Rotary piston type internal combustion engine

A rotary piston type internal combustion engine comprising an output shaft, a rotor coupled to said output shaft with no relative rotation, a housing rotatably supporting said output shaft, an annular operation chamber formed by said rotor and housing for forming an intake operation chamber, a compression operation chamber, a combustion operation chamber and an exhaust operation chamber, at least one pressuring/pressured member provided to said rotor for partitioning said annular operation chamber and for compressing intake air in the compression operation chamber and receiving gas pressure of combustion gas in the combustion operation chamber, at least one operation chamber partitioning member provided to said housing for partitioning said annular operation chamber, an intake port for introducing intake air into said annular operation chamber, an exhaust port for exhausting gas from said annular operation chamber, and a fuel supply means for supplying fuel, wherein compressed fuel-air mixture is ignited using a spark plug or compression ignition;

• said annular operation chamber is formed by at least one of sidewall portions of said rotor in an axial direction of said output shaft and said housing, and has an entirely or mostly cylindrical inner peripheral wall and an entirely or mostly cylindrical outer peripheral wall;
• said operation chamber partitioning member comprising a reciprocating partitioning member that reciprocates in parallel to an axis of said output shaft between an advanced position where it partitions said annular operation chamber and a retracted position where it is retracted from said annular operation chamber;
• a biasing means for biasing said reciprocating partitioning member toward said advanced position;
• said pressuring/pressured member comprising an arc-shaped partitioning member having a first inclined surface for driving said reciprocating partitioning member from said advanced position to said retracted position, a forefront sliding surface continued from said first inclined surface, and a second inclined surface continued from said forefront sliding surface and allowing said reciprocating partitioning member to return from said retracted position to said advanced position;
• wherein said annular operation chamber has a wall parallel to a plane orthogonal to the axis of said output shaft;
• said wall being formed on said sidewall portion of said rotor;
• and
• wherein said reciprocating partitioning member has on a forefront end portion a first sliding surface for making hermetic contact with said first inclined surface of said arc-shaped partitioning member, a forefront sliding surface continued from said first sliding surface and for making hermetic contact with said wall parallel to a plane orthogonal to the axis of said output shaft, and a second sliding surface continued from said front sliding surface and for making hermetic contact with said second inclined surface of said arc-shaped partitioning member.

A rotary piston type internal combustion engine comprising an output shaft, a rotor coupled to said output shaft with no relative rotation, a housing rotatably supporting said output shaft, an annular operation chamber formed by said rotor and housing for forming an intake operation chamber, a compression operation chamber, a combustion operation chamber and an exhaust operation chamber, at least one pressuring/pressured member provided to said rotor for partitioning said annular operation chamber and for compressing intake air in the compression operation chamber and receiving gas pressure of combustion gas in the combustion operation chamber, at least one operation chamber partitioning member provided to said housing for partitioning said annular operation chamber, an intake port for introducing intake air into said annular operation chamber, an exhaust port for exhausting gas from said annular operation chamber, and a fuel supply means for supplying fuel, wherein compressed fuel-air mixture is ignited using a spark plug or compression ignition;

• said annular operation chamber is formed by at least one of sidewall portions of said rotor in an axial direction of said output shaft and said housing, and has an entirely or mostly cylindrical inner peripheral wall and an entirely or mostly cylindrical outer peripheral wall;
• said operation chamber partitioning member comprising a reciprocating partitioning member that reciprocates in parallel to an axis of said output shaft between an advanced position where it partitions said annular operation chamber and a retracted position where it is retracted from said annular operation chamber;
• a biasing means for biasing said reciprocating partitioning member toward said advanced position;
• said pressuring/pressured member comprising an arc-shaped partitioning member having a first inclined surface for driving said reciprocating partitioning member from said advanced position to said retracted position, a forefront sliding surface continued from said first inclined surface, and a second inclined surface continued from said forefront sliding surface and allowing said reciprocating partitioning member to return from said retracted position to said advanced position;
• wherein said pressuring/pressured member provided to said rotor comprises said arc-shaped partitioning member and said housing is provided with said operation chamber partitioning member a first reciprocating partitioning member and a second reciprocating partitioning member spaced from said first reciprocating partitioning member by at least 180 degrees in a rotor rotation direction;
• wherein said intake port is formed in a portion of said housing near said second reciprocating partitioning member at a leading side in the rotor rotation direction that said second reciprocating partitioning member, and said exhaust port is formed in a portion of said housing near said second reciprocating partitioning member at a trailing side in the rotor rotation direction than said second reciprocating partitioning member;
• wherein when said pressuring/pressured member is between said intake port and said first reciprocating partitioning member, said intake operation chamber is formed between said second reciprocating partitioning member and said pressuring/pressured member and said compression operation chamber is formed between said pressuring/pressured member and said first reciprocating partitioning member in said annular operation chamber;
• wherein when said pressuring/pressured member is between said first reciprocating partitioning member and said exhaust port, said combustion operation chamber is formed between said first reciprocating partitioning member and said pressuring/pressured member and said exhaust operation chamber is formed between said pressuring/pressured member and said second reciprocating partitioning member in said annular operation chamber;
• and
• wherein said fuel supply means has a fuel injector for injecting fuel into said compression operation chamber and a spark plug is provided for igniting fuel-air mixture in an auxiliary combustion chamber positioned in a wall portion of said housing on an output shaft side than said first reciprocating partitioning member.

A rotary piston type internal combustion engine comprising an output shaft, a rotor coupled to said output shaft with no relative rotation, a housing rotatably supporting said output shaft, an annular operation chamber formed by said rotor and housing for forming an intake operation chamber, a compression operation chamber, a combustion operation chamber and an exhaust operation chamber, at least one pressuring/pressured member provided to said rotor for partitioning said annular operation chamber and for compressing intake air in the compression operation chamber and receiving gas pressure of combustion gas in the combustion operation chamber, at least one operation chamber partitioning member provided to said housing for partitioning said annular operation chamber, an intake port for introducing intake air into said annular operation chamber, an exhaust port for exhausting gas from said annular operation chamber, and a fuel supply means for supplying fuel, wherein compressed fuel-air mixture is ignited using a spark plug or compression ignition;

• said annular operation chamber is formed by at least one of sidewall portions of said rotor in an axial direction of said output shaft and said housing, and has an entirely or mostly cylindrical inner peripheral wall and an entirely or mostly cylindrical outer peripheral wall;
• said operation chamber partitioning member comprising a reciprocating partitioning member that reciprocates in parallel to an axis of said output shaft between an advanced position where it partitions said annular operation chamber and a retracted position where it is retracted from said annular operation chamber;
• a biasing means for biasing said reciprocating partitioning member toward said advanced position;
• said pressuring/pressured member comprising an arc-shaped partitioning member having a first inclined surface for driving said reciprocating partitioning member from said advanced position to said retracted position, a forefront sliding surface continued from said first inclined surface, and a second inclined surface continued from said forefront sliding surface and allowing said reciprocating partitioning member to return from said retracted position to said advanced position;
• wherein said pressuring/pressured member provided to said rotor comprises said arc-shaped partitioning member and said housing is provided with said operation chamber partitioning member a first reciprocating partitioning member and a second reciprocating partitioning member spaced from said first reciprocating partitioning member by at least 180 degrees in a rotor rotation direction;
• wherein said intake port is formed in a portion of said housing near said second reciprocating partitioning member at a leading side in the rotor rotation direction than said second reciprocating partitioning member, and said exhaust port is formed in a portion of said housing near said second reciprocating partitioning member at a trailing side in the rotor rotation direction than said second reciprocating partitioning member;
• wherein when said pressuring/pressured member is between said intake port and said first reciprocating partitioning member, said intake operation chamber is formed between said second reciprocating partitioning member and said pressuring/pressured member and said compression operation chamber is formed between said pressuring/pressured member and said first reciprocating partitioning member in said annular operation chamber;
• wherein when said pressuring/pressured member is between said first reciprocating partitioning member and said exhaust port, said combustion operation chamber is formed between said first reciprocating partitioning member and said pressuring/pressured member and said exhaust operation chamber is formed between said pressuring/pressured member and said second reciprocating partitioning member in said annular operation chamber;
• and
• wherein said fuel supply means has a fuel injector for injecting fuel into an auxiliary combustion chamber provided in a wall portion of said housing on an output shaft side than said first reciprocating partitioning member.

A rotary piston type internal combustion engine comprising an output shaft, a rotor coupled to said output shaft with no relative rotation, a housing rotatably supporting said output shaft, an annular operation chamber formed by said rotor and housing for forming an intake operation chamber, a compression operation chamber, a combustion operation chamber and an exhaust operation chamber, at least one pressuring/pressured member provided to said rotor for partitioning said annular operation chamber and for compressing intake air in the compression operation chamber and receiving gas pressure of combustion gas in the combustion operation chamber, at least one operation chamber partitioning member provided to said housing for partitioning said annular operation chamber, an intake port for introducing intake air into said annular operation chamber, an exhaust port for exhausting gas from said annular operation chamber, and a fuel supply means for supplying fuel, wherein compressed fuel-air mixture is ignited using a spark plug or compression ignition;

• said annular operation chamber is formed by at least one of sidewall portions of said rotor in an axial direction of said output shaft and said housing, and has an entirely or mostly cylindrical inner peripheral wall and an entirely or mostly cylindrical outer peripheral wall;
• said operation chamber partitioning member comprising a reciprocating partitioning member that reciprocates in parallel to an axis of said output shaft between an advanced position where it partitions said annular operation chamber and a retracted position where it is retracted from said annular operation chamber;
• a biasing means for biasing said reciprocating partitioning member toward said advanced position;
• said pressuring/pressured member comprising an arc-shaped partitioning member having a first inclined surface for driving said reciprocating partitioning member from said advanced position to said retracted position, a forefront sliding surface continued from said first inclined surface, and a second inclined surface continued from said forefront sliding surface and allowing said reciprocating partitioning member to return from said retracted position to said advanced position;
• wherein said pressuring/pressured member provided to said rotor comprises said arc-shaped partitioning member and said housing is provided with said operation chamber partitioning member a first reciprocating partitioning member and a second reciprocating partitioning member spaced from said first reciprocating partitioning member by at least 180 degrees in a rotor rotation direction;
• wherein said intake port is formed in a portion of said housing near said second reciprocating partitioning member at a leading side in the rotor rotation direction than said second reciprocating partitioning member, and said exhaust port is formed in a portion of said housing near said second reciprocating partitioning member at a trailing side in the rotor rotation direction than said second reciprocating partitioning member;
• wherein when said pressuring/pressured member is between said intake port and said first reciprocating partitioning member, said intake operation chamber is formed between said second reciprocating partitioning member and said pressuring/pressured member and said compression operation chamber is formed between said pressuring/pressured member and said first reciprocating partitioning member in said annular operation chamber;
• wherein when said pressuring/pressured member is between said first reciprocating partitioning member and said exhaust port, said combustion operation chamber is formed between said first reciprocating partitioning member and said pressuring/pressured member and said exhaust operation chamber is formed between said pressuring/pressured member and said second reciprocating partitioning member in said annular operation chamber;
• and
• wherein said fuel supply means has a fuel injector for injecting fuel into an auxiliary combustion chamber provided in a wall portion of said housing on an output shaft side than said first reciprocating partitioning member and fuel-air mixture in said auxiliary combustion chamber is ignited using compression ignition.