An internal combustion engine, comprising:
- an expander comprising:
- a rotor housing having a rotor chamber disposed therein;
- and
- a pair of rotors disposed within the rotor chamber, each rotor comprising:
- a cylindrical, center main body comprising:
- a first end;
- a second end opposite the first end;
- an elongate portion extending between the first end and the second end and having a first peripheral surface portion and a second peripheral surface portion;
- and
- a bore extending through a center of the main body from the first end to the second end;
- a pair of opposed, curved, outer peripheral edge portions, the pair of opposed, curved outer peripheral edge portions being alternatingly disposed between the first peripheral surface portion and the second peripheral surface portion, the pair of opposed, curved, outer peripheral edge portions forming an outer peripheral surface, each of the pair of opposed, curved, outer peripheral edge portions having a groove extending along the opposed, curved, outer peripheral edge portions;
- a pair of tip seals, each of the pair of tip seals being disposed in one of the grooves;
- and
- a pair of apex seals disposed on the first peripheral surface portion and the second peripheral surface portion;
- and
- an axially floating end plate disposed at an end of the housing;
- a compressor comprising:
- a rotor housing having a rotor chamber disposed therein;
- and
- a pair of rotors disposed within the rotor chamber, each rotor comprising:
- a cylindrical, center main body comprising:
- a first end;
- a second end opposite the first end;
- an elongate portion extending between the first end and the second end and having a first peripheral surface portion and a second peripheral surface portion;
- and
- a bore extending through a center of the main body from the first end to the second end;
- a pair of opposed, curved, outer peripheral edge portions, the pair of opposed, curved outer peripheral edge portions being alternatingly disposed between the first peripheral surface portion and the second peripheral surface portion, the pair of opposed, curved, outer peripheral edge portions forming an outer peripheral surface, each of the pair of opposed, curved, outer peripheral edge portions having a groove extending along the opposed, curved, outer peripheral edge portions;
- a pair of tip seals, each of the pair of tip seals being disposed in one of the grooves;
- and
- a pair of apex seals disposed on the first peripheral surface portion and the second peripheral surface portion;
- and
- an axially floating end plate disposed within the rotor housing;
- and
- a rotary valve fluidly connecting the expander to the compressor.