A method to modify the geometry of a connecting rod of an internal combustion engine includes providing a connecting rod having a crankshaft bore at a first end, wherein the first end has a bearing cap and a bottom end portion of the connecting rod, mating the bearing cap with the bottom end portion of the connecting rod to form the crankshaft bore of the connecting rod, machining a width upset portion of the bottom end portion to reduce a width of the bottom end portion of the connecting rod, machining a width upset portion of the bearing cap to reduce a portion of a width of the bearing cap, and reducing the width of the bottom end portion of the connecting rod and the portion of the width of the bearing cap to a width smaller than a cylinder bore of the internal combustion engine.

A method for producing a connecting rod for an internal combustion engine, having a small connecting rod eye for holding a piston pin and having a large connecting rod eye for holding a crank pin, wherein at least one connecting rod eye has at least one geometric deviation from a cylindrical inner contour. It is provided according to the invention that the at least one connecting rod eye is formed by creating a bore with a cylindrical inner contour, and coating the bore with a coating comprising a resin with solid lubricant particles embedded therein. The coating forms the at least one geometric deviation from the cylindrical inner contour of the at least one connecting rod eye.

An apparatus includes a connecting rod having a surface that defines an opening to receive a pin for coupling the connecting rod to a piston at a first end of the connecting rod. The surface includes a groove arrangement to collect, retain and distribute lubrication fluid in the space between the pin and the inner surface. The surface can be formed by the connecting rod or a bushing in an opening of the connecting rod.

An apparatus includes a connecting rod having a surface that defines an opening to receive a pin for coupling the connecting rod to a piston at a first end of the connecting rod. The surface includes a groove arrangement to collect, retain and distribute lubrication fluid in the space between the pin and the inner surface. The surface can be formed by the connecting rod or a bushing in an opening of the connecting rod.

A wrist pin and method of reducing wear between members thereof, a piston, a connecting rod, and methods of construction thereof are provided. The wrist pin has a first portion extending between opposite ends configured for receipt in piston pin bores and a second portion extending between opposite ends configured for receipt in the pin bores. The second portion is configured for relative movement with the first portion. The piston includes a piston body having axially aligned pin bores, wherein at least one of the pin bores has a feature to prevent relative rotation of a wrist pin member. The connecting rod includes a connecting rod body having small end bore. The small end bore has a contour to allow relative rotation of a first wrist pin member therein and a feature to prevent relative rotation of a second wrist pin member therein.

A connecting rod for converting a linear motion of a piston into a rotational motion of a crankshaft may include a small connecting eye for connecting the connecting rod in a rotatable manner to a pin of the piston and a large connecting rod eye for connecting the connecting rod in a rotatable manner to the crankshaft. The connecting rod may include at least one eccentric lubricating groove disposed in at least one of an inner face of the large connecting rod eye, an inner face of the small connecting rod eye, and a bearing bush arranged in the small connecting rod eye. The at least one groove may have an axis inclined with respect to an axis of at least one of the respective small connecting rod eye, large connecting rod eye, and bearing bush.

A method and a device for fracture splitting a connecting rod and a connecting rod formed therefrom are provided, in which a force exerted on an outer rim of an eye of the connecting rod by a separating tool is generated by an electromagnetic force. The separating tool includes at least two separating members inserted into the eye, and the electromagnetic force is generated by displacing the at least two separating members away from each other inside the eye in response to application of the electromagnetic force. The electromagnetic force may be generated by passing current through coils positioned between the at least two separating members in a manner that causes the coils to repel one another, preferably with a pulse duration of less than 100 microseconds, in order to minimize plastic deformation at the fracture locations.

An apparatus includes a connecting rod having a surface that defines an opening to receive a pin for coupling the connecting rod to a piston at a first end of the connecting rod. The surface includes a groove arrangement to collect, retain and distribute lubrication fluid in the space between the pin and the inner surface. The surface can be formed by the connecting rod or a bushing in an opening of the connecting rod.

In one or more embodiments, a coated connecting rod includes a first head including a first aperture, a second head including a second aperture, and a body connecting the first and second heads along a longitudinal axis, wherein the first head further includes face and back thrust surfaces abutting the first aperture and an anti-friction coating partially contacting at least one of the face and back thrust surfaces.

A connecting rod for a device includes a rod having a large end, and a cap attached to the large end. The large end of the rod and the cap cooperate to define a first side surface and a second side surface disposed opposite to each other. The large end of the rod and the cap further define a crankshaft bore that extends along a crank axis between the first side surface and the second side surface. A thrust surface is defined by at least one of the first side surface or the second side surface, and is disposed on a thrust plane. The thrust surface includes at least one recessed region that extends inward away from the thrust plane of the thrust surface. Each of the thrust surfaces include ramps that extend between the recessed regions and the flat regions at the thrust plane of the thrust surface.