Air charging system for an opposed piston opposed cylinder free piston engine

A free piston engine comprising:

• an energy generation and control assembly having a first side and a second side in opposed relation to the first side;
• a first combustion cylinder assembly located adjacent to the first side of the energy generation and control assembly and including a first cylinder liner that defines a first engine cylinder, which is centered about an axis of motion, and with the first cylinder liner including a plurality of circumferentially spaced exhaust ports and a plurality of circumferentially spaced intake ports;
• a second combustion cylinder assembly located adjacent to the second side of the energy generation and control assembly and including a second cylinder liner that defines a second engine cylinder, which is centered about the axis of motion, and with the second cylinder liner including a plurality of circumferentially spaced exhaust ports and a plurality of circumferentially spaced intake ports;
• an inner piston assembly having a first inner piston with a first inner piston head and a second inner piston with a second inner piston head, with the first inner piston mounted in the first engine cylinder such that the first inner piston head faces away from the first side and is telescopically slidable within the first engine cylinder along the axis of motion, and with the second inner piston mounted in the second engine cylinder such that the second inner piston head faces away from the second side and is telescopically slidable within the second engine cylinder along the axis of motion, and with the inner piston assembly further including a push rod having a first end affixed to the first inner piston and a second end affixed to the second inner piston and a middle portion extending through the energy generation and control assembly;
• an outer piston assembly having a first outer piston with a first outer piston head and a second outer piston with a second outer piston head, and with the first outer piston mounted in the first engine cylinder such that the first outer piston head faces toward the first inner piston head and is telescopically slidable within the first engine cylinder, and with the second outer piston mounted in the second engine cylinder such that the second outer piston head faces toward the second inner piston head and is telescopically slidable within the second engine cylinder, and with the outer piston assembly further including a first pull rod having a first end affixed to the first outer piston and a second end affixed to the second outer piston and a middle portion extending through the energy generation and control assembly;
• and
• a turbocharger having a turbine including an inlet in fluid communication with the exhaust ports of the first combustion cylinder and the exhaust ports of the second combustion cylinder, and a compressor that is rotationally driven by the turbine and including an outlet that is in fluid communication with the intake ports of the first combustion cylinder and the exhaust ports of the second combustion cylinder.

A free piston engine assembly comprising:

• a first free piston engine including an energy generation and control assembly having a first side and a second side in opposed relation to the first side;
• a first combustion cylinder assembly located adjacent to the first side of the energy generation and control assembly and including a first cylinder liner that defines a first engine cylinder, and with the first cylinder liner including an exhaust port and an intake port;
• a second combustion cylinder assembly located adjacent to the second side of the energy generation and control assembly and including a second cylinder liner that defines a second engine cylinder, and with the second cylinder liner including an exhaust port and an intake port;
• and a first piston assembly having a first piston located and telescopically slidable within the first engine cylinder, a second piston located and telescopically slidable within the second engine cylinder, and a driven rod affixed between the first and second pistons and having a middle portion extending through and engaging the energy generation and control assembly;
• a second free piston engine including a second energy generation and control assembly having a first side and a second side in opposed relation to the first side;
• a third combustion cylinder assembly located adjacent to the first side of the second energy generation and control assembly and including a third cylinder liner that defines a third engine cylinder, and with the third cylinder liner including an exhaust port and an intake port, a fourth combustion cylinder assembly located adjacent to the second side of the second energy generation and control assembly and including a fourth cylinder liner including an exhaust port and an intake port, and a second piston assembly having a third piston located and telescopically slidable within the third engine cylinder, and a fourth piston located and telescopically slidable within the fourth engine cylinder, and a second driven rod affixed between the third and fourth pistons and having a middle portion extending through and engaging the second energy generation and control assembly;
• and
• a turbocharger having a turbine including an inlet adapted to be in fluid communication with exhaust from the exhaust ports of the first, second, third and fourth combustion cylinders, and having a compressor that is rotationally driven by the turbine and includes an outlet that is in adapted to be in fluid communication with the intake ports of the first, second, third and fourth combustion cylinders.