WO2020177925A1 - Système de désactivation de cylindre et dispositif de commande de soupapes comprenant un tel système - Google Patents

Système de désactivation de cylindre et dispositif de commande de soupapes comprenant un tel système Download PDF

Info

Publication number
WO2020177925A1
WO2020177925A1 PCT/EP2020/025103 EP2020025103W WO2020177925A1 WO 2020177925 A1 WO2020177925 A1 WO 2020177925A1 EP 2020025103 W EP2020025103 W EP 2020025103W WO 2020177925 A1 WO2020177925 A1 WO 2020177925A1
Authority
WO
WIPO (PCT)
Prior art keywords
outer body
rocker arm
capsule
cda
plunger
Prior art date
Application number
PCT/EP2020/025103
Other languages
English (en)
Inventor
Nikhil Saggam
Pritam EDKE
Original Assignee
Eaton Intelligent Power Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Eaton Intelligent Power Limited filed Critical Eaton Intelligent Power Limited
Publication of WO2020177925A1 publication Critical patent/WO2020177925A1/fr
Priority to US17/462,473 priority Critical patent/US20210396164A1/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/18—Rocking arms or levers
    • F01L1/181—Centre pivot rocking arms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/0005—Deactivating valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/18—Rocking arms or levers
    • F01L1/185—Overhead end-pivot rocking arms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/26—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of two or more valves operated simultaneously by same transmitting-gear; peculiar to machines or engines with more than two lift-valves per cylinder
    • F01L1/267—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of two or more valves operated simultaneously by same transmitting-gear; peculiar to machines or engines with more than two lift-valves per cylinder with means for varying the timing or the lift of the valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/06—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for braking
    • F01L13/065—Compression release engine retarders of the "Jacobs Manufacturing" type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—Camshafts
    • F01L1/053—Camshafts overhead type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/20—Adjusting or compensating clearance
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/18—Rocking arms or levers
    • F01L2001/186—Split rocking arms, e.g. rocker arms having two articulated parts and means for varying the relative position of these parts or for selectively connecting the parts to move in unison
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/0005—Deactivating valves
    • F01L2013/001—Deactivating cylinders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L2013/10—Auxiliary actuators for variable valve timing
    • F01L2013/105—Hydraulic motors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2305/00—Valve arrangements comprising rollers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2307/00—Preventing the rotation of tappets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2810/00—Arrangements solving specific problems in relation with valve gears
    • F01L2810/02—Lubrication

Definitions

  • the present disclosure relates generally to a rocker arm assembly for use in a valve train assembly and, more particularly, to a rocker arm assembly having a cylinder deactivation mechanism.
  • Compression engine brakes can be used as auxiliary brakes, in addition to wheel brakes, on relatively large vehicles, for example trucks, powered by heavy or medium duty diesel engines.
  • a compression engine braking system is arranged, when activated, to provide an additional opening of an engine cylinder’s exhaust valve when the piston in that cylinder is near a top-dead-center position of its compression stroke so that compressed air can be released through the exhaust valve. This causes the engine to function as a power consuming air compressor which slows the vehicle.
  • the exhaust valve is actuated by a rocker arm which engages the exhaust valve by means of a valve bridge.
  • the rocker arm rocks in response to a cam on a rotating cam shaft and presses down on the valve bridge which itself presses down on the exhaust valve to open it.
  • a hydraulic lash adjuster may also be provided in the valve train assembly to remove any lash or gap that develops between the components in the valve train assembly.
  • a cylinder deactivation (CDA) capsule for a valvetrain assembly having at least one rocker arm.
  • the CDA capsule includes an outer body having at least one slot formed therein, the outer body configured to be coupled to the rocker arm, and an inner plunger at least partially received within the outer body and having at least one outwardly extending tab.
  • the inner plunger is configured to translate within the outer body, and the at least one outwardly extending tab is received within the at least one slot to facilitate preventing rotation of the inner plunger relative to the outer body.
  • the CDA capsule is movable between an activated position where the CDA capsule is configured to transfer motion from a camshaft, and a deactivated position where the CDA capsule is configured to absorb the motion from the camshaft.
  • the described CDA capsule may include one or more of the following features: a latching mechanism operably associated between the outer body and the inner plunger, the latching mechanism selectively movable between a latched position that facilitates preventing relative movement between the plunger and the outer body, and an unlatched position that facilitates movement between the plunger and the outer body; wherein the latching mechanism includes a pair of opposed pins and a biasing mechanism disposed therebetween; and wherein each opposed pin includes a pin shoulder configured to abut against a shoulder of the outer body when the latching mechanism is in the latched position.
  • the described CDA capsule may include one or more of the following features: wherein the outer body includes a fluid port configured to provide a supply of fluid to the opposed pins to move the latching mechanism from the latched position to the unlatched position; wherein the outer body includes a fluid communication groove formed therein, the fluid communication groove in fluid communication with the fluid port; a biasing mechanism disposed between the plunger and the outer body, the biasing mechanism configured to absorb motion of the plunger within the outer body when the latching mechanism is in the unlatched position, to thereby provide a lost motion feature; wherein the biasing mechanism comprises a first spring and a second spring; and wherein the at least one slot comprises a pair of diametrically opposed slots, wherein the at least one outwardly extending tab comprises a pair of diametrically opposed outwardly extending tabs, and wherein the outwardly extending tabs are received within the slots to prevent relative rotation between the inner plunger and the outer body.
  • a rocker arm assembly for a valvetrain assembly includes a rocker arm configured to rotate about a rocker shaft and having a valve side end configured to selectively engage an engine valve, and a cam side end configured to be selectively engaged by a camshaft.
  • a cylinder deactivation (CDA) capsule is coupled to the cam side end and is movable between an activated position where the CDA capsule transfers motion from the camshaft to the engine valve, and a deactivated position where the CDA capsule absorbs the motion from the camshaft without transferring said motion to the engine valve.
  • the described rocker arm assembly may include one or more of the following features: wherein the rocker arm valve side end includes a mechanical lash adjuster assembly; and wherein the CDA capsule includes an outer body having at least one slot formed therein, and an inner plunger at least partially received within the outer body and having at least one outwardly extending tab, the inner plunger configured to translate within the outer body, wherein the at least one outwardly extending tab is received within the at least one slot to facilitate preventing rotation of the inner plunger relative to the outer body.
  • the described rocker arm assembly may include one or more of the following features: wherein the CDA capsule is at least partially disposed within a bore formed in the rocker arm cam side end; wherein a groove is formed in an inner wall of the rocker arm that defines the bore, and wherein the at least one outwardly extending tab is received within the groove to further facilitate preventing rotation of the inner plunger and the outer body within the bore relative to the rocker arm; and wherein the at least one slot comprises a pair of diametrically opposed slots, wherein the at least one outwardly extending tab comprises a pair of diametrically opposed outwardly extending tabs, and wherein the outwardly extending tabs are received within the slots to facilitate preventing relative rotation between the inner plunger and the outer body.
  • the described rocker arm assembly may include one or more of the following features: a latching mechanism operably associated between the outer body and the inner plunger, the latching mechanism selectively movable between a latched position that facilitates preventing relative movement between the plunger and the outer body, and an unlatched position that facilitates movement between the plunger and the outer body; and wherein the latching mechanism includes a pair of opposed pins and a biasing mechanism disposed therebetween, and wherein each opposed pin includes a pin shoulder configured to abut against a shoulder of the outer body when the latching mechanism is in the latched position.
  • the described rocker arm assembly may include one or more of the following features: wherein the outer body includes a fluid port configured to provide a supply of fluid to the opposed pins to move the latching mechanism from the latched position to the unlatched position, and wherein the outer body includes a fluid communication groove formed therein, the fluid communication groove in fluid communication with the fluid port; and a biasing mechanism disposed between the plunger and the outer body, the biasing mechanism configured to absorb motion of the plunger within the outer body when the latching mechanism is in the unlatched position, to thereby provide a lost motion feature.
  • a rocker arm assembly for a valvetrain assembly includes a rocker arm configured to rotate about a rocker shaft and having a valve side end configured to selectively engage an engine valve, and a cam side end configured to be selectively engaged by a camshaft.
  • a cylinder deactivation (CDA) capsule is coupled to the cam side end and includes an outer body having at least one slot formed therein, the outer body configured to be coupled to the rocker arm, and an inner plunger at least partially received within the outer body and having at least one outwardly extending tab.
  • the inner plunger is configured to translate within the outer body, and the at least one outwardly extending tab is received within the at least one slot and a groove formed in the rocker arm to facilitate preventing rotation of the inner plunger and outer body relative to the rocker arm.
  • the CDA capsule is movable between an activated position where the CDA capsule is configured to transfer motion from the camshaft to the engine valve, and a deactivated position where the CDA capsule is configured to absorb the motion from the camshaft.
  • FIG. 1 is a perspective view of a deactivating exhaust rocker arm constructed in accordance to one example of the present disclosure
  • FIG. 2 is a perspective view of an example deactivating capsule of the exhaust rocker arm shown in FIG. 1 ;
  • FIG. 3 is a perspective view of an example outer body of the deactivating capsule shown in FIG. 2;
  • FIG. 4 is a perspective view of an example inner plunger of the deactivating capsule shown in FIG. 2;
  • FIG. 5 is a cross-sectional view of the deactivating exhaust rocker arm shown in FIG. 1 and taken along line 5-5;
  • FIG. 6 is a cross-sectional view of the deactivating capsule shown in FIG. 2, taken along line 6-6 and shown in an example latched position;
  • FIG. 7 is a cross-sectional view of the deactivating capsule shown in FIG. 6, in an example unlatched position.
  • FIG. 8 is a cross-sectional view of the deactivating capsule shown in
  • FIG. 6 in the unlatched position and exhibiting lost motion.
  • HD diesel engines require high braking power, in particular at low engine speed.
  • Some HD diesel engines are configured with valvetrains having a valve bridge and include with single overhead cam (SOHC) and overhead valve (OHV) valvetrain.
  • SOHC single overhead cam
  • OOV overhead valve
  • the present disclosure incorporates mechanisms that allow for selective activation and deactivation of a rocker arm. In the deactivated state, the rocker arm may exhibit lost motion. In the activated state, the rocker arm may open one exhaust valve to perform a braking event. Additionally, anti-rotation features can be provided for the mechanisms to prevent rotation relative to the rocker arm.
  • an engine brake rocker arm assembly for a Type III valvetrain assembly is shown and generally identified at reference 10. It will be appreciated that while shown in a Type III arrangement, it is within the scope of the present disclosure for the various features described herein to be used in other arrangements.
  • the engine brake rocker arm assembly 10 includes an exhaust valve rocker arm assembly 12 configured to be incorporated in a valvetrain assembly that utilizes engine braking such as one having a pair of three- cylinder bank portions in a six-cylinder engine. It will be appreciated however that the present teachings are not so limited. In this regard, the present disclosure may be used in any valvetrain assembly.
  • the valvetrain assembly is supported in a valvetrain carrier (not specifically shown) and can include two rocker arms per cylinder.
  • each cylinder includes an exhaust valve rocker arm assembly 12 and an intake valve rocker arm assembly (not shown).
  • the exhaust valve rocker arm assembly 12 is configured to control motion of exhaust valves of an associated engine, for example during operation in an engine braking mode.
  • the intake valve rocker arm assembly is configured to control opening of intake valves of the engine.
  • exhaust valve rocker arm assembly 12 utilizes a cam-side cylinder deactivating (CDA) capsule configured to be selectively deactivated to prevent actuation of an exhaust valve.
  • CDA cam-side cylinder deactivating
  • the exhaust valve rocker arm assembly 12 can include an exhaust rocker arm 14 that rotates about a rocker shaft 16, a valve bridge 18, and a CDA capsule 20.
  • the valve bridge 18 is configured to engage first and second exhaust valves 24, 26 associated with a cylinder of the engine and may be selectively actuated via an additional rocker arm (not shown).
  • the first exhaust valve 24 is biased by a valve spring 28, and the second exhaust valve 26 is biased by a valve spring 30.
  • the exhaust rocker arm 14 rotates around the rocker shaft 16 based on a lift profile or cam lobe 32 of a cam shaft 34, as described herein in more detail, and a pass through pin 36 is positioned on the valve bridge 18 to enable actuation of exhaust valve 26 without actuation of valve bridge 18 or first exhaust valve 24.
  • the cam lobe 32 is configured to drive a first end 38 of the exhaust rocker arm 14, which pivots the rocker arm 14 about the fixed cam shaft 34, thereby causing a second end 42 of the exhaust rocker arm 14 to press the pass through pin 36, for example to perform an engine braking operation.
  • rocker arm 14 may be a standalone rocker arm and/or act on the center of the bridge 18 to provide a standard valve lift of exhaust valves 24 and/or 26.
  • the rocker arm second end 42 includes a mechanical lash adjuster assembly 44 that generally includes a lash adjustment screw 46, a nut 48, and an e-foot 50.
  • the lash adjustment screw 46 includes a first end 52 and an opposite second end 54 and extends through a bore 56 formed in the rocker arm second end 42.
  • the nut 48 is threadably coupled to the first end 52, and the e- foot 50 is coupled to the second end 54.
  • the valve lash set at a contact point of the bridge 18 (e.g., pin 36) may be adjusted by rotating the nut 48.
  • CDA capsule 20 is utilized in a diesel engine in order to increase exhaust temperature for exhaust thermal management when the exhaust is below a predetermined temperature, and improve engine fuel efficiency during low load operation.
  • CDA capsule 20 is disposed at least partially within a bore 60 (FIG. 5) formed within the rocker arm cam-side first end 38 and can generally include an outer body 70, an inner plunger 72, a latch or latching mechanism 74, and a contacting element or roller 76.
  • the outer body 70 is generally cylindrical and includes a first end 78 and an opposite second end 80.
  • the outer body 70 also includes an oil communication groove 82 in fluid communication with a plurality of oil ports 84 via a plurality of oil channels 86.
  • a pair of diametrically opposed slots 88 are formed in the outer body 70 and configured to receive portions of the inner plunger 72 to prevent rotation of the inner plunger 72 within the outer body 70, as described herein in more detail.
  • the outer body 70 is threaded onto the rocker arm 14 up to a predetermined length such that slots 88 are aligned or substantially aligned with grooves 62 formed within an inner wall 64 of the rocker arm 14 that defines the bore 60 and relative to rocker arm 14.
  • the inner plunger 72 is generally cylindrical and includes a main body 90 having a pair of diametrically opposed tabs 92, a plurality of oil passages 94, and a pair of flanges or arms 96. As shown in FIG. 2, the inner plunger 72 is disposed at least partially within outer body 70 such that the tabs 92, which extend outwardly from the main body 90, are received within the outer body opposed slots 88. Moreover, as shown in FIG. 5, the tabs 92 are received within the grooves 62. In this way, the inner plunger 72 is configured to prevent rotation of both the outer body 70 and the inner plunger 72 within the bore 60.
  • inner plunger 72 is configured to selectively slide within the outer body 70 when CDA capsule 20 is in an unlatched position, as described herein in more detail.
  • the oil passages 94 are configured to selectively align with oil ports 84 to enable fluid communication therebetween, and the arms 96 each include an aperture 98 to receive an axle 100 (FIG. 2) for rotatably supporting roller 76 between the opposed arms 96.
  • inner plunger 72 defines a cavity 1 10 to receive one or more biasing mechanisms 1 12 (e.g., a spring) such that biasing mechanism 1 12 is seated between the plunger main body 90 and a cap 1 14.
  • a nut 1 16 is secured to the outer body first end 78 and is configured as a stopping feature to limit upward movement of inner plunger 72 a predetermined distance.
  • the biasing mechanism 1 12 is configured to bias the inner plunger 72 outward from the outer body 70 and absorb upward motion of cam lobe 32 when CDA capsule 20 is in the unlatched position, thereby providing a lost motion feature.
  • an activated or latched position FIG.
  • the CDA capsule 20 acts as a unitary body and transfers motion from the cam lobe 32 to the first end 38 of the exhaust rocker arm 14 via roller 76.
  • the CDA capsule 20 is in the deactivated or unlatched position (FIG. 7)
  • upward movement of cam lobe 32 causes the inner plunger 72 to slide upward within outer body 70, as shown in FIG. 8.
  • the biasing mechanism 1 12 subsequently absorbs the upward motion of cam lobe 32 without transferring said motion to the rocker arm 14.
  • the latching mechanism 74 is configured to selectively move between the latched position (FIG. 6) and the unlatched position (FIG. 7). In the latched position, inner plunger 72 is prevented from movement relative to the outer body 70. In the unlatched position, inner plunger 72 is movable within and relative to the outer body 70.
  • latching mechanism 74 is disposed within a latch cavity 1 18 of the inner plunger 72 and generally includes a pair of opposed pins 120 having a biasing mechanism (e.g., a spring) 122 arranged therebetween.
  • the biasing mechanism 122 is configured to bias pins 120 away from each other and outward toward outer body 70.
  • biasing mechanism 122 biases pins 120 outward such that a shoulder 124 of each pin 120 is disposed adjacent a shoulder 126 of outer body 70. In this way, upward movement of inner plunger 72 is prevented by pin shoulder 124 abutting against outer body shoulder 126, and the upward movement is transferred to outer body 70 and thus rocker arm 14.
  • an oil control valve (OCV, not shown) provides a supply of oil to oil ports 84.
  • OCV oil control valve
  • the force of the supplied oil against pins 120 overcomes the biasing force of biasing mechanism 122, and the pins 120 move toward each other, as shown in FIG. 7.
  • pin shoulders 124 are moved out of engagement with outer body shoulders 126, thereby enabling upward movement of plunger 72 within outer body 70 where biasing mechanism 1 12 subsequently absorbs the upward motion of cam lobe 32 and prevents transfer of the motion to the rocker arm 14, as shown in FIG. 8.
  • a lubrication passage 128 is formed in the inner plunger 72 and is fluidly coupled to the latch cavity 1 18 to selectively provide lubrication to the roller 76 and axle 100.
  • latching mechanism 74 can have various configurations that enable rocker arm assembly 10 to function as described herein.
  • latching mechanism 74 can include an electromagnetic actuator (not shown) configured to receive a controller signal to selectively retract and deploy a latching device (e.g., pins 120) to enable and disable the CDA function, thereby obviating a hydraulic system and OCV.
  • the systems include a CDA capsule disposed on a cam-side of the rocker arm. Additionally, the CDA capsule can include anti-rotation features to prevent rotation of one or more CDA capsule components within and relative to the rocker arm. Because for some diesel engines, the injectors are placed very close to the rocker arms, it can be difficult to use a capsule for deactivation on the valve side. Accordingly, the present assembly provides a deactivation capsule installation on the cam side to achieve deactivation for such diesel engines.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)

Abstract

Dans la présente invention, un ensemble culbuteur comprend un culbuteur configuré pour tourner autour d'un arbre de culbuteur et ayant une extrémité côté soupape configurée pour venir en prise de manière sélective avec une soupape de moteur, et une extrémité côté came configurée pour être sélectivement mise en prise par un arbre à cames. Une capsule de désactivation de cylindres (CDA) est couplée à l'extrémité côté came et comprend un corps externe ayant au moins une fente formée à l'intérieur de celui-ci, le corps externe étant configuré pour être couplé au culbuteur, et un piston interne au moins partiellement reçu à l'intérieur du corps externe et ayant au moins une languette s'étendant vers l'extérieur. Le piston interne est configuré pour se déplacer en translation à l'intérieur du corps externe, et l'au moins une languette s'étendant vers l'extérieur est reçue à l'intérieur de l'au moins une fente et une rainure formée dans le culbuteur afin de faciliter la prévention de la rotation du piston interne et du corps externe par rapport au culbuteur.
PCT/EP2020/025103 2019-03-01 2020-02-28 Système de désactivation de cylindre et dispositif de commande de soupapes comprenant un tel système WO2020177925A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US17/462,473 US20210396164A1 (en) 2019-03-01 2021-08-31 Type iii cam side cylinder deactivation

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN201911008098 2019-03-01
IN201911008098 2019-03-01

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US17/462,473 Continuation US20210396164A1 (en) 2019-03-01 2021-08-31 Type iii cam side cylinder deactivation

Publications (1)

Publication Number Publication Date
WO2020177925A1 true WO2020177925A1 (fr) 2020-09-10

Family

ID=69804802

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2020/025103 WO2020177925A1 (fr) 2019-03-01 2020-02-28 Système de désactivation de cylindre et dispositif de commande de soupapes comprenant un tel système

Country Status (2)

Country Link
US (1) US20210396164A1 (fr)
WO (1) WO2020177925A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19604866A1 (de) * 1996-02-10 1997-08-14 Schaeffler Waelzlager Kg Schaltbares Abstützelement für einen Schlepphebeltrieb einer Brennkraftmaschine
EP1526255A2 (fr) * 2003-10-20 2005-04-27 Delphi Technologies, Inc. Poussoir désactivable anti-vidage
WO2017053867A1 (fr) * 2015-09-25 2017-03-30 Eaton Corporation Ensemble de support de dispositif de commande de soupapes

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19604866A1 (de) * 1996-02-10 1997-08-14 Schaeffler Waelzlager Kg Schaltbares Abstützelement für einen Schlepphebeltrieb einer Brennkraftmaschine
EP1526255A2 (fr) * 2003-10-20 2005-04-27 Delphi Technologies, Inc. Poussoir désactivable anti-vidage
WO2017053867A1 (fr) * 2015-09-25 2017-03-30 Eaton Corporation Ensemble de support de dispositif de commande de soupapes

Also Published As

Publication number Publication date
US20210396164A1 (en) 2021-12-23

Similar Documents

Publication Publication Date Title
US11821344B2 (en) Engine braking castellation mechanism
US11255229B2 (en) Integrated engine brake configuration
US10774694B2 (en) Valve train carrier assembly
CN113803127B (zh) 摇臂组合件
CN113474540B (zh) 具有用于汽缸停用和引擎制动构型的间隙管理的摇臂组件
WO2016118548A1 (fr) Ensemble culbuteur pour freinage de moteur
CN113167137B (zh) 用于引擎制动的摇臂组件
WO2020221477A1 (fr) Frein moteur hydraulique apparié de type ii
US11506092B2 (en) Engine brake rocker arm having biasing configuration
US20210396164A1 (en) Type iii cam side cylinder deactivation
US10619528B2 (en) Compression brake for internal combustion engine
US20210095584A1 (en) Switching roller finger follower for bleeder braking
US11828205B2 (en) Latch assembly and compact rocker arm assembly
US10927724B2 (en) Rocker arm assembly
US12071867B2 (en) Rocker arm assembly with valve bridge
US11859519B2 (en) Lash setting features for castellation mechanism
CN117642550A (zh) 具有主摇杆和分叉辅助摇杆的摇臂组件
WO2020211981A1 (fr) Ensemble culbuteur doté d'une capsule de ressort à mouvement perdu

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 20710763

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 20710763

Country of ref document: EP

Kind code of ref document: A1