A method and a Rotary Combustion Engine (RCE) suitable for deactivation of at least one rotor out of a plurality of rotors. The RCE includes at least a first shaft portion and a second shaft portion which are disposed in straight coextensive longitudinal axial alignment. Each shaft portion may support at least one rotor. The at least first shaft portion and second shaft portion are separated by a gap. A shaft coupling mechanism is operable to bridge the gap and couple the first shaft portion in engagement with the second shaft portion for rotation together. The shaft coupling mechanism is also operable to disengage the first shaft portion and the second shaft portion, and thereby deactivate the rotation of at least one rotor.

Provided is a thermal energy recovery device in which poor lubrication of a bearing can be inhibited when an expander is driven. The thermal energy recovery device includes an evaporator (10), an expander (20), a power recovery machine (30), a condenser (40), a pump (50), a circulation flow path (60), a cooling flow path (70) for supplying working fluid from the pump (50) partially to the power recovery machine (30), an on-off valve (V1) provided in the cooling flow path (70), and a control unit (80), in which the expander (20) has a rotor (21), a bearing (22), and a primary casing (23), and in which the power recovery machine (30) has a power recovery unit (31) and a secondary casing (35), and in which upon reception of a stop signal for stopping power recovery by the power recovery machine (30), the control unit (80) closes the on-off valve (V1).

Provided is a thermal energy recovery device in which poor lubrication of a bearing can be inhibited when an expander is driven. The thermal energy recovery device includes an evaporator (10), an expander (20), a power recovery machine (30), a condenser (40), a pump (50), a circulation flow path (60), a cooling flow path (70) for supplying working fluid from the pump (50) partially to the power recovery machine (30), an on-off valve (V1) provided in the cooling flow path (70), and a control unit (80), in which the expander (20) has a rotor (21), a bearing (22), and a primary casing (23), and in which the power recovery machine (30) has a power recovery unit (31) and a secondary casing (35), and in which upon reception of a stop signal for stopping power recovery by the power recovery machine (30), the control unit (80) closes the on-off valve (V1).

This invention refers to the engine-building area; in particular, to internal combustion engines with rotating parts, more specifically to a rotary-vane internal combustion engine (ICE), which can be used on water, air and land transport vehicles.

The rotary-vane ICE featuring the inlet and outlet ports and ignition plug holes with air-fuel intake and compression chambers alternating with the combustion product expansion and removal chambers, the cylindrical rotor attached to the shaft with longitudinal grooves with blades and combustion chambers arranged on the cylindrical surface of the rotor, the side walls, the front and rear end shields, in this case the side walls are arranged in the form of cylindrical borings with the axes being parallel to the stator axis and spaced evenly all over its internal surface, each blade consists of separate plates with possible mutual displacement, in this case each blade plate is made of two parts being pulled apart by a spring in axial direction and the number of blades is equal to the number of air-fuel mixture intake chambers The result to be achieved in this invention consists in simplifying the ICE design with rotary parts and in increasing its reliability and adaptability to streamlined manufacture, preventing the unburned fractions of air-fuel mixture from being emitted into atmosphere as well as ensuring that the engine can be switched over to economic run.

This invention refers to the engine-building area; in particular, to internal combustion engines with rotating parts, more specifically to a rotary-vane internal combustion engine (ICE), which can be used on water, air and land transport vehicles.

The rotary-vane ICE featuring the inlet and outlet ports and ignition plug holes with air-fuel intake and compression chambers alternating with the combustion product expansion and removal chambers, the cylindrical rotor attached to the shaft with longitudinal grooves with blades and combustion chambers arranged on the cylindrical surface of the rotor, the side walls, the front and rear end shields, in this case the side walls are arranged in the form of cylindrical borings with the axes being parallel to the stator axis and spaced evenly all over its internal surface, each blade consists of separate plates with possible mutual displacement, in this case each blade plate is made of two parts being pulled apart by a spring in axial direction and the number of blades is equal to the number of air-fuel mixture intake chambers The result to be achieved in this invention consists in simplifying the ICE design with rotary parts and in increasing its reliability and adaptability to streamlined manufacture, preventing the unburned fractions of air-fuel mixture from being emitted into atmosphere as well as ensuring that the engine can be switched over to economic run.

A rotary engine having an insert in a peripheral wall of the stator body, the insert being made of a material having a greater heat resistance than that of the peripheral wall, having a subchamber defined therein and having an inner surface, the subchamber communicating with the cavity through at least one opening defined in the inner surface and having a shape forming a reduced cross-section adjacent the opening, a pilot fuel injector having a tip received in the subchamber, an ignition element having a tip received in the subchamber, and a main fuel injector extending through the stator body and having a tip communicating with the cavity at a location spaced apart from the insert. The subchamber has a volume corresponding to from 5% to 25% of a sum of the minimum volume and the volume of the subchamber. A method of injecting heavy fuel into a Wankel engine is also discussed.

A stop control system includes a direct-injection type internal combustion engine, a fuel injection valve, an accessory configured to be driven by the internal combustion engine, and a controller configured to operate the internal combustion engine. The controller is configured to control the accessory during a period from start of fuel cut to a moment immediately after the internal combustion engine stops, such that when the internal combustion engine stops completely, the output shaft comes, in a rotational direction, to a target stop position where an intake port is closed.

A stop control system includes a direct-injection type internal combustion engine, a fuel injection valve, an accessory configured to be driven by the internal combustion engine, and a controller configured to operate the internal combustion engine. The controller is configured to control the accessory during a period from start of fuel cut to a moment immediately after the internal combustion engine stops, such that when the internal combustion engine stops completely, the output shaft comes, in a rotational direction, to a target stop position where an intake port is closed.

A method of controlling an air intake flow in a rotary engine having primary and secondary inlet ports, including positioning the secondary inlet port rearwardly of the primary inlet port and forwardly of the exhaust port along a direction of a revolution of the rotor, providing independently closable communications between an air source and the primary and secondary inlet ports, and controlling air intake flows between the air source and the primary and secondary inlet ports. Controlling air intake flows includes simultaneously allowing the air intake flow between the primary inlet port and the air source and between the secondary inlet port and the air source. Exhaust gases of the engine are purged with the air intake flow of the secondary inlet port. A rotary engine is also discussed.

A method of controlling an air intake flow in a rotary engine having primary and secondary inlet ports, including positioning the secondary inlet port rearwardly of the primary inlet port and forwardly of the exhaust port along a direction of a revolution of the rotor, providing independently closable communications between an air source and the primary and secondary inlet ports, and controlling air intake flows between the air source and the primary and secondary inlet ports. Controlling air intake flows includes simultaneously allowing the air intake flow between the primary inlet port and the air source and between the secondary inlet port and the air source. Exhaust gases of the engine are purged with the air intake flow of the secondary inlet port. A rotary engine is also discussed.