Opposed-piston internal combustion engine

An opposed-piston internal combustion engine comprising:

• a working cylinder (1),
• a first working piston (10) and a second working piston (20), where respective heads (11;21) of both working pistons (10;20) are opposed to each other,
• a first crankshaft (12) and a second crankshaft (22), wherein the first working piston (10) is connected to the first crankshaft (12) through a first working rod (13), and the second working piston (20) is connected to the second crankshaft (22) through a second working rod (23), wherein a phase shift (X) of the first working rod (13) of the first crankshaft (12) from a phase of the second working rod (23) of the second crankshaft (22) is in the range from 15 to 75 degrees,
• an inlet port (25) formed on the working cylinder (1) in the stroke area of the second working piston (20),
• an outlet port (15) formed on the working cylinder (1) in the stroke area of the first working piston (10),
• a spark plug (50) arranged in a central portion of the working chamber,
• a fuel injection nozzle (51) arranged in the central portion of the working cylinder (1),
• a compressor cylinder (2) located adjacent to the working cylinder (1),
• a first compressor piston (30) and a second compressor piston (40), where heads (31;
• 41) of the compressor pistons (30;
• 40) are opposed to each other, wherein the first compressor piston (30) is connected to the first crankshaft (12) through a first compressor rod (33), and the second compressor piston (40) is connected to the second crankshaft (22) through a second compressor rod (43), wherein a phase shift (Y) of second compressor rod (43) of the second crankshaft (22) from a phase of the second working rod (23) of the second crankshaft (22) is in the range from 80 to 150,
• an air-exchange port (34) formed in a central portion of the compressor cylinder (2) and configured such as to provide an air inflow and outflow from the compressor cylinder (2),
• a compressed-air overflow channel (52) providing a fluid connection between the compressor cylinder (2) and the working cylinder (1) such that air compressed in the compressor cylinder (2) can be moved to the working cylinder (1) through the inlet port (25) thereof, and
• a crankshaft transmission (3) coupling the first crankshaft (12) with the second crankshaft (22), characterised in that the head (11;
• 21) of each working piston (10;
• 20) in its cross-section is in the form of a truncated cone, and wherein on the head (11;
• 21) of each working piston (10;
• 20) recesses (14;
• 24) radially extending from a central portion of the head (11;
• 21) to sides of the head (11;
• 21) are formed.