AN APPARATUS FOR SYNCHRONIZING OPERATION OF FLYWHEEL AND FUEL INJECTION UNIT OF AN ENGINE
FIELD
[0001] The present disclosure relates to the field of internal combustion engines. In particular, the present disclosure relates to an apparatus for optimizing fuel injection timing of an internal combustion engine.
BACKGROUND
[0002] Conventionally, the injection timing of an internal combustion engine is susceptible to disruption over prolonged operational life of the engine. The disruption in the injection timing can be caused by a number of factors. One exemplary reason of the disruption of the fuel injection timing is the wear and tear of the manifolds. An aftereffect of faulty fuel injection timing is misfiring of the engine and extremely violent or rough engine idle. Both of these causes can result in inefficient combustion of the fuel, which in turn increases the harmful emissions released by the engine. This is not desired.
[0003] There is, therefore, felt a need for a system or an apparatus for optimizing or maintaining the fuel injection timing of the engine.
SUMMARY
[0004] The present disclosure envisages an apparatus for synchronizing operation of a flywheel and a fuel injection unit of an internal combustion engine. The apparatus comprises a first system. The first system includes the flywheel coupled to a crankshaft of the

internal combustion engine; a first hole configured on the flywheel at a first location; a flywheel housing to house the flywheel; a second hole configured on the flywheel housing at a second location; a pin fitted into one of the first hole and the second hole. The first hole and the second hole are configured to align with each other when a piston of the internal combustion engine is at a top dead center of an engine cylinder of the internal combustion engine, thereby locking the motion of the flywheel via the pin being engaged in the first and the second holes and causing the piston to remain at the top dead center.
[0005] The apparatus further comprises the second system. The second system includes a fuel injection pump housed in a fuel injection housing; a third hole configured on the fuel injection housing at a third location; a sleeve configured to fit into the third hole; a pin disposed within and resiliently held by the sleeve; a first attachment fitted on a camshaft of the Fuel Injection Pump; a fourth hole configured on the first attachment. The pin is configured to engage with the fourth hole on the first attachment to lock the movement of the camshaft of FIP while the piston of the internal combustion engine is at the top dead center to keep the fuel injection delivery time at desired position with respect to piston’s top dead center the engine in an open state for allowing efficient fuel injection to meet the desired performance and emission requirements.
[0006] In accordance with the present invention, the first system and the second system operate in conjunction, when the piston of the internal combustion engine is at the top dead center.
[0007] In an embodiment, the flywheel is mounted on a flywheel flange configured on a crankshaft of the internal combustion engine.

[0008] In an embodiment, the sleeve has thread formations configured on an outer periphery thereof.
[0009] In an embodiment, the apparatus further comprises a cap fitted to an end of the sleeve that is received within the third hole.
[0010] In an embodiment, the apparatus further comprises a helical spring and a circlip disposed within the cap and operatively between the cap and sleeve.
[0011] In an embodiment, the apparatus further comprises a viewing window configured on the flywheel housing at an operative top end thereof.
[0012] In an embodiment, the first attachment is a circular disc.
BRIEF DESCRIPTION OF DRAWING
[0013] The aspects and other features of the subject matter will be better understood with regard to the following description, appended claims, and accompanying figures. The use of the same reference number in different figures indicates similar or identical items.
[0014] Fig. 1 illustrates schematic views of a first system of an apparatus for synchronizing operation of a flywheel and a fuel injection unit of an internal combustion engine, in accordance with an embodiment of the present invention.
[0015] Fig. 2 illustrates a schematic view of a second system of an apparatus for synchronizing operation of a flywheel and a fuel injection unit of an internal combustion engine, in accordance with an embodiment of the present invention.

DETAILED DESCRIPTION
[0016] The present disclosure envisages an apparatus for optimizing the fuel injection timing of an internal combustion engine. The apparatus comprises a first system and a second system. The function of the first system is to lock the movement of a piston of the engine within an engine cylinder of the engine, when the piston reaches the top dead center of the engine cylinder. At this instant, the second system is configured to lock the rotation of a camshaft of the engine to hold the intake manifold in an open state to allow efficient fuel injection in the engine cylinder. The configuration and operation of the first system and the second system is described hereinafter in the present disclosure.
[0017] Fig. 1 illustrates schematic views of a first system 50 of an apparatus 100 for synchronizing operation of a flywheel 11 and a fuel injection unit of an internal combustion engine, in accordance with an embodiment of the present invention. The first system 50 includes the flywheel 11 coupled to a crankshaft of the internal combustion engine. The flywheel 11 is coupled to the crankshaft by means of a flywheel flange 16 configured on the crankshaft. The flywheel 11 can be fastened onto the flywheel flange 16 by means of fasteners such as nut and bolt assembly. Other fastening means are well within the ambit of the present invention.
[0018] In accordance with an embodiment of the present invention, the first system 50 further comprises a first hole 15 configured on the flywheel 11 at a first location.

[0019] The first system 50 further comprises a flywheel housing 14 to house the flywheel 11. The flywheel housing 14 has a second hole 12 configured on the flywheel housing 14 at a second location. The first system 50 further comprises a pin 13 fitted into one of the first hole 15 and the second hole 12. In the present embodiment, the pin 13 is fitted into the second hole 12.
[0020] In accordance with the present invention, the first hole 15 and the second hole 12 are configured to align with each other when the piston of the internal combustion engine is at a top dead center of the engine cylinder of the internal combustion engine, thereby locking the motion of the flywheel 11 via the pin 13 being engaged in the first and the second holes 15, 12 and causing the piston to remain at the top dead center.
[0021] More specifically, the pin 13 protrudes from the surface of the flywheel housing 14 and is in constant surface contact with the surface of the flywheel 11. During rotation of the flywheel 11, as soon the first hole 15 aligns with the second hole 12, the pin 13 is inserted into the first hole 15, thereby locking the motion of the flywheel 11 any further. In an embodiment, the first system 50 further comprises a viewing window 17 configured on the flywheel housing 14 at an operative top end thereof for facilitating viewing the angular position of the flywheel 11 with respect to the Hole 12.
[0022] This locking effect restricts the movement of the flywheel 11 any further and causes the piston to remain at the top dead center of the engine cylinder. While the piston is at the top dead center, a second system 60, in accordance with the embodiment of the present invention, restricts the movement of a camshaft of the engine to hold

the intake manifold of the engine in an opened state, thereby facilitating the efficient fuel injection within the engine cylinder.
[0023] Fig. 2 illustrates a schematic view of the second system 60 of the apparatus 100 for synchronizing operation of the flywheel 11 and a fuel injection unit of an internal combustion engine, in accordance with an embodiment of the present invention. The second system 60 includes a fuel injection pump housed in a fuel injection housing. A third hole configured on the fuel injection housing at a third location.
[0024] The second system 60 further comprises a sleeve 5 configured to fit into the third hole. The sleeve 5 includes a pin 2 disposed within and resiliently held by the sleeve 5. The second system 60 further comprises a cap 7 fitted to an end of the sleeve 5 that is received within the third hole. In one embodiment, the sleeve 5 has thread formations configured on an outer periphery thereof for facilitating secure fitment of the sleeve 5 within the third hole. The second system 60 further comprises further comprises a helical spring
3 and a circlip 6 disposed within the cap 7 and operatively between
the cap 7 and sleeve 5. The helical spring 3 and the circlip 6 facilitate
the resilient fitment of the pin 2 within the sleeve 5.
[0025] The second system 60 further comprises a first attachment 1 fitted on a camshaft of the internal combustion engine. A fourth hole
4 is configured on the first attachment 1. The pin 2 is configured to
engage with the fourth hole 4 on the first attachment 1 to lock the
movement of the camshaft while the piston of the internal combustion
engine is at the top dead center to keep an intake manifold of the
engine in an open state for allowing efficient fuel injection. In an
embodiment, the first attachment 1 is a circular disc.

[0026] In accordance with the present invention, the first system 50 and the second system 60 operate in conjunction, when the piston of the internal combustion engine is at the top dead center. More specifically, the second system 60 restricts the movement of the camshaft of the engine to keep the intake manifold open only when the piston of the engine is held at the top dead center of the engine cylinder by the first system 50. This synergistic operation of the first system 50 and the second system 60 allows the apparatus 100 to optimize the fuel injection timing of the engine by the fuel injection unit of the engine, which includes the fuel injection pump on the housing of which is the second system 60 configured.
[0027] It is to be noted that the apparatus 100 is usable on engines having a mechanical fuel injection systems.
[0028] Although embodiments for an apparatus for synchronizing operation of a flywheel and a fuel injection unit of an internal combustion engine have been described in language specific to structural features and/or methods, it is to be understood that the invention is not necessarily limited to the specific features or methods described. Rather, the specific features and methods are disclosed as exemplary embodiments of the system and the method described herein.

WE CLAIM:
1. An apparatus (100) for synchronizing operation of a flywheel (11) and a fuel injection unit of an internal combustion engine, the apparatus comprising:
- a first system (50) comprising:
o the flywheel (11) coupled to a crankshaft of the internal combustion engine;
o a first hole (15) configured on the flywheel (11) at a first location;
o a flywheel housing (14) to house the flywheel (11);
o a second hole (12) configured on the flywheel housing (14) at a second location;
o a pin (13) fitted into one of the first hole (15) and the second hole (12);
o wherein the first hole (15) and the second hole (12) are configured to align with each other when a piston of the internal combustion engine is at a top dead center of an engine cylinder of the internal combustion engine, thereby locking the motion of the flywheel (11) via the pin (13) being engaged in the first and the second holes (15, 12) and causing the piston to remain at the top dead center; and
- a second system (60) comprising:
o a fuel injection pump housed in a fuel injection housing; o a third hole configured on the fuel injection housing at a third
location; o a sleeve (5) configured to fit into the third hole; o a pin (2) disposed within and resiliently held by the sleeve
(5);

o a first attachment (1) fitted on a camshaft of the FIP in the
engine; o a fourth hole (4) configured on the first attachment (1); o wherein the pin (2) is configured to engage with the fourth hole (4) on the first attachment (1) to lock the movement of the camshaft while the piston of the internal combustion engine is at the top dead center to keep the fuel injection delivery time at desired position with respect to piston’s top dead center the engine in an open state for allowing efficient fuel injection; - wherein the first system (50) and the second system (60) operate in conjunction, when the piston of the internal combustion engine is at the top dead center.
2. The apparatus (100) as claimed in claim 1, wherein the flywheel (11) is mounted on a flywheel flange (16) configured on a crankshaft of the internal combustion engine.
3. The apparatus (100) as claimed in claim 1, wherein the sleeve (5) has thread formations configured on an outer periphery thereof.
4. The apparatus (100) as claimed in claim 1, further comprising a cap (7) fitted to an end of the sleeve (5) that is received within the third hole.
5. The apparatus (100) as claimed in claim 4, further comprising a helical spring (3) and a circlip (6) disposed within the cap (7) and operatively between the cap (7) and sleeve (5).

6. The apparatus (100) as claimed in claim 1, further comprising a viewing window (17) configured on the flywheel housing (14) at an operative top end thereof.
7. The apparatus (100) as claimed in claim 1, wherein the first attachment (1) is a circular disc.