Abstract: A rotary internal combustion engine includes a cylinder seat and a power wheel. The cylinder seat has a circular cylinder, at least one first explosion chamber disposed on a cylinder wall, and an ignition system, a fuel supply system, a compression assembly, an exhaust and an intake installed thereon for each respective first explosion chamber. The power wheel is slidably coupled to the circular cylinder, and has at least one compression chamber and a second explosion chamber disposed adjacent thereto and when rotated provides connection to the first explosion chamber. As a result of rotation of the power wheel, air and fuel gas are compressed in the compression chamber, collected into the first and second explosion chambers, and then ignited by the ignition system to produce a high explosive yield, so that the power wheel is rotated constantly in a single direction to provide high-efficiency kinetic energy.

Abstract: Disclosed is a single-stroke internal combustion engine including a cylinder seat and a power wheel. The cylinder seat has a circular cylinder, at least one first explosion chamber disposed on a cylinder wall, and an ignition system, a fuel supply system, a compression means, an exhaust means and an intake means installed at the external periphery of the cylinder seat corresponsive to each respective first explosion chamber and communicating with the cylinder. Each ignition system is corresponsive to the first explosion chamber; the power wheel is slidably coupled to the circular cylinder of the cylinder seat, and has at least one compression chamber and a second explosion chamber disposed adjacent to each other and rotably corresponsive to the first explosion chamber, fuel supply system, compression means, exhaust means and intake means of the cylinder seat.

Abstract: An improved wheelchair driving apparatus includes a driving rod pivotally installed at an axle of each driving wheel on both sides of a chair frame, and an external end of the driving rod being extended from an external rim of the driving wheel, a brake module installed at a position corresponding to the driving wheel and provided for fixing and releasing the driving wheel by a hand brake, such that users can release the driving wheel through the brake module by both hands to freely swing the driving rod back and forth or fix the brake module to the driving wheel through the hand brake to swing the driving rod back and forth to drive the driving wheel to move forward or backward, such that the wheelchair can be operated and controlled in an easier, more, conveniently, cleaner, less effort and safer manner.