0038] The one or more fuel control devices (201A, 201B) comprises a primary fuel control device (201A) and a secondary fuel control device (201B). In one embodiment, the primary fuel control device (201A) and the secondary fuel control device (201B) are integrated. In another embodiment, the primary fuel control device (201A) and the secondary fuel control device (201B) can be functionally distinct. This configuration ensures that the failure of one fuel control devices (201A, 201B) does not affect the functionality of the other.
[0039] In one of the preferred embodiments, the control unit (202) is an Engine Control Unit. The control unit (202) is communicatively coupled with the primary fuel control device (201A), the secondary fuel control device (201B) and the internal combustion engine (101). The control unit (202) can control the primary fuel control device (201A) and the secondary fuel control device (201B) through a controller area network (CAN bus) of the vehicle (100). The secondary fuel control device (201B) regulates a supply of the secondary fuel from a secondary fuel storage (102B) to a fuel intake of the internal combustion engine (101) in the secondary fuel mode. Thus, the secondary fuel is utilized when the internal combustion engine (101) is operated in the secondary fuel mode. The control unit (202) restricts the supply of the secondary fuel through the secondary fuel control device (201B) upon the detection of the stabilized operation of the internal combustion engine (101). In one of the preferred embodiments, the secondary fuel control device (201B) is a carburetor. The carburetor is communicatively coupled with the control unit (202).
[0040] The primary fuel control device (201A) regulates a supply of the primary fuel from the primary fuel storage (102A) to the fuel intake of the internal combustion engine (101) in the primary fuel mode. In one of the preferred embodiments, the primary fuel control device (201A) is a gas solenoid. Thus, the primary fuel is utilized when the internal combustion engine (101) is operated in the primary fuel mode. The control unit (202) allows the supply of the primary fuel through the primary fuel control device (201A) upon the satisfaction of the plurality of second parameters. The plurality of secondary parameters comprises an oxygen level and an engine crank position. The oxygen level refers to the level of oxygen in the exhaust gases in the downstream of an exhaust port of the internal combustion engine (101). The control unit (202) verifies the real time value of the plurality of second parameters with a predefined values of the plurality of second parameters in order to allow the supply of the primary fuel through the primary fuel control device (201A).
[0041] Figure 3 illustrates a fuel control method (300) for a vehicle (100) through a flow chart. The fuel control method (300) is orchestrated by the control unit (202). The fuel control method (300) comprises a step of switching on (301) an ignition of an internal combustion engine (101). In a preferred embodiment, an ignition key is used for of switching on (301) the ignition of the internal combustion engine (101).
[0042] The fuel control method (300) also comprises a step of initiating (302) an operation of the internal combustion engine (101) in a secondary fuel mode. The fuel control method (300) also comprises a step of detecting (303) a stabilized operation of the internal combustion engine (101) by a control unit (202) upon a satisfaction of a plurality of first parameters of the internal combustion engine (101).
[0043] The fuel control method (300) also comprises a step of shifting (304) the operation of the internal combustion engine (101) from the secondary fuel mode to the primary fuel mode by the control unit (202) upon a satisfaction of a plurality of second parameters of the internal combustion engine (101). The step of shifting (304) the operation of the internal combustion engine (101) from the secondary fuel mode to the primary fuel mode is multi-stage process. The shifting (304) involves the step of restricting the supply of the secondary fuel by the control unit (202) through the secondary fuel control device (201B) upon detecting (303) the stabilized operation of the internal combustion engine (101). Once the supply of secondary fuel is restricted, the supply of the primary fuel is allowed by the control unit (202) through the primary fuel control device (201A) upon the satisfaction of the plurality of second parameter to achieve the shifting (304) the operation of the internal combustion engine (101) from the secondary fuel mode to the primary fuel mode. The fuel control method (300) further comprises a step of operating (305) the internal combustion engine (101) in the primary fuel mode.
[0044] The embodiments shown in Figure 4 to Figure 6 are taken together for discussion. Figure 4 illustrates a graphical representation of an additional fuel mode detection (4) by the control unit (202). Figure 5 illustrates a graphical representation of a detection of the fuel mode changeover by the control unit (202). Figure 6 illustrates a flow chart depicting an additional mode detection (4) by the control unit (202).
[0045] The control unit (202) of the fuel control system (200) detects an additional fuel mode (4) based upon an input from the ignition and a fuel mode selector switch. When the ignition of the vehicle (100) is on and the fuel mode selector switch is in a neutral position (3), the control unit (202) detects the additional fuel mode (4). The Y-axis of in Figure 4 and Figure 5 represents a state (on/off) of the ignition, position of the fuel mode selector switch and fuel mode detected by the control unit (202) plotted against the X-axis representing time.
[0046] Initially, the ignition is in the off state. The user selects the position of the fuel selector switch. This position is called neutral position. The control unit (202) detects it as the additional fuel mode (4). To detect the additional fuel mode (4), the control unit (202) first checks the state of ignition, which should be ON. As soon as the ignition is ON, the control unit (202) detects it and checks the position of fuel selector switch in the neutral position. Upon the detection of the additional fuel mode (4), the vehicle (100) runs by partially using the primary fuel and partially using the primary fuel.
[0047] When the user changes the position of fuel selector switch from the neutral position (3) to the primary fuel position (1) or the secondary fuel position (2), the control unit (202) changes the fuel supply from the primary fuel to the secondary fuel. The vehicle (100) in neutral position (3) uses secondary fuel during ignition, which is detected by the control unit (202). Then control unit (202) detects the fuel selector position from neutral position (3) to other position and then proceeds to change the fuel type. The initial ignition is done by using the secondary fuel because the primary fuel being lighter than the environmental air, may leak and discharge gradually, if the vehicle (100) is running on the primary fuel.
[0048] During operation, when the fuel selector switch is in the neutral position (3), the vehicle (100) initially runs on the secondary fuel. The control unit (202) monitors the fuel selector switch position and transitions the fuel supply from the secondary fuel to the primary fuel when the switch is moved from the neutral position (3) to another position (1 or 2). This allows the vehicle (100) to operate using a combination of the secondary fuel and the primary fuel.
[0049] The inclusion of the additional fuel mode (4) detection configuration ensures efficient utilization of both the secondary fuel and the primary fuel, providing flexibility and optimizing fuel consumption based on user preferences. Additionally, the initial ignition fuel supply with the secondary fuel serves as a safety measure to prevent potential leakage when the vehicle (100) is running on the primary fuel. The present disclosed subject matter has several advantages. While conventional fuel mode change systems required manual intervention from the user thereby causing inconvenience and dissatisfaction, present invention eliminates the same making the fuel mode change, more accurate. This also contributes to energy efficiency of the vehicle. Available approaches do not take the various operational parameters of the internal combustion engine (101) while making the shift from the secondary fuel mode to the primary fuel mode. The automatic fuel mode changeover implemented through various embodiments of the disclosed invention, successfully eliminates the inconvenience caused to the user in the process of providing the manual input. Further, an average user may not be well equipped with knowledge as to timing to make the shift in fuel mode and in several instances may be deciding on intuition or ignorance which may cause inefficient fuel combustion, improper operating of the vehicle. The automatic fuel mode changeover eliminates scope for such user based errors. In case when the primary fuel is compressed natural gas and the secondary fuel is petrol, the prolonged use of petrol if the user forgets to switch over to gas fuel may lead to enhanced emissions and increased costs of operating the vehicle. The present invention, therefore, also helps in keeping emissions low and high fuel efficiency which is an economic advantage. The improper and inaccurate fuel mode change by user also leads to poor driving experience as the user has to keep thinking about shifting the fuel mode at the appropriate time and has to divert attention from driving to do so. Thus, the present invention also helps in improving driving experience, and making the driving experience safer as the driver need not divert attention in shifting fuel mode while driving. Apart from that, the issues pertaining to engine shutting off, malfunction and undesired behavior are avoided as the fuel mode changeover is based upon an intelligent assessment, that takes various parameters of the internal combustion engine (101) into consideration. As a result, the startability and cranking efficiency of the internal combustion engine (101) is improved and leads to enhanced user comfort and satisfaction.
[0050] The present disclosed invention relates to a fuel control system (200) for a vehicle (100) and a fuel control method (300). In an exemplary embodiment, the vehicle (100) is a three wheeled vehicle. However, the present invention is not limited to three-wheeled vehicle. The present invention can be implemented in vehicle (100) comprising an internal combustion engine (101) which can operate on a primary fuel and a secondary fuel. Further, the disclosed invention is not limited to the aforementioned embodiments. For example, as used in this specification and the appended claims, the singular forms “a,” “an” and “they” can include plural referents unless the content clearly indicates otherwise. Further, when introducing elements/components/etc. of the assembly/system/methods described and/or illustrated herein, the articles “a”, “an”, “the”, and “said” are intended to mean that there is one or more of the element(s)/component(s)/etc. The terms “comprising”, “including”, and “having” are intended to be inclusive and mean that there may be additional element(s)/component(s)/etc. other than the listed element(s)/component(s)/etc.
[0051] This written description uses examples to provide details on the disclosure, including the best mode, and also to enable any person skilled in the art to practice the disclosure, including making and using any devices or systems or performing any incorporated methods. The scope of the disclosure is defined by the claims, and may include other examples that occur to those skilled in the art. Such other examples are intended to be within the scope of the claims if they have structural elements that do not differ from the literal language of the claims, or if they include equivalent structural elements with insubstantial differences from the literal language of the claims.
[0052] It is to be understood that the aspects of the embodiments are not necessarily limited to the features described herein. Many modifications and variations of the present subject matter are possible in the light of above disclosure.

LIST OF REFERENCE NUMERALS

100
101
102A
102B
200
201A
201B
202
300
301
302
303
304
305

Vehicle
Internal combustion engine
Primary fuel storage
Secondary fuel storage
Fuel control system
Primary fuel control device
Secondary fuel control device
Control unit
Fuel control method
Switching on
Initiating
Detecting
Shifting
Operating
, Claims:We Claim:
1. A fuel control system (200) for a vehicle (100), the fuel control system (200) comprising:
one or more fuel control devices (201A, 201B), the one or more fuel control devices (201A, 201B) being coupled to an internal combustion engine (101) of the vehicle (100), the one or more fuel control devices (201A, 201B) being configured to regulate a supply of at least one of a primary fuel and a secondary fuel to the internal combustion engine (101),
the internal combustion engine (101) being configured to operate in at least one of a primary fuel mode and a secondary fuel mode; and
a control unit (202), the control unit (202) being configured to continuously monitor a plurality of first parameters and a plurality of second parameters of the internal combustion engine (101) upon an operational initiation of the internal combustion engine (101) in the secondary fuel mode,
the control unit (202) being configured to detect a stabilized operation of the internal combustion engine (101) in the secondary fuel mode upon a satisfaction of the plurality of first parameters of the internal combustion engine (101), and
the control unit (202) being configured to shift from the secondary fuel mode to the primary fuel mode upon a satisfaction of the plurality of second parameters of the internal combustion engine (101).
2. The fuel control system (200) for the vehicle (100) as claimed in claim 1, wherein
the one or more fuel control devices (201A, 201B) comprising a secondary fuel control device (201B); and
the control unit (202) being configured to control the secondary fuel control device (201B), the secondary fuel control device (201B) being configured to regulate a supply of the secondary fuel from a secondary fuel storage (102B) to a fuel intake of the internal combustion engine (101) in the secondary fuel mode.
3. The fuel control system (200) for the vehicle (100) as claimed in claim 2, wherein the control unit (202) being configured to restrict the supply of the secondary fuel through the secondary fuel control device (201B) upon the detection of the stabilized operation of the internal combustion engine (101).
4. The fuel control system (200) for the vehicle (100) as claimed in claim 3, wherein the secondary fuel is a gasoline fuel and the secondary fuel control device (201B) is a carburetor.
5. The fuel control system (200) for the vehicle (100) as claimed in claim 1, wherein:
the one or more fuel control devices (201A, 201B) comprising a primary fuel control device (201A);
the control unit (202) being configured to control the primary fuel control device (201A); and
the primary fuel control device (201A) being configured to regulate a supply of the primary fuel from a primary fuel storage (102A) to a fuel intake of the internal combustion engine (101) in the primary fuel mode.
6. The fuel control system (200) for the vehicle (100) as claimed in claim 5, wherein the control unit (202) being configured to allow the supply of the primary fuel through the primary fuel control device (201A) upon the satisfaction of the plurality of second parameters.
7. The fuel control system (200) for the vehicle (100) as claimed in claim 6, wherein the primary fuel is a gaseous fuel and the primary fuel control device (201A) is a gas solenoid.
8. The fuel control system (200) for the vehicle (100) as claimed in claim 1, wherein
the control unit (202) is an Engine Control Unit;
the plurality of first parameters comprising an engine speed, a throttle position, an engine pressure, an engine temperature and a vehicle speed; and
the plurality of secondary parameters comprising an oxygen level and an engine crank position.
9. A fuel control method (300) for a vehicle (100), the fuel control method (300) comprising a plurality of steps of:
switching on (301), an ignition of an internal combustion engine (101);
initiating (302), an operation of the internal combustion engine (101) in a secondary fuel mode;
detecting (303), a stabilized operation of the internal combustion engine (101) by a control unit (202) upon a satisfaction of a plurality of first parameters of the internal combustion engine (101); the plurality of first parameters being continuously monitored by the control unit (202);
shifting (304), the operation of the internal combustion engine (101) from the secondary fuel mode to a primary fuel mode by the control unit (202) upon a satisfaction of a plurality of second parameters of the internal combustion engine (101); the plurality of second parameters being continuously monitored by the control unit (202); and
operating (305), the internal combustion engine (101) in the primary fuel mode.
10. The fuel control method (300) for the vehicle (100) as claimed in claim 9, wherein a supply of a secondary fuel from a secondary fuel storage (102B) to a fuel intake of the internal combustion engine (101) in the secondary fuel mode is regulated by a secondary fuel control device (201B), the secondary fuel control device (201B) is controlled by the control unit (202).
11. The fuel control method (300) for the vehicle (100) as claimed in claim 10, wherein shifting (304) the operation of the internal combustion engine (101) from the secondary fuel mode to the primary fuel mode by the control unit (202) includes a step of restricting the supply of the secondary fuel by the control unit (202) through the secondary fuel control device (201B) upon detecting (303) the stabilized operation of the internal combustion engine (101).
12. The fuel control method (300) for the vehicle (100) as claimed in claim 9, wherein a supply of a primary fuel from a primary fuel storage (102A) to a fuel intake of the internal combustion engine (101) in the primary fuel mode is regulated by a primary fuel control device (201A), the primary fuel control device (201A) being controlled by the control unit (202).
13. The fuel control method (300) for the vehicle (100) as claimed in claim 12, wherein shifting (304) the operation of the internal combustion engine (101) from the secondary fuel mode to the primary fuel mode by the control unit (202) includes a step of allowing the supply of the primary fuel by the control unit (202) through the primary fuel control device (201A) upon the satisfaction of the plurality of second parameter.

Dated this 22nd day of March, 2024

(Digitally Signed)
Sudarshan Singh Shekhawat
IN/PA-1611
Agent for the Applicant