An alpha type stirling engine

An alpha type Stirling engine, comprising

• a first piston (101, 201), a second piston (102, 202), a third piston (103, 203) and a fourth piston (104, 204),
• a first chamber (1l1, 211), a second chamber (112, 212), a third chamber (113, 213) and a fourth chamber (114, 214), in which the first piston (101, 20l), the second piston (102, 202), the third piston (103, 203) and the fourth piston (104, 204), respectively are housed for reciprocating movement,
• at least two linear motors/generators (121, 122, 221, 222, 223, 224) configured to cause said pistons to move in the respective chambers,
• each one of said pistons defining in its respective chamber a primary chamber side (111a, 112a, 113a, 114a, 211a, 212a, 213a, 214a) located on one side of the piston and a secondary chamber side (111b, 112b, 113b, 114b, 211b, 212b, 213b, 214b) located on the other side of the piston,
• a first primary gas channel (131, 231), which fluidly interconnects the primary chamber side (111a, 211a) of the first chamber (111, 211) with the primary chamber side (112a, 212a) of the second chamber (112, 212),
• a second primary gas channel (132, 232), which fluidly interconnects the primary chamber side (113a, 213a) of the third chamber (113, 213) with the primary chamber side (114a, 214a) of the fourth chamber (114, 214),
• a first secondary gas channel (141, 241), which fluidly interconnects the secondary chamber side (111b, 211b) of the first chamber (111, 211) with the secondary chamber side (114b, 214b) of the fourth chamber (114, 214), and
• a second secondary gas channel (142, 242), which fluidly interconnects the secondary chamber side (112b, 212b) of the second chamber (112, 2112) with the secondary chamber side (113b, 213b) of the third chamber (113, 213).