Six-cylinder opposed free piston internal combustion engine generator

A six-cylinder opposed free piston internal combustion engine generator, comprising:

• two free piston internal combustion engine sets, one opposed piston internal combustion engine set and two linear generator sets, wherein two sides of the opposed piston internal combustion engine set are respectively connected to the two linear generator sets, each opposed piston internal combustion engine set is connected to one free piston internal combustion engine set,
• each linear generator set comprises a stator coil (1), a motor shell (2), a generator rotor (3), a rotor mandrel (4) and a spring (5), the stator coil (1) is fixed inside the motor shell (2), the generator rotor (3) is fixed on the rotor mandrel (4), along with movement of the rotor mandrel (4) driven by the free piston internal combustion engine sets and the opposed piston internal combustion engine set on the two sides, the generator rotor (3) passes through a magnetic induction line generated by the stator coil (1) for power generation;
• the spring (5) is arranged between the generator rotor (3) and the motor shell (2) to limit the movement of the rotor mandrel (4);
• two free piston internal combustion engine set and one opposed piston internal combustion engine set each comprise a low-pressure cylinder set, a high-pressure cylinder set, an intercooler (12) and an exhaust gas communicating pipe (18);
• and the intercooler (12) and the exhaust gas communicating pipe (18) are connected between the low-pressure cylinder set and the high-pressure cylinder set, air entering cylinders is first subjected to first-stage compression in the low-pressure cylinder set in the free piston internal combustion engine set and the opposed piston internal combustion engine set and then subjected to second-stage compression in the high-pressure cylinder set, and a high pressure gas produced after the combustion is subjected to first-stage expansion in the high-pressure cylinder set and then subjected to second-stage expansion in the low-pressure cylinder set.