Abstract:
The present disclosure shows a crankshaft having at least one counterweight that is preferably screwed to the crankshaft via at least two screws, with the counterweight having a contact surface at which it contacts a counter-contact surface of the crankshaft. In this respect, the position of the counterweight at the crankshaft is fixed via at least one positioning element independent of the screw connection.
Abstract:
A crankshaft having a balance weight, the crankshaft a crank pin eccentric to a rotation axis of the crankshaft, a connecting rod connecting the crank pin and a piston, and a balance weight disposed to be opposite to the crank pin in the crankshaft, wherein the balance weight has radius which is a distance between the rotation axis of a crankshaft and an exterior circumferential surface of the balance weight, and wherein the radius of the balance weight is formed differently depending on a rotation direction of the balance weight.
Abstract:
When each of the crank arms is divided by the crank arm centerline-into a right arm portion and a left arm portion, an area moment of inertia of one of the right and the left arm portions that is in a side that is subjected to the maximum load is greater than an area moment of inertia of the other arm portion that is in a side opposite to the side that is subjected to the maximum load, and, the area moment of inertia of the arm portion that is in the side opposite to the side that is subjected to the maximum load is greater than the area moment of inertia of the arm portion that is in the side that is subjected to the maximum load.
Abstract:
A pendulum assembly comprises a cold forged steel pendulum or cold formed steel pendulum attached to a cold forged steel carrier or cold formed steel carrier. The carrier is attached to the crankshaft. The pendulum assembly includes a first outer steel plate, a second outer steel plate, and an intermediate steel plate. The stamped plates are formed from flat sheet steel to provide the pendulum shape and features. The outer steel plates are attached to the intermediate steel plate by any of a variety of methods. The pendulum carrier of the disclosed inventive concept is comprised of one or more steel plates that are also cold forged or cold formed from steel to provide the pendulum carrier shape and features. Alternatively, the pendulum carrier may include two cold forged or cold formed portions attached together or three cold forged or cold formed portions attached together.
Abstract:
An internal combustion rotary engine includes an air passage configured to allow cool air to flow through the rotor as the rotor moves relative to the housing within the engine. Some embodiments include a removable fuel cartridge.
Abstract:
A bumper for a pendulum that cannot inadvertently become loose is disclosed. The pendulum has at least one and preferably a pair of spaced apart, elongated bumpers. The elongated bumpers generally have an L-shape. The pendulum is comprised of two halves. L-shaped channels are formed in each pendulum half. The bumpers are fitted into channels of the same shape formed in the pendulum halves. When the two halves are fitted together, the L-shaped bumper is captured therebetween. Each pendulum half includes an elevated central area and a pair of recessed areas with each recessed area formed on one side of the elevated area. Side walls are formed at the intersections of the elevated area and the recessed areas. A base wall is formed along the lower edge of the elevated area. The bumper ends extend from the elevated area beyond the side walls and base wall.
Abstract:
A flat plane crankshaft for an in-line four cylinder engine includes eight crank arms. A fourth crank arm and a fifth crank arm are respectively provided with counter weights. Each of a width of the fourth crank arm and a width of the fifth crank arm is configured to be smaller than a width of a second crank arm. Each of a width of the third crank arm and a width of the sixth crank arm is configured to be greater than the width of the second crank arm.
Abstract:
A crankshaft in an engine is provided. The crankshaft includes only two outer bearing journals configured to attach to two outer crankshaft bearings, only a single inner bearing journal positioned axially between the two outer bearing journals configured to attach to an inner crankshaft bearing, an unsupported section positioned axially between the inner bearing journal and one of the outer bearing journals, and only three rod journals each configured to attach to a separate piston rod.
Abstract:
A crankshaft for an internal combustion engine having a core formed from a first material and an outer layer formed from a second material, the second material being different from the first material, is disclosed. Both the first and second materials are preferably though not absolutely metals. The crankshaft core is preferably formed from forged steel, such as C1117 AISI or similar steel. The layer formed over the crankshaft core is preferably iron, such as nodular iron. The crankshaft core is preferably formed having an orienting keystone lock at each end. The iron layer formed over the crankshaft core may be of a variety of irons, though nodular iron is preferred. The disclosed crankshaft thus provides an alternative to the traditional forged steel crankshaft by utilizing a low cost, forged steel core and cast a nodular iron outer layer that includes the counterweights, cheeks, post, flange and journals.
Abstract:
An internal combustion engine having two cylinders, which are arranged in “V” configuration and accommodate respective pistons, and a first balancing body, which is fixed to a crankshaft at a first piston so that the first order reciprocating inertial forces of the first piston lie on a first straight line forming a first inclination angle which is not zero with the first cylinder; the combination of an angle between the cylinders with the first inclination angle is such that the first straight line on which the first order reciprocating inertial forces generated by the first piston lies is parallel to a second straight line on which the first order reciprocating inertial forces generated by the reciprocating motion of a second piston lie.