Abstract:
Die vorliegende Erfindung betrifft ein Verfahren zum Betreiben eines Freikolbenlineargenerators (1) zur Erzeugung elektrischer Energie, wobei der Freikolbenlineargenerator (1) mindestens einen Lineargenerator (10) sowie mindestens eine Verbrennungseinheit (11) mit mindestens einer Brennkammer (110) aufweist und die Verbrennungseinheit (11) und der Lineargenerator (10) über zumindest eine Kolben-Läufer-Einheit (12) miteinander verkoppelt sind, wobei die Kolben-Läufer-Einheit (12) mindestens einen Läufer (121) sowie mindestens einen Kolben (120) umfasst, der einen Expansionshub von einem oberen Totpunkt (OT) zu einem unteren Totpunkt (UT) und einen Kompressionshub vom unteren Totpunkt (UT) zum oberen Totpunkt (OT) ausführt, wobei nach der Beschleunigung des mindestens einen Kolbens (120) die elektrische Energieentnahme durch den Lineargenerator (10) in der Weise geregelt oder gesteuert wird, dass hierdurch ein kontrollierter Sollgeschwindigkeitsverlauf des Kolbens (120) zwischen OT und UT mindestens abschnittsweise erreicht wird, dadurch gekennzeichnet, dass die Energie zur Ausführung des Kompressionshubs dem Lineargenerator (10) entnommen wird, der diese Energie während des Expansionshubs im Lineargenerator (10) als magnetisch gespeicherte Energie bereitstellt.
Abstract:
Multiphase electromagnetic machines, such as free -piston engines or compressors, may require, or supply, a pulsed power profile from or to a DC bus, respectively. The pulsed power profile may include relatively large fluctuations in instantaneous power. Sourcing, sinking, or otherwise exchanging power with an AC grid, via an inverter, may be accomplished by using an energy storage device and a DC-DC converter coupled to a DC bus. The energy storage device may aid in smoothing the pulsed power profile, while the DC-DC converter may aid in reducing fluctuations in voltage across a DC bus due to energy storage in the energy storage device.
Abstract:
La présente invention porte sur un moteur thermique pour l'entraînement d'un arbre moteur, comprenant au moins un générateur de gaz et une turbine (6), le générateur de gaz alimentant la turbine en gaz moteur et la turbine entraînant en rotation l'arbre moteur. Le moteur est caractérisé par le fait que le générateur de gaz est un moteur à combustion interne à quatre temps (14), qu'il comprend un compresseur (21) d'alimentation en air du moteur à combustion interne, le compresseur étant entraîné mécaniquement par le moteur à combustion interne, et que la turbine (6) est libre mécaniquement par rapport au moteur à combustion interne.
Abstract:
An internal combustion engine (10) comprises an engine block (12) defining a cylinder (14) having a longitudinal axis A. A piston (16) is arranged slidably within the cylinder 14 and an impeller 18 is arranged at one end of the cylinder (14). The impeller (18) is rotatably mounted on a shaft (30), which extends out of the cylinder (14) and which is driven in rotation by rotation of the impeller (18). The engine further comprises an anti- rotation formation (20) to prevent the piston rotating about a longitudinal axis of the cylinder and a swirl-inducing vane (38) arranged on the face of the piston which faces the end of the cylinder at which the impeller is arranged. Combustion gas generated by combustion of a fuel in the cylinder between the piston and the impeller is caused to swirl by reaction with the swirl-inducing vane and the swirling combustion gases, in turn, cause the impeller to rotate.
Abstract:
Free piston engines having a free piston having a first piston diameter in a cylinder with a combustion chamber on a first side of the first piston and a piston rod having a second diameter fastened to a second side of the first piston and extending to a single second piston having a third diameter smaller than the first diameter, but larger that the second diameter, the single second piston extending into a hydraulic cylinder, the second piston having a first hydraulic area defined by the third diameter in a first hydraulic chamber, and a second hydraulic area defined by the area between the third diameter and the second diameter in a second hydraulic chamber, and valving to control the coupling of a high pressure, a low pressure and a reservoir to the first and second hydraulic chambers to control the top and bottom dead center positions and velocity of the free piston.
Abstract:
The invention relates to an electric power generator (10), comprising: an internal combustion engine (20) having a piston (22), a linear electric generator (40) for generating an electric current, comprising a linearly movable part (42) which is connected with the piston (22), and a stationary part (44), and an energy storing device (50) for storing the energy which is generated by the linear electric generator (40) by moving the linearly movable part (42) relative to the stationary part (44) during the work cycle of the piston (22), the energy storing device (50) being adapted for applying at least a part of the stored energy to the linear electric generator (40) such that the piston (22) is movable back towards the upper dead center thereof during the exhaust-refresh cycle of the piston (22), as well as a motor assembly equipped therewith.
Abstract:
In accordance with an embodiment of the invention, there is provided a device for generating electrical energy using a thermal cycle of a working gas. The device comprises at least one piston movably mounted in a container to form a working chamber between the at least one piston and the container, the working chamber containing the working gas performing the thermal cycle. An electrical circuit is mounted stationary relative to the container, the electrical circuit being electromagnetically coupled to provide a motive force to the at least one piston. An electronic power converter is electrically connected to the electrical circuit and to an electrical bus, and an electrical storage device is electrically connected to the electrical bus. The at least one piston is movably mounted such that its motion electromagnetically induces current in the electrical circuit. An electronic controller is electronically connected to the electronic power converter to control motion of the at least one piston to perform, in the thermal cycle, at least one of: (i) expanding the working gas beyond the volume at which compression of the working gas is begun within the thermal cycle or (ii) exhausting the working gas to a remaining volume less than the smallest volume of compressed gas within the thermal cycle. The electronic controller further controls flow of electrical energy to and from the electrical bus to effect a net positive average power transfer from the working gas to the electrical bus over the course of the thermal cycle.
Abstract:
Es wird ein Verfahren zum Betreiben einer Freikolbenvorrichtung bereitgestellt, welche mindestens einen Freikolbenmotor mit einem elektrischen Lineartrieb umfasst, wobei der mindestens eine Freikolbenmotor eine Kolbeneinrichtung aufweist, welche unter der Wirkung eines Mediums, das in einem Expansionsraum expandiert, in einer linearen Bewegung angetrieben wird und durch eine Rückfedereinrichtung, welche eine Rückstellkraft ausübt, in einer Gegenrichtung zurückbewegt wird, und wobei die Kolbeneinrichtung an den elektrischen Lineartrieb gekoppelt ist, bei dem ein Kraftprofil eines Kraft-Weg-Verlaufs für die Kolbeneinrichtung vorgegeben wird, dessen Integral über eine Periode einer Bewegung der Kolbeneinrichtung der nutzbaren Arbeit entspricht, welche vom elektrischen Lineartrieb in elektrische Energie wandelbar ist.
Abstract:
An exhaust check valve and piston return system wherein a main exhaust valve is opened as a result of combustion products from the combustion chamber being routed through a signal line. In addition, as a result of the opening of the main exhaust valve, an exhaust check valve, incorporated within a side wall portion of the cylinder housing at a location disposed downstream of the main exhaust valve, as considered in the direction of flow of the exhaust gases out from the combustion chamber, is forced to its open position so as to permit the combustion gases to be exhausted from the combustion chamber, thereby permitting the piston to move upwardly so as to complete its return stroke.
Abstract:
The inventive hydraulic piston internal combustion engine comprises two working cylinders which are provided with pistons (5), a cylinder head (9) provided with inlet and outlet valves (10, 11), wherein a combustion chamber (7) is located in each cylinder between the piston and the head, hydraulic chambers (13, 14) provided with inlet (15, 16) and outlet (17, 18) valves are arranged on the side of the piston opposite to the combustion chamber, a mechanism for converting translation movement of the pistons into the rotational motion of the output shaft is embodied in the form of a plate rotary hydraulic motor (3) which is provided with input (23) and output (24) throats and with a connection hydraulic system (25, 26), and a sleeve (30) provided with a control cock (29) is mounted between the hydraulic chambers. Said invention makes it possible to increase the performance characteristics of the engine.