12results about "Free piston engines" patented technology

A linear electromechanical system comprising: a stator comprising at least a first stator electronic circuit and a second stator electronic circuit or circuit set; a free piston mover movable in a reciprocating manner relative to the stator. The free piston comprising: a piston surface; a transducer configured such that an electromagnetic force is applicable on the free piston mover by one or more of the stator electronic circuits or one or more of the circuit set; and one or more transducer electronic circuits. The system further comprising a switching device for each of the first stator electronic circuit and the second stator electronic circuit or each of the circuit set, such that the current in each of the first stator electronic circuit and the second stator electronic circuit or each of the circuit set is independently controllable, and wherein at least one of the transducer electronic circuits is configured to receive power from at least one of the independently controllable stator electronic circuits or at least one of the circuit set during at least part of a stroke of the free piston mover.

The present invention relates to an internal combustion engine comprising a first cylinder (6) with a first piston (1) movably arranged therein, and a second cylinder (37) with a second piston (33) movably arranged therein. The first and second cylinders (6, 37) each contain a first chamber (5, 39) and a second chamber (7, 36), wherein the first chamber (5, 39) is arranged on one side of the first / second piston (1, 33) and is configured as a combustion chamber (5, 39), and the second chamber (7, 36) is arranged on an opposite side of the first / second piston (1, 33) and contains a fluid, in particular a hydraulic fluid. The first piston (1) and the second piston (33) are fluidically coupled and move back and forth in opposite directions within the first and second cylinders (6, 37).Furthermore, the internal combustion engine has a turbine (23) with a rotor (23) connected to a shaft (18), the turbine (23) being fluidically connected to the second chamber (7, 36) of the first and second cylinders (6, 37). The internal combustion engine is configured to induce a rotation of the rotor (22) of the turbine (23) and a return stroke of the second piston (33) by a forward stroke of the first piston (1), and vice versa, to induce a rotation of the rotor (22) of the turbine and a return stroke of the first piston (1) by a forward stroke of the second piston (33).

The application provides a kind of multi-module free piston engine group admission timing control method and system, it is related to internal combustion engine admission control technical field, method includes: with the time that piston reaches reference displacement as cycle timing reference;Based on cycle timing reference, the opening time and closing time of each admission splitter valve are calculated;Based on opening time and closing time, the mathematical model of the coupling aerodynamic system of common admission cavity-scavenging tank is established;According to the mathematical model of coupling aerodynamic system, a multi-objective optimization function is constructed;Set constraint condition;Under the constraint condition, according to the multi-objective optimization function, the optimal admission timing parameters and the optimal performance index value are solved by double-layer optimization algorithm;According to the optimal admission timing parameters and the optimal performance index value, the admission timing of engine group is controlled.The application can ensure that multi-module engine runs stably and efficiently in limited space.

A free-piston engine, comprising at least one cylinder group, wherein each cylinder group comprises two cylinders arranged opposite each other; pistons of the two cylinders in each group are connected to each other by means of a push rod (3); and each push rod (3) is provided with a rack (31). The free-piston engine further comprises a transmission unit, which comprises a swing gear (4), a first one-way clutch (5a), a second one-way clutch (5b), a first power output member (6a) and a second power output member (6b), wherein the swing gear (4) is rotationally arranged about a fixed axis, the swing gear (4) meshes with the rack (31), the swing gear (4) is connected to the first power output member (6a) by means of the first one-way clutch (5a), and the swing gear (4) is connected to the second power output member (6b) by means of the second one-way clutch (5b). In the free-piston engine, a complex transmission mechanism composed of a push rod, a crankshaft and the like in the prior art is eliminated, and a reciprocating linear motion of a piston is converted into a rotary motion, so as to output power in a rotational form.

The application discloses a kind of based on hydrogen combustion and micro needle electrode ignition ultra-high energy density micro engine device and preparation method thereof, belong to micro electro mechanical system and micro energy technology field.The device mainly includes top cylinder shell, bottom cylinder shell, piston, top plug-in unit and bottom plug-in unit.It is in that a pair of opposite micro needle electrode in micro combustion chamber ignites pre-mixed hydrogen / oxygen, generates high-temperature high-pressure gas to push piston to carry out two-stroke reciprocating motion, to convert chemical energy directly into mechanical energy.The device adopts unique combustion chamber flow channel design, combined with the flow divider on piston, effectively optimizes scavenging process, reduces fuel short circuit, improves gas exchange efficiency.

Providing core synchronization for linear generators. [Solution] A system and method for controlling two or more linear generators are provided, each operating according to repeating behavior so as to form a cycle. The control system utilizes a control circuit network to determine a desired phase offset between the operating cycles of a first linear generator and a second linear generator among the two or more linear generators. During operation, the actual phase offset between the first linear generator and the second linear generator is determined. The control circuit network of the control system is used to modify the operation of at least one of the first or second linear generators to achieve a desired phase effect.

A linear electric machine includes a shaft, a primary piston assembly operably coupled with the shaft, a stator assembly supporting the shaft and housing a load device, and a bearing assembly supporting an end of the shaft. The bearing assembly includes a bearing housing and a fluid bearing within the bearing housing. The bearing housing includes an opening for receiving the shaft therethrough. The linear electric machine also includes a secondary piston assembly formed integrally with the shaft and at least a portion of the bearing assembly for providing fluid to the bearing assembly.