WE CLAIM:
1. An electromagnetic reciprocating engine (100), the engine (100) comprising:
a casing (122) defined with a bore (101);
a first permanent magnet (102) and a second permanent magnet (103) movably coupled in the casing (122) at two opposite ends (104a, 104b) of the bore (101), wherein at least one of the first permanent magnet (102) and the second permanent magnet (103) is movable relative to the ends (104a, 104b) of the bore (101) to vary a stroke length;
an electromagnet (105) movably positioned within the bore (101) between the first permanent magnet (102) and the second permanent magnet (103), the electromagnet (105) is configured to reciprocate with the bore (101);
a crankshaft (110) defined with a provision (111) at a substantially central portion; and
at least one connecting rod (109) defined with a first end (109a) coupled to the electromagnet (105) and a second end (109b) extending through the provision (111) for coupling with the crankshaft (110), the second end (109b) is slidable within the provision (111) to change a position of contact with the crankshaft (110), corresponding to change in the stroke length.
2. The engine (100) as claimed in claim 1, wherein the casing (122) is defined with guideways, wherein the guideways are configured to movably support and guide the first permanent magnet (102) and the second permanent magnet (103), during displacement of the first permanent magnet (102) and the second permanent magnet (103).
3. The engine (100) as claimed in claim 1, comprising a second actuator (119) coupled to a second end (109b) of the at least one connecting rod (109), the second actuator (119) is configured to slide the second end (109b) along the provision (111) to change the position of contact with the crankshaft (110).
4. The engine (100) as claimed in claim 3, comprising a first actuator (118) coupled to one of the first permanent magnet (102) and the second permanent magnet (103), the first actuator (118) is configured to displace at least one of the first permanent magnet (102) and the second permanent magnet (103), corresponding to change in the position of contact with the crankshaft (110), to vary the stroke length.

5. The engine (100) as claimed in claim 4, comprising a control unit (120) communicatively
coupled to the first actuator (118) and the second actuator (119), the control unit (120) is
configured to:
receive, a signal from one or more sensors or encoders (121), corresponding to torque and speed requirement;
operate, the second actuator (119) to slide the second end (109b) of the at least one connecting rod (109) within the provision (111) to change the point of contact with the crankshaft (110); and
operate, the first actuator (118) to displace one of the first permanent magnet (102) and the second permanent magnet (103) in relation to the end of the bore (101), corresponding to the change the position of contact with the crankshaft (110), to meet the torque and speed requirement.
6. The engine (100) as claimed in claim 5, wherein the one or more sensors or encoders (121) generate a signal to the control unit (120), corresponding to torque and speed requirement input by an operator
7. The engine (100) as claimed in claim 5, wherein operating the first actuator (118) to displace one or both of the first permanent magnet (102) and the second permanent magnet (103) closer to each other and operating the second actuator (119) to slide the second end (109b) towards a first end (112a) of the provision (111), decreases the stroke length.
8. The engine (100) as claimed in claim 5, wherein operating the first actuator (118) to displace one or both of the first permanent magnet (102) and the second permanent magnet (103) away from each other and operating the second actuator (119) to slide the second end (109b) towards a second end (112b) of the provision (111), increases the stroke length and provides higher torque and lesser speed.
9. The engine (100) as claimed in claim 5, comprising one or more sensors or encoders (121) communicatively coupled to the control unit (120) and the control unit (120) is configured to sense a position of the electromagnet (105) in the bore (101) based on a signal from the one or more sensors (125) and deactivates operation of the first actuator (118) and the second actuator (119) corresponding to signal received from the one or more sensors (125).

10. The engine (100) as claimed in claim 5, comprising a power source (117) electrically coupled to the electromagnet (105) and communicatively coupled to the control unit (120), the power source (117) is configured to energize the electromagnet (105) and the control unit (120) is configured to change a polarity of the electromagnet (105) at a predefined frequency to generate opposite magnetic poles at a first side (115a) and a second side (115b) of the electromagnet (105), and wherein the change in polarity of the electromagnet (105) triggers reciprocating movement of the electromagnet (105) between the first permanent magnet (102) and the second permanent magnet (103).