3 results about "Free-piston engine" 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 application discloses a two-stroke free piston engine, which comprises two opposite cylinders, a swing gear, a first one-way clutch, a second one-way clutch, a first power output and a second power output, and a piston connected through a push rod, wherein the swing gear is engaged with a rack on the push rod, the swing gear is connected with the first power output through the first one-way clutch and connected with the second power output through the second one-way clutch, and the piston makes a linear reciprocating motion once to form a first stroke and a second stroke in sequence, and in each stroke, one cylinder works and the other cylinder compresses to ensure the output power of each stroke, and the power of the two power outputs is coupled and then outputted as continuous power through a transmission unit. Thus, the complex transmission mechanism formed by the push rod, the crankshaft and the like in the prior art can be cancelled, the linear reciprocating motion of the piston is converted into rotary motion, the power in the rotary form is outputted, and the engine efficiency is improved.

The application discloses a four-stroke free piston engine, which comprises two groups of oppositely arranged cylinders, a swing gear, a first one-way clutch, a second one-way clutch, a first power output and a second power output, wherein the swing gear is arranged in a fixed shaft rotation mode, the pistons of two cylinders in each group are connected through push rods, the swing gear is engaged with the racks on the two push rods, each cylinder sequentially completes an intake stroke, a compression stroke, a working stroke and an exhaust stroke, four strokes form one working cycle, and the piston of one cylinder is always working, and the other three cylinders are synchronously driven to complete an intake stroke, a compression stroke and an exhaust stroke respectively, so that the complicated parts such as the push rod, the crankshaft, the high-pressure oil bearing and the high-pressure oil pump in the prior art can be cancelled, the linear reciprocating motion of the piston is converted into rotary motion, the power in a rotary mode is output, the engine efficiency is improved, and the engine is suitable for being used as the engine of HEV, PHEV and REEV vehicles.