Patent ID: 8511276
Filing Date: 2013-08-20
Classification: F01C,F02B,Y10T

Abstract:
1. A cat-and-mouse internal combustion engine comprising: an engine body; first and second rotors each having a rotor shaft; first and second one-way clutches between the engine body and the first and second rotor shafts; correlating crankshafts including projecting colliding parts and collision receiving parts with buffer materials; a cylinder housing; concentric rotor shafts outwardly extending from the cylinder housing two planet gears having respective central rotational axes and respectively including eccentric rods in an identical phase at an identical distance from the rotational axes; link members having an identical length to rotate about an axis; eccentric rods projecting from the two planet gears at a right angle through the link members; first and second piston members each including a plurality of pistons, the pistons being configured to partition the cylinder housing into six chambers, at least one of the chambers serving as an explosion expansion chamber during an explosion stroke, and the pistons being arranged in sets of three at a pitch of 120° in each of the rotors; an output arm having first and second ends, an axis at the first and second ends and an output shaft at a center of the output arm; a fixed internal gear frame having a number of teeth that is three times as large as a number of teeth of each of the planet gears; an air intake port; an air exhaust port; an ignition plug or a fuel injection nozzle; a coolant intake port, a coolant injection nozzle, and a coolant drain port, wherein the crankshafts are configured to collide against each other at an angle and are attached to ends of the concentric rotor shafts, and the correlating crankshafts are respectively coupled to the eccentric rods, wherein the link members are configured to become tense to transmit, to the correlating crankshafts, rotational forces on the pistons at front portions of the explosion expansion chamber in the explosion stroke, and the link members are configured to relax and bend to prevent reverse rotational forces on the pistons at rear portions of the explosion expansion chamber from being transmitted to the connected correlating crankshafts, wherein the central rotational axes of the two planet gears are rotatably disposed to be symmetric with respect to the axis at the first and second ends of the output arm, and configured to orbit around the output shaft at the center of the output arm together with rotation of the output arm, wherein the two planet gears are internally meshed with the fixed internal gear frame and configured to rotate with sun-and-planet motion such that the planet gears revolve once and rotates three times for every turn of the output shaft and the output arm, wherein rotation of the output shaft is configured to cause the two eccentric rods to form a common path and to rotate with a periodic change in angular velocity, while being shifted by 120° when viewed from the output shaft, wherein the change in angular velocity is transmitted through the link member and the correlating crankshafts so that rotation is performed with an increase/decrease of a volume of each of the six chambers, wherein when the engine is in the explosion stroke, the one-way clutches receive reverse rotational forces on the pistons at the rear portions of the explosion expansion chamber to prevent reverse rotation of the pistons and to support an effective transfer of an explosion expansion pressure to the pistons, wherein the air intake port, the air exhaust port, and the ignition plug or a fuel injection nozzle are provided in the cylinder housing so that portions of the pistons in the cylinder housing whose chamber volume increases with rotation are used for an intake stroke, wherein portions of the pistons whose chamber volume at front portions of the pistons in a rotational direction decreases are used for a compression stroke; wherein portions of the pistons whose chamber volume increases with further rotation are used for an explosion stroke, wherein portions of the pistons whose chamber volume at front portions of the pistons decreases are used for an exhaust stroke, and wherein the coolant intake port, the coolant injection nozzle, and the coolant drain port are provided in the cylinder housing so that remaining chamber-volume increase portions and chamber-volume decrease portions before one turn of the pistons are used as cooling chambers for coolant intake and coolant drain.