Rotary engine

A rotary engine, comprising:

• a housing having at least one inner surface defining a chamber, the chamber being configured to receive fuel, a flow passage in which a lubricating oil is provided, and an inflow passage communicating with the flow passage;
• a rotor eccentrically and rotatably provided in the chamber, the rotor having at least one edge configured to contact the inner surface of the housing such that, when the rotor rotates inside of the chamber, the fuel provided in the chamber is compressed;
• and
• an oil supplier provided in the housing to supply the lubricating oil to the flow pas sage,
• wherein the oil supplier includes:
• a plug configured to move within the inflow passage in a first direction toward the chamber and a second direction away from the chamber by the eccentrical rotation of the rotor;
• and
• an elastic member coupled to the plug, wherein, when the rotor contacts the plug, the elastic member is compressed, and a restoring force of the elastic member is in the first direction, and
• wherein the flow passage is stepped and the plug is stepped such that the plug is seated in a stepped portion of the supply passage to block lubricating oil from entering the chamber, and lubricating oil supplied from the oil supplier flows between the stepped portion of the supply passage and a stepped portion of the plug to lubricate the edge of the rotor.

A rotary engine, comprising:

• a housing having at least one fuel intake, a chamber communicating with the fuel intake, at least one exhaust port communicating with the chamber to exhaust fuel, and a supply passage configured to communicate with the chamber at a position between positions where the fuel intake and exhaust port communicate with the chamber;
• a rotor eccentrically and rotatably provided in the chamber, the rotor having an edge configured to contact the housing and a surface configured to compress fuel when the rotor is rotated;
• and
• an oil supplier provided in the housing to supply lubricating oil to the supply passage,
• wherein the oil supplier includes:
• a plug configured to move in a first direction to be partially inserted into the supply passage and the chamber to block communication of the chamber with the supply passage and a second direction opposite to the first direction to open communication between the chamber and the supply passage by the eccentrical rotation of the rotor, and
• an elastic member configured to be compressed in the second direction when the edge of the rotor contacts the plug and to exert a restoring force in the first direction on the plug strong enough to move the plug in the first direction when the rotor is rotated such that the surface faces the plug, and
• wherein the supply passage is stepped and the plug is stepped such that, when the plug is moved in the first direction via the elastic member, the plug is seated in a stepped portion of the supply passage to block lubricating oil from entering the chamber, and when the plug is moved in the second direction via the rotor, lubricating oil supplied from the oil supplier flows between the stepped portion of the supply passage and a stepped portion of the plug to lubricate the edge of the rotor.