Description:AIR-COOLED INTERNAL COMBUSTION ENGINE WITH COMMON RAIL FUEL INJECTION SYSTEM AND METHOD THEREOF
FIELD OF INVENTION
The present invention relates to an engine, more particularly, an air-cooled internal combustion engine with high pressure common rail fuel injection system. The common rail fuel injection system enables meeting stringent emission norms with better fuel efficiency while being air cooled engine configuration enables reduced parasitic losses and lower cost compared to water cooled common rail engine.
BACKGROUND OF THE INVENTION
Diesel engine is a type of internal combustion engine used for various applications such as in vehicles, and industrial generators etc. Fuel ignition occurs due to the increase in air temperature due to mechanical compression, thus the diesel engine is also known as a compression-ignition engine (CI engine). Conventionally, water cooled system is used for cooling the diesel engine. The water-cooled system swaps out cooling fins for passageways through engine block, cylinders and cylinder head through which coolant flows. A water pump forces the coolant through the engine passageways, and a thermostat control when the coolant is released from the engine, usually once it reaches a certain temperature. Once the coolant is released from the engine, it flows into the radiator where the heat is extracted from the coolant and transferred out of the system via the radiator’s own set of cooling fins. Fans are attached to the radiator to help blow air across these fins.
Air cooled engines always have cost advantage & reduced parasitic losses over water cooled engines. Today’s world, common rail system has become necessary to meet stringent emission norms. The whole industry is going with common rail on water cooled engines with control parameters in reference with coolant temperature. However, an air-cooled common rail engine has not been developed yet.
The current invention discloses an air-cooled engine adopting the common rail electronically controlled fuel injection system by means of controlling parameters with reference to oil temperature.
The water-cooled engine has the disadvantage of parasitic losses of power by water pump and radiator fan.
To overcome the above disadvantages, there is a need for an air-cooled engine with electronically controlled high pressure common rail fuel injection system.
Some of the prior arts are:
JP2009013835A discloses an air-cooled engine comprising an oil jacket 47 that is a flow passage of the engine oil to a valve train mechanism 30 in the cylinder head 27. An oil reservoir 51 is formed to be recessed for retaining the engine oil in a wall part of the oil jacket 47, and an oil temperature sensor 55 is mounted on the cylinder head 27 for detecting the oil temperature inside the oil reservoir 51.
CN112648121A, discloses a fuel injection single-cylinder electronic control pump of small air-cooled single-cylinder diesel engine comprising a pump body, wherein a guide sleeve is fixedly connected to the lower side of the pump body; a fixed seat is fixedly connected to the outer wall of the guide sleeve; a fixing hole is arranged in the fixed seat; a sliding seat is slidable connected into the guide sleeve; a groove is arranged in the upper side of the sliding seat; a reset spring is fixedly connected to the middle of the lower end of the pump body; the lower side of the reset spring is located in the groove; a cam pushing groove is arranged in the lower side of the sliding seat; a plunger cavity is arranged in the middle of the lower side of the pump body; a plunger is arranged in the plunger cavity; and the lower end of the plunger is fixedly connected to a plunger rod.
JP2003042034A, discloses an upper structure of air-cooled engine comprising the high- pressure pipe 19 for communicating the fuel injection nozzle 30 with the fuel injection pump 12 is disposed in a space formed of a bonnet 7, a fuel tank 9, and the cylinder head 6.
However, the conventional air-cooled diesel engines as discussed in the prior art requires relatively large amount of power used to drive the cooling fan, gives low power output, and does not meet emission norms.
Accordingly, there is a need for an improved air-cooled system with high pressure common rail fuel injection system for multi-cylinder internal combustion engine, which protects the engine from overheat without compromising the engine power and fuel efficiency at all operational levels.
OBJECT OF THE INVENTION
The main objective of the present invention is to provide an air-cooled internal combustion engine with high pressure common rail fuel injection system, and this system is protected from overheating of liner which may lead to seizure. The above objective is achieved without compromising the engine power and fuel efficiency across its operational levels, while still meeting stringent emission norms.
Another objective of the present invention is to provide an air-cooled internal combustion engine, which does not require a complex conventional cooling system with coolant, radiators, pumps, and hoses.
Another objective of the present invention is to provide an air-cooled internal combustion engine, which facilitates the transfer of heat from the engine components to the surrounding air.
Another objective of the present invention is to provide an air-cooled internal combustion engine, which guides the flow of air through specific areas of the engine, thus ensuring efficient cooling.
SUMMARY OF THE INVENTION
It is a primary aspect of the present invention to provide an air-cooled internal combustion engine (200) with high pressure common rail fuel injection system (16), comprising: an engine block (100) comprising a plurality of cylinders (1), a plurality of pistons (2), a cylinder head (3), a crank case (4), a plurality of connecting rods (5), a camshaft (6), and a crankshaft (7), wherein the cylinders (1) are cylindrical chambers in which movement of the piston (2) takes place, where the top end of the cylinder (1) is closed by the cylinder head (3), and bottom end of the cylinder (1) is opened and bolted with crank case (4) which surrounds the crankshaft (7) and enclosing it while it rotates, wherein the pistons (2) are connected to the crankshaft (7) through the plurality of connecting rods (5) which converts the reciprocating motion of the piston (2) into rotary motion of the crankshaft (7), wherein first end of the connecting rod (5) is connected to the crankshaft (7), and second end of the connecting rod (5) is connected to the piston (2) by using a piston pin, and an electronically controlled high pressure common rail fueling system (16), wherein the air-cooled internal combustion engine, comprises:
a. a plurality of fans (10) housed in respective housing (15), connected in series and/or parallel with the engine block (100), wherein said fans (10) comprising rotating blades which draw air from the surroundings and force it into the engine block (100), and expel it radially outward,
b. at least two air ducts (8, 9), comprising a first air duct (8) located in the cylinder head (3), and a second air duct (9) is located in the engine block (100) to introduce cool air into the cylinder head (3), and the engine block (100) to cool them,
c. a filter (11) is positioned at the air intake of the fans (10) allows air to pass through while preventing debris from entering the engine;
d. a plurality of cooling fins (12) positioned surrounding the cylinders (1) and cylinder heads (3) respectively; and
e. a drive shaft (13) connected to the crankshaft (7) to drive the fans (10) through a belt-driven pulley (14),
f. a electronically controlled high pressure common rail high pressure fueling system (16) connected to a high-pressure holding chamber (17) pressurized through a fuel injection pump (16b),
wherein the air-cooled internal combustion engine gives better brake thermal efficiency by reducing parasitic losses of a conventional full-scale coolant-based cooling system and eliminates the requirement of radiator and its connection for water cooled system.
Another aspect of the present invention to provide a method of operating the air-cooled internal combustion engine (200), said method comprising:
a. igniting the engine to rotate the crankshaft (7), thus the rotational power from crank shaft is transferred to the drive pulley (13) through the belt-driven pulley or other means of transmission (14);
b. transferring the power to the fans (10) through the drive pulley (13), rotating at the same or different speed as the engine;
c. drawing air from the surroundings and forcing it into the engine block (100) by the fans (10);
d. passing the incoming air through the filter (11) to prevent debris from entering the engine and potentially causing damage;
e. allowing air to flow over the cooling fins (12) positioned surrounding the cylinders (1) and cylinder heads (3), where the increased surface area of the cooling fins (12) allows for efficient heat dissipation into the surrounding air, and
f. absorbing heat from the engine block (100) through the air flown over the cooling fins (12), thus the engine block (100) becomes cooler and hot air is expelled radially outward by the fans (10), thereby continuous circulation of air flow aids cooling the engine to maintain optimal operating temperatures to prevent overheating of the engine.
Yet another aspect of the present invention to provide a method of operating the air-cooled internal combustion engine (200), said method comprising:
a. providing a electronically controlled high pressure common rail high pressure fueling system (16) to cater for required injection pressures, timings and quantity controlled dynamically;
b. configuring an engine control unit (16i) as a central control system for handling the fuel injection parameters, and
c. configuring an arrangement of transferring and receiving electrical control signals to respective actuators and control parameters.
Another aspect of the present invention is to provide a method operating the air-cooled internal combustion engine (200), said method comprising a common rail high pressure electronically controlled fueling system (16) comprising:
a. operating the high-pressure fuel injection pump (16b) by drawing power from the brake power available at the crank shaft (7);
b. connecting the high-pressure fuel injection pump (16b) to the crank shaft (7) with gears, belts, chain or other suitable means of power transfer;
c. configuring the high-pressure fuel injection pump (16b) to receive conditioned fuel from the fuel filter (16f) or feed pump;
d. providing the high-pressure fuel injection pump (16b) with electronic sensors and actuators to control the pressure and flow of the fuel;
e. connecting the fuel pump sensors and actuators are connected to the control unit (16i) by wires and electrical connectors;
f. delivering the pressurized fuel from the high-pressure fuel injection pump (16b) at high pressure to a common rail by high pressure pipe (16c);
g. configuring the common rail with or without pressure and/or temperature sensor to store the pressurized fuel;
h. connecting the common rail sensor to the control unit (16i) by wires and electrical connectors;
i. transferring the high-pressure fuel stored in the common rail to injection nozzle (16d) by high pressure pipe (16c) delivering high pressure fuel to each injection nozzle (16d);
j. injecting high pressure fuel by injection nozzle (16d) at appropriate timing and in appropriate quantity to the inducted fresh charge either directly on the piston (2) or on the port
k. providing the injection nozzle (16d) with fuel pressure and flow sensor along with an actuator connected to the control unit (16i) by electrical wires and connectors;
l. controlling the timing and quantity of fuel being injected by the control unit (16i).
m. providing the fuel system (16) with temperature sensor connected to the control unit (16i) monitors the liner temperature, and
n. controlling the fuel amount and timing based on sensor signals by programing and calibrating the control unit (16i) such that engine operates under predefined temperature limits at its various critical locations, therefore stringent emission norms are met.
BRIEF DESCRIPTION OF DRAWINGS
The embodiment of the present invention is illustrated with the help of accompanying drawings.
Figure 1 illustrates a view of an air-cooled internal combustion engine according to the present invention.
Figure 2 illustrates an internal view of the internal combustion engine according to the present invention.
Figure 3 illustrates a view of an electronically controlled high pressure common rail fueling system of the air-cooled internal combustion engine according to the present invention.
Figure 4 illustrates a circuit diagram of an electronically controlled high pressure common rail fueling system of the air-cooled internal combustion engine according to the present invention.

DETAILED DESCRIPTION OF THE INVENTION
The present invention as embodied by “an air-cooled internal combustion engine and method thereof” succinctly fulfills the above-mentioned need[s] in the art. The present invention has objective[s] arising as a result of the above-mentioned need[s], said objective[s] having been enumerated here in above.

The following description is directed to an air-cooled internal combustion engine and a method thereof as much as the objective(s) of the present invention are enumerated, it will be obvious to a person skilled in the art that, the enumerated objective(s) are not exhaustive of the present invention in its entirety, and are enclosed solely for the purpose of illustration. Further, the present invention encloses within its scope and purview, any structural alternative(s) and/or any functional equivalent(s) even though, such structural alternative(s) and/or any functional equivalent(s) are not mentioned explicitly herein or elsewhere, in the present disclosure. The present invention therefore encompasses also, any improvisation[s]/modification[s] applied to the structural alternative[s]/functional alternative[s] within its scope and purview. The present invention may be embodied in other specific form[s] without departing from the essential attributes thereof.
Furthermore, the terms and phrases used herein are not intended to be limiting, but rather are to provide an understandable description. Throughout this specification, the use of the word "comprise" and variations such as "comprises" and "comprising" may imply the inclusion of an element or elements not specifically recited.
Conventional water pumps system with radiator fan consumes 5-6% more power. The present invention provides an air-cooled internal combustion engine, with an electronically controlled high pressure common rail fueling system, which operates with high brake thermal efficiency, and meets emission norms, such that the engine is further protected from overheating.

Referring to Figures 1 and 2, in an embodiment of the present invention, the air-cooled internal combustion engine (200), comprising: an engine block (100) comprising a plurality of cylinders (1), a plurality of pistons (2), a cylinder head (3), a crank case (4), a plurality of connecting rods (5), a camshaft (6), a crankshaft (7), and, wherein the cylinders (1) are cylindrical chambers in which movement of the piston (2) takes place, where the top end of the cylinder (1) is closed by the cylinder head (3), and bottom end of the cylinder (1) is opened and bolted with crank case (4) which surrounds the crankshaft (7) and enclosing it while it rotates, wherein the pistons (2) are connected to the crankshaft (7) through the plurality of connecting rods (5) which converts the reciprocating motion of the piston (2) into rotary motion of the crankshaft (7), wherein first end of the connecting rod (5) is connected to the crankshaft (7), and second end of the connecting rod (5) is connected to the piston (2) by using a piston pin, an electronically controlled high pressure common rail fueling system (16), Characterized in that: the air-cooled internal combustion engine, comprises: a plurality of fans (10) housed in respective housing (15), connected in series and/or parallel with the engine block (100), wherein said fans (10) comprising rotating blades which draw air from the surroundings and force it into the engine block (100), and expel it radially outward, at least two air ducts (8, 9), comprising a first air duct (8) located in the cylinder head (3), and a second air duct (9) is located in the engine block (100) to introduce cool air into the cylinder head (3), and the engine block (100) to cool them, a filter (11) is positioned at the air intake of the fans (10) allows air to pass through while preventing debris from entering the engine; a plurality of cooling fins (12) positioned surrounding the cylinders (1) and cylinder heads (3) respectively; and a drive shaft (13) connected to the crankshaft (7) to drive the fans (10) through a belt-driven pulley (14), wherein the air cooled internal combustion engine gives better break thermal efficiency by reducing parasitic losses of a conventional full scale coolant based cooling system and eliminates the requirement of radiator and its connection for water cooled system.
In the preferred embodiment of the present invention, the air ducts (8, 9) are designed to guide the flow of air through specific areas of the engine, ensuring efficient cooling.
In the preferred embodiment of the present invention, the cooling fins (12) increase the surface area exposed to air, facilitating the transfer of heat from the engine components to the surrounding air.
In the preferred embodiment of the present invention, the plurality of fans (10) is a centrifugal fan.
In the preferred embodiment of the present invention, the plurality of fans (10) is selected from axial fans, blowers, and electric fans, mixed or any combination thereof.
In the preferred embodiment of the present invention, the filter (11) is a wire mesh filter.
In the preferred embodiment of the present invention, the filters are paper filter, foam etc.
In the preferred embodiment of the present invention, the cooling fins (12) are selected from cylinder block fins, cylinder head fins, and crankcase or oil sump fins.
In the preferred embodiment of the present invention, the electronically controlled high pressure common rail fueling system (16) comprising a fuel tank (16a), a fuel injection pump (16b), a high-pressure pipe (16c), an injection nozzle (16d), a lift pump (16e), a fuel filter (16f), a plurality of sensing modules (16g), an injector coil (16h), and a control unit (16i).
In the preferred embodiment of the present invention, the fuel tank (16a) is a reservoir that holds fuel to run the vehicle and delivers the fuel to the fuel injection pump (16b) by the lift pump (16e).
In the preferred embodiment of the present invention, the lift pump (16e) sucks fuels from the fuel tank (16a) and attached to the fuel injection pump (16b) and driven by the camshaft (6).
In the preferred embodiment of the present invention, the fuel injection pump (16b), connected to the injection nozzle (16d), increases the pressure of the diesel fuel from very low values from the lift pump to the extremely high pressures needed for injection, and sends high pressure fuel to the injection nozzle (16d) using the high-pressure pipe (16c).
In the preferred embodiment of the present invention, the injection nozzle (16d) injects the fuel into the hot compressed air in the cylinder (1), thus the fuel is burned with an explosion, then the gas expands and moves the piston (2) down and power is produced.
In the preferred embodiment of the present invention, the fuel filter (16f) is located between the fuel tank (16a) and the fuel injection pump (16b) to filtrate fuel, and protects the engine from harmful debris.
In the preferred embodiment of the present invention, the control unit (16i) determines the precise amount and specific timing of required fuel does for every cycle, by collecting information from the plurality of sensing modules (16g) located on the engine block, and sends a command electrical signal of the duration and timing to the injector coil (16h), thus the injection nozzle (16d) opens and allows the fuel to pass through it into the cylinder (2).
In the preferred embodiment of the present invention, the one terminal of the injector coil (16h) is directly supplied by 12 volts through a battery which are controlled by the control unit (16i), and the other terminal of the injector coil (16h) is open. When control unit (16i) determines the exact amount of fuel and when to inject it, the appropriate injector nozzle (16d) is activated by switching the other terminal to the ground.
Another embodiment of the present invention to provide a method of operating the air-cooled internal combustion engine (200), said method comprising:
a. igniting the engine (200) to rotate the crankshaft (7), thus the rotational power from crank shaft is transferred to the drive pulley (13) through the belt-driven pulley (14);
b. transferring the power to the fans (10) through the drive pulley (13), rotating at the same speed as the engine;
c. drawing air from the surroundings and forcing it into the engine block (100) by the fans (10);
d. passing the incoming air through the filter (11) to prevent debris from entering the engine and potentially causing damage;
e. allowing air to flow over the cooling fins (12) positioned surrounding the cylinders (1) and cylinder heads (3), where the increased surface area of the cooling fins (12) allows for efficient heat dissipation into the surrounding air;
f. absorbing heat from the engine block (100) through the air flown over the cooling fins (12), thus the engine block (100) becomes colder and hot air is expelled radially outward by the fans (10), thereby continuous circulation of air flow aids cooling the engine (200) to maintain optimal operating temperatures to prevent overheating of the engine (200).
g. real-time adaptive corrections for high temperature atmosphere operations through control unit (16i) in form of electrical signals
Yet another embodiment of the present invention is to provide a method of operating the air-cooled internal combustion engine (200), said method comprising:
a. providing a electronically controlled high pressure common rail high pressure fueling system (16) to cater for required injection pressures, timings and quantity controlled dynamically;
b. configuring an engine control unit (16i) as a central control system for handling the fuel injection parameters, and
c. configuring an arrangement of transferring and receiving electrical control signals to respective actuators and control parameters.
Another embodiment of the present invention is to provide a method comprising electronically controlled high pressure common rail high pressure fueling system (16) comprising:
a. operating the high-pressure fuel injection pump (16b) by drawing power from the brake power available at the crank shaft (7);
b. connecting the high-pressure fuel injection pump (16b) to the crank shaft (7) with gears, belts, chain or other suitable means of power transfer;
c. configuring the high-pressure fuel injection pump (16b) to receive conditioned fuel from the fuel filter (16f) or feed pump;
d. providing the high-pressure fuel injection pump (16b) with electronic sensors and actuators to control the pressure and flow of the fuel;
e. connecting the fuel pump sensors and actuators are connected to the control unit (16i) by wires and electrical connectors;
f. delivering the pressurized fuel from the high-pressure fuel injection pump (16b) at high pressure to a common rail by high pressure pipe (16c);
g. configuring the common rail with or without pressure and/or temperature sensor to store the pressurized fuel;
h. connecting the common rail sensor to the control unit (16i) by wires and electrical connectors;
i. transferring the high-pressure fuel stored in the common rail to injection nozzle (16d) by high pressure pipe (16c) delivering high pressure fuel to each injection nozzle (16d);
j. injecting high pressure fuel by injection nozzle (16d) at appropriate timing and in appropriate quantity to the inducted fresh charge either directly on the piston (2) or on the port
k. providing the injection nozzle (16d) with fuel pressure and flow sensor along with an actuator connected to the control unit (16i) by electrical wires and connectors;
l. controlling the timing and quantity of fuel being injected by the control unit (16i).
m. providing the fuel system (16) with temperature sensor connected to the control unit (16i) monitors the liner temperature, and
n. controlling the fuel amount and timing based on sensor signals by programing and calibrating the control unit (16i) such that engine operates under predefined temperature limits at its various critical locations, therefore stringent emission norms are met.

For Illustration:
WORKING
The fuel tank (16a) delivers the fuel to the fuel injection pump (16b) by the lift pump (16e). The lift pump (16e) sucks fuels from the fuel tank (16a) and attached to the fuel injection pump (16b) and driven by the camshaft (6). The fuel injection pump (16b), connected to the injection nozzle (16d), increases the pressure of the diesel fuel from very low values from the lift pump to the extremely high pressures needed for injection, and sends high pressure fuel to the injection nozzle (16d) using the high-pressure pipe (16c). The injection nozzle (16d) injects the fuel into the hot compressed air in the cylinder (1), thus the fuel is burned with an explosion, then the gas expands and moves the piston (2) down and power is produced. The fuel filter (16f) is located between the fuel tank (16a) and the fuel injection pump (16b) to filtrates fuel and protects the engine (200) from harmful debris. The control unit (16i) determines the precise amount and specific timing of required fuel does for every cycle, by collecting information from the plurality of sensing modules (16g) located on the engine block and sends a command electrical signal of the duration and timing to the injector coil (16h), thus the injection nozzle (16d) opens and allows the fuel to pass through it into the cylinder (2). The one terminal of the injector coil (16h) is directly supplied by 12 volts which are controlled by the control unit (16i), and the other terminal of the injector coil (16h) is open. When control unit (16i) determines the exact amount of fuel and when to inject it, the appropriate injector nozzle (16d) is activated by switching the other terminal to the ground.

The engine (200) is ignited to rotate the crankshaft (7), thus the rotational power from crank shaft is transferred to the drive pulley (13) through the belt-driven pulley (14). The power is transferred to the fans (10) through the drive pulley (13), rotating at the same speed as the engine (200). The air is drawn from the surroundings and forced into the engine block (100) by the fans (10). The incoming air through the filter (11) is passed to prevent debris from entering the engine (200) and potentially causing damage. The air is allowed to flow over the cooling fins (12) positioned surrounding the cylinders (1) and cylinder heads (3), where the increased surface area of the cooling fins (12) allows for efficient heat dissipation into the surrounding air. The heat is absorbed from the engine block (100) through the air flown over the cooling fins (12), thus the engine block (100) becomes warmer and hot air is expelled radially outward by the fans (10), thereby continuous circulation of air flow aids cooling the engine (200) to maintain optimal operating temperatures to prevent overheating of the engine (200).

ADVANTAGES OF THE PRESENT INVENTION
1. The present invention adapts common rail fuelling system onto an air-cooled engine which gives better fuel economy, at reduced cost compared to a water cooled variant.
3. The present invention provides better brake thermal efficiency by reducing parasitic losses of a conventional full-scale coolant-based cooling system and reduce the system complexity of radiator and its connection for water cooled system, that will also result in cost benefit.
4. The present invention provides continuous flow of air circulation to cool the engine and maintain optimal operating temperatures, preventing overheating.
5. The present invention is simpler in design and construction and has less weight.
It will be apparent to a person skilled in the art that the above description is for illustrative purposes only and should not be considered as limiting. Various modifications, additions, alterations, and improvements without deviating from the spirit and the scope of the invention may be made by a person skilled in the art.

List of Reference Numerals
(1) Cylinders
(2) Pistons
(3) Cylinder head
(4) Crank case
(5) Connecting rods
(6) Camshaft
(7) Crankshaft
(8) First air duct
(9) Second air duct
(10) Fans
(11) Filter
(12) Cooling fins
(13) Drive shaft
(14) Belt-driven pulley
(15) Housing
(16) Electronically controlled high pressure common rail fueling system
(16a) Fuel tank
(16b) Fuel injection pump
(16c) High pressure pipe
(16d). Injection nozzle
(16e). Lift pump
(16f) Fuel filter
(16g) Sensing modules
(16h) Injector coil
(16i) Control unit
(17) High pressure holding chamber
(100) Engine block
(200) Air-cooled internal combustion engine.

, Claims:WE CLAIM:
1. An air-cooled internal combustion engine (200) with common rail fuel injection system, comprising: an engine block (100) comprising a plurality of cylinders (1), a plurality of pistons (2), a cylinder head (3), a crank case (4), a plurality of connecting rods (5), a camshaft (6), a crankshaft (7), and, wherein the cylinders (1) are cylindrical chambers in which movement of the piston (2) takes place, where the top end of the cylinder (1) is closed by the cylinder head (3), and bottom end of the cylinder (1) is opened and bolted with crank case (4) which surrounds the crankshaft (7) and enclosing it while it rotates, wherein the pistons (2) are connected to the crankshaft (7) through the plurality of connecting rods (5) which converts the reciprocating motion of the piston (2) into rotary motion of the crankshaft (7), wherein first end of the connecting rod (5) is connected to the crankshaft (7), and second end of the connecting rod (5) is connected to the piston (2) by using a piston pin, an electronically controlled high pressure common rail fueling system (16),
Characterized in that: the air-cooled internal combustion engine, comprises:
a. a plurality of fans (10) housed in respective housing (15), connected in series and/or parallel with the engine block (100), wherein said fans (10) comprising rotating blades which draw air from the surroundings and force it into the engine block (100), and expel it radially outward,
b. at least two air ducts (8, 9), comprising a first air duct (8) located in the cylinder head (3), and a second air duct (9) is located in the engine block (100) to introduce cool air into the cylinder head (3), and the engine block (100) to cool them,
c. a filter (11) is positioned at the air intake of the fans (10) allows air to pass through while preventing debris from entering the engine;
d. a plurality of cooling fins (12) positioned surrounding the cylinders (1) and cylinder heads (3) respectively; and
e. a drive shaft (13) connected to the crankshaft (7) to drive the fans (10) through a belt-driven pulley (14),
Wherein the air-cooled internal combustion engine gives better break thermal efficiency by reducing parasitic losses of a conventional full scale coolant based cooling system and eliminates the requirement of radiator and its connection for water cooled system.

2. The air-cooled internal combustion engine as claimed in claim 1, wherein the air ducts (8, 9) are designed to guide the flow of air through specific areas of the engine, ensuring efficient cooling.

3. The air-cooled internal combustion engine as claimed in claim 1, wherein the cooling fins (12) increase the surface area exposed to air, facilitating the transfer of heat from the engine components to the surrounding air.

4. The air-cooled internal combustion engine as claimed in claim 1, wherein the plurality of fans (10) are a centrifugal fans.

5. The air-cooled internal combustion engine as claimed in claim 1, wherein the filter (11) is a wire mesh filter.

6. The air-cooled internal combustion engine as claimed in claim 1, wherein the electronically controlled high pressure common rail fueling system (16) comprising a fuel tank (16a), a fuel injection pump (16b), a high-pressure pipe (16c), an injection nozzle (16d), a lift pump (16e), a fuel filter (16f), a plurality of sensing modules (16g), an injector coil (16h), and a control unit (16i).

7. A method of operating the air-cooled internal combustion engine (200) as claimed in claim 1, said method comprising:
a. igniting the engine (200) to rotate the crankshaft (7), thus the rotational power from crank shaft is transferred to the drive pulley (13) through the belt-driven pulley (14);
b. transferring the power to the fans (10) through the drive pulley (13), rotating at the same speed as the engine (200);
c. drawing air from the surroundings and forcing it into the engine block (100) by the fans (10);
d. passing the incoming air through the filter (11) to prevent debris from entering the engine (200) and potentially causing damage;
e. allowing air to flow over the cooling fins (12) positioned surrounding the cylinders (1) and cylinder heads (3), where the increased surface area of the cooling fins (12) allows for efficient heat dissipation into the surrounding air;
f. absorbing heat from the engine block (100) through the air flown over the cooling fins (12), thus the engine block (100) becomes warmer and hot air is expelled radially outward by the fans (10), thereby continuous circulation of air flow aids cooling the engine (200) to maintain optimal operating temperatures to prevent overheating of the engine (200).
8. The method as claimed in claim 7, said method comprising steps of:
a. providing a high-pressure common rail fuel injection system (16) to cater for required injection pressures, timings and quantity controlled dynamically;
b. configuring an engine control unit (16i) as a central control system for handling the fuel injection parameters, and
c. configuring an arrangement of transferring and receiving electrical control signals to respective actuators and control parameters.
9. The method as claimed in claim 7, said method comprising an electronically controlled high pressure common rail high pressure fueling system (16) comprising:
a. operating the high-pressure fuel injection pump (16b) by drawing power from the brake power available at the crank shaft (7);
b. connecting the high-pressure fuel injection pump (16b) to the crank shaft (7) with gears, belts, chain or other suitable means of power transfer;
c. configuring the high-pressure fuel injection pump (16b) to receive conditioned fuel from the fuel filter (16f) or feed pump;
d. providing the high-pressure fuel injection pump (16b) with electronic sensors and actuators to control the pressure and flow of the fuel;
e. connecting the fuel pump sensors and actuators are connected to the control unit (16i) by wires and electrical connectors;
f. delivering the pressurized fuel from the high-pressure fuel injection pump (16b) at high pressure to a common rail by high pressure pipe (16c);
g. configuring the common rail with or without pressure and/or temperature sensor to store the pressurized fuel;
h. connecting the common rail sensor to the control unit (16i) by wires and electrical connectors;
i. transferring the high-pressure fuel stored in the common rail to injection nozzle (16d) by high pressure pipe (16c) delivering high pressure fuel to each injection nozzle (16d);
j. injecting high pressure fuel by injection nozzle (16d) at appropriate timing and in appropriate quantity to the inducted fresh charge either directly on the piston (2) or on the port
k. providing the injection nozzle (16d) with fuel pressure and flow sensor along with an actuator connected to the control unit (16i) by electrical wires and connectors;
l. controlling the timing and quantity of fuel being injected by the control unit (16i).
m. providing the fuel system (16) with temperature sensor connected to the control unit (16i) monitors the liner temperature, and
n. controlling the fuel amount and timing based on sensor signals by programing and calibrating the control unit (16i) such that engine operates under predefined temperature limits at its various critical locations, therefore stringent emission norms are met.

Dated this 20th day of October, 2023 Kalyanchand Jhabakh (IN/PA-830)
Agent for Applicant