Cam-to-valve Relationship Patents (Class 123/90.16)
  • Patent number: 11448104
    Abstract: A Type II valvetrain and engine brake arrangement includes a hydraulic brake housing mountable to a valve block of the engine. A brake piston is coupled to a brake rod and a brake cam lobe and is movable between an activated position and a non-activated position. A finger follower is disposed relative to the brake housing so that the brake rod engages the finger follower at least when the brake piston is in the activated position. When the brake piston is in a non-activated position, the finger follower is configured to pivot about a pivot as the finger follower follows a valve cam lobe to effect lifting and seating of a cylinder valve of an engine cylinder. When the brake piston is in the activated position, the finger follower, at least in part, pivots from about the pivot and the brake rod engages an end of the finger follower to lift the cylinder valve and release compression from the engine cylinder.
    Type: Grant
    Filed: October 18, 2021
    Date of Patent: September 20, 2022
    Assignee: DEERE & COMPANY
    Inventor: Neil S. Erickson
  • Patent number: 11448105
    Abstract: A valve mechanism includes a valve, a camshaft, an intermediate swing arm located between a cam and the valve, a lift regulating mechanism and a roller assembly. The cam drives the valve to move by means of the intermediate swing arm. The roller assembly is supported by the cam, an eccentric wheel of the lift regulating mechanism and an intermediate swing arm roller. A peripheral surface of the eccentric wheel includes a lift regulating section having a start point and an end point, a maximum lift point of the lift regulating section is located between the start point and the end point, and the lift regulating section is divided into a first section which is convex and a second section having at least a part thereof concave.
    Type: Grant
    Filed: June 7, 2018
    Date of Patent: September 20, 2022
    Assignee: GREAT WALL MOTOR COMPANY LIMITED
    Inventors: Tao Liu, Ji Yin, Luping Liu, Liming Xu, Jiajia Hu, Fabao Yang, Song Zhang, Yanlong Fang, Lei Wang
  • Patent number: 11441494
    Abstract: A bi-fuel internal combustion engine system includes a first fuel system, a second fuel system, and a bi-fuel internal combustion engine. The bi-fuel internal combustion engine is configured to selectively consume one of a first fuel received from the first fuel system and a second fuel received from the second fuel system. The bi-fuel internal combustion engine includes a camshaft and a valve assembly. The camshaft has a cam. The valve assembly is positioned adjacent the camshaft and configured to interface with the cam. The valve assembly is selectively repositionable between a first position and a second position. The bi-fuel internal combustion engine has a first dynamic compression ratio when the valve assembly is in the first position and a second dynamic compression ratio when the valve assembly is in the second position. The second dynamic compression ratio is greater than the first dynamic compression ratio.
    Type: Grant
    Filed: December 3, 2018
    Date of Patent: September 13, 2022
    Assignee: Cummins Inc.
    Inventor: Anthony Kyle Perfetto
  • Patent number: 11396832
    Abstract: A valve timing adjusting device includes an intake variable valve mechanism and an exhaust variable valve mechanism. The exhaust variable valve mechanism includes an exhaust electric driving portion and an exhaust phase shifting portion including an input shaft. The exhaust phase shifting portion is disposed in a rotation transmission path between an exhaust camshaft and a crankshaft and configured to shift a rotation phase of the exhaust camshaft. The input shaft rotates in a rotational direction opposite to a rotational direction of the crankshaft when advancing the rotation phase. A phase of the exhaust phase shifting portion is configured to be shifted to a most advanced angle phase when the exhaust electric driving portion is de-energized or fails and when the exhaust phase shifting portion receives a torque in a forward rotational direction.
    Type: Grant
    Filed: April 9, 2021
    Date of Patent: July 26, 2022
    Assignee: DENSO CORPORATION
    Inventors: Kazuaki Nemoto, Akio Imai
  • Patent number: 11377984
    Abstract: The present invention relates to a coupling device for a valve-actuating device for actuating at least one valve of a reciprocating machine having variable valve lift, in particular for a valve-actuating device of a reciprocating internal combustion engine, to a valve-actuating device and to a reciprocating machine, the coupling device comprising a first coupling element, a second coupling element and a blocking means. The first coupling element and the second coupling element can be displaced relative to one another at least within defined boundaries along a first axis, it being possible for the blocking means to block the relative displacement of the two coupling elements with respect to one another along the first axis at least in a first direction.
    Type: Grant
    Filed: August 1, 2018
    Date of Patent: July 5, 2022
    Assignee: AVL List GmbH
    Inventors: Martin Klampfer, Andreas Zurk, Thomas Salmutter, J├╝rgen Gelter
  • Patent number: 11371396
    Abstract: The present invention relates to a switchable actuation device (100) for a gas exchange valve. The switchable actuation device (100) comprises a two-piece rocker arm (10). Said rocker arm comprises a first rocker arm portion (1a), which is mounted pivotably about a rocker arm shaft (2) and to which a bearing sleeve (1a1) is fastened concentrically with the rocker arm shaft (2), and a second rocker arm portion (1b) mounted pivotably on the bearing sleeve (1a1). Furthermore, both the first and the second rocker arm portions (1a, 1b) each comprise a cut-out (3a, 3b), wherein a locking element (4a) of a coupling device (4) of the switchable actuation device (100) can optionally be brought into and out of engagement with the two cut-outs (3a, 3b). An actuation of the poppet valve, preferably a change between a closed position and an open position of the poppet valve, is interrupted if the locking element (4a) is not in engagement with the two cut-outs (3a, 3b).
    Type: Grant
    Filed: December 12, 2019
    Date of Patent: June 28, 2022
    Assignee: MAN TRUCK & BUS SE
    Inventors: Johannes Hollweck, Thorsten Bachmann
  • Patent number: 11333098
    Abstract: An engine controller calculates a pulsation correction value based on actuation states of an air bypass valve (ABV) and a wastegate valve (WGV) that change the shape of intake and exhaust flow passages of an exhaust turbocharger. The pulsation correction value is used to compensate for an output error of an airflow meter caused by intake pulsation. The engine controller also calculates a fuel injection amount of an injector, based on an output of the airflow meter that has been corrected based on the pulsation correction value.
    Type: Grant
    Filed: January 14, 2021
    Date of Patent: May 17, 2022
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Akito Uchida, Koji Aso
  • Patent number: 11326482
    Abstract: Methods and systems are provided for a valve system for actuating two cylinder valves in an engine. In one example, the valve system may include a single pump and a solenoid valve capable of non-concurrently actuating the two cylinder valves coupled to separate cylinders.
    Type: Grant
    Filed: November 4, 2019
    Date of Patent: May 10, 2022
    Assignee: Ford Global Technologies, LLC
    Inventor: Michael Shelby
  • Patent number: 11319840
    Abstract: A rocker arm assembly comprises a valve side rocker arm portion, a cam side rocker arm portion configured to selectively rotate relative to the valve side rocker arm portion, and a latch pin assembly disposed in the valve side rocker arm portion and in the cam side rocker arm portion. Portions of the latch pin assembly are configured to move so that when the cam side rocker arm portion selectively rotates, the valve side rocker arm portion switches among a full lift mode, a partial lift mode, and a lost motion lift mode.
    Type: Grant
    Filed: August 7, 2019
    Date of Patent: May 3, 2022
    Assignee: Eaton Intelligent Power Limited
    Inventors: Mark Van Wingerden, Douglas J. Nielsen
  • Patent number: 11313258
    Abstract: A continuous variable valve duration apparatus includes a cam unit, a cam formed on the cam unit, a camshaft inserted into the cam, a guide bracket, a guide shaft mounted on the guide bracket and disposed perpendicular to the camshaft, wherein a guide screw thread is formed on the guide shaft, a wheel housing disposed within the guide bracket, an inner wheel rotatably inserted into the wheel housing and movable perpendicular to the camshaft, a worm wheel disposed within the wheel housing, wherein an inner screw thread configured to engage with the guide screw thread is formed inside the worm wheel and an outer screw thread is formed on the worm wheel, a control shaft, a control worm formed on the control shaft, and a wheel elastic portion mounted to the wheel housing.
    Type: Grant
    Filed: June 23, 2020
    Date of Patent: April 26, 2022
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: You Sang Son, In Sang Ryu, Kyoung-Pyo Ha, Dongheon Park, Back Sik Kim, Seung Jae Lee
  • Patent number: 11313259
    Abstract: In an internal combustion engine, a linkage is provided between an auxiliary motion source and a main motion load path, such that motions received by the linkage from the auxiliary motion source result in provision of a first force to at least one engine valve and a second force to the main motion load path in a direction toward a main motion source. Where an automatic lash adjuster is associated with the main motion load path, the second force may be selected to aid in the control of lash adjustments made by the automatic lash adjuster. In various embodiments, the linkage may be embodied in an mechanical linkage, whereas in other embodiments, an hydraulic linkage may be employed. The linkage may be incorporated into, or otherwise cooperate, a valve bridge or a rocker arm.
    Type: Grant
    Filed: February 20, 2020
    Date of Patent: April 26, 2022
    Assignee: Jacobs Vehicle Systems, Inc.
    Inventors: Peter Jo, Justin Baltrucki, David Ferreira, Neenad Wamane
  • Patent number: 11313288
    Abstract: A method of two-step variable valve lift (VVL) malfunction avoidance learning control may include: in a two-step VVL system which is operated with a main lift and a secondary lift, verifying, by an electronic control unit (ECU), an operation avoidance area based on locking of a lock pin of a cam follower ; performing VVL operation learning, in which a failure of occurrence of the second lift is determined on the basis of a locking failure of the cam follower due to an initially set value of the operation avoidance area; and reflecting the operation avoidance area to the two-step VVL system with a corrected set value which is obtained through the VVL operation learning.
    Type: Grant
    Filed: November 27, 2019
    Date of Patent: April 26, 2022
    Assignees: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATION
    Inventor: Jae-Hyeok Song
  • Patent number: 11313253
    Abstract: A rocker arm can comprise a cam arm, a valve arm, a lost motion spring, and a pair of deactivatable latches configured to impede travel of the cam arm with respect to the lost motion spring and configured to enable the cam arm to collapse the lost motion spring. The cam arm can comprise a cam interface, a spring pressing area, a cam arm body, and a pivot axle connection. The valve arm can comprise a valve arm body, a rocker shaft bore, a latch socket, and lost motion spring mount. A pivot axle can connect the valve arm body to the cam arm body. Alternatively, a latch socket in a valve arm neck comprises a latch assembly whereby a deactivatable latch is configured to impede motion of the cam arm and to collapse so the cam arm can collapse the lost motion spring.
    Type: Grant
    Filed: July 26, 2019
    Date of Patent: April 26, 2022
    Assignee: Eaton Intelligent Power Limited
    Inventors: Mark Van Wingerden, Ryan Krieger
  • Patent number: 11300015
    Abstract: A valvetrain for a type II engine comprises a valve bridge, a switching rocker arm, a center capsule, a first auxiliary rocker arm, and a first auxiliary capsule. The selectively switching rocker arm is configured to switch configurations to transfer a first valve actuation profile from a first overhead cam lobe to the valve bridge center point and to transfer a second valve actuation profile from a second overhead cam lobe to the center point. The center capsule is configured to switch between an active state and a lost motion state. The first auxiliary rocker arm is configured to transfer a first auxiliary valve actuation profile from a third overhead cam lobe to the valve bridge first valve mounting area. The valvetrain can further comprise a second auxiliary rocker arm and a second auxiliary capsule.
    Type: Grant
    Filed: July 12, 2019
    Date of Patent: April 12, 2022
    Assignee: Eaton Intelligent Power Limited
    Inventors: James E. McCarthy, Jr., Mihai Dorobantu
  • Patent number: 11300014
    Abstract: A switching finger follower for an engine valve train utilizes an adjustable support assembly that eliminates potential for partial engagement during operation. A lever engagement member or latch is disposed for movement on the follower body and interacts with a lever to provide a constant contact geometry. The finger follower may be configured as a lost motion device and may include a biasing assembly and a travel limiter. The latch may support the lever in at least one precise position and may support the lever in a second position for partial lost motion, or permit the lever to pivot free of the latch for complete lost motion, as in cylinder deactivation applications.
    Type: Grant
    Filed: July 12, 2021
    Date of Patent: April 12, 2022
    Assignee: Jacobs Vehicle Systems, Inc.
    Inventors: John Mandell, Justin D. Baltrucki, Gabriel S. Roberts, Robb Janak
  • Patent number: 11286818
    Abstract: A modular exhaust valve rocker arm assembly system comprising first and second rocker arm assemblies configured to each selectively receive a hydraulic lash adjustment assembly or a mechanical lash adjustment assembly. A main lifter assembly operably associated with the first and second rocker arm assemblies. An added motion lifter assembly operably associated with the first rocker arm assembly and configured to selectively provide one of an early lift profile and an extended lift profile, which can comprise at least one of an engine braking feature, a late intake valve closing (LIVC) feature, and an early exhaust valve opening (EEVO) feature. The main lifter can be configured as a fixed lifter or as a deactivating lifter for cylinder deactivation (CDA) configured to selectively move to a deactivated state configured to absorb motion of a normal lift profile cam into lost motion.
    Type: Grant
    Filed: May 10, 2017
    Date of Patent: March 29, 2022
    Assignee: Eaton Intelligent Power Limited
    Inventors: James E. McCarthy, Jr., Mark Van Wingerden
  • Patent number: 11286817
    Abstract: A rocker arm assembly comprises a valve side rocker arm portion, a cam side rocker arm portion configured to selectively rotate relative to the valve side rocker arm portion, and a latch pin assembly disposed in the valve side rocker arm portion and in the cam side rocker arm portion. A latch pin assembly is disposed for selective switching in the valve side latch bore and in the cam side latch bore. At least a portion of the latch pin assembly is configured so that when the latch pin assembly is selected to switch from a latched condition to the unlatched condition, and when the cam side rocker arm portion selectively rotates, the latch pin assembly is configured to retract from the forces of the rotation.
    Type: Grant
    Filed: September 11, 2020
    Date of Patent: March 29, 2022
    Assignee: Eaton Intelligent Power Limited
    Inventors: Andrei D. Radulescu, Mark Van Wingerden, Douglas J. Nielsen
  • Patent number: 11280229
    Abstract: An actuation apparatus for actuating one or more components of a respective one or more switchable valve train devices of a first group of switchable valve train devices, and for actuating one or more components of a respective one or more switchable valve train devices of a second group of switchable valve train devices, the actuation apparatus including: a body rotatable by an actuation source about a rotation axis; a first shaft including a first set of one or more levers for actuating the one or more components of the first group of switchable valve train devices, the first shaft including a first element for contacting the body and moveable by the body in use to cause the first shaft to rotate; and a second shaft including a second set of one or more levers for actuating the one or more components of the second group.
    Type: Grant
    Filed: March 6, 2019
    Date of Patent: March 22, 2022
    Assignee: Eaton Intelligent Power Limited
    Inventors: Mirko Guaschino, Nicola Andrisani, Jan Kindermann, Yuriy Mysak
  • Patent number: 11274576
    Abstract: The disclosure relates to a preassembled module of a variable-lift valve train for an internal combustion engine. The module includes an electric linear actuator that lies on a top side of a base plate of the module. A slide plate, movable by the electric linear actuator by means of a linear guide, also lies on the top side of the base plate. A retaining wall extends under a bottom side of the base plate and has two actuation fingers. A free end of each actuation finger includes a contact surface for moving a coupling slide of a switchable rocker arm. In a region of an outer transverse side of the slide plate, a contact wall arranged in front of the electric linear actuator extends upward. The contact wall contacts an actuation pin of the electric linear actuator to move the slide plate in a longitudinal direction.
    Type: Grant
    Filed: June 5, 2019
    Date of Patent: March 15, 2022
    Assignee: Schaeffler Technologies AG & Co. KG
    Inventor: Benedikt Noe
  • Patent number: 11261764
    Abstract: A rocker arm assembly constructed in accordance to one example of the present disclosure includes an outer rocker arm and an inner rocker arm. The outer rocker arm has a first roller configuration that rotates around a first axis. The inner rocker arm has a second roller configuration that rotates around a second axis. The inner rocker arm is configured to move between a latched and unlatched position relative to the outer rocker arm. One of the first and second axes is positioned for alignment over an engine valve. The other of the first and second axes is offset from the engine valve.
    Type: Grant
    Filed: October 26, 2020
    Date of Patent: March 1, 2022
    Assignee: Eaton Intelligent Power Limited
    Inventors: James E. McCarthy, Jr., Dale Arden Stretch
  • Patent number: 11261818
    Abstract: A vehicle control system for a powertrain including an internal combustion engine having an intake valve and an exhaust valve in a vehicle includes an electronic control unit (ECU) operable to control a continuously variable valve duration (CVVD) of the intake and exhaust valves in the engine, a communicator operable to receive an input data from at least one input system, and a storage device having predetermined calibration value. The ECU of the vehicle control system is configured to reference the predetermined calibration values based on a received input data, determines to adjust the CVVD of the intake and exhaust valves, and send a signal to the engine for changing an overlap area of the CVVD. The vehicle control system operates a process for controlling the CVVD of the engine as a method.
    Type: Grant
    Filed: November 19, 2019
    Date of Patent: March 1, 2022
    Assignees: Hyundai Motor Company, KIA Motors Corporation
    Inventor: Dean Schlingmann
  • Patent number: 11236643
    Abstract: An actuation apparatus for actuating a component of a switchable valve train device of an internal combustion engine including: a shaft; an actuation lever mounted on the shaft for pivotal motion of the actuation lever between a first position for actuation of the component and a second position for de-actuation of the component; and a biasing means for urging the actuation lever from the second position towards the first position. In use, the biasing means is biased when an actuation source attempts to cause the actuation lever to be in the first position when the component is non-actuatable, such that the biasing means causes the actuation lever to pivot from the second position to the first position, thereby to actuate the component when the component becomes actuatable again.
    Type: Grant
    Filed: March 6, 2019
    Date of Patent: February 1, 2022
    Assignee: Eaton Intelligent Power Limited
    Inventors: Nicola Andrisani, Jan Kindermann, Mirko Guaschino, Yuriy Mysak
  • Patent number: 11236642
    Abstract: An engine valve actuation system includes a rotatable camshaft, a first valve lifter, and a second valve lifter, structured to actuate valves in an engine in response to rotation of cams of the camshaft. The engine valve actuation system includes an anti-rotation device having a collar with a sleeve portion and a boss portion, and a bridge connector structured to couple with one of the valve lifters. Another one of the valve lifters is slidably received in the sleeve portion. The anti-rotation device reciprocates with the one of the valve lifters, and each of the valve lifters is restricted from rotation during service.
    Type: Grant
    Filed: May 4, 2020
    Date of Patent: February 1, 2022
    Assignee: Caterpillar Inc.
    Inventors: Terrence Lee Szmania, Kshitij Anilkumar Shah, Vikram Kulkarni, Sivakumar Dharmaraj
  • Patent number: 11215088
    Abstract: A preassembled module for a variable-lift valve drive of an internal combustion engine is provided for installation into a cylinder head. The module has a base plate with an electric linear actuator which lies on an upper side of the base plate. A guide plate, which lies on the upper side, has an outer side wall arranged to guide a slide piece. The guide piece extends below the base plate two downwardly pointing actuating fingers. Each respective actuating finger has a contact surface for moving a transverse coupling slide of a switchable rocker arm. The slide piece has a bracket which protrudes over the guide plate with a contact landing arm which runs transversely relative to the electric linear actuator. An actuator-side end of the contact landing arm is in contact with an actuating pin of the electric linear actuator to move the slide piece.
    Type: Grant
    Filed: June 11, 2019
    Date of Patent: January 4, 2022
    Assignee: Schaeffler Technologies AG & Co. KG
    Inventors: Andreas Biermann, Benedikt Noe, Martin Steigerwald, Michael Pribek, Frank Himsel
  • Patent number: 11208921
    Abstract: A switching finger may operate in two or three states or positions and cooperate with a single motion source to achieve methods of operating an engine in corresponding two or three modes. The modes may include cylinder deactivation, main event or auxiliary modes, including lost motion braking, LIVC and EEVO. A follower for an engine valve train utilizes an adjustable support assembly that eliminates potential for partial engagement during operation. A lever engagement member or latch is disposed for movement on the follower body and interacts with a lever to provide a constant contact geometry. The latch may support the lever in one or more precise positions, or permit the lever to pivot free of the latch for complete lost motion, as in cylinder deactivation applications.
    Type: Grant
    Filed: May 28, 2020
    Date of Patent: December 28, 2021
    Assignee: Jacobs Vehicle Systems, Inc.
    Inventors: John Mandell, Gabriel S. Roberts, Robb Janak
  • Patent number: 11208922
    Abstract: An actuation transmission apparatus for actuating a latching arrangement for latching and unlatching a first body and a second body of a switchable valve train component of an internal combustion engine, the latching arrangement being biased from an unlatched position where the first body and the second body are unlatched towards a latched position where the latching arrangement latches the first body and the second body together, the actuation transmission apparatus including: a shaft rotatable by an actuation source; a contacting element for contacting the latching arrangement; and a biasing device for biasing the contacting element rotationally with respect to the shaft. In use, the biasing device becomes biased by the shaft when the actuation source rotates the shaft when the actuation source attempts to actuate the latching arrangement to the unlatched position, via the contacting element, when the latching arrangement is in an un-actuatable state.
    Type: Grant
    Filed: November 24, 2017
    Date of Patent: December 28, 2021
    Assignee: Eaton Intelligent Power Limited
    Inventor: Matthew Vance
  • Patent number: 11203953
    Abstract: A switchable finger follower, including an inner lever and an outer lever. The outer lever includes a pocket defined by two outer arms that extend along longitudinal sides of the inner lever. The outer lever is mounted for pivoting movement at the first end of the inner lever by a pivot axle, and a respective outer roller is separately mounted on an outer side of each of the two outer arms. 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 method of assembling a finger lever with outer rollers connected to the two outer arms is also provided.
    Type: Grant
    Filed: September 16, 2020
    Date of Patent: December 21, 2021
    Assignee: Schaeffler Technologies AG & Co. KG
    Inventors: Faheem Ahmed, Sumukha Nagaraj
  • Patent number: 11193401
    Abstract: A valve gear includes a lost motion mechanism including a lost motion spring. A pillar is inserted into the lost motion spring, and a seat supports a lower end portion of the lost motion spring. A protrusion is provided on an opposite side of the seat from the lost motion spring. When viewed from an axial direction of the lost motion mechanism, the protrusion does not project out of the seat. By fitting the protrusion into the recess of the cylinder head, the seat, i.e., the lost motion mechanism is attached to the cylinder head.
    Type: Grant
    Filed: December 8, 2020
    Date of Patent: December 7, 2021
    Assignee: YAMAHA HATSUDOKI KABUSHIKI KAISHA
    Inventor: Yasuo Okamoto
  • Patent number: 11193396
    Abstract: A pre-assembled module for a variable-stroke valve drive of an internal combustion engine is provided. The module includes a base plate having at least one projecting guide plate, an e-linear actuator positioned on the projecting guide plate, and a longitudinally guided push rod with two adjusting fingers extending along a wall of the guide plate. Each respective adjusting finger has a contact surface for displacement of a transverse coupling slide of a switchable cam follower. A rocker arm, having first and second arms, is suspended on an underside of the base plate; the first arm in contact with an adjusting pin of the linear actuator; and, the second arm in contact with the push rod for displacement thereof in a first direction. A spring means for displacement of the push rod in a second direction is arranged between the push rod and the guide plate.
    Type: Grant
    Filed: June 28, 2019
    Date of Patent: December 7, 2021
    Assignee: Schaeffler Technologies AG & Co. KG
    Inventors: Andreas Biermann, Benedikt Noe, Martin Steigerwald, Michael Pribek, Frank Himsel
  • Patent number: 11187118
    Abstract: The present invention refers to a charge changing control device for a reciprocating engine, comprising at least one cam follower configured for being pivotably actuated around a pivot axis (P) upon rotational movement of a camshaft, and an adjustment unit configured for setting at least three different charge-changing modes of the device by translationally displacing the pivot axis relative (P) to a rotational axis (R) of the camshaft.
    Type: Grant
    Filed: April 23, 2020
    Date of Patent: November 30, 2021
    Assignee: Caterpillar Motoren GmbH & Co. KG
    Inventors: Carsten Rickert, Eike Sixel, Pay Brodersen, Heiner Otte
  • Patent number: 11187119
    Abstract: Shown is a latch pin for use in a valve lifter and a valve lifter including the same. The latch pin for selectively latching within a pin chamber provided in the valve lifter is configured as a whole as a cylindrical pin with one end in the shape of a spherical crown, wherein a stepped flat is formed on radially one side of said one end and is dimensioned to be received within the pin chamber to engage with an axial latching surface thereof. On the top side of said one end, a first relief is formed by beveling the spherical crown, and on the radially other side opposite to the stepped flat across said first relief, a second relief is formed by beveling the spherical crown, wherein the second relief radially adjoins the first relief and circumferentially adjoins a remaining pin face in the shape of the spherical crown.
    Type: Grant
    Filed: September 16, 2020
    Date of Patent: November 30, 2021
    Assignee: Eaton Intelligent Power Limited
    Inventors: Jason M. Jensen, Matthew A. Vance, Douglas R. Cornett
  • Patent number: 11181018
    Abstract: A Type II valvetrain and engine brake arrangement includes a brake housing defining a hydraulic circuit and a follower piston chamber and a brake piston chamber. A follower piston in the follower piston chamber is configured to follow a rotating brake cam lobe. A brake piston in the brake piston chamber is in pressure responsive relation with the follower piston to move. A finger follower is disposed so that a brake rod coupled to the brake piston engages the finger follower at least when the brake piston is in an activated position. When the brake piston is the activated position, the finger follower pivots from a first end about a pivot as the finger follower follows a valve cam lobe to effect lifting and seating of a cylinder valve. When the brake piston is activated, the finger follower, at least in part, pivots from the first end about the pivot and the brake rod lifts the cylinder valve and released compression from the engine cylinder.
    Type: Grant
    Filed: February 25, 2021
    Date of Patent: November 23, 2021
    Assignee: DEERE & COMPANY
    Inventors: Neil S. Erickson, John Mandell
  • Patent number: 11181013
    Abstract: A novel cylinder head arrangement for an in-line four cylinder or eight cylinder engine. A modified arrangement allows additional space for installation of wider rocker arm assemblies used for variable valve lift (VVL), cylinder deactivation (CDA) and other types of variable valve actuation (VVA). In one embodiment, cam towers adjacent the end two cylinders are not used. At least one end support is used, which may be an outboard bearing on a camshaft for each end. The wider rocker assemblies may then be installed. In another embodiment, cam towers adjacent the inner two cylinders are eliminated and a single camshaft support piece with a support bearing is installed between the inner cylinders to provide support for the camshafts. The wider rocker assemblies may then be installed on at least one of the middle cylinders. A novel oil control valve operates latches in switching rocker arm assemblies.
    Type: Grant
    Filed: September 4, 2018
    Date of Patent: November 23, 2021
    Assignee: Eaton Intelligent Power Limited
    Inventors: David Gerard Genise, Andrei Dan Radulescu
  • Patent number: 11162392
    Abstract: A valve operating device, in particular for an internal combustion engine, has a camshaft, a cam unit mounted in an axially moveably manner on the camshaft, and an actuator unit which has an actuator for displacing the cam unit on the camshaft. The actuator is periodically mechanically forcibly decoupled during operation.
    Type: Grant
    Filed: August 17, 2018
    Date of Patent: November 2, 2021
    Assignee: Daimler AG
    Inventors: Thomas Stolk, Alexander Von Gaisberg-Helfenberg
  • Patent number: 11162398
    Abstract: A cam having at least two part cams are arranged axially behind one another along a longitudinal axis includes an undercut between the cam parts. The part cams have running faces which lie radially on the outside of the part cams and have different variable running face contours. The undercut has a profile with a variable contour which is dependent in each case on that adjacent running face contour which is at a smaller radial spacing from the longitudinal axis than the other running face contour.
    Type: Grant
    Filed: June 11, 2020
    Date of Patent: November 2, 2021
    Assignee: Neumayer Tekfor Engineering GmbH
    Inventor: Daniel Schoener
  • Patent number: 11143059
    Abstract: A tappet assembly including an outer cup having a substantially cylindrical side wall, an annular lip portion disposed at a first end of the side wall, and an annular ledge disposed on the side wall, the annular ledge being disposed in a plane that is transverse to a longitudinal center axis of the tappet assembly. An inner cup includes an annular lip extending outwardly therefrom and a pair of shaft apertures, and is disposed in the outer cup so that the lip abuts the annular ledge of the outer cup and is non-rotatably fixed thereto by the annular lip of the outer cup which abuts the lip of the inner cup. A shaft is received in the shaft apertures, and a roller tappet is rotatably received on the shaft such that a portion of the roller tappet extends axially outwardly beyond the annular lip portion of the outer cup, and an anti-rotation feature formed in the outer cup, wherein the outer surface of the outer cup is an unground surface.
    Type: Grant
    Filed: October 5, 2020
    Date of Patent: October 12, 2021
    Assignee: Koyo Bearings North America LLC
    Inventors: Scott Abrahamson, Mark Brandolin
  • Patent number: 11143064
    Abstract: In an electromagnetic latch assembly of a type that includes an armature, an electromagnet operative to actuate the armature, a latch pin, and a rigid metal structure that supports both the electromagnet and the latch pin, the latch pin is attached to the armature through a bendable connection. The electromagnet may be mounted to or housed within the metal structure. The latch pin may protrude from the rigid metal structure and may be guided by the metal structure. The bendable connection couples translation of the armature to translation of the latch pin while allowing the two parts to move independently to some degree. The bendable connection may reduce forces on the armature that could cause the armature to bend or stick. Those forces may result from misalignment between the latch pin and the armature or from the latch pin being driven off axis under load.
    Type: Grant
    Filed: August 12, 2020
    Date of Patent: October 12, 2021
    Assignee: Eaton Intelligent Power Limited
    Inventors: Austin Robert Zurface, Dale Arden Stretch, Brian Karl Vandeusen
  • Patent number: 11131222
    Abstract: A valve actuation system comprises a first motion transfer mechanism operatively connected to a first valve actuation motion source and to the at least one engine valve, a second motion transfer mechanism operatively connected to a second valve actuation motion source; and a selectable coupling mechanism between the first and second motion transfer mechanisms. The coupling mechanism is operable in a first state where first valve actuation motions are conveyed to the at least one engine valve via the first motion transfer mechanism, and a second state where second valve actuation motions are additionally conveyed to the at least one engine valve via the second motion transfer mechanism, the coupling mechanism and the first motion transfer mechanism. During a handoff between the first and second valve actuation motions or vice versa, a difference in valve actuation velocities of the first and second valve actuation motions does not exceed a threshold.
    Type: Grant
    Filed: February 19, 2021
    Date of Patent: September 28, 2021
    Assignee: Jacobs Vehicle Systems, Inc.
    Inventors: John A. Schwoerer, Justin D. Baltrucki
  • Patent number: 11125125
    Abstract: A valvetrain includes a rocker arm assembly and a power transfer module that provides power to the rocker arm assembly. The power transfer module includes a mounting frame that positions a resilient contact to abut and slide over a corresponding contact on the rocker arm assembly thereby maintain an electrical connection to the rocker arm assembly during rocker arm assembly operation. In some embodiments the structure facilitates retention of the rocker arm assembly on a pivot. The contact on the rocker arm may be provided by a contact pin. The mounting frame may abut and/or go around a pivot for the rocker arm assembly. A contact frame on the rocker arm may hold conductors of the electrical circuit extending from the contacts.
    Type: Grant
    Filed: November 8, 2019
    Date of Patent: September 21, 2021
    Assignee: Eaton Intelligent Power Limited
    Inventors: Jiri Cecrle, Dale Arden Stretch, Michael J. Campbell
  • Patent number: 11078810
    Abstract: A rocker arm comprises a first outer arm and a second outer arm joined by a pivot body, the first outer arm comprising an inner side, the inner side comprising a limiting surface. An actuatable latch mechanism is within the pivot body. A first inner arm and a second inner arm are joined by a latch arm. An axle joins the first inner arm and the second inner arm to pivot between the first outer arm and the second outer arm. A second axle is between the first inner arm and the second inner arm. A pin extends from the second axle towards the first outer arm, and the pin is configured to pivot towards and away from the limiting surface when the first inner arm and the second inner arm pivot between the first outer arm and the second outer arm.
    Type: Grant
    Filed: October 9, 2017
    Date of Patent: August 3, 2021
    Assignee: Eaton Intelligent Power Limited
    Inventors: Matthew A. Vance, Dale Arden Stretch
  • Patent number: 11066963
    Abstract: An internal combustion engine includes, as a lost motion spring that urges a rocker arm toward a cam, a compression coil spring supported on a cylinder head. A shaft is located on an inner side of the compression coil spring and extends along a winding axis of the compression coil spring. The internal combustion engine significantly reduces or prevents a decrease in the fuel efficiency and an increase in the size of the variable valve mechanism, while surging is unlikely to occur while running at a high speed, and it is possible to reduce the size or the weight of the rocker arm.
    Type: Grant
    Filed: April 27, 2018
    Date of Patent: July 20, 2021
    Assignee: YAMAHA HATSUDOKI KABUSHIKI KAISHA
    Inventor: Yasuo Okamoto
  • Patent number: 11060427
    Abstract: A valve train arrangement including at least one exhaust valve and a reverse-spring hydraulic lash adjuster (RSHLA) is provided. The RSHLA has a predetermined closing velocity. An engine brake system is configured to engage the exhaust valve, such that: (i) upon activation of the engine brake system, the engine brake system engages the at least one exhaust valve to open the at least one exhaust valve; and (ii) upon deactivation of the engine brake system, the engine brake system disengages the at least one exhaust valve such that the at least one exhaust valve is closed. A deactivation velocity of the engine brake system is less than the predetermined closing velocity of the RSHLA.
    Type: Grant
    Filed: June 24, 2019
    Date of Patent: July 13, 2021
    Assignee: SCHAEFFLER TECHNOLOGIES AG & CO. KG
    Inventor: Eric Berndt
  • Patent number: 11060426
    Abstract: A switching finger follower for an engine valve train utilizes an adjustable support assembly that eliminates potential for partial engagement during operation. A lever engagement member or latch is disposed for movement on the follower body and interacts with a lever to provide a constant contact geometry. The finger follower may be configured as a lost motion device and may include a biasing assembly and a travel limiter. The latch may support the lever in at least one precise position and may support the lever in a second position for partial lost motion, or permit the lever to pivot free of the latch for complete lost motion, as in cylinder deactivation applications.
    Type: Grant
    Filed: December 6, 2019
    Date of Patent: July 13, 2021
    Assignee: JACOBS VEHICLE SYSTEMS, INC.
    Inventors: John Mandell, Justin D. Baltrucki, David M. Ferreira
  • Patent number: 11047268
    Abstract: An actuator arrangement for controlling a first latching arrangement of a first dual body rocker arm for controlling an intake valve of an internal combustion engine, and for controlling a second latching arrangement of a second dual body rocker arm for controlling an exhaust valve of the internal combustion engine, the first and second dual body rocker arms each including a first body, a second body, and the latching arrangement controllable to latch and unlatch the first body and the second body. The actuator arrangement includes: an actuation source; and an actuation transmission arrangement for transmitting movement of the actuation source to both the first latching arrangement and the second latching arrangement. In use, movement of the actuation source causes, via the actuation transmission arrangement, control of the first latching arrangement and of the second latching arrangement in common.
    Type: Grant
    Filed: July 7, 2018
    Date of Patent: June 29, 2021
    Assignee: EATON INTELLIGENT POWER LIMITED
    Inventor: Majo Cecur
  • Patent number: 11022008
    Abstract: An exhaust valve rocker arm assembly operable in a combustion engine mode and an engine braking mode, the exhaust valve rocker arm assembly selectively opening first and second exhaust valves and including a rocker shaft, exhaust valve rocker arm assembly and a ball engine brake mechanism. The exhaust valve rocker arm assembly has an exhaust rocker arm that receives the rocker shaft and is configured to rotate around the rocker shaft. The ball engine brake mechanism is configured on the exhaust rocker arm and selectively actuates a valve plunger causing an exhaust valve to perform engine braking. The ball engine brake mechanism includes a capsule assembly having a capsule, a biasing member and a ball. The capsule has a cylindrical body that extends between a first end having an actuation face and a second end having a spring return face.
    Type: Grant
    Filed: February 20, 2020
    Date of Patent: June 1, 2021
    Assignee: Eaton Intelligent Power Limited
    Inventor: Mark VanWingerden
  • Patent number: 11015493
    Abstract: An exhaust valve rocker arm assembly operable in a combustion engine mode and an engine braking mode includes: a rocker shaft that defines a pressurized oil supply conduit; a rocker arm that receives the rocker shaft and rotates around the rocker shaft, the rocker arm including a rocker arm oil supply passage defined in the rocker arm; a valve bridge for engaging a first exhaust valve and a second exhaust valve; a hydraulic lash adjuster assembly, disposed on the rocker arm, including a first plunger body movable between a first position and a second position; and a check valve, disposed on the rocker arm, including an actuator for selectively releasing pressure in the hydraulic lash adjuster assembly. In the engine braking mode, by rotation of the rocker arm the pressurized oil supply conduit is brought into fluid communication with the rocker arm oil supply passage.
    Type: Grant
    Filed: February 27, 2020
    Date of Patent: May 25, 2021
    Assignee: EATON INTELLIGENT POWER LIMITED
    Inventor: Majo Cecur
  • Patent number: 11015492
    Abstract: A method of operating a rocker arm assembly in a cylinder deactivation mode according to one example of the present disclosure includes providing a two-step variable valve lift rocker arm assembly and a deactivating lash adjuster. Operation of the rocker arm assembly in cylinder deactivation mode is selected. The rocker arm assembly is operated in low-lift mode based on the selection of the cylinder deactivation mode. Subsequent to or concurrently with operating the rocker arm assembly in the low-lit mode, the deactivating lash adjuster is operated in the unlatched mode. A first amount of the total lost motion required for cylinder deactivation mode is accounted for by lost motion of the rocker arm assembly operating in the low-lift mode and a remainder amount of the total lost motion is accounted for by lost motion of the deactivating lash adjuster operating in the unlatched mode.
    Type: Grant
    Filed: February 25, 2020
    Date of Patent: May 25, 2021
    Assignee: Eaton Intelligent Power Limited
    Inventor: Dale Arden Stretch
  • Patent number: 11008900
    Abstract: A valvetrain for an internal combustion engine of the type that has a combustion chamber, a moveable valve having a seat formed in the combustion chamber, and a camshaft includes a rocker arm assembly, a pivot providing a fulcrum for a rocker arm of the rocker arm assembly, and a latch assembly. An electrical device mounted to the rocker arm assembly receives power or communicates through a circuit that includes an electrical connection formed by abutment between surfaces of two distinct parts. The rocker arm assembly is operative to move one of the two abutting surfaces relative to the other in response to actuation of the cam follower. Forming an electrical connection through abutting surfaces that are free to undergo relative motion may reduce or eliminate the need to run wires to a mobile portion of the rocker arm assembly.
    Type: Grant
    Filed: June 5, 2020
    Date of Patent: May 18, 2021
    Assignee: Eaton Intelligent Power Limited
    Inventors: Petr Liskar, Jiri Cecrle, Dale Arden Stretch, Michael J. Campbell, Tomas Drabek, James Edward McCarthy, Jr., Austin Robert Zurface, Robert Philip Benjey, Eric John Yankovic, Brian Karl Vandeusen, Nicholas Peter Gillette, Michael James Stanton, Thomas Michael Tembreull, Anthony Leon Spoor
  • Patent number: 11008905
    Abstract: A variable valve apparatus includes: a swing body mounted to rotate to open and close a valve; an inner body driven by a cam and mounted in the swing body so as to switch a relatively-rotatable state and a latched state with respect to the swing body; a latching pin slidably mounted in the swing body so as to switch the latched state and the relatively-rotatable state of the inner body with respect to the swing body; and a control mechanism pressing the latching pin to make the inner body be latched to the swing body.
    Type: Grant
    Filed: November 14, 2019
    Date of Patent: May 18, 2021
    Assignees: HYUNDAI MOTOR COMPANY, KIA CORPORATION
    Inventors: Myung Sik Choi, You-Seok Back
  • Patent number: 11008901
    Abstract: A rocker arm assembly having a rocker arm with a first end defining a first cavity, a second end opposite the first end, a bore positioned between the first end and the second end for pivotally mounting the rocker arm within an engine, and an oil passage extending from the bore to the cavity. A hydraulic lash adjuster is positioned within the cavity and has an oil inlet in fluid communication with the oil passage. The rocker arm has a vent passage configured to place the oil inlet in fluid communication with an area exterior to the rocker arm.
    Type: Grant
    Filed: November 22, 2019
    Date of Patent: May 18, 2021
    Assignee: Caterpillar Inc.
    Inventors: Ashwin A. Hattiangadi, Charles F. Coffey