Entries |
Document | Title | Date |
20080202463 | Balancing shaft unit - A balancing shaft unit for balancing inertia or torque in an internal combustion engine of a motor vehicle. The balancing shaft unit includes a housing part and at least one balancing shaft having at least one counterweight. The housing part is made in one piece and has at least two integrated bearing sections with a respective bearing opening. A respective cut-out is formed at longitudinal ends of the balancing shaft in which a respective bearing pin is arranged that is rigidly connected to the balancing shaft and which has a cylindrical bearing section that is supported in a respective one of the bearing openings. | 08-28-2008 |
20080216789 | Engine balancer system - An engine balancer system is provided in which a balancer housing ( | 09-11-2008 |
20080257296 | In-Line Four Cylinder Engine for Vehicle and Vehicle Provided With the Engine - [PROBLEMS] To enhance freedom in designing an engine, improve acceleration feeling, provide extremely excellent driving feeling, and enable an engine to be more compact. [MEANS FOR SOLVING PROBLEMS] An in-line four-cylinder engine for a vehicle has a two-plane 90° crankshaft ( | 10-23-2008 |
20080276897 | System and Method for Operation of an Engine Having Multiple Combustion Modes and Adjustable Balance Shafts - A method of operating an engine having an adjustable balance shaft may comprise adjusting operation of the balance shaft during engine operation in response to an engine combustion mode. For example, balance shafts may be disabled during SI mode and enabled during HCCI mode. Various alternative examples may also be used. | 11-13-2008 |
20080276898 | High fuel efficiency flywheel and cylinder internal cambustion engine hybrid (abbreviated as F&C engine hybrid) - F&C engine includes a central shaft mounted a cylindrical cam, that formed with two pieces of different diameter steel tubes, as the inner and outer walls, the upper end of the outer wall, placed a driving flange, to drive the engine timing devices. on the two layer walls (for light duty or small engine the single layer wall is acceptable) with pairs of peak and valley channel, a overdrive clutch; inside the cam contained a dynamotor to form a hybrid; a magnetic clutch, for engaging or disengaging the cylindrical cam; a driving plate for driving the devices that not related to the engine timing; a cylinder to produce power and transfer the power to the cam through a push rod; a guide plate to guide the push rod; many support rollers for supporting the cam; a tubular case with foot for contain and support the engine. | 11-13-2008 |
20090000589 | Recreational vehicle engine design - A device for damping torsional vibrations in internal combustion piston engines having three or fewer cylinders is provided. The device includes a crankshaft having at least one detachable counterweight. The counterweight is a shiftable, torsional pendulum de-tuner. The pendulum de-tuner is configured to balance at least one order of acceleration of the crankshaft. | 01-01-2009 |
20090038575 | Balancer apparatus of engine - A pump chamber is arranged on the side of a balancer shaft on a vehicle backward side of the two balancer shafts. An oil strainer for sucking oil into an inlet passage is arranged on a vehicle forward side of the axis of the balancer shaft on the vehicle forward side of said two balancer shafts. The inlet passage and the delivery passage are overlaid in the vertical direction and oriented to one side in the circumferential direction of the pump chamber, and the inlet passage and the delivery passage are arranged in a state where they are rectilinearly extended from the pump chamber in the vehicle forward direction. | 02-12-2009 |
20090044779 | COMPENSATING SHAFT - A compensating shaft ( | 02-19-2009 |
20090050100 | MULTI-CYLINDER INTERNAL COMBUSTION ENGINE - A multi-cylinder internal combustion engine in which pistons provided in a plurality of cylinders are coupled to a crankshaft by connecting rods, an oil pan for storing oil is mounted below a crankcase, and a balancer device which has a balancer shaft driven to rotate in accordance with rotation of the crankshaft and a balancer housing for accommodating the balancer shaft is housed between the crankcase and the oil pan, the multi-cylinder internal combustion engine having a heat transfer member that is provided between the balancer housing and the oil pan and below the balancer shaft, and comes into contact with the balancer housing and the crankcase. | 02-26-2009 |
20090064962 | Balancer apparatus of engine - In a balancer apparatus of an engine having an oil pump, a space on a chain side and a space on an oil strainer side are partitioned by a projecting portion projecting in a direction which perpendicularly crosses balancer shafts in a balancer housing formed on an oil pump housing. An oil strainer is attached to a side wall on the anti-chain side of the projecting portion, and a chain tensioner for applying tension to a chain is arranged in the space on the chain side formed by enlarging the attaching surface of the oil pan outwardly so as to enclose the projecting portion. Thus oil which has been stirred by the chain and in which air has been mixed is prevented from being sucked into the oil strainer. | 03-12-2009 |
20090120402 | METHOD FOR OPERATING AN INTERNAL COMBUSTION ENGINE - Angular adjustment of a camshaft in an internal combustion engine. A vibrational condition of the camshaft is recorded, and an enabling of the camshaft adjustment and/or the use of the instantaneous value of the camshaft position are/is dependent at least temporarily on the recorded vibrational condition. | 05-14-2009 |
20090133661 | Balance shaft unit - The present invention relates to a balance shaft unit for mass balancing for an internal combustion engine of a motor vehicle including at least one balance shaft having at least one balance weight and a housing part in which the balance shaft is journaled. A first gear is associated with the balance shaft and meshes with a second gear. An introduction passage is formed in the housing part through which, starting from an assembly opening, at least one of the two gears can be introduced into the interior of the housing part, with the introduction passage extending perpendicular to the longitudinal axis of the balance shaft. The first gear and the second gear are arranged sequentially with respect to the direction of extent of the introduction passage. The housing part surrounds the periphery of the assembly opening in one piece, with the length of the assembly opening at the outer side of the housing part in a normal plane to the longitudinal axis of the balance shaft being smaller than the sum of the diameters of the two gears. A particularly high stability is hereby reached. | 05-28-2009 |
20090173308 | HEAT ENGINE COMPRISING BALANCE SHAFTS WHICH CAN BE LOCKED BY A PIN - The invention relates to a heat engine ( | 07-09-2009 |
20090188463 | DISK PENDULUM VIBRATION DAMPER - An apparatus for damping torsional vibration in a shaft, having a plurality of retainer pockets spaced from each other in the direction of the shaft's axis of rotation and connected for contemporaneous rotation with the shaft, and a plurality of disks each disposed within one of the retainer pockets, each retainer pocket having a circular track wall, each disk being free to shift perpendicular to the shaft's axis of rotation to engage and move along the circular track wall in response to the vibration, wherein each circular retainer pocket has a center that is at a predetermined radial offset distance relative to the shaft's axis of rotation and the respective radial offsets are angularly spaced from each other about the shaft's axis of rotation. | 07-30-2009 |
20090205602 | Compensation shaft of a multi-cylinder engine - A compensation shaft for a multi-cylinder engine at least two bearing pegs and at least four unbalanced weight sections, two of the at least four unbalanced weight sections being arranged respectively, around each of the at least two bearing pegs, so that at least two units are formed, these at least two units being connected to each other by a connecting part, wherein two of the unbalanced weight sections are arranged asymmetrically around each of the two bearing pegs, and the connecting part is configured as a flexurally rigid and torsion-proof component. | 08-20-2009 |
20090205603 | Compensation shaft of an internal combustion engine - The invention concerns a compensation shaft for a multi-cylinder engine comprising at least three bearing pegs ( | 08-20-2009 |
20090211550 | ENGINE WITH A BALANCER MECHANISM - There are provided a crank mechanism, and a balancer mechanism that inhibits vibrations caused by the crank mechanism, and an instantaneous center of rotation of an engine is arranged in the neighborhood of a predetermined target position by adjusting an acceleration caused by a translational force generated by a primary inertial force of the crank mechanism and an inertial force of the balancer mechanism and an acceleration caused by a couple of forces generated by the primary inertial force of the crank mechanism and the inertial force of the balancer mechanism. | 08-27-2009 |
20090211551 | CRANKSHAFT MECHANISM FOR ENGINE - A crankshaft mechanism for an engine wherein a crankshaft can be disposed close to the piston side while securing a moment of inertia. In the crankshaft mechanism for the engine including the piston, the crankshaft is provided with a crank pin and counterweight parts, and a connecting rod connecting the piston and the crank pin of the crankshaft to each other, the inner side of a circumferential end, on the opposite side of the crank pin, of each of the counterweight parts is cut out along a curve at equidistance R from the center Q of the crank pin, to obtain such a shape so as to avoid a projected part, projected in the direction of the piston, at the lower end of a small end part of the connecting rod when the piston reaches the bottom dead center. | 08-27-2009 |
20090255503 | ENGINE AND VEHICLE EQUIPPED WITH THE SAME | 10-15-2009 |
20090272358 | METHOD FOR INSTALLING AN ASSEMBLY - The invention relates to a method for the installation of an assembly, in particular of a balance shaft unit for the compensation of mass or torque for internal combustion engines in motor vehicles. The assembly includes a housing part having at least one bearing section, at least one rotating component and at least one rolling element bearing for the axially fixed journaling of the rotating component in the bearing section of the housing part. The bearing section is closed in the peripheral direction and is made in one piece. The rolling element bearing has a first ring section and a second ring section, with the first ring section being associated with the rotating component and the second ring section being associated with the bearing section of the housing part. The rolling element bearing is axially fixedly installed at the rotating component or in the bearing section of the housing part in a first installation step. The rotating component is cooled and/or the housing part is heated in a second installation step. The rotating component is introduced into the bearing section of the housing part and is held there in a third installation step until a temperature compensation has taken place between the rotating component and the housing part such that a shrink-fit connection is established between the rotating component and the first ring section or between the second ring section and the bearing section of the housing part. | 11-05-2009 |
20090277414 | Balancing Assembly of an Engine - A balancing assembly of an engine may include a crankshaft in which crank pins each connected to a connecting rod, are disposed at both ends thereof and that is equipped with a counterweight opposite to and corresponding to each crank pin, a balance shaft that is disposed at a distance from the crankshaft and that rotates by the crankshaft, and a balance weight that is eccentrically formed with a balance shaft and that absorbs vibration. | 11-12-2009 |
20090308343 | Balancing Shaft - The invention relates to a balancing shaft for a multi-cylinder engine having at least one unbalanced weight portion ( | 12-17-2009 |
20090308344 | SHAFT | 12-17-2009 |
20100000490 | MASS BALANCE UNIT - A mass balance unit having an integrated secondary unit for an internal combustion engine of a motor vehicle has a mass balance housing in which at least one mass balance shaft is rotatably journaled and has a unit housing in which at least one drive shaft of the secondary unit is rotatably journaled. The mass balance housing is made in one piece such that the mass balance housing has at least one bearing section which surrounds a bearing opening peripherally in one piece in which the mass balance shaft is rotatably journaled. The unit housing is also made in one piece with at least one base section, with a wall section and with a bearing section such that the bearing section of the unit housing surrounds a bearing opening peripherally in one piece in which the drive shaft is rotatably journaled. The drive shaft is operably connected to the balance shaft drivewise. The base section of the unit housing is releasably fastened to a lower side of the mass balance housing. The wall section of the unit housing is arranged at an end face of the mass balance housing. | 01-07-2010 |
20100043739 | Balance weight system of crankshaft - A balance weight system of a crankshaft includes a first balance weight in which a mass center thereof ranges from approximately +78 to approximately +82 degrees based on the horizontal line, a ninth balance weight in which a mass center thereof ranges from approximately −82 to approximately −78 degrees, a second balance weight in which a mass center thereof ranges from approximately +86.5 to approximately +89 degrees, a eighth balance weight in which a mass center thereof ranges from approximately −89 to approximately −86.5 degrees, and at least one balance weight group of which size of rotational inertia moment thereof ranges from approximately 13 to approximately 17% compared with the first or ninth balance weight, wherein rotational inertia moment size of the second and eighth balance weights ranges from approximately 15 to approximately 25% compared with the first and ninth balance weights. | 02-25-2010 |
20100059011 | Oil sensor placement structure in engine - In an engine, an oil level sensor ( | 03-11-2010 |
20100126457 | METHOD FOR THE PRODUCTION OF A DROP-FORGED BALANCING SHAFT - The invention relates to a method for the production of a drop-forged balancing shaft for a mass balancing gear of an internal combustion engine. The balancing shaft has an unbalanced plane formed by the rotational axis thereof and an eccentric mass center of gravity, and at least one bearing journal, the outer lateral surface of which serves as a track for a rolling bearing supporting the balancing shaft in the internal combustion engine. To this end, the balancing shaft is to be forged in a forging die having a parting plane extending in the direction of the rotational axis and rotated in relation to the unbalanced plane. | 05-27-2010 |
20100126458 | CRANKSHAFT FOR AUTOMOBILE ENGINE - An automobile engine crankshaft that affords further weight reduction of an arm formed integrally with a balancer. The automobile engine crankshaft of the present invention constitutes a structure in which a hollow shaft-shaped journal ( | 05-27-2010 |
20100132652 | BALANCING SHAFT - The invention relates to a balancing shaft for a single-cylinder or multi-cylinder engine having at least one unbalanced weight portion ( | 06-03-2010 |
20100132653 | Balance Shaft Mounting System - A balance shaft includes a housing that is disposed under an engine and a first hole is formed thereto, a balance shaft that is disposed to the housing and a second hole is formed thereto and a mounting pin that is inserted into the first hole through the second hole for mounting the balance shaft. | 06-03-2010 |
20100132654 | BALANCE SHAFT MODULE FOR VEHICLE - The present invention is directed to a balance shaft module for a vehicle. In the balance shaft module of the present invention, an intermediate gear is covered by a baffle cover, thus making it possible to prevent air from mixing into the engine oil when an intermediate gear rotates. Further, since an intermediate gear is supported with increased support force by a gear shaft, to the present invention provides a reduction in noise and frictional wear and improves durability while considerably improving the NVH (Noise Vibration Harshness) performance of a vehicle. | 06-03-2010 |
20100139605 | OIL DISCHARGING STRUCTURE FOR BALANCE SHAFT MODULE - The present invention features, generally, an oil discharging structure of a balance shaft module which can smoothly discharge oil pumped by a balance shaft outside of the balance shaft module by forming an oil guide surface in a ladder frame that is installed in an upper part of the balance shaft module. The oil discharging structure of the present invention preferably includes a balance shaft housing that is rotatably supported with a balance shaft inserted therein; oil discharge holes formed in the balance shaft housing so that oil in the balance shaft housing is discharged to the outside by the balance shaft; and an oil guiding means that is provided in a ladder frame mounted on an upper part of the balance shaft housing in order to induce the oil discharged through the oil discharge holes to the outside of the balance shaft housing. | 06-10-2010 |
20100139606 | BAFFLE PLATE - A baffle plate includes a discharge portion that discharges lubricating oil that has dropped onto the baffle plate, to an oil pan. The discharge portion extends to be inclined in a direction in which cylinders are arranged, with respect to a rotation central axis of a crankshaft. The discharge portion includes a guide groove in which an upstream portion in a rotational direction of the crankshaft is located under a counter weight, and a downstream portion in the rotational direction of the crankshaft is located under a crank bearing. The discharge portion includes a discharge hole that is formed in the downstream portion of the guide groove in the rotational direction, and that provides communication between the oil pan and an engine block. | 06-10-2010 |
20100147248 | ENGINE BALANCE SHAFT HOUSING AND METHOD OF ASSEMBLING SAME - A balance shaft housing is provided that includes a first housing portion, a second housing portion operatively connected to the first housing portion, with the first housing and the second housing configured to cooperatively define first and second balance shaft chambers. A cover member is secured to the second housing portion and cooperates with the first and second housing portions to define an air flow path outside of the chambers for circulating air to the balance shaft chambers. A method of assembling a balance shaft housing is also provided. | 06-17-2010 |
20100154735 | ENGINE BALANCER - An engine balancer includes a pair of balancer shafts and a balancer housing for housing the balancer shafts, and is placed in an oil pan at the bottom of an engine. The balancer housing includes a pair of front and rear bearing walls respectively supporting the balancer shafts with rolling bearings interposed therebetween. The bearing walls of the balancer housing are attached to bearing walls for a crankshaft. The housing body has an aperture at the top thereof. The aperture of the housing body is covered with a plate-shaped cover member thinner than a member forming the housing body. | 06-24-2010 |
20100170467 | BALANCER OF ENGINE, ENGINE, AND OUTBOARD MOTOR - A balancer of an engine includes a rod and a balancer piston. A first end portion of the rod includes a joining portion which is arranged to be joined to a crankshaft of the engine at a position that is eccentric relative to a rotation axis of the crankshaft. A second end portion of the rod is arranged to reciprocate inside a cylinder according to a rotation of the crankshaft. The balancer piston is fixed to the second end portion of the rod. The balancer piston is arranged to reciprocate inside the cylinder, while rocking between a contact state in which the balancer piston is in contact with an inner wall surface of the cylinder and a non-contact state in which the balancer piston is separated from the inner wall surface. The balancer piston includes a cylindrical outer peripheral portion that is curved so as to swell toward the inner wall surface. The outer peripheral portion is arranged such that lines of intersection with planes perpendicular or substantially perpendicular to a central axis of the balancer piston define circles. The outer peripheral portion includes a contact start portion which is arranged to come into contact first with the inner wall surface when the balancer piston switches from the non-contact state to the contact state. A distance from a center of a maximum outer diameter circle with the largest radius among the circles to the contact start portion is larger than the radius of the maximum outer diameter circle. | 07-08-2010 |
20100186706 | INTERNAL COMBUSTION ENGINE - An internal combustion engine can comprise a crankcase, and a crankshaft rotatably supported in the crankcase. The crankshaft includes a drive sprocket attached thereto. A cam chain engages the drive sprocket, and a cam chain chamber houses at least a part of the drive sprocket and cam chain therein. The cam chain chamber is configured to pool oil in a lower portion thereof. A balancer is coupled to the crankshaft and is configured to be rotated by rotational power transmitted from the crankshaft. The balancer is also disposed within the cam chain chamber, and is configured to splash oil pooled in the cam chain chamber during the rotation thereof. The engine also comprises a wall portion disposed in the cam chain chamber. The wall portion is configured to cover an upper portion of the balancer, and is disposed adjacent to a periphery of the balancer. | 07-29-2010 |
20100192894 | BALANCING SHAFT - The invention relates to a balancing shaft for a multi-cylinder engine having at least one unbalanced weight portion ( | 08-05-2010 |
20100199940 | MASS BALANCING MECHANISM OF AN INTERNAL COMBUSTION ENGINE - A mass balancing mechanism for balancing mass forces and/or mass torques of an internal combustion engine, said mechanism comprising a balancing shaft comprising an axis of rotation, a mass center of gravity spaced from said axis of rotation and further comprising at least one bearing peg on which said balancing shaft is mounted for rotation in a mounting location of the internal combustion engine, the bearing peg includes two axially spaced cylindrical bearing peg sections that define a recess which extends substantially or entirely outside of the axis of rotation relative to the mass center of gravity. | 08-12-2010 |
20100326390 | Half cycle eccentric crank-shafted engine - An internal combustion engine having a piston reciprocating in a cylinder between TDC and BDC positions to influence a drive shaft. The drive shaft is associated with an expandable piston rod extension which in turn attaches to a piston rod to connect the piston with the drive shaft. The piston rod extension's length may increase and decrease in accordance with the angular position of the drive shaft. The increasing and decreasing length is governed by a guide pin which travels within a channel formed by a portion of the engine block. Increasing the length of the piston rod extension during the power phase of the engine increases the available torque of the engine without any alteration of the displacement. The assembly may also include a counterweight, which itself may travel along an eccentric path generally equal and opposite to the eccentric path along which the piston rod extension guide travels. | 12-30-2010 |
20110011363 | INTERNAL COMBUSTION ENGINE WITH DYNAMIC BALANCING SYSTEM - An internal combustion engine having a crankshaft and first and second balance shafts which are gear driven from one to the other, as a unilateral tensioning system applied to a flexible drive extending between the engine's crankshaft and a first one of the balance shafts, with the unilateral tensioning system being applied to the tension side alone of the flexible and inextensible drive element. | 01-20-2011 |
20110011364 | ENGINE BALANCER DEVICE - An engine balancer device is provided that can prevent an increase in the number of component parts and the enlargement of an engine. | 01-20-2011 |
20110023809 | UNBALANCED SHAFT - An unbalanced shaft ( | 02-03-2011 |
20110030643 | MASS BALANCING MECHANISM - A mass balancing mechanism of an internal combustion engine, in which the mechanism includes a compensation shaft ( | 02-10-2011 |
20110067666 | ENGINE BALANCER SYSTEM - An engine balancer system is provided in which a balancer housing ( | 03-24-2011 |
20110073060 | ENGINE BALANCE MASSES AND DRIVES - The present application relates to a drive and balance mass. In one example, an engine includes, a camshaft, a balance shaft disposed within an interior of the camshaft, and a first gear, intermediate the balance shaft and the camshaft and driving the balance shaft to rotate about a first axis substantially parallel to a crankshaft of the engine in a direction opposite of the crankshaft. In another example, a balance mass and drive for an engine includes, a planetary gear set including a sun gear, a ring gear and a plurality of pinions mounted on a carrier, an input coupled to an input gear of the planetary gear set, a balance mass coupled to an output gear of the planetary gear set, the output gear configured to drive the balance mass to rotate about a first axis substantially parallel to the crankshaft in a direction opposite of the crankshaft. | 03-31-2011 |
20110083631 | METHOD AND DEVICE FOR REDUCING ROTATIONAL NON-UNIFORMITIES OF THE CRANKSHAFT OF AN INTERNAL COMBUSTION PISTON ENGINE - In a method for reducing rotational non-uniformities of the crankshaft of a piston internal combustion engine, a movable balancing mass component is coupled to the crankshaft in such a way that the kinetic energy of the mass component increases in phases in which the angular speed of the crankshaft would increase if said crankshaft were not coupled to the balancing mass part, and decreases in phases in which the angular speed of the crankshaft would decrease if said crankshaft were not coupled to the balancing mass component. | 04-14-2011 |
20110083632 | MASS BALANCING MECHANISM AND ASSEMBLY METHOD - A mass balancing mechanism and a method of assembly of the same is provided. The mass balancing mechanism serves to compensate mass forces and/or mass moments of inertia of an internal combustion engine and includes two compensation shafts ( | 04-14-2011 |
20110094469 | METHOD AND APPARATUS FOR SECURING A BALANCER SHAFT MODULE - A method for securing a balancer shaft module to an engine is provided, the method including the steps of passing a mounting feature into at least two mounting apertures of the balancer shaft module; simultaneously rotating two of the mounting features within the mounting aperture, wherein the simultaneous rotation of the two mounting features laterally moves the balancer shaft module with respect to the engine; and securing the balancer shaft module to the engine. In addition, a mounting feature for securing a balancer shaft module to an engine is provided, the mounting feature having: a top portion; a mounting cylinder secured to the top portion, the mounting cylinder being centrally located on the top portion; a securement opening passing through the top portion and the mounting cylinder; and wherein the mounting cylinder has a non-uniform outer wall such that a center of the securement opening is offset from a center of the top portion such that rotation of the top portion rotates the securement opening about the center of top portion. | 04-28-2011 |
20110120407 | BALANCE SHAFT MODULE OF ENGINE - A balance shaft module of an engine may include a balance weight shaped eccentrically in a radial direction from the axial center of a balance shaft, and a balance cover combined with the balance weight and defining a circumferentially-uniform outer surface with the balance weight with respect to the axial center of the balance shaft. | 05-26-2011 |
20110155089 | MASS BALANCING DEVICE FOR A RECIPROCATING PISTON INTERNAL COMBUSTION ENGINE - A mass balancing device ( | 06-30-2011 |
20110209680 | INTERNAL COMBUSTION ENGINE - In an internal combustion engine having a pair of balancer shafts ( | 09-01-2011 |
20110247581 | GEAR AND BALANCE SHAFT FOR A PISTON ENGINE - Balance shaft for a piston engine comprises a bearing journal, on which the balance shaft is supported, a gear section, on which a gear is connected in a rotation-locked manner thereto via a press fit or another shaft-hub-connection, and an unbalanced section having an integrally connected unbalanced mass or an unbalanced mass fastened on this unbalanced section using machine elements or via another shaft-hub connection. The balance shaft can alternately comprise steel or cast iron material in the case of a friction mounting and its bearing journals can alternately be implemented as hardened or also unhardened. If the balance shaft is mounted in roller bearings and if the roller bodies have direct contact with the bearing surface, it is implemented in a suitable steel and the bearing journals are hardened. The gear comprises nodular cast iron and is not hardened. | 10-13-2011 |
20110253091 | ENGINE BALANCER SYSTEM - An engine balancer system is provided in which a balancer housing ( | 10-20-2011 |
20110277720 | COMPACT SECOND ORDER BALANCE SHAFT ARRANGEMENT WITH LOW INERTIA DRIVEN SHAFT - A balancer assembly for an engine includes a first balance shaft and a second balance shaft parallel with and laterally spaced from the first balance shaft. The first balance shaft includes a first counterweight portion and a second counterweight portion axially spaced from each other, with each defining a first radius. The second balance shaft includes a central counterweight defining a second radius. The central counterweight is axially disposed between the first counterweight portion and the second counterweight portion to allow a radial overlap with the first counterweight portion and the second counterweight portion, with the first radius being greater than the second radius. | 11-17-2011 |
20110308492 | BALANCER DEVICE OF ENGINE - An oil pump unit comprises a pump shaft and a pump housing which stores the pump shaft. A balancer unit comprises a pair of balancer shafts and a balancer housing which stores the balancer shafts. The pump housing and the balancer housing are coupled to each other at least in the vicinity of a periphery of the pump shaft, and at a coupling portion in the vicinity of the periphery of a power transmission shaft is formed a connection groove which connects the inside to the inside of the coupling portion. Accordingly, it can be retrained that the reliability of journal portions of the balancer shaft of the balancer unit and the like is deteriorated by dusts and the like contained in high-pressure oil from the oil pump unit in a balancer device of an engine. | 12-22-2011 |
20110315110 | ENGINE FOR A VEHICLE - An engine for a vehicle can include an oil pan coupled to a lower portion of a crankcase, and a partition wall configured to partition a crank chamber in the crankcase and the oil pan. The partition wall can be disposed on the crankcase, and can include openings configured to return oil from a crank chamber side to an oil pan side. Bridges are configured to suppress back flow of the oil from the oil pan side to the crank chamber side. The bridges can be fixedly disposed below the openings so as to cover at least part of the openings from below. | 12-29-2011 |
20120037109 | MASS BALANCING MECHANISM OF AN INTERNAL COMBUSTION ENGINE - A mass balancing mechanism is provided for balancing mass forces and/or mass torques of an internal combustion engine. The mass balancing mechanism includes an unbalanced shaft ( | 02-16-2012 |
20120037110 | SPIN BALANCED CRANK ASSEMBLY - A spin balanced crank assembly for two-stroke and four-stroke engines, such as those used in snowmobiles and ATVs, is provided. The crank assembly may achieve an overall two-plane balance engine by adding two additional masses to opposing sides of the crank assembly. The additional masses are each unbalanced to a desired amount and angle in order to offset unbalance in the engine and obtain a balanced assembly. The amount of weight to be added or subtracted may be attached to the masses may be determined by the size and engine from which the crank assembly is a part of because the angle of unbalance of the crank assembly is know beforehand. Additionally, methods for spin balancing two-stroke and four-stroke engines are provided, wherein the method comprises balancing the engine without disassembling the crank. | 02-16-2012 |
20120055437 | ENGINE WITH INCLINED CYLINDER - An engine with an inclined cylinder, including a crankshaft horizontally-disposed, and two balancer shafts arranged in parallel to the crankshaft, wherein a drive gear for driving balancer is provided in the crankshaft, driven gears respectively meshed with the drive gear are provided in the balancer shafts, the two balancer shafts are divided into areas on the both sides of a center line of the cylinder and into upper and lower regions relative to an axis of the crankshaft, and axes of the balancer shafts are arranged so as to be placed within a range of a diameter of the drive gear. | 03-08-2012 |
20120055438 | BALANCER SHAFT OF ENGINE - A balancer shaft of an engine includes a pair of journal portions, a first stage balance weight and a second stage balance weight, wherein the first stage balance weight formed between the journal portions and eccentrically arranged to an axis, the second stage balance weight formed on a center part of the first stage balance weight in the axis direction and projects outward from the first stage balance weight in the radial direction, and the balancer shaft has a recess portion on the opposite side of the eccentricity direction. | 03-08-2012 |
20120111298 | Balancer Integrated with Crankcase - A balancer integrated with a crankcase of an internal combustion engine, including balance shafts that are driven and rotated by a rotational force transmitted from a crankshaft of the internal combustion engine to the balance shafts through an endless transmission member to reduce second order vibration of the internal combustion engine, a tensioner that applies tension to the endless transmission member by pressing an outer surface of the endless transmission member using a hydraulic pressure, a tensioner mounting portion to which the tensioner is mounted, the tensioner mounting portion being integrally formed with the crankcase, and an oil supply portion projectingly disposed along an outer surface of the tensioner mounting portion and integrally formed with the tensioner mounting portion, the oil supply portion supplying the hydraulic pressure to the tensioner through the tensioner mounting portion. | 05-10-2012 |
20120125281 | COUNTERSHAFT - The invention relates to a countershaft for a single or multiple cylinder motor having at least one unbalanced weight section ( | 05-24-2012 |
20120145110 | ENGINE HAVING VARIATION VOLUME CRANK CASE - An engine having a crank case of a variable volume may include a crankshaft that may be disposed in a crank case and may be connected to a piston through a connecting rod, which reciprocate in a cylinder, a balance shaft that may be disposed in the crank case and may be operated by the crankshaft, a chamber that may be extended from the crank case, and a balance weight that may be formed on the balance shaft and selectively opens or closes a fluid communication between the chamber and the crank case according to a position of the piston. | 06-14-2012 |
20120199094 | MULTI-CYLINDER IN-LINE INTERNAL COMBUSTION ENGINE FOR A MOTOR VEHICLE AND METHOD FOR OPERATING SAME - The present disclosure relates to a multi-cylinder in-line internal combustion engine for a motor vehicle, comprising a crankshaft which rotates about a crankshaft axis during operation of the internal combustion engine, a plurality of crank throws which succeed one another in an axial direction, each of which crank throws is associated with a respective cylinder in the internal combustion engine, and a compensating arrangement for at least partially compensating the inertial forces generated on the crankshaft by revolving masses. The multi-cylinder in-line internal combustion engine has a device for varying the position of at least one of the compensating masses relative to the crankshaft as a function of engine speed. The present disclosure further relates to a method for operating such a multi-cylinder in-line internal combustion engine. | 08-09-2012 |
20120255514 | ENGINE BALANCE MASSES AND DRIVES - The present application relates to a drive and balance mass. In one example, an engine includes, a camshaft, a balance shaft disposed within an interior of the camshaft, and a first gear, intermediate the balance shaft and the camshaft and driving the balance shaft to rotate about a first axis substantially parallel to a crankshaft of the engine in a direction opposite of the crankshaft. In another example, a balance mass and drive for an engine includes, a planetary gear set including a sun gear, a ring gear and a plurality of pinions mounted on a carrier, an input coupled to an input gear of the planetary gear set, a balance mass coupled to an output gear of the planetary gear set, the output gear configured to drive the balance mass to rotate about a first axis substantially parallel to the crankshaft in a direction opposite of the crankshaft. | 10-11-2012 |
20120260880 | INTERNAL COMBUSTION ENGINE HAVING A CYLINDER HEAD AND A CYLINDER BLOCK - An internal combustion engine ( | 10-18-2012 |
20120285412 | IN-LINE INTERNAL COMBUSTION ENGINE HAVING A MULTI-JOINT CRANK DRIVE AND A SINGLE BALANCE SHAFT FOR DAMPING SECOND-ORDER INERTIA FORCES - An internal combustion engine has a multi-joint crank drive wherein the multi-joint crank driver includes a plurality of coupling members which are rotatably supported on crank pins of a crank shaft and a plurality of hinged connecting rods which are rotatably supported on crank pins of an eccentric shaft wherein each of the coupling members is pivotally connected to a piston connecting rod of a piston of the internal combustion engine and one of the articulation connecting rods. In order to enable to largely or completely compensate inertia forces, it is proposed according to the invention to equip the internal combustion engine with a single balance which serves for neutralizing second order inertia forces. | 11-15-2012 |
20120291742 | COUNTER ROTATING MASS SYSTEM CONFIGURED TO BE APPLIED TO AN INLINE-FOUR INTERNAL COMBUSTION ENGINE TO BALANCE THE VIBRATIONS PRODUCED BY SAID ENGINE, AND INLINE-FOUR ENGINE COMPRISING SAID SYSTEM - The present invention relates to a counter rotating mass system for balancing the vibrations produced by a vehicle engine, comprising a central support ( | 11-22-2012 |
20130000589 | MULTICYLINDER IN-LINE INTERNAL COMBUSTION ENGINE FOR A MOTOR VEHICLE AND METHOD FOR OPERATING THE ENGINE - An internal combustion engine in a vehicle is described herein. The internal combustion engine may include two outer pistons, each of the pistons arranged in a separate cylinder and positioned in an in-line configuration in which a straight line extends through each of the axes of the pistons, a crankshaft including a plurality of crank throws, each crank throw coupled to a separate piston, and a flywheel coupled to a first end of the crankshaft. The engine may further include a belt pulley coupled to a second end of the crankshaft and a balancing arrangement including a first balancing mass coupled to a belt pulley and a second balancing mass coupled to a flywheel, the relative separation between the first balancing mass and the second balancing mass measured on a plane perpendicular to a rotational axis of the crankshaft is less than 170°. | 01-03-2013 |
20130025558 | INTERNAL COMBUSTION ENGINE WITH BALANCER - In an internal combustion engine with a balancer including a crankcase having a pair of wall portions, a crankshaft supported for rotation on the wall portions and having a balancer driving gear wheel provided thereon, and a balancer shaft supported for rotation by the wall portions and having a balancer driven gear wheel provided thereon, both gear wheels are disposed between the wall portions. A positioning mark including a set of marks provided on side faces in the same direction of the gear wheels is disposed near to pitch circles of both gear wheels. At a position opposing to both side faces of the one wall portion on the side opposing to the positioning mark on the pitch circles of both gear wheels, a through-hole extending through the one side wall is provided to permit the positioning mark to be visually observed through the through-hole. | 01-31-2013 |
20130032116 | RECIPROCATING-PISTON INTERNAL COMBUSTION ENGINE WITH MASS BALANCING DEVICE - The invention relates to a reciprocating-piston internal combustion engine ( | 02-07-2013 |
20130036995 | Method for Balancing the Mass Forces of an Internal Combustion Engine and Internal Combustion Engine for Carrying Out Such a Method - Embodiments for balancing an engine are provided. In one example, a method for balancing mass forces of a crank drive of an internal combustion engine having at least one cylinder comprises providing at least one balancing unit which has at least one balancing weight which serves as an unbalance and which rotates about a rotational axis when the balancing unit is operational, the at least one balancing unit being embodied as a switchable balancing unit, and switching on the at least one balancing unit as a function of at least one operating parameter of the internal combustion engine. | 02-14-2013 |
20130036996 | Internal Combustion Engine with Mass Balancing and Method for Operating Such an Internal Combustion Engine - Embodiments for mass balancing an engine are provided. In one example, an internal combustion engine having at least one cylinder which is associated with a crank drive comprises at least one mechanically driven balancing unit for balancing the mass forces, the balancing unit including at least one balancing weight which serves as an unbalance by initially rotating a first mass about a rotational axis relative to a second mass when the balancing unit is operational, and an interrupter unit to disconnect the at least one balancing unit from the mechanical drive in a switched off state and connect it to the mechanical drive in a switched on state. | 02-14-2013 |
20130068187 | ENCAPSULATED BALANCE SHAFT AND METHOD - A shaft assembly includes a shaft, a spacer and a cover. The body of the shaft includes a sealing portion, a balancing portion and a hollow portion which may collectively define a generally cylindrical space. The spacer substantially encloses the hollow portion of the body. The cover encapsulates the shaft body and the spacer to provide a substantially continuous cylindrical surface in sealing engagement with the sealing portion. The shaft assembly may be rotatably installed in an engine such that the balancing portion may be partially submerged in an oil bath in the engine and such that the substantially continuous cylindrical surface of the cover minimizes turbulence and aeration of the oil bath when the shaft assembly is rotated. The shaft may be configured for rotation in synchrony with a crankshaft. A method for encapsulating the shaft includes forming a continuous cylindrical surface in sealing engagement with the shaft body. | 03-21-2013 |
20130098327 | BALANCE SHAFT ASSEMBLY FOR VEHICLE - A balance shaft assembly for a vehicle, which includes a balance shaft carrier disposed under a cylinder block and, includes an oil pan, an upper end of the oil pan being coupled to a bottom of the cylinder block, may include a balance shaft protruding rearward from the balance shaft carrier and rotatably supported by the balance shaft carrier, a balance weight formed on an outer circumferential surface of the balance shaft, and a balance weight receiving portion formed at the oil pan and coupled to the balance shaft carrier to seal the balance weight therebetween. | 04-25-2013 |
20130098328 | Balancing an Opposed-Piston, Opposed-Cylinder Engine - An opposed-piston, opposed-cylinder engine in which the intake and exhaust pistons are symmetrically arranged has a small inertial force imbalance in the direction of reciprocation of the pistons. A center of gravity of the crankshaft can be displaced from the axis of rotation to at least partially overcome this imbalance. Such counterweighting of the crankshaft cancels a portion of the inertial balance due to the pistons but introduces an inertial imbalance in an orthogonal direction with respect to the piston-induced imbalance. By providing additional counterweights on pulleys rotating at the same speed, but the opposite direction, as the crankshaft, the imbalance can be substantially eliminated to yield substantially a perfectly-balanced engine. | 04-25-2013 |
20130104835 | BALANCE SHAFT MODULE OF V6 ENGINE | 05-02-2013 |
20130118436 | BALANCE SHAFT MODULE OF ENGINE - A balance shaft module of an engine, may include a crank sprocket driving gear for receiving a power of a crankshaft of the engine, a crank sprocket driven gear engaged with the crank sprocket driving gear and receiving a power of the crank sprocket driving gear, a first balance shaft arranged coaxially with the crank sprocket driven gear and having a first driving gear to receive a power from the crank sprocket driven gear, and a second balance shaft receiving a power through a second driven gear engaged with the first driving gear. | 05-16-2013 |
20130133607 | STRUCTURE OF BALANCE SHAFT - A balance shaft structure for offsetting a secondary unbalance force due to a crankshaft of an engine may include a plurality of balance shafts rotating with the crankshaft, and a balance weight formed on a circumferential surface of each corresponding balance shaft and offsetting the secondary unbalance force, wherein the balance shafts may be disposed at the left and right of the crankshaft respectively and symmetric with respect to a longitudinal axis of the crankshaft, and disposed to be biased at a front part or a rear part of the engine, such that the center of weight may be offset by the center of weight of the engine, and a moment balance weight formed to each corresponding balance shaft and offsetting a pitch moment of the crankshaft generated by offsetting. | 05-30-2013 |
20130139778 | BALANCING DEVICE FOR ENGINE - A balancing device for an engine includes a crankshaft for converting reciprocal motion of a piston of the engine to a rotary motion, at least one electromagnetic force generator mounted apart from the crankshaft by a predetermined distance and generating an electromagnetic force, and a control portion controlling the electromagnetic force generator to generate an electromagnetic force offsetting an unbalanced force occurring according to a rotational position of the crankshaft. | 06-06-2013 |
20130139779 | BALANCING SHAFT - A balancing shaft may have at least one unbalance portion and at least one bearing point, wherein the at least one unbalance portion is associated with the at least one bearing point. The balancing shaft on the bearing point may define a transverse opening which separates a first part bearing surface from a second part bearing surface. | 06-06-2013 |
20130146014 | Two-Cylinder Engine - A two-cylinder engine is configured to reduce vibration. The two-cylinder engine includes a piston, a piston pin, a crankshaft of which a rotation center is positioned at a first predetermined distance from an imaginary center line of a cylinder, and a balance shaft of which a rotation center is positioned at a predetermined angle from an imaginary line perpendicular to the imaginary center line of the cylinder around the rotation center of the crankshaft for abutting onto a vehicle mounting position so as to reduce vibration. | 06-13-2013 |
20130146015 | BALANCER DEVICE FOR AN INTERNAL COMBUSTION ENGINE - In a balancer device ( | 06-13-2013 |
20130167792 | SELF-LUBRICATING BALANCE SHAFT WITH FLOW CONTROL - A mass compensating shaft drive for compensating forces or moments of inertia of a reciprocating piston internal combustion engine is provided having a balance shaft supported by at least one journal in a housing of the internal combustion engine. A rolling bearing is located between each of the at least one journals and the housing. The balance shaft includes an oil gallery that is adapted to be connected to a source of pressurized lubricating oil. A check valve is located between the oil gallery and each of the at least one bearing journals, with the check valve being arranged to open upon at least one of a lubricating oil pressure or a centrifugal force generated through rotation of the balance shaft exceeding a predetermined closing force for the check valve. | 07-04-2013 |
20130167793 | METHOD TO BALANCE MASS MOMENTS OF A DRIVE UNIT AND DRIVE UNIT FOR PERFORMANCE OF SUCH A METHOD - A method to balance a crank drive of an internal combustion engine comprising: using a balancer unit comprising a first balance weight and a second balance weight serving as counterbalance; rotating the first and second balance weight at an engine rotation speed when a crankshaft rotates at the engine rotation speed; rotating the first balance weight in a same direction as the crankshaft; rotating the second balance weight in an opposite direction to the crankshaft; arranging the first balance weight and the second balance weight such that a resulting balancing moment about a velocity pole of a 1st order of a rigid body rotation of a drive unit at least partially balances a rotary movement about a velocity pole provoked by a resulting mass moment of the 1st order, an external effect of the resulting mass moment of the 1st order being at least partially balanced. | 07-04-2013 |
20140000547 | "V" CONFIGURATION ENGINE CYLINDERS AND CRANK WITH ANTIPHASE FIRST ORDER RECIPROCATING INERTIAL FORCES | 01-02-2014 |
20140041617 | ENGINE CRANKSHAFT - A crankshaft is provided. The crankshaft includes an unsupported axially-aligned shaft section interposing an outer main bearing journal and an inner main bearing journal, the unsupported axially-aligned shaft section having a central axis aligned with a rotational axis of the crankshaft, and a pendulum absorber coupled to the unsupported axially-aligned shaft section, the pendulum absorber including a blade extending from the unsupported axially-aligned shaft section and a pendulous counterweight coupled to the blade. | 02-13-2014 |
20140060474 | Engine Balancer - An engine balancer including a driving gear, a driving shaft, a driven gear, and a gear pair formed by interlocking the driving gear with the driven gear, wherein the driving gear is engaged with the driven gear, and the engine balancer further includes a fixing member to elastically fix the driving gear onto the driving shaft. | 03-06-2014 |
20140069366 | BALANCER DEVICE FOR AN INTERNAL COMBUSTION ENGINE - A balancer housing ( | 03-13-2014 |
20140109860 | MASS EQUALIZATION GEAR MECHANISM OF AN INTERNAL COMBUSTION ENGINE - A mass equalization gear mechanism of an internal combustion engine is provided, having a gear mechanism housing ( | 04-24-2014 |
20140123928 | BALANCER DEVICE FOR PARALLEL TWIN CYLINDER INTERNAL COMBUSTION ENGINE - A device is provided for reducing first cylinder vibratory force F | 05-08-2014 |
20140123929 | DRIVE SYSTEM FOR A VEHICLE - A drive system for a vehicle has an internal combustion engine and a torsional vibration damping arrangement. The internal combustion engine is switchable between operating modes of different performance. The torsional vibration damping arrangement includes an input region, which can be driven in rotation, and an output region. A first torque transmission path is provided between the input region and output region, and a second torque transmission path is provided parallel thereto. A coupling arrangement superposes the torques transmitted via the torque transmission paths, and a phase shifter arrangement is provided in at least one torque transmission path for generating a phase shift of rotational irregularities transmitted via the one torque transmission path in relation to the rotational irregularities transmitted via the other torque transmission path. | 05-08-2014 |
20140137830 | ANTI-VIBRATION DEVICE FOR VEHICLE - An anti-vibration device for a vehicle has a first torque rod assembly having a first rod with one end fixed to an engine and the other end fixed to a vehicle body, an inertial mass supported on the first rod, and an actuator that reciprocates the inertial mass in an axial direction of the first rod, and a second torque rod assembly having a second rod with one end fixed to the engine and the other end fixed to a sub-frame that is installed on the vehicle body via an elastic member. | 05-22-2014 |
20140190442 | BALANCER DEVICE OF INTERNAL COMBUSTION ENGINE - A balancer device of an internal combustion engine, has a drive gear engaged with an input gear to which a rotation force is transmitted from a crankshaft; a balancer drive shaft to which the rotation force is transmitted from the drive gear and which has a balancer weight; a balancer drive gear rotating integrally with the balancer drive shaft; a balancer driven gear engaged with the balancer drive gear; and a balancer driven shaft rotating integrally with the balancer driven gear and having a balancer weight. At least one of the drive gear, the balancer drive gear and the balancer driven gear is provided, on both axial direction side surfaces thereof, with ring-shaped grooves whose diameters are different from each other. The ring-shaped grooves are formed up to a depth from the surface of the gear at which both the ring-shaped grooves overlap each other in the axial direction. | 07-10-2014 |
20140230771 | NUTATING BALANCER FOR INTERNAL COMBUSTION ENGINE - A nutating balance device for mitigating vibrations of an internal combustion engine having a crankshaft includes a coupler coupled to the engine crankshaft. The device also includes a weight coupled to the coupler. The coupler is configured to move the weight in sync with the crankshaft. The nutating balance device can generate variable torque pulsations or moments corresponding to torque harmonic frequencies of the internal combustion engine. | 08-21-2014 |
20140245985 | INTERNAL COMBUSTION ENGINE WITH COMPENSATION WEIGHT ARRANGED ON THE CRANKSHAFT AND SERVING AS AN IMBALANCE, AND METHOD FOR PRODUCTION OF THE CRANKSHAFT - An internal combustion engine with a cylinder and with a crank drive is described herein. The internal combustion engine includes a crankshaft in which the crankshaft mounted in the crankcase has an associated crankshaft throw for the cylinder. The internal combustion engine further includes a compensation weight serving as a counterbalance for mass compensation arranged on the crankshaft on the side opposite the crankshaft throw, where the compensation weight includes an outward-facing side and a distance from a peripheral surface of the outward-facing side to a longitudinal axis of the crankshaft is not constant along the length of the peripheral surface of the outward-facing side. | 09-04-2014 |
20140261281 | Dry Sump Scavenge Pump System With Balance Shaft Capability For Application To Flat Plane V8 Engines - An internal combustion engine includes a balance shaft assembly having a housing mounted to the cylinder block wherein the housing supports a pair of balance shafts rotatably driven by the crankshaft. The pair of balance shafts rotate in opposite directions and each include a hollow tubular body with an internal eccentric mass. A first of the pair of balance shafts is drivingly connected to a drive sprocket at a first end and can include a first drive gear at a second end that is meshingly engaged with a first driven gear at an end of a second of the pair of balance shafts. A first oil pump is provided at the first end of the pair of balance shaft, and a second oil pump is provided at a second end of the pair of balance shafts. The gears of the oil pumps transfer torque between the pair of balance shafts. | 09-18-2014 |
20140261282 | TORQUE RIPPLE COMPENSATING DEVICE - A torque ripple compensating device for an internal combustion engine is provided. The torque ripple compensating device comprises a first member, a second member, and a third member. The first member is in driving engagement with an output of the internal combustion engine. The second member is in driving engagement with the first member. The third member is in driving engagement with the second member. An angular deviation between the first member and the third member causes a cyclical acceleration of the third member. The cyclical acceleration of the third member applies a torque to the output of the internal combustion engine through the first member. The torque ripple compensating device is able to be passively or dynamically adapted for both an amplitude and a phase of a torque ripple while minimizing an interference with an operation of the internal combustion engine. | 09-18-2014 |
20140366832 | INTERNAL COMBUSTION ENGINE AND CONTROL METHOD THEREFOR - An engine including: a primary balancer driven by a crankshaft via a gear drive device and rotates in a direction reverse to a direction of the crankshaft; an electric motor driven by the primary balancer via a belt drive device to rotate in a direction reverse to the direction of the crankshaft; an auxiliary flywheel provided to a rotary shaft of the electric motor via a clutch. An engine control unit including a first device for increasing and decreasing effective moment of inertia around the crankshaft by engaging or disengaging the clutch in accordance with an operating condition of the engine, and a second device for controlling torque to be transmitted to the gear drive device via the belt drive device by power-driving or regeneratively driving the electric motor in accordance with a crank angular acceleration. | 12-18-2014 |
20150027397 | ROLLING BEARING AND INTERNAL COMBUSTION ENGINE EQUIPPED WITH SUCH A ROLLING BEARING - The invention relates to a rolling bearing provided with at least one row of rolling elements disposed between an inner raceway and an outer raceway. At least one of the raceways is coated with a tungsten sulphide (WS | 01-29-2015 |
20150053165 | Device and Method for Reducing Rotational Imbalances of a Drive Train for a Hybrid Vehicle - A system and a method for reducing a rotational imbalance of a drive train of a hybrid vehicle are provided. The drive train includes an internal-combustion engine, an electric machine, and a crankshaft. A reduction or nullification of the rotational imbalance takes place by actuating the electric machine. The actuation is implemented as an adaptive feed forward control, which provides an actuation signal for the electric machine. The actuation signal represents a desired torque to be generated by the electric machine, so that the electric machine outputs a torque that is at least approximately inverse with respect to the rotational imbalance to the crankshaft for the superimposition of the torque generated by the internal-combustion engine. | 02-26-2015 |
20150075477 | BALANCER DEVICE FOR INTERNAL COMBUSTION ENGINE AND ITS ASSEMBLY METHOD - A balancer device for an internal combustion engine includes upper and lower housings made of aluminum alloy. The upper housing includes a leg part fixed to the engine. The lower housing is coupled to the upper housing by tightening bolts. A pair of balancer shafts are rotatably supported by the upper and lower housings. A positioning pin is disposed at a distal end portion of the leg part for positioning the upper housing with respect to the engine by positional correspondence to a positioning hole of the engine when the tightening bolts are tightened. The leg part is inclined outwardly with respect to a body of the upper housing such that a distal end of the positioning pin is located outside of a proximal end of the leg part with respect to the body of the upper housing when the tightening bolts are loosened. | 03-19-2015 |
20150083068 | INTERNAL COMBUSTION ENGINE - An internal combustion engine includes a crankcase, a case cover for covering a side of the crankcase, a crankshaft and a balancer shaft. A balancer has a balancer driven gear and a balance weight provided on the balancer driven gear and is acted upon and driven by a driving force of the crankshaft to rotate. An oil pump is accommodated in the crankcase and has an oil pump driving shaft disposed in parallel to the crankshaft and the balancer shaft. The oil pump includes a pump driven gear. The balancer has a pump driving gear which has a diameter smaller than that of the balancer driven gear and rotates together with the balancer driven gear. The pump driving gear meshes with the pump driven gear. The oil pump driving shaft is disposed within a range of rotation of the balance weight as viewed in an axial direction thereof. | 03-26-2015 |
20150292595 | INTERNAL COMBUSTION ENGINE - In an engine (internal combustion engine), a crankcase is provided with a fastening area that surrounds the opening and contacts the oil pan, a balance shaft housing is disposed in the crankcase to surround the opening, and four housing side fastening sections are provided to the crankcase to fasten the crankcase and the balance shaft housing. The fastening section of the four housing side fastening sections in a first axial direction side of a balance shaft is disposed on the inside of the fastening area, and the fastening section of the four housing side fastening sections in a second axial direction side of the balance shaft is disposed on the outside of the fastening area. | 10-15-2015 |
20160010518 | DOWEL BOLTS FOR MOUNTING AN OIL PUMP TO AN ENGINE ASSEMBLY | 01-14-2016 |
20160017955 | Single Cylinder Balance System - A balance system for a single cylinder engine is described. The single cylinder engine generates forces, that if left unbalanced, cause significant vibrations or movement to the single cylinder engine and devices driven by the single cylinder engine. The balance shaft includes a primary balance shaft for a first type of forces and at least one secondary balance shaft for a second type of forces. The secondary balance shaft is driven directly by the primary balance shaft. In one example, only one secondary balance shaft may be used, which may leave some forces unbalanced but is more space and cost effective. In another example, two or more secondary balance shafts may be included in a drive chain such that one secondary balance shaft drive the next secondary balance shaft. | 01-21-2016 |
20160017956 | UNBALANCED SHAFT - An unbalanced shaft for compensating inertial forces and/or moments of inertia for a reciprocating internal combustion engine includes at least one shaft section and a bearing journal adjacent to the at least one shaft section and an unbalance mass disposed on the shaft section. The bearing journal is formed from at least two parts including a first solid bearing segment and a second solid bearing segment, and a center of gravity of the shaft section and the bearing journal is eccentric to an axis of rotation of the unbalanced shaft. The first solid bearing segment includes a portion projecting into the second solid bearing segment and the second solid bearing segment include a portion projecting into the first solid bearing segment such that the first and the second solid bearing segment are secured at least axially relative to each other. | 01-21-2016 |
20160032961 | HALF THRUST BEARING AND BEARING DEVICE USING THE SAME - The present invention provides a half thrust bearing in a semicircular ring shape for receiving an axial force of the crankshaft of the internal combustion engine, including thrust reliefs formed adjacent to both circumferential end portions of a slide surface which receives the axial force, so that a wall thickness of the half thrust bearing becomes thinner toward the circumferential end portions, wherein at least the thrust relief on a rear side in a rotational direction of the crankshaft has a thrust relief length which becomes larger toward an outer end portion from an inner end portion in a radial direction of the half thrust bearing. The present invention also provides a bearing device including the above half thrust bearing, a crankshaft, a pair of half bearings supporting a journal portion of the crankshaft, and a bearing housing having a holding hole for holding the pair of half bearings. | 02-04-2016 |
20160040745 | TORSIONAL COMPENSATOR BASED ON MAGNETIC RELUCTANCE - A torsional compensator for an internal combustion engine is provided. The torsional compensator comprises a rotor portion and a stator portion. The rotor portion is in driving engagement with an output of the internal combustion engine. The first rotor portion comprises at least one of first magnetic array and a first ferromagnetic array. The stator portion is disposed about the rotor portion. The stator portion is coupled to at least one of the internal combustion engine, a transmission, and a compensator housing. The stator portion comprises at least one of a second magnetic array and a second ferromagnetic array. In response to rotation of the rotor portion within the stator portion, a magnetic reluctance force is generated. The magnetic reluctance force applies a torque to the output of the internal combustion engine to dampen a torque ripple of the internal combustion engine. | 02-11-2016 |
20160091049 | BALANCER APPARATUS FOR INTERNAL COMBUSTION ENGINE - A gear transmission mechanism is provided between a crankshaft and the balancer shaft. The balancer shaft includes a pair of bearing portions supported for rotation on a crankcase and a gear wheel supporting portion formed in a tapering shape such that a diameter thereof decreases away from one bearing portion. A tubular boss portion is provided integrally on the driven gear wheel and has a tapering attachment hole in which the gear wheel supporting portion is fitted. A fitting recessed portion in which a pin which has an axial line along a radial direction of the balancer shaft and is fitted at a half portion on one end side thereof in a large diameter end portion of the gear wheel supporting portion is fitted at a half portion on the other end side thereof is provided on the boss portion on the large diameter end side of the attachment hole. | 03-31-2016 |
20160123450 | BALANCE SHAFT AND INTERNAL COMBUSTION ENGINE - A balance shaft adapted to be rotated by a crankshaft of an internal combustion engine. The balance shaft is equipped with bearings in order to be mounted in a freely rotatable manner in a frame of the internal combustion engine, and with a cam for interaction with a cam follower roller for a fuel injection pump. At least one of the bearings is a bearing with a double row of rolling elements. | 05-05-2016 |
20160131221 | BALANCER DEVICE FOR INTERNAL COMBUSTION ENGINE - A balancer device includes a housing fixed to an internal combustion engine, a roller bearing disposed in the housing, a balancer shaft rotatably supported in the housing by the roller bearing, a balancer weight integrally mounted on the balancer shaft and rotatably accommodated in an weight accommodation room of the housing, an introduction part that introduces a lubricating oil from the outside to the inside of the weight accommodation room, and a discharge part that provides communication between the inside and the outside of the weight accommodation room and discharges the lubricating oil from the inside of the weight accommodation room, wherein herein the roller bearing is arranged to face the weight accommodation room. | 05-12-2016 |
20160377146 | SHAFT ASSEMBLY FOR AN INTERNAL COMBUSTION ENGINE - A shaft assembly for an internal combustion engine includes at least one bearing journaled shaft rotatably supported in at least one bearing, and at least one bushing constrained in rotation with the shaft. The bushing is provided with a journal surface for a bearing. The shaft is made of a material different from and typically softer than the material of which the bushing is made. | 12-29-2016 |