A method of controlling a rotary engine is disclosed. The rotary engine includes a shroud surrounding a rotor. The rotor carries a combustion chamber spaced from an axis of rotation of the rotor. A pressure activated valve is located between the combustion chamber and obliquely arranged exhaust nozzles. An ECU controls the combustion cycle of the engine based on a signal from a pressure sensor in the combustion chamber. The electronic control responds to the pressure signal from the pressure sensor to open a fuel control valve, to fire a spark plug and cause combustion of the fuel within the combustion chamber, and to thereafter open an air control valve to purge the combustion chamber of exhaust gasses.

A method of controlling a rotary engine is disclosed. The rotary engine includes a shroud surrounding a rotor. The rotor carries a combustion chamber spaced from an axis of rotation of the rotor. A pressure activated valve is located between the combustion chamber and obliquely arranged exhaust nozzles. An ECU controls the combustion cycle of the engine based on a signal from a pressure sensor in the combustion chamber. The electronic control responds to the pressure signal from the pressure sensor to open a fuel control valve, to fire a spark plug and cause combustion of the fuel within the combustion chamber, and to thereafter open an air control valve to purge the combustion chamber of exhaust gasses.

An internal combustion engine has a plurality of engine units, each having a working space, in which two rotary pistons are arranged so as mesh with each other and thereby divide the working space into an inflow region and an outflow region. Each engine unit has a closable inlet opening to the inflow region and a closable exhaust gas outlet opening. The internal combustion engine further includes a feed-line pipe to the inlet openings and an exhaust gas collection pipe connected to the exhaust gas outlet openings, so that the engine units are connected in parallel with each other. The internal combustion engine further includes exhaust gas lines which connect the engine units with each other in series. In certain cases, a control device operates some of the engine units either as internal combustion engines, or as expansion engines.

An internal combustion engine has a plurality of engine units, each having a working space, in which two rotary pistons are arranged so as mesh with each other and thereby divide the working space into an inflow region and an outflow region. Each engine unit has a closable inlet opening to the inflow region and a closable exhaust gas outlet opening. The internal combustion engine further includes a feed-line pipe to the inlet openings and an exhaust gas collection pipe connected to the exhaust gas outlet openings, so that the engine units are connected in parallel with each other. The internal combustion engine further includes exhaust gas lines which connect the engine units with each other in series. In certain cases, a control device operates some of the engine units either as internal combustion engines, or as expansion engines.

A cylinder is installed within a case, and an output shaft and an arm that is integrated thereto and extends in a radial direction are installed within the cylinder. A piston extending in an arc slides and is displaced in a circumferential direction of the cylinder within the cylinder. One end portion of the piston is rotatably connected to the arm. The cylinder is internally provided with a first pressure chamber in which the arm is housed and a second pressure chamber in which the other end portion of the arm is slidably installed. A pressure medium is fed into one of the first and second pressure chambers and discharged from the other, and the output shaft pivots in a rotational direction.

A cylinder is installed within a case, and an output shaft and an arm that is integrated thereto and extends in a radial direction are installed within the cylinder. A piston extending in an arc slides and is displaced in a circumferential direction of the cylinder within the cylinder. One end portion of the piston is rotatably connected to the arm. The cylinder is internally provided with a first pressure chamber in which the arm is housed and a second pressure chamber in which the other end portion of the arm is slidably installed. A pressure medium is fed into one of the first and second pressure chambers and discharged from the other, and the output shaft pivots in a rotational direction.

A pneumatic engine includes a plurality of pneumatic motors and an engine drive shaft. Each motor has a motor gas inlet, a motor gas outlet, and a rotor driven by gas flow between the motor gas inlet and the motor gas outlet. The engine drive shaft is drivingly coupled to the motor drive shaft of each of the pneumatic motors.

A rotary engine includes a shroud surrounding a rotor. The rotor carries at least one combustion chamber spaced from an axis of rotation of the rotor. A pressure activated valve, such as a relief valve, is located between the combustion chamber and obliquely arranged exhaust nozzles. A drive shaft is engaged to the rotor for mutual rotation. An ECU controls the combustion cycle of the engine based on a signal from a pressure sensor in the combustion chamber. A fuel control valve delivers fuel into the combustion chamber. An air control valve delivers pressurized air into the combustion chamber. The electronic control responds to the pressure signal from the pressure sensor to open the fuel control valve, to fire a spark plug and cause combustion of the fuel within the combustion chamber, and to thereafter open the air control valve to purge the combustion chamber of exhaust gasses. A method of operating the controls is also disclosed.

A CAES generator includes a plurality of motors, a plurality of compressors, a pressure accumulator, an expander, a generator, an electric-motor inverter that changes a rotation speed of each of the motors, a feed command receiver that receives input power as a feed command value before feeding the input power, and a controller. The controller includes a compressor number calculation unit that calculates a maximum number of motors that are allowed to be driven at a rating based on the feed command value, and a compressor drive control unit that drives at the rating, the motors, the number of which is the maximum number calculated by the compressor number calculation unit.

A CAES generator includes a plurality of motors, a plurality of compressors, a pressure accumulator, an expander, a generator, an electric-motor inverter that changes a rotation speed of each of the motors, a feed command receiver that receives input power as a feed command value before feeding the input power, and a controller. The controller includes a compressor number calculation unit that calculates a maximum number of motors that are allowed to be driven at a rating based on the feed command value, and a compressor drive control unit that drives at the rating, the motors, the number of which is the maximum number calculated by the compressor number calculation unit.