Class / Patent application number | Description | Number of patent applications / Date published |
123900450 | Lash adjustment | 58 |
20080216784 | Valve Drive Having a Mechanical Valve Play Position and Method for the Mounting Thereof - The valve drive has a cam follower ( | 09-11-2008 |
20080295789 | ROLLER FINGER FOLLOWER FOR VALVE DEACTIVATION - The finger follower has an inner and outer body and a torsional lost motion spring positioned at its lash adjuster end of the outer body The torsional lost motion springs have a short leg that abuts the outer body and a long leg that contacts the inner body. The torsional spring is located above the pivot point of the finger follower so as to provide a low mass moment of inertia and to reduce the weight over the valve stem end of the follower. | 12-04-2008 |
20090000585 | Camshaft Support Structure of an Internal Combustion Engine and Assembly Method Thereof - A lash adjuster support portion is integrally formed with a lower cam carrier. The lower cam carrier is fixed onto a cylinder head into which an intake valve and an exhaust valve have been fitted. After a lash adjuster is set in the lash adjuster support portion, a rocker arm is placed on the intake side and a rocker arm is placed on the exhaust side. Camshafts are then placed on the lower cam carrier such that the rocker arm contacts an intake cam and the rocker arm contacts an exhaust cam. An upper cam carrier is then assembled to the lower cam carrier, thus completing the camshaft support structure. | 01-01-2009 |
20090145389 | ROCKER ARM FOR VARIABLE VALVE LIFT, AND VARIABLE VALVE LIFT APPARATUS HAVING THE SAME - The present invention provides a variable valve lift including a housing, a plurality of swing arms that are rotatably arranged at the housing, and a plurality of latching mechanisms for selectively latching the plurality of swing arms. | 06-11-2009 |
20090199802 | LASH ADJUSTER - The present invention relates to a lash adjuster including a ball retainer having a generally conical chamber for situating a ball near the base of the lash adjuster housing. The chamber has both an external and internal shoulder for engaging a plunger spring and a ball spring, respectively. The chamber may further define at least one aperture near its apex and at least one aperture near its base to facilitate oil flow through the lash adjuster. | 08-13-2009 |
20100050969 | MECHANICAL ADJUSTER - [Problem] To adjust increase/decrease in valve clearance automatically. | 03-04-2010 |
20100126453 | LASH ADJUSTER FOR SWING ARM TYPE VALVE GEAR - The object is to provide a lash adjuster that can be easily and repeatedly mounted on a swing arm type valve gear, having an adjusting screw that can be repeatedly held in a pushed-in state with a general-purpose turning tool such as a wrench. | 05-27-2010 |
20100180847 | VALVE LASH ADJUSTMENT SYSTEM FOR A SPLIT-CYCLE ENGINE - The present invention provides a valve actuation system comprising a valve train for actuating a valve, the valve train including actuating elements and a valve lash, and a valve lash adjustment system for adjusting the valve lash, wherein the valve train and the valve lash adjustment system do not share any common actuating elements. | 07-22-2010 |
20100180848 | VALVE LASH ADJUSTMENT SYSTEM FOR A SPLIT-CYCLE ENGINE - The present invention provides a valve actuation system comprising a valve train for actuating a valve, the valve train including actuating elements and a valve lash, and a valve lash adjustment system for adjusting the valve lash, wherein the valve train and the valve lash adjustment system do not share any common actuating elements. | 07-22-2010 |
20100192889 | ROCKER ARM RETENTION - A reciprocating lever for a valve train assembly is provided, including a receiving portion and at least one retaining feature. The receiving portion is for selectively receiving a member that is actuated by the reciprocating lever. An actuation direction is also included and is defined by an actuation axis, wherein the reciprocating lever selectively actuates the member. The at least one retaining feature is located at the receiving portion of the reciprocating lever. The at least one retaining feature is configured to selectively engage with and limit relative movement of the member with respect to the reciprocating lever along the actuation axis. | 08-05-2010 |
20100236508 | SWITCHABLE CAM FOLLOWER OF A VALVE TRAIN OF AN INTERNAL COMBUSTION ENGINE - Proposed is a switchable cam follower ( | 09-23-2010 |
20100263613 | LASH ADJUSTER - The object is to prevent the adjusting screw from being pushed in while rotating when a load is applied to the adjusting screw that tends to push in the adjusting screw. | 10-21-2010 |
20110017160 | ROCKER ARM UNIT AND METHOD OF ASSEMBLING ROCKER ARM UNIT - A rocker arm unit comprises a lash adjuster having a plunger extending axially and a cylindrical body which houses the plunger so that the plunger is slidable; a rocker arm supported by an upper end of the plunger and swung with the supported position serving as a pivot; and a clip which is fixed to the body so as to extend from the fixed position to engage the rocker arm, thereby restricting drop of the rocker arm out of the lash adjuster. | 01-27-2011 |
20110041791 | ROCKER ARM UNIT - A rocker arm unit constituting a valve gear of an internal combustion engine includes a support member assembled into the cylinder head, a rocker arm supported on a top of the support member so as to be swung with a supported position serving as an approximate fulcrum, and a wire member bridging the support member side and the rocker arm side with each other thereby to connect the support member and the rocker arm together. | 02-24-2011 |
20110061621 | Valve Lash Setting Process - A valve lash setting method for setting a predetermined lash in a valve assembly for internal combustion engines. The method includes generating a torque curve and using a linear regression calculation to define a zero crossing point from which a predetermined final lash position of an adjusting screw can be set and secured. | 03-17-2011 |
20110126787 | SWITCHABLE ROLLER FINGER FOLLOWER - The finger follower employs two independent lost motion arms and a rod which moves longitudinally to lock both arms. The rod is transversely mounted in the follower. In order to avoid premature locking, a clip is employed with tabs that interact with end surfaces of the arms so as to prevent premature movement of the rod from an unlocked position to a locked position. | 06-02-2011 |
20110174254 | METHOD AND DEVICE FOR MEASURING AND ADJUSTING VALVE CLEARANCE - The present invention provides a method and a device for accurately measuring and adjusting a valve clearance value to a desired value in an engine having a rocker-arm-type valve. | 07-21-2011 |
20110197843 | SWITCHABLE ROLLER FINGER FOLLOWER - The finger follower employs two independent lost motion arms and a coupling device that locks both arms. Stops are provided both for the roller axle and for the arm swing. The axle stop and the end stops for the arm swing are positioned on the arm and the outer sidewall of the inner lever. | 08-18-2011 |
20110239968 | SWITCHABLE ROLLER FINGER FOLLOWER ASSEMBLY - A switchable roller finger follower for a valvetrain of an internal combustion engine. The switchable roller finger follower includes an elongated body, a cam follower, a locking pin assembly, lost motion springs and a shuttle pad assembly moving horizontally. The locking pin assembly includes a locking pin and hydraulic fluid supply channel, selectively locking and unlocking the shuttle pad assembly, allowing either a high lift or low lift profile to achieve contact with pre-determined profiles of a multi-lobe camshaft which, in turn, provides low lift or high lift operation of an associated gas exchange valve. | 10-06-2011 |
20130306016 | ROCKER ARM WITH LASH ADJUSTER - The present invention provides a rocker arm with a lash adjuster which includes a rocker arm body portion including a circular fitting hole, a large-diameter hole, and a step portion at a boundary between the fitting hole and the large-diameter hole; a lash adjuster having a snap ring groove formed on an outer circumferential surface of the lash adjuster, and a snap ring fitted to the snap ring groove, wherein the lash adjuster is inserted in the fitting hole, the snap ring increases in diameter, hooks on the step portion, and prevents the lash adjuster from slipping off; and a diameter-reducing member that is assembled in the rocker arm body portion and that reduces the diameter of the snap ring by operation of the diameter-reducing member from an outside of the rocker arm body portion until the snap ring is not engaged with the step portion. | 11-21-2013 |
20130312689 | ROCKER ARM ASSEMBLY AND COMPONENTS THEREFOR - A switching rocker arm having an outer arm having a first end, a second end, a first and second outer side arm having slider pads that ride on a second cam is disclosed. The switching rocker arm also has an inner arm disposed between the first and second outer side arms. The inner arm has a first end, a second end and a bearing disposed between the first and second end adapted to ride along a first cam. The inner arm is pivotably secured adjacent its first end to the outer arm adjacent its first end. At least one arm has an over-travel limiter structure limits pivoting motion of the first arm relative to the second arm. The switching rocker arm also exhibits decreased lash as the bearing wears, and increased lash as the latch and slider pads wear. | 11-28-2013 |
20140041608 | SWITCHING ROCKER ARM - A switching rocker arm assembly can include an outer arm, an inner arm and a latch assembly. The outer arm can have one or more high lift lobe contacting surfaces, where each of the high lift lobe contacting surfaces has an uppermost point that defines an outer arm tangent plane. The inner arm can be pivotably secured to the outer arm and have a low lift lobe contacting surface. The low lift lobe contacting surface can have an uppermost point that defines an inner arm tangent plane that is parallel to the outer arm tangent plane. The inner arm tangent plane can be spaced from the outer arm tangent plane by a minimum distance. The latch assembly can be movable between a first configuration in which the outer arm rotates with the inner arm, and a second configuration in which the outer arm rotates independently from the inner arm. | 02-13-2014 |
20140290609 | VALVE LASH ADJUSTMENT SYSTEM - A valve lash adjustment system for setting a valve to a rocker arm clearance for a valve train associated with a particular combustion cylinder for an engine is disclosed. The valve lash adjustment system includes a frame assembly including an engine head attachment portion and an instrument attachment portion. The engine head attachment portion of the valve lash adjustment system is removably attachable to the engine and the instrument attachment portion is selectively positionable relative to the engine head attachment portion. The valve lash adjustment system also includes an instrument assembly including at least one position sensor and at least one display unit. The valve lash adjustment system further includes a gap setting gauge assembly having a clip member. | 10-02-2014 |
20140366826 | RETENTION DEVICE FOR VALVE ACTUATING MECHANISM - A retention device to secure a finger follower and lash adjuster of a valve actuating mechanism together includes a ring member disposed in a groove of a movable piston of the lash adjuster. The retention device also includes a plurality of connecting members formed from the finger follower and extending axially below the ring member and about a portion of the lash adjuster to engage the ring member in all operating positions of the valve actuating mechanism as a result of the pivoting motion of the finger follower. | 12-18-2014 |
20150369095 | LATCH INTERFACE FOR A VALVE ACTUATING DEVICE - A novel latch seat for a switching rocker arm assembly used in variable valve actuation (VVA) systems for internal combustion engines. The seat is formed interactively in the assembled switching rocker arm using a novel fixture and press. The press interactively creates a curved dimple of the correct curvature, position and depth while measuring several lash dimensions. Since the latch seat is formed on the assembled rocker arm assembly, the latch seat depth is designed to account for the inaccuracies in the rocker arm assembly parts which create lash. Therefore all of the parts may be made with less precision since the latch seat is sized to compensate for the inaccuracies of all of the parts. The rocker arm assembly parts now may be manufactured to less stringent standards, but result in a rocker arm assembly with same accuracy of rocker arm assemblies manufactured to previous standards. | 12-24-2015 |
20160003111 | SWITCHABLE FINGER FOLLOWER WITH LASH ADJUSTMENT SHIM - A switchable finger follower, including an inner lever and an outer lever. The outer lever is mounted for pivoting movement to the inner lever. A coupling device is located on one of the inner or outer levers and has a coupling pin arranged to move between a locking position, in which the inner and outer levers are connected together for movement in an activation direction, and an unlocked position, in which the inner lever is pivotable relative to the outer lever. A coupling projection is located on the other of the inner or outer lever. The coupling pin engages beneath a coupling surface of the projection in the locking position, and a stop surface of the projection contacts a second stop surface on the one of the inner lever or the outer lever. The second stop surface is located on a removable shim that is replaceable for lash adjustment. | 01-07-2016 |
20160102584 | MECHANICAL LASH CONTROL FOR A SWITCHABLE ROLLER FINGER FOLLOWER - A switchable finger follower, including an inner lever and an outer lever. The outer lever is mounted for pivoting movement to the inner lever. A coupling device is located on one of the inner or outer levers and has a locking pin arranged to move between a locking position, in which the inner and outer levers are connected together for movement in an activation direction, and an unlocked position, in which the inner lever is pivotable relative to the outer lever. A coupling projection is located on the other of the inner or outer lever. The locking pin engages beneath the projection in the locking position, and the locking pin includes a flat at a defined flat height that contacts the coupling surface in the locking position and is selected from a number of locking pins having different flat heights to set a desired mechanical coupling device lash. | 04-14-2016 |
20190145287 | Valve Mechanism and Mechanical Lash Adjuster | 05-16-2019 |
123900460 | Hydraulic | 30 |
20080196683 | HIGH PERFORMANCE OVERHEAD VALVETRAIN ASSEMBLY - A high performance overhead valvetrain assembly includes a hydraulic lash adjuster which is received within and supports a trunnion. The trunnion, in turn, is received within a cylindrical passageway in one end of a rocker arm. The opposite end of the rocker arm engages a valve stem. Between the trunnion and the valve stem is a roller adapted the engage a cam of a camshaft. The trunnion stabilized rocker arm permits significantly increased valve lift and improved engine performance. | 08-21-2008 |
20080216785 | Lash adjuster - A lash adjuster includes a plunger and a cylinder. The cylinder includes a high-pressure chamber defined therein. The plunger has a valve port provided through a bottom wall thereof. The valve port includes a seat. A spherical valve body is accommodated in the high-pressure chamber. The valve body is made of ceramic material containing silicon nitride. The valve body is arranged to have a surface roughness average (Ra) of equal to or less than 0.13 μm. The valve body is arranged to have a contact pressure of equal to or lower than 1386 Mpa with the seat in a state where the valve port is closed by the valve body. | 09-11-2008 |
20080223325 | Engine brake having an articulated rocker arm and a rocker shaft mounted housing - A system for actuating an engine valve is disclosed. The system may include a lost motion housing having two spaced collars surrounding a rocker shaft. The lost motion housing may include an internal hydraulic circuit connecting a master piston bore with a slave piston bore. The lost motion housing may include a means for securing the lost motion housing in a fixed position relative to the rocker shaft. A master piston may be disposed in the master piston bore and a slave piston may be disposed in the slave piston bore. A rocker arm may be disposed on the rocker shaft between the spaced collars and may have a first portion adapted to contact a cam and a second portion adapted to contact the master piston. In a preferred embodiment, the system may be used to provide compression release engine braking or bleeder engine braking. | 09-18-2008 |
20080308055 | Variable valve actuation system - A variable valve actuation system to actuate and control the seating velocity of an internal combustion engine valve is disclosed. The system may comprise a rocker arm that includes first, second and third contact surfaces. The first contact surface may contact the engine valve. A hydraulic lost motion system may contact the rocker arm at the second contact surface, and a mechanical valve train element may contact the rocker arm at the third contact surface. The lost motion system may include a slave piston with a valve seating device incorporated therein. The lost motion system and the mechanical valve train element may be provided side by side at the end of the rocker arm opposite that of the engine valve. | 12-18-2008 |
20090031976 | Hydraulic Lash Compensation Device With Mechanical Lift Loss Feature - A hydraulic lash compensation device for an engine includes a plunger assembly slidingly received within a body bore to define a high pressure chamber. The plunger assembly includes a lower pressure chamber, an upper plunger element, and a lower plunger element. A mechanical lift loss feature includes a generally annular lift stop member retained to the upper plunger element by an adjustment member that extends through the lift stop member and is adjustably received in upper plunger element. The lift stop member is biased away from upper plunger element by a spring. When the upper plunger element is received into the body, the upper plunger element is offset a predetermined distance from the lower plunger element by virtue of the lift stop member's engagement with the lower plunger element. The offset is adjustable based on the position of the lift stop member relative to the upper plunger element. | 02-05-2009 |
20090145390 | VALVE OPERATING SYSTEM FOR VARIABLE DISPLACEMENT INTERNAL COMBUSTION ENGINE - A cylinder valve operating system for a variable displacement internal combustion engine having poppet valves includes a cam arm driven by a camshaft and a valve arm selectively driven by the cam arm. A valve arm positioner, which may be hydraulically cushioned, adjustably maintains the valve arm in contact with the valve stem when the valve arm is not being driven by the cam arm, in order that the valve arm will be accurately located for speedy and precise linkage of the cam arm to the valve arm. | 06-11-2009 |
20090159028 | HYDRAULICALLY LASHED END PIVOT ROCKER ARM - A hydraulically lashed end pivot rocker arm assembly finds application in high performance valve trains of internal combustion engines. The rocker arm is mounted at one end upon an eccentric bearing assembly and includes a surface for engaging a valve stem at the opposite end and a roller engaged by a camshaft disposed between the ends. The eccentric bearing assembly includes a stub shaft or cylindrical body that is received within a bore in the rocker arm and an eccentric bore which receives an inner shaft which extends along the cylinder head and supports the eccentric bearings and the rocker arm assemblies. The stub shaft or cylindrical body includes an ear or lug which is engaged by a hydraulic lash adjuster disposed parallel to and offset from the vertical plane of motion of the rocker arm. | 06-25-2009 |
20090288626 | Valve bridge having a centrally positioned hydraulic lash adjuster - A valve bridge configured to engage an engine valve is disclosed. The valve bridge includes a bridge cavity formed within a center portion of the valve bridge and including a bottom surface. A hydraulic lash adjuster is slidably disposed within the bridge cavity. | 11-26-2009 |
20090308339 | Switchable valve train device having a single locking pin - A switchable valve train device including a pin housing slidably disposed in a body and having a transverse bore. A stepped plug in the transverse bore extends beyond the pin housing to engage a slot in the body to prevent rotation of the pin housing. The upper end of the slot limits travel of the pin housing. The plug is a seat for a compression spring. A locking pin is disposed in the transverse bore against the spring to selectively engage a locking port in the body, the locking pin and the locking port have mating flats to distribute the load. Mechanical lash is set by use of a gage tool during assembly, allowing selection of a locking pin of appropriate thickness. The device may be, for example, a switchable hydraulic lash adjuster or a switchable valve lifter. | 12-17-2009 |
20100071648 | LASH ADJUSTER - A lash adjuster is provided which includes a cylindrical housing having an open top and formed with an internal thread on an inner periphery thereof, a screw rod having an external thread formed on an outer periphery thereof and in threaded engagement with the internal thread, and a spring biasing the screw rod outwardly of the housing. Each of the internal thread and the external thread having a pressure flank configured to receive pressure when a force that tends to push the screw rod into the housing acts on the screw rod, and a clearance flank having a smaller flank angle than the pressure flan. The screw rod has an end protruding from the housing and configured to support an arm of a valve operating mechanism so as to be pivotable about this end. Oil film expelling grooves are formed in the pressure flank of the external thread, using a tap having a thread that extends so as to cross the internal thread. | 03-25-2010 |
20100108007 | ROCKER SHAFT MOUNTED ENGINE BRAKE - A system for actuating an engine valve is disclosed. The system may include a lost motion housing having two spaced collars surrounding a rocker shaft. The lost motion housing may include an internal hydraulic circuit connecting a hydraulic fluid supply passage with an actuator piston. The system may include a means for securing the lost motion housing in a fixed position relative to the rocker shaft. | 05-06-2010 |
20100251983 | INDIVIDUAL ROCKER SHAFT AND PEDESTAL MOUNTED ENGINE BRAKE - A system for actuating an engine valve is disclosed. The system may include a lost motion housing having two spaced collars surrounding a rocker shaft. The lost motion housing may include an internal hydraulic circuit connecting a hydraulic fluid supply passage with an actuator piston. The system may include a means for securing the lost motion housing in a fixed position relative to the rocker shaft. | 10-07-2010 |
20100275864 | VALVE DRIVE SYSTEM - A valve drive system ( | 11-04-2010 |
20110000451 | COUPLING DEVICE - A unitized valve train assembly includes a finger follower having a pocket and a peripheral surface adjacent the pocket, and a hydraulic lash adjuster having a body, and a plunger extending from the body and received within the pocket of the finger follower. The plunger defines a longitudinal axis. The assembly also includes a single-wire coupling device having a first arm configured to selectively engage the finger follower, and a second arm clamped to one of the body and the plunger. The second arm is spaced from the peripheral surface of the finger follower when the plunger is received within the pocket of the finger follower. | 01-06-2011 |
20110220052 | INTERNAL COMBUSTION PISTON ENGINE WITH AN ADJUSTABLE INFLATING ELEMENT - An internal combustion piston engine based on a four-stroke process, having a crankcase in which at least one cylinder/piston assembly is arranged, the piston being guided by a connecting rod connected to a crankshaft. At least one cylinder head ( | 09-15-2011 |
20110271923 | ROCKER ARM - A rocker arm for a tappet pushrod valve train, which has a contact surface for a gas exchange valve on an underside at one end and a first bore in which a hydraulic lash adjusting element is arranged at another end. A second bore extends transverse through the rocker arm, between the ends. From the second bore, a passage leads to the first bore. A venting passage extends from a bottom of the bore at the another end and has an outlet aligned with the primary passage. A secondary passage branches from the venting passage and has an opening that extends to an upper side of the rocker arm and is situated in a longitudinal channel. The channel extends along the upper side and into a region on the one end. From the region, the hydraulic medium can be routed through an end passage to the contact surface. | 11-10-2011 |
20110290206 | ROCKER SHAFT PEDESTAL INCORPORATING AN ENGINE VALVE ACTUATION SYSTEM OR ENGINE BRAKE - A system for actuating an engine valve is disclosed. The system may include a rocker shaft having a hydraulic fluid supply circuit extending through the rocker shaft to a port on the outer surface of the rocker shaft and a solenoid valve adapted to selectively supply hydraulic fluid to the rocker shaft hydraulic fluid supply circuit. The rocker shaft may be supported by one or more rocker shaft pedestals. A lost motion housing may be incorporated into a rocker shaft pedestal and disposed about the rocker shaft. The lost motion housing may have an actuator piston assembly and a control valve assembly connected by an internal hydraulic circuit. The lost motion housing may be secured in a fixed position relative to the rocker shaft. External hydraulic fluid tubing may be provided between the solenoid valve and the control valve in the form of jumper tubes extending between adjacent rocker shafts or in the form of external hydraulic fluid tubes extending from control valve to control valve. | 12-01-2011 |
20110303174 | VARIABLE VALVE APPARATUS OF INTERNAL COMBUSTION ENGINE - An object of the present invention is to decrease the size of rocker arms and reduce friction in a variable valve apparatus of an internal combustion engine having a hydraulic lash adjuster arranged in rocker arms. A variable valve apparatus of an internal combustion engine of the present invention includes a first rocker arm that contacts a cam, a zero lift cam (low lift cam) provided coaxially with the cam, second rocker arms capable of contacting the zero lift cam, a switching mechanism capable of connecting the first rocker arm and the second rocker arm to each other through a pin, valves that open by being pressed by the second rocker arms via hydraulic lash adjusters arranged in the second rocker arms, and an oil supply path formed inside the second rocker arms that supplies oil to the hydraulic lash adjusters. A radius of a base circle of the zero lift cam is smaller than a radius of a base circle of the cam. | 12-15-2011 |
20120160200 | Engine Valve System - An engine valve system comprises two cams ( | 06-28-2012 |
20120167850 | ASSEMBLY FOR A VALVE TRAIN OF AN INTERNAL COMBUSTION ENGINE - An assembly for a valve train of an internal combustion engine, which has a hydraulic support element and a cam follower resting on one end via a bearing surface located on the bottom side thereof on a complimentary end side of a pressure piston of the support element. The piston extends across the outer shell in a bore of a crucible-shaped housing of the support element. The housing has an opening for hydraulic fluid, which is conductable via a channel between the housing and piston through a passage in the pressure piston to a storage chamber. In a section of a direct contact region between the bearing surface of the cam follower and end side of the piston, an anti-turn mechanism for the piston in relation to the cam follower is implemented. The piston is installed in a defined manner and is torsionally oriented in relation to the cam follower. | 07-05-2012 |
20120186549 | OSCILLATING LEVER IN A VALVE TRAIN OF AN INTERNAL-COMBUSTION ENGINE - A rocker or swing arm in a valve train of an internal combustion engine has a bearing bore pivotally supporting the arm on a hollow axis located in a fixed position in the engine. The valve train has a camshaft with cams for causing the arm to pivot. A hydraulic valve lash compensation element that acts on the tappet of a gas exchange valve connects to the arm. A supply line is arranged in the arm, and a radial opening connecting the hollow interior space of the axis to the supply line is arranged in the axis in the region of the arm to deliver hydraulic means through the hollow axis to the lash compensation element. According to the invention, a A labyrinth seal (35) surrounding the hollow axis without contact is arranged on the arm at each axial end of the bearing bore. The bearing space of the arm is laterally sealed by this means. | 07-26-2012 |
20130061824 | ASSEMBLY OF A VALVE OPERATING SYSTEM INCORPORATING A CAM SUMMATION MECHANISM - A method is disclosed for assembling a valve operating system for opening and closing a poppet valve mounted on an engine cylinder head. The valve operating system comprises a camshaft | 03-14-2013 |
20130233265 | SYSTEM TO DIAGNOSE VARIABLE VALVE ACTUATION MALFUNCTIONS BY MONITORING FLUID PRESSURE IN A HYDRAULIC LASH ADJUSTER GALLERY - A system for diagnosing malfunctions in a variable valve actuation device is disclosed. The system has a rocker arm assembly that includes: a first arm, a second arm with the first and second arms attached at a first end, a hydraulically operated latch assembly that functions to secure the first arm to the second arm when latched. The rocker arm assembly pivots upon a hydraulic lash adjuster. It also includes a source of pressurized fluid connected to a hydraulic valve that provided fluid high or low pressure fluid to the hydraulically-operated latch. The latch may be operated by a remote device. A pressure transducer is positioned within the hydraulic lash adjuster (HLA) and is adapted to create a signal indicating the fluid pressure in the HLA. A control unit is coupled to the hydraulic valve and the pressure transducer, and is adapted to sense engine operation parameters, actuate the hydraulic valve, read the signal from the pressure transducer and identify malfunctions of the rocker arm assembly based upon the signal from the transducer. | 09-12-2013 |
20140020644 | SYSTEMS AND METHODS FOR HYDRAULIC LASH ADJUSTMENT IN AN INTERNAL COMBUSTION ENGINE - Systems and methods for actuating engine valves for positive power and engine braking operation are disclosed. The systems may include a self-lashing hydraulic piston slidably disposed in a fixed or rocker arm housing. The hydraulic piston may have an internal cavity in which a motion absorbing piston is disposed. A hydraulic fluid source may communicate with the hydraulic piston bore. A check valve which may be incorporated in a control valve may controls hydraulic fluid supply from the hydraulic fluid source to the hydraulic piston to provide self-lashing operation of the valve actuation system. | 01-23-2014 |
20140216378 | STATIONARY HYDRAULIC LASH ADJUSTER AND ROLLER FINGER FOLLOWER ASSEMBLY CLIP, AND METHOD THEREOF - An assembly clip for holding together a stationary hydraulic lash adjuster (SHLA) and a roller finger follower (RFF) in a valve train of an internal combustion engine (ICE) is provided. The SHLA has a pivot, and the RFF has a pivot cap configured to fit around the pivot. The assembly clip includes a first attachment section and a second attachment section configured to engage with the pivot cap and pivot, respectively, to attach the assembly clip to the RFF and SHLA, respectively. When assembled, the pivot and the pivot end are substantially located between the first attachment section and the second attachment section, the pivot cap covering at least a portion of the pivot. The assembly clip is made of an oil soluble material such that it may dissolve and break away after the valve train is assembled into the ICE, and the assembly clip no longer serves a function. | 08-07-2014 |
20140230766 | LASH ADJUSTER - A lash adjuster includes a body, a plunger inserted into the body and having a bottom wall with a valve hole and a peripheral wall having an oil passage hole, and a partitioning member. The plunger defines a high-pressure chamber. The partitioning member is inserted into the plunger and has an oil passage end located above the oil passage hole in an inserted state. The partitioning member has a recess defining an oil passage together with the peripheral wall. The partitioning member defines a low-pressure chamber reserving hydraulic fluid and has, together with the recess, a press-fit portion abutting against an inner periphery of the peripheral wall when the partitioning member is inserted into the plunger. Consequently, the press-fit portion has a deformed cross-sectional shape except for a circular shape when cut at a same height as the oil passage hole. | 08-21-2014 |
20140230767 | LASH ADJUSTER - A lash adjuster includes a body, a plunger inserted into the body and a partitioning member inserted into the plunger. The plunger has a bottom wall with a valve hole and a peripheral wall having an oil passage hole. The plunger defines a high-pressure chamber between the bottom wall and the body. The partitioning member has a plate-like baffle located opposite the passage hole. The baffle has an upper end serving as an oil passage end located above the passage hole. The plunger has interior divided into two spaces by the baffle. The passage hole is located at one space side. An oil passage is defined at one space side. A low-pressure chamber is defined at the other space side to store hydraulic fluid flowing through the passage hole, the oil passage and the passage end. The low-pressure chamber supplies the fluid through the valve hole into the high-pressure chamber. | 08-21-2014 |
20140230768 | LASH ADJUSTER - A lash adjuster includes a body formed into a bottomed cylindrical shape, a plunger movably inserted into the body and having a peripheral wall having an oil passage hole, and a partitioning member inserted into the plunger. The plunger defines a high-pressure chamber between the body and a plunger underside and includes a first threaded portion formed in an inner periphery of the peripheral wall. The partitioning member has an oil passage end located above the oil passage hole and an oil passage is defined between an outer surface of the partitioning member and the plunger peripheral wall. A low-pressure chamber is defined inside the partitioning member to reserve hydraulic fluid flowing through the oil passage hole. The hydraulic fluid is then supplied into the high-pressure chamber. The partitioning member has an outer periphery formed with a second threaded portion threadingly coupled with the first threaded portion. | 08-21-2014 |
20140283776 | DUAL FEED HYDRAULIC LASH ADJUSTER FOR VALVE ACTUATING MECHANISM - A dual feed hydraulic lash adjuster includes a plunger assembly slidingly disposed in a lash adjuster body and having an end adapted to cooperate with a valve actuating mechanism, the plunger assembly forming a low-pressure first chamber and a high-pressure second chamber with the body, the plunger assembly having a first aperture fluidly communicating with the first chamber, a passageway fluidly communicating with the first chamber, and a second aperture fluidly communicating with the passageway, and a separate fluid pressure separator disposed in the plunger assembly between the first aperture and the second aperture to prevent passage of hydraulic fluid between the first chamber and the passageway, wherein a passage is provided through the fluid pressure separator to provide for evacuation of air from the lash adjuster. | 09-25-2014 |
20140366827 | LASH ADJUSTER - A lash adjuster is configured that reduces the impact at the time when a pressure force is exerted on a pressure-receiving effector, and reliably opens a valve by the necessary amount. This lash adjuster includes, in a relatively movable manner, the pressure-receiving effector that receives the pressure force and a relay effector that performs an operation of opening an intake valve, a pressure receiving-side damper space is formed at an insertion portion thereof, and an orifice portion is formed that suppresses an outflow of oil in the pressure receiving-side damper space when the pressure-receiving effector and the relay effector move in approaching directions. An abutting portion is formed that directly transmits the pressure force of the pressure-receiving effector to the relay effector when the pressure-receiving effector and the relay effector approach each other. | 12-18-2014 |