Abstract: A power end frame assembly for a reciprocating pump that includes a first and second end plate segment each including annular bearing support surfaces configured to support a crankshaft bearing assembly. At least one middle plate segment is disposed between the first and second end plate segments and includes an annular bearing support surface configured to support a crankshaft bearing assembly. The annular bearing support surfaces of the first and second end plate segments and the at least one middle plate segment each have a diameter and are coaxially aligned. The diameter of at least one of the first and second end plate segments is different from the diameter of the at least one middle plate segment to facilitate insertion and removal of the crankshaft bearing assembly from the power end frame assembly.

Abstract: A crankshaft (4) with a first central axis (A), has at least two main bearing journals (12), through which the first central axis (A) extends. At least one crankshaft web (10) is arranged between the main bearing journals (12), wherein the at least one crankshaft web (10) comprises two crank discs (14) connected with each other via a crankpin (16) with a second central axis (B). At least one crank disc (14) has a recess (26) with a planar bottom surface (28), wherein the recess (26) is adapted in the at least one crank disc (14) in such a way that the second central axis (B) of the crankpin (16) cuts the planar bottom surface (28). That planar bottom surface (28) is oriented at a right angle in relation to the direction of the second central axis (B) of the crankpin (16). A bore (30) with a third central axis (C) extend through the planar bottom surface (28) of the recess (26), through the at least one crank disc (14), and into the at least one crankpin (16).

Abstract: A complex cast component of an internal combustion engine, in particular a crankshaft or a camshaft, has a longitudinal axis, a plurality of regions, along the longitudinal axis, and a first cavity. Each of the plurality of regions has a certain cool-down rate during a solidification process of a casting process. The first cavity is arranged in a first region of the plurality of regions and has a volume that depends on a first cool-down rate of the first region. In this way, a material thickness in the first region likewise depends on the first cool-down rate.

Abstract: A four stroke internal combustion engine with dedicated exhaust gas recirculation and method of operating such engine, wherein the engine comprises a plurality of combustion cylinders including main cylinders and a dedicated exhaust gas recirculation cylinder, wherein each cylinder includes a piston; a crankshaft, which is rotatable in a direction, and defines a main crankshaft axis, and includes a plurality of crankpins. Each of the crankpins is coupled to at least one of the pistons. The crankpins affixed to the pistons of the main cylinders are spaced at an interval around the main crankshaft axis. The crankpin affixed to the piston of the dedicated exhaust gas recirculation cylinder is spaced at an offset of 5 to 50 degrees from the interval in either direction relative to the direction of crankshaft rotation.

Abstract: Disclosed is an electronic disc brake. The electronic disc brake includes a disc configured to rotate with vehicle wheels, a caliper housing configured to operate pad plates installed at both sides of the disc, and an actuator having a piston provided inside the caliper housing to come into close contact with the disc, a spindle rotatably installed at the caliper housing to reciprocate the piston, an electric motor configured to rotate the spindle, and a decelerator configured to transmit a rotational force of the electric motor to the spindle, in which the decelerator includes a power connection unit directly connected to the electric motor, and first and second deceleration gear units sequentially connected to the spindle, and the first deceleration gear unit includes a worm gear.

Abstract: A power end frame assembly for a reciprocating pump that includes a first and second end plate segment each including annular bearing support surfaces configured to support a crankshaft bearing assembly. At least one middle plate segment is disposed between the first and second end plate segments and includes an annular bearing support surface configured to support a crankshaft bearing assembly. The annular bearing support surfaces of the first and second end plate segments and the at least one middle plate segment each have a diameter and are coaxially aligned. The diameter of at least one of the first and second end plate segments is different from the diameter of the at least one middle plate segment to facilitate insertion and removal of the crankshaft bearing assembly from the power end frame assembly.

Abstract: A crankshaft for an internal combustion engine comprises at least four main journals aligned on a crankshaft axis of rotation and at least three crankpins, each crankpin being disposed about a respective crankpin axis and positioned between the main journals. Each of the respective crankpin axes is oriented parallel to, and spaced radially from, the crankshaft axis of rotation. Each of the crankpins is joined to a pair of crank arms for force transmission between the crankpin and the pair of crank arms. Each pair of crank arms is joined to a respective main journal for transmitting torque between the pair of crank arms and the main journal. At least two of the crankpins are spaced radially a first semi-stroke distance from the crankshaft axis of rotation, and a third crankpin is spaced radially a second semi-stroke distance from the crankshaft axis of rotation.

Abstract: A crankshaft has a receiving platform for catching lubricant dropping from a main bearing assembly. The receiving platform has at least one wall disposed thereon. The wall has one point that is the furthest from the rotational axis of the crankshaft. One channel is defined in the platform and has an inlet disposed close to the point of the wall that is furthest from the rotational axis of the crankshaft. The channel has an outlet in the vicinity of a connecting rod bearing assembly, so that lubricant dropped on the receiving platform will flow to the connecting rod bearing assembly.

Abstract: A crankshaft for an internal combustion engine comprises at least five main journals aligned on a crankshaft axis of rotation and at least eight crankpins, each of the crankpins being disposed about a respective crankpin axis and positioned between the main journals. Each of the respective crankpin axes is oriented parallel to, and spaced radially from, the crankshaft axis of rotation. Each of the crankpins is joined to a pair of crank arms for force transmission between each of the crankpins and the respective crank arms. Each crank arm is joined to a respective main journal for transmitting torque between the crank arm and the main journal. At least four of the crankpins are spaced radially a first semi-stroke distance from the crankshaft axis of rotation, and at least four remaining crankpins are spaced radially a second semi-stroke distance from the crankshaft axis of rotation.

Abstract: A forged crankshaft includes a plurality of main journals, a plurality of crank pin journals rotatable in a circular path about axes defined by the main journals, and a plurality of crank webs. At least one crank web of the plurality of crank webs defines a middle crank web which is located between and connects two neighboring crank pin journals of the plurality of crank pin journals. The middle crank web has a stress relief forged therein, which is defined by first and second spaced sidewalls, an inner wall and a base wall. The forged-in stress relief has a predetermined depth, wrap angle, radius, and undercut which together define a shape of the forged-in stress relief. The shape of the forged-in stress relief is controlled to reduce stress in the crankshaft.

Abstract: A crankshaft for an internal combustion engine comprises at least five main journals aligned on a crankshaft axis of rotation and at least eight crankpins, each of the crankpins being disposed about a respective crankpin axis and positioned between the main journals. Each of the respective crankpin axes is oriented parallel to, and spaced radially from, the crankshaft axis of rotation. Each of the crankpins is joined to a pair of crank arms for force transmission between each of the crankpins and the respective crank arms. Each crank arm is joined to a respective main journal for transmitting torque between the crank arm and the main journal. At least four of the crankpins are spaced radially a first semi-stroke distance from the crankshaft axis of rotation, and at least four remaining crankpins are spaced radially a second semi-stroke distance from the crankshaft axis of rotation.

Abstract: A crankshaft for an internal combustion engine comprises at least four main journals aligned on a crankshaft axis of rotation and at least six crankpins, each being disposed about a respective crankpin axis and positioned between the at least four main journals. Each of the respective crankpin axes is oriented parallel to, and spaced radially from, the crankshaft axis of rotation. Each of the at least six crankpins is joined to a pair of crank arms for force transmission between each of the at least six crankpins and the respective pair of crank arms. Each crank arm is joined to a respective main journal for transmitting torque between the crank arm and the main journal. The at least six crankpins are disposed asymmetrically about the crankshaft axis of rotation.

Abstract: A crankshaft for an internal combustion engine comprises at least four main journals aligned on a crankshaft axis of rotation and at least three crankpins, each crankpin being disposed about a respective crankpin axis and positioned between the main journals. Each of the respective crankpin axes is oriented parallel to, and spaced radially from, the crankshaft axis of rotation. Each of the crankpins is joined to a pair of crank arms for force transmission between the crankpin and the pair of crank arms. Each pair of crank arms is joined to a respective main journal for transmitting torque between the pair of crank arms and the main journal. At least two of the crankpins are spaced radially a first semi-stroke distance from the crankshaft axis of rotation, and a third crankpin is spaced radially a second semi-stroke distance from the crankshaft axis of rotation.

Abstract: A crankshaft for a V8 engine includes first, second, third, fourth, fifth, sixth, seventh and eighth crank pins defined on the crankshaft. The second crank pin is rotationally offset from the first crank pin, the third crank pin is rotationally offset from the first and second crank pins, the fourth crank pin is rotationally offset from the first, second and third crank pins, the fifth crank pin is rotationally offset from the first, second, third and fourth crank pins, and the sixth pin is rotationally offset from the first, second, third, fourth and fifth crank pins. The seventh crank pin is rotationally aligned with the first crank pin and the eighth crank pin is rotationally aligned with the second crank pin.

Abstract: A bearing system can reduce the relative velocity between a bearing member and a rotation shaft and a rotating member to decrease a load on the bearing member although the rotation shaft and the rotating member rotate in opposite directions with the bearing member therebetween. The bearing system includes a case and a rotation shaft supported by the case. A rotating member is disposed coaxially outside the rotation shaft and rotates in the direction opposite to that of the rotation shaft. A housing is interposed between the rotation shaft and the rotating member and is fixed to the case. A bearing member that rotatably supports the rotating member is interposed between the housing and the rotating member.

Abstract: A crankshaft (1) includes a first to a sixth crank pin (41–46), a first to a fourth main journal (21–24) and a first to a ninth crank arm (61–69). At least the first, the second, the eighth and the ninth crank arms (61, 62, 68, 69) have respective integral counterweights (61?, 62?, 68?, 69?) for balancing the crankshaft (1). In order to reduce bending stress on the areas where the second and the eighth crank arms (62, 68) are connected to the respective pairs of adjacent crank pins (41–42, 45–46), the axial dimensions of the first and the ninth crank arms (61, 69) are reduced, being substantially the same as those of the adjacent crank arms (62, 68) in order that the axial length of the two end spans of the crankshaft is the same as that of the intermediate span. In order to balance the crankshaft (1), two additional counterweights (71, 72) are arranged outwardly of the end journals (21, 24) and their axial dimensions are comparable to those of the end crank arms (61, 69).

Abstract: A crankshaft has a helical drive gear formed as one of the crank webs at an end portion thereof. Another crank web outside of the drive gear is made in two parts, an integral balance weight mounting portion and a removable balance weight. In one embodiment, a crankshaft 12 features a crankshaft body 33 including a gear 24 for outputting rotation formed on one side of a crankpin 17d. The crankshaft also includes a first balance weight mounting portion 30g formed on the other side of the crankpin 17d and a first balance weight 31g to be mounted to the first balance weight mounting portion 30g. The crankshaft body 33 may be formed with a second balance weight mounting portion 30a separately from the first balance weight mounting portion 30g, and a second balance weight 31 a mounted to the second balance weight mounting portion.

Abstract: In a fuel injection pump, fuel pressurized by a feed pump is supplied to an accommodation chamber via a communication path having an orifice. An end of the communication chamber on a side of the accommodation chamber is positioned to face an axial end of a minute space between sliding contact portions of a cam and a bush when the cam is at a given angular position. The fuel fed from the feed pump is injected from the end of the communication path axially deep into the minute space between the sliding contact portions so that oil film for lubrication is formed on the sliding contact portions, resulting in suppressing frictional seizure of the sliding contact portions.

Abstract: A multiple crank drive for working machines, in particular for diaphragm pumps, with a crankshaft, which is disposed in a housing and which exhibits at lest two bearings, can be driven by a drive, in particular a gear, and in turn drives by a crank drive, one of several piston rods of the working machines. The drive is designed in such a manner that the crankshaft is suspended in the housing.

Abstract: An end cap assembly for an air compressor driven by an internal combustion engine has a crankshaft structure provided with a shaft, an end cap disposed around the shaft, a first set of ball bearings mounted in the end cap for disposition around the shaft and a second set of ball bearings mounted in the end cap and spaced from the first set of ball bearings for disposition around the shaft. A crankshaft seal and bearing spacer arrangement is disposed around the shaft between the first and second sets of ball bearings for blocking passage of air and oil from the engine, and preventing the first and second sets of ball bearings from contacting each other.

Abstract: A connecting rod and crankshaft assembly comprising a crankshaft having an axis and including axially spaced end bearing surfaces in concentric relation to the axis, an arcuate throw portion extending from one of the end bearing surfaces and along a curvilinear axis and including a maximum cross section which extends perpendicularly to the curvilinear axis and which includes a maximum rectilinear distance passing through the curvilinear axis, and a crank pin extending from the throw portion in eccentric relation to the axis, a connecting rod comprising an elongated main body, and a crank pin end portion extending from the main body and including a cylindrical surface extending along an axis extending perpendicularly to the elongation of the main body and defining a crank pin aperture receiving the crank pin, and axially spaced side surfaces each including a first side surface portion located adjacent the main body and extending for an arcuate distance around the axis of less than 180 degrees, which first side

Abstract: A crankshaft of a V-type 6-cylinder internal combustion engine including first to sixth crank pins connected with connecting rods, having first to fourth crank journals between the first to sixth crank pins, and first to ninth crank arms between first to sixth crank pins and the first to fourth crank journals, the combination including a first balance weight provided to the first crank arm, a center of gravity of the first balance weight being mal-distributed to a lower part with respect to a center axis of the crankshaft, a second balance weight provided to the second crank arm, a center of gravity of the second balance weight being mal-distributed to a lower part, and deviated from the first balance weight in a counterclockwise direction, third and fourth balance weights provided respectively to the fourth crank arm and sixth crank arm, the centers of gravity of the third and fourth balance weights being mal-distributed to be orthogonal to the center of gravity of the first balance weight in a clockwise dir

Abstract: A crankshaft eccentrically mounted to the engine block bearings of an internal combustion engine for providing improved volumetric efficiency. A modified crankshaft journal and engine block bearing structure is provided at each crankshaft support location so that the connecting rod bearings rotate about an eccentric centerline (EC.sub.L). Eccentricity is achieved by off-setting the crankshaft journals a predetermined distance above the original true centerline (TC.sub.L) of the crankshaft, preferably on the order of about one-quarter to one-half inch. The top dead center (TDC) of each piston remains the same relative to its cylinder, but the bottom dead center (BDC) of each piston relative to its cylinder is lowered by the amount of the off-set because the engine block bearings are lowered with respect to the true centerline of the crankshaft by the amount of the off-set on the crankshaft journals.

Abstract: A crankshaft for an internal-combustion engine has crankshaft webs provided with recesses. The recesses are molded into the crankshaft webs in each case symmetrically with respect to a vertical longitudinal center plane oppositely within a clear outer contour of the crankshaft webs. In the area of the recesses, the sections are constructed as a U-shaped profile with side legs. Between the recesses of the crankshaft webs arranged above one another, a reinforcing rib is arranged in the overlapping area of the crank pin and the journal. As a result of the recesses in each crankshaft web which are arranged in a targeted manner, a reduction in weight is made possible with effective mass compensation. The recesses are arranged above one another such that in the endangered area of each crankshaft web, a cross-section is built up that is as large as possible and can absorb the flexural and torsional load in a defined manner, despite the maximally large recesses.

Abstract: The invention relates to a crankshaft drive for an internal-combustion engine of V-type having a crankshaft with two mutually offset crank pins per throw, the pins being inter-connected via a narrow intermediate element. In order to ensure an optimum axial guidance of two connecting rods mounted rotatably on the crank pins, even without an intermediate web, the intermediate element has a cross-sectional area which largely corresponds to the overlapping sectional areas of the two crank pins. Moreover, each connecting rod is guided by means of an axial stop surface arranged on the large connecting rod eye of the adjacent connecting rod.

Abstract: The invention relates to a crankshaft drive for an internal-combustion engine of V-type with a crankshaft, which has two mutually offset crank pins per throw, which pins are interconnected via an intermediate web. In order both to minimize the amount of machining required on the intermediate web and to ensure an optimum axial guidance of two connecting rods mounted on the crank pins, the intermediate web has an axial stop collar on either side and the intermediate web is of an enlarged design such that the axial stop surface of the connecting rods cannot jut out from the projected area of the intermediate web in any crankshaft position.

Abstract: A V-shaped crankarm so arranged, constructed, and mounted that when the piston and piston pin are at top dead center and the greatest resistance to the downstroke is made by the crankarm, the V-crankarm will affect the resistance to the downstroke and transfer the power of the downstroke to rotation of the crankarm and the crankarm.

Abstract: A cast crankshaft with recesses or apertures provided in crank webs of the crankshaft and are formed in adjoining inner area of the casting material forming the main and crank pins by cores inserted therein prior to casting for the reduction of the weight and of the rotating out-of-round masses as well as of the counterweights thereof. A ratio of the smallest distance of the fillet of the crank pin from the outer surface line of the recess to the diameter of the crank pin lies between the values of 0.45 and 0.66, preferably at a ratio of about 1:2 with such distance being approximately as large as the distance between adjacent fillets at the crank and main pins from one another.

Abstract: A crank shaft for a multi-cylinder, short stroke internal combustion engine in which the diameters of the crank pin and of the shaft journal overlap each other, and in which the crank web decreases in thickness approximately from the center of the crank pin with increasing distance from the shaft center. In the crank webs within the region of the crank pin, relief bores are provided the axes of which are inclined with regard to the axis of said shaft journals. The relief bores are designed as blind bores with a flat bottom surface and with a circumferential surface merging with the flat bottom surface along a rounded surface section. The merging portion nearest to the area of the respective pertaining shaft journal is located approximately in the plane perpendicular to the longitudinal axis of the crank shaft and approximately in the middle between the crank pin and the shaft journal. With a diameter ratio of the crank pin to the shaft journal of about 0.

Abstract: An engine is disclosed having pistons in operative connection with a crankshaft. A bearing member, defining a curved periphery, is carried on the crankshaft for eccentric rotation thereabout in a direction transverse to the major axis of the crankshaft, with the periphery of the bearing member being positioned to be in power-transmitting, sliding relationship with a connection to the piston. The bearing member is adapted for transverse displacement by the piston rod relative to the crankshaft, while transmitting power to the crankshaft, to absorb any shock generated against the piston and the crankshaft, such as by "engine knock." The bearing member is also adapted for return to its predisplacement position after absorbing the shock.