EP3245390A1 - Dispositif anti-rotation de soupapes de moteur - Google Patents

Dispositif anti-rotation de soupapes de moteur

Info

Publication number
EP3245390A1
EP3245390A1 EP16737880.1A EP16737880A EP3245390A1 EP 3245390 A1 EP3245390 A1 EP 3245390A1 EP 16737880 A EP16737880 A EP 16737880A EP 3245390 A1 EP3245390 A1 EP 3245390A1
Authority
EP
European Patent Office
Prior art keywords
guide plug
roller lifter
engine
peripheral surface
receiving channel
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP16737880.1A
Other languages
German (de)
English (en)
Other versions
EP3245390A4 (fr
Inventor
Douglas J. NEILSEN
Anthony Leon Spoor
Robert D. HOGAN
James E. Mccarthy, Jr.
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eaton Corp
Original Assignee
Eaton Corp
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 Corp filed Critical Eaton Corp
Publication of EP3245390A1 publication Critical patent/EP3245390A1/fr
Publication of EP3245390A4 publication Critical patent/EP3245390A4/fr
Withdrawn legal-status Critical Current

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
    • F01L1/14—Tappets; Push rods
    • F01L1/146—Push-rods
    • 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
    • F01L1/22—Adjusting or compensating clearance automatically, e.g. mechanically
    • F01L1/24—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically
    • F01L1/245—Hydraulic tappets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M9/00—Lubrication means having pertinent characteristics not provided for in, or of interest apart from, groups F01M1/00 - F01M7/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M9/00—Lubrication means having pertinent characteristics not provided for in, or of interest apart from, groups F01M1/00 - F01M7/00
    • F01M9/10—Lubrication of valve gear or auxiliaries
    • F01M9/104—Lubrication of valve gear or auxiliaries 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
    • 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
    • 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
    • F01L1/22—Adjusting or compensating clearance automatically, e.g. mechanically
    • F01L1/24—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically
    • F01L2001/2427—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically by means of an hydraulic adjusting device located between cam and push rod
    • 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
    • F01L1/22—Adjusting or compensating clearance automatically, e.g. mechanically
    • F01L1/24—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically
    • F01L1/245—Hydraulic tappets
    • F01L2001/256—Hydraulic tappets between cam and push rod
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B19/00—Bolts without screw-thread; Pins, including deformable elements; Rivets
    • F16B19/02—Bolts or sleeves for positioning of machine parts, e.g. notched taper pins, fitting pins, sleeves, eccentric positioning rings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B21/00—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings
    • F16B21/10—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings by separate parts
    • F16B21/16—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings by separate parts with grooves or notches in the pin or shaft
    • F16B21/18—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings by separate parts with grooves or notches in the pin or shaft with circlips or like resilient retaining devices, i.e. resilient in the plane of the ring or the like; Details
    • F16B21/183—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings by separate parts with grooves or notches in the pin or shaft with circlips or like resilient retaining devices, i.e. resilient in the plane of the ring or the like; Details internal, i.e. with spreading action

Definitions

  • the present disclosure relates generally to hydraulic lash adjusting tappets of the type having a roller follower for contacting a cam shaft in an internal combustion engine valve train.
  • Roller lifters can be used in an engine valvetrain to reduce friction and as a result provide increased fuel economy.
  • a roller lifter can open a valve quicker and for a longer period of time than a flat tappet lifter.
  • airflow can be attained quicker and longer increasing the ability to create power.
  • An engine roller lifter for use in a valve train of an internal combustion engine includes a body, an anti-rotation device and a clip.
  • the body can have an outer peripheral surface configured for sliding movement in a bore provided in the engine.
  • the body can define a receiving channel formed in the outer peripheral surface.
  • the body can further define a slot formed at the receiving channel.
  • the anti-rotation device can include a guide plug received in the receiving channel of the body.
  • the guide plug can extend outwardly from the outer peripheral surface of the body.
  • the guide plug can be configured to locate into a bore slot defined in a cylinder head of the internal combustion engine.
  • the clip can be received by the slot and captured the guide plug in the receiving channel.
  • the clip can include a C-clip.
  • the guide plug can include a first and second lobed body portion.
  • the first lobed body portion is keyed in the receiving channel to preclude radial movement of the guide plug.
  • the second lobed body portion can extend radially outwardly beyond the outer peripheral surface of the body.
  • the second lobed body portion can include a pair of parallel sidewalls.
  • the guide plug can be cold-formed.
  • the guide plug can further include an extension portion having a finger thereon. The finger can be configured to prevent rotation of the C-clip.
  • the body can further include a groove and a connecting channel formed into the peripheral surface.
  • the body can further include a transverse passage. Oil collected in the groove can flow to the connecting channel and into the transverse passage to lubricate a roller bearing disposed on the roller lifter.
  • An engine roller lifter for use in a valve train of an internal combustion engine can include a body, an anti- rotation device and a coupling arrangement.
  • the body can have an outer peripheral surface configured for sliding movement in a bore provided in the engine.
  • the body can define a receiving channel formed in the outer peripheral surface.
  • the anti-rotation device can include a guide plug having a first and second lobed body portion.
  • the first lobed body portion can be configured to be slidably received in the receiving channel of the body in an installed position.
  • the second lobed body portion can extend outwardly from the outer peripheral surface of the body.
  • the second lobed body portion can be configured to locate into a bore slot defined in a cylinder head of the internal combustion engine and inhibit rotation of the guide plug and body.
  • the coupling arrangement can couple the anti-rotation device at the receiving channel.
  • the body can further include a groove and a connecting channel formed into the peripheral surface.
  • the body can further include a transverse passage. Oil collected in the groove can flow to the connecting channel and into the transverse passage to lubricate a roller bearing disposed on the roller lifter.
  • the coupling arrangement can comprise a set screw, in another configuration, the coupling arrangement can comprise a clip received by a slot defined in the body. The clip can capture the guide plug in the receiving channel.
  • the coupling arrangement can comprise annealing.
  • the body can be locally annealed in an area around the guide plug. A circumferential edge area that defines an entrance to the channel can be annealed and shaped inwardly to close a circumference and trap the guide plug within the channel.
  • the coupling arrangement can comprise staking, wherein the guide plug can be staked relative to the body.
  • the first lobed body portion can be axially compressed and expanded radially forming an interference fit with the receiving channel of the body.
  • the coupling arrangement comprises resistance welding.
  • the coupling arrangement comprises laser welding.
  • An engine roller lifter for use in a valve train of an internal combustion engine includes a body and an anti-rotation device.
  • the body can have an outer peripheral surface configured for sliding movement in a bore provided in the engine.
  • the body can define a receiving channel formed in the outer peripheral surface.
  • the anti-rotation device can include a guide plug having a first body portion and a second body portion.
  • the first body portion can be formed in a geometrical shape complementary for receipt into the receiving channel.
  • the guide plug can be formed of a smart memory alloy.
  • the engine roller lifter can be heat treated setting the shape of the guide plug to retain the guide plug in an installed position within the receiving channel.
  • the second body portion extends outwardly from the outer peripheral surface of the body.
  • the second body portion can be configured to locate into a bore slot defined in a cylinder head of the internal combustion engine and inhibit rotation of the guide plug and body.
  • the body further defines a slot formed at the receiving channel.
  • a clip can be received by the slot.
  • the clip captures the guide plug in the receiving channel.
  • the clip can be formed of smart memory alloy such that heat treating sets the dip in the slot.
  • the body can further include a groove and a connecting channel formed into the peripheral surface.
  • the body further includes a transverse passage. Oil collected in the groove flows to the connecting channel and into the transverse passage to lubricate a roller bearing disposed on the roller lifter.
  • FIG. 1 is a roller lifter constructed in accordance to one example of the present disclosure and shown in an exemplary Type V valve train arrangement;
  • FIG. 2 is a side perspective view of a roller lifter constructed in accordance to one example of prior art
  • FIG. 3 is a front perspective view of the roller lifter of FIG. 2 and shown with a retaining clip in exploded view;
  • FIG. 4 is a side perspective view of a roller lifter including a roller lifter body and a guide plug constructed in accordance to one example of the present teachings;
  • FIG. 5 is a detail perspective view of the guide plug of the roller lifter of FIG. 4;
  • FIG. 6 is a schematic illustration of a guide plug according to another example of the present disclosure.
  • FIG. 7 is a top view of a guide plug constructed in accordance to another example of the present disclosure and shown retained in a roller lifter body with a C-clip;
  • FIG. 8 is a side perspective view of the roller lifter body of FIG. 7;
  • FIG. 9 is a side perspective view of the guide plug of FIG. 7.
  • FIG. 10 is a detail view of an interface between the guide plug and an opposing bore slot in a cylinder head of an engine.
  • a roller lifter constructed in accordance to one example of the present disclosure is shown and generally identified at reference number 10.
  • the roller lifter 10 is shown as part of a Type V arrangement. It will be appreciated that while the roller lifter 10 is shown in a Type V arrangement, the roller lifter 10 may be used in other arrangements within the scope of the present disclosure. In one non- limiting example, the present teachings can also be applied to a fuel pump actuator. In this regard, the features described herein associated with the roller lifter 10 can be suitable to a wide variety of applications.
  • a cam lobe 12 indirectly drives a first end of a rocker arm 14 with a push rod 16.
  • the roller lifter 10 may be a direct link between the cam lobe 12 and the rocker arm 14. A second end of the rocker arm 14 actuates a valve 20. As the cam lobe 12 rotates, the rocker arm 14 pivots about a fixed shaft 22. The roller lifter 10 is in contact with, and follows the cam 12 through a conventional roller bearing or roller follower 24, such as a needle roller bearing type. Those skilled in the art will appreciate that the present disclosure is not limited to any particular roller follower design, or for example, whether the axle of the roller is provide with needle bearings or merely a bushing.
  • the roller lifter 10 is configured to reciprocate along its axis within a lifter- receiving hole 26 formed in engine block 28.
  • a clearance 29 can be defined between the receiving hole 26 and the roller lifter 10.
  • pressurized engine oil can flow from an engine oil passage P formed in the engine block 28, around the clearance 29 and into a groove 44 formed around the roller lifter.
  • the groove 44 can act as an oil reservoir to provide lubrication for the roller follower 24.
  • the roller lifter 10A generally includes a body 30A, having a leakdown assembly 32A received within the body 30A.
  • a roller bearing 34A is rotatably mounted to the body 30A.
  • An anti-rotation assembly 36A includes a guide plug 38A and a retaining clip 40A.
  • the body 30A includes an outer peripheral surface 42A configured for sliding movement in a bore (not specifically shown) provided in an engine block or cylinder head of an internal combustion engine.
  • the body 30A includes a groove 50A and a pair of concave recess portions 52A formed therein and inset from the outer peripheral surface 42A.
  • the guide plug 38A includes a pair of cylindrical sections 54A that extend from a central body portion 56A.
  • the retaining clip 40A generally includes a ring body 60A having an anti- rotation protrusion 62A extending therefrom.
  • the anti-rotation protrusion 62A extends radially beyond the outer peripheral surface 42A of the body 30A in an installed position.
  • the anti-rotation protrusion 62A is configured to locate or key in a corresponding bore slot (not specifically shown) in the cylinder head for inhibiting rotation of the roller lifter about a longitudinal axis during operation.
  • the retaining clip 40A can be snap fit into the groove 50A to capture the guide plug 38A.
  • the pair of cylindrical sections 54A can locate into the corresponding concave recess portions 52A formed in the body 30A. In the assembled position, the pair of cylindrical sections 54A can protrude radially beyond the outer peripheral surface 42A of the body 30A and key in the corresponding bore slot of the cylinder head.
  • the roller lifter 10 generally includes a body 30, having a leakdown assembly 32 received within the body 30.
  • the roller follower 24 (FIG. 1) is rotatably mounted to the body 30.
  • An anti-rotation device 36 includes a guide plug 38 secured to the body 30 with at least one of a set screw 39 and/or a C-clip 40 (FIG. 6).
  • the body 30 includes an outer peripheral surface 42 configured for sliding movement in a bore slot (see for example bore slot 158, FIG. 10) provided in a cylinder head of an internal combustion engine.
  • a groove 44 is formed around the outer peripheral surface 42.
  • the body 30 includes a receiving channel 50 formed therein and inset from the outer peripheral surface 42 configured to receive the guide plug 38.
  • the guide plug 38 includes a first and a second lobed body portion 52 and 54, respectively.
  • the first lobed body portion 52 is configured to be slidably received into the receiving channel 50 of the body 30.
  • the first lobed body portion 52 will key into the channel 50 to preclude radial movement of the guide plug 38.
  • a slot 60 is defined in the body 30 at the channel 50 for receiving the C-clip 40.
  • the C-clip 40 can retain the guide plug 38 within the channel 50 and preclude axial movement of the guide plug 38.
  • the second lobed body portion 54 extends radially beyond the outer peripheral surface 42 of the body 30 in an installed position.
  • the second lobed body portion 54 is configured to locate or key in a corresponding bore slot (see for example bore slot 158, FIG. 10) in the cylinder head for inhibiting rotation of the roller lifter about a longitudinal axis during operation.
  • the body 30 includes a connecting channel 70 formed therein.
  • the connecting channel 70 can be inset from the outer peripheral surface 42.
  • the connecting channel 70 fluidly connects with a transverse passage 74. Oil that leaks down around the peripheral surface 42 of the body 30 (between the body 30 and the bore of the engine block) can be captured into the groove 44. From the groove 44, oil can flow into the connecting channel 70, through the transverse passage 74 to lubricate the roller bearing 34.
  • the roller lifter 1 10 generally includes a body 130, having a Ieakdown assembly 132 received within the body 130.
  • a roller bearing (see FIG. 1) is rotatably mounted to the body 130.
  • An anti- rotation device 136 includes a guide plug 138 secured to the body 130 with a C-clip 140 (FIG. 7).
  • the body 130 includes an outer peripheral surface 142 configured for sliding movement in a bore (see for example bore slot 158, FIG. 10) provided in a cylinder head or engine block of an internal combustion engine.
  • the body 130 includes a channel 150 formed therein and inset from the outer peripheral surface 142 configured to receive the guide plug 138.
  • the guide plug 138 includes a first and a second lobed body portion 152 and 154, respectively.
  • the first lobed body portion 152 is configured to be slidably received into channel 150 of the body 130 in a direction generally upward as viewed in FIG. 8.
  • the first lobed body portion 152 will key into the channel 150 to preclude radial movement of the guide plug 138.
  • a slot 160 is defined in the body 130 at the channel 150 for receiving the C-clip 140.
  • the C-clip 140 can retain the guide plug 138 within the channel 150 and preclude axial movement of the guide plug 138.
  • the guide plug 138 is cold formed.
  • the second lobed body portion 154 extends radially beyond the outer peripheral surface 142 of the body 130 in an installed position.
  • the second lobed body portion 154 can have a pair of parallel sidewalls 156.
  • the second lobed body portion 154 is configured to locate or key in a corresponding bore slot 158 (FIG. 10) in a cylinder head 159 for inhibiting rotation of the roller lifter about a longitudinal axis during operation.
  • An extension portion 162 can be formed on the guide plug 138.
  • the extension portion 162 can be the result of a forming process for the guide plug 138 such as cold form material overflow.
  • the dies used in cold forming can be designed to allow a bulge to form at one end of the guide plug 138.
  • the extension portion 162 can further include a finger 164 (FIG. 9) configured to prevent rotation of the C-clip 140 that retains the guide plug 138 further improving reliability.
  • the body 130 includes a connecting channel 170 and an outer groove 172 (FIG. 8) formed therein.
  • the connecting channel 170 and the outer groove 172 can be inset from the outer peripheral surface 142.
  • the connecting channel 170 fluidly connects the outer groove 172 with a transverse passage 174. Oil can flow between the connecting channel 170 and the outer groove 172 and to the transverse passage 174 to lubricate the roller bearing (see FIG. 1).
  • additional coupling arrangements and/or joining techniques may be provided for retaining the guide plug 138 within the channel 150 of the body 130 of the roller lifter 110.
  • the body 130 of the roller lifter 110 can be locally annealed in an area around the guide plug 138.
  • the metal of the guide plug 138 is softened, it can be shaped or formed toward the guide plug 138 to retain the guide plug 138 within the channel 150.
  • a circumferential edge area 180 that defines an entrance to the channel 150 can be annealed and shaped inwardly to close the circumference and trap the guide plug 138 within the channel 150.
  • the guide plug 138 can be staked relative to the body 130 of the roller lifter 110. When staking, the guide plug 138 can attain an interference fit in the channel of the body 130.
  • the guide plug 138 can be slidably inserted into the channel 150. Once inserted, a tool such as a staking punch can be used to axially compress the guide plug 138. Axial compression can cause the outer surfaces of the first lobed body portion 152 (and the second lobed body portion 154) to expand radially forming an interference fit with the channel 150 of the body 130. A permanent joint can result that retains the guide plug 138 into the channel 150.
  • the guide plug 138 can be resistance welded to the body 130 in the channel 150. Other welding operations such as laser welding can be used as well to couple the guide plug 138 to the body 130. It will be appreciated that the additional joining techniques described above can be equally applied to the other configurations disclosed herein such as to the guide plug 38 and body 130 of roller lifter 10. Furthermore, in some examples multiple joining techniques disclosed herein may be used in concert to capture the guide plug to the body of the roller lifter.
  • various components of the roller lifter, guide plug and/or clip can be formed of shape or smart memory alloy (SMA).
  • SMA's are metals that can "remember” their original or parent shape.
  • SMA's are Martensitic crystal materials that can be molded, then plastically deformed, and then heat treated to return to the desired shape.
  • the guide plug 138 can be heat treated.
  • heat treated and “heat treating” are used to denote raising the temperature of the SMA above the transition temperature to restore the SMA to its original or parent shape.
  • some SMA's include nickel-titanium (Ni-Ti, or nitinol), copper, zinc and aluminum alloy (Cu-Zn-AI); copper, aluminum and nickel (Cu-AI-Ni); iron, manganese and silicon (Fe-Mn-Si).
  • Ni-Ti nickel-titanium
  • Cu-Zn-AI copper, zinc and aluminum alloy
  • Cu-AI-Ni copper, aluminum and nickel
  • Fe-Mn-Si iron, manganese and silicon
  • Other SMA's may be used within the scope of the present disclosure.
  • the guide plug 138 may be formed of SMA. While the following discussion will be made in reference to the guide plug 138, a guide plug may be formed of SMA having other similar geometries within the scope of the present disclosure. It will be appreciated that the guide plug may be originally formed or molded in a shape consistent to the desired "installed" shape for the given channel 150.
  • the guide plug 138 can be introduced into the channel 150 of the body 130.
  • the guide plug 138 may be plastically deformed prior to insertion into the channel 150. Elevating the temperature of the guide plug 138 causes it to take its original shape. In this regard, heat treating sets the shape of the guide plug 138 in an installed position within the channel 150. It is appreciated that the roller lifter 110 and guide plug 138 may be heated in concert causing the SMA guide plug 138 to be set in an installed position within the channel 150.
  • the guide plug 138 can attain a tolerance or clearance fit relative to the channel 150 in the installed position fixing the guide plug 138 into the channel 150. This example eliminates the requirement of a supplemental retaining device (such as the c-clip 140). Moreover, such a configuration eliminates the requirement of special tooling for installation of the guide plug 138 as there is no press-fit during installation.
  • the c-clip 140 may be formed of SMA.
  • the c-clip 140 can be originally formed or molded in a shape consistent to the desired "installed" shape relative to the body 130.
  • a guide plug 138 can be introduced into the channel 150 of the body 130 and the c-clip 140 (or other supplemental retaining mechanism) subsequently located.
  • the c-clip 140 can be heat treated causing it to take its original shape attaining a fixed relationship with the body 130 and securing the guide plug 138 in the channel 150.
  • the whole assembly (roller lifter 110, guide plug 138 and c-clip 140) may be heated together with the understanding that the SMA components will react appropriately to the heat treatment.
  • more than one piece may be formed of SMA.
  • the guide plug 138 and the c-clip 140 may both be formed of SMA and arranged in geometries to cooperatively "return" to their original shape in a coupled relationship subsequent to heat treatment.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Abstract

Un poussoir à galet pour moteur destiné à être utilisé dans un dispositif de commande des soupapes d'un moteur à combustion interne comprend un corps, un dispositif anti-rotation et un coliier de serrage. Le corps peut comporter une surface périphérique externe conçue pour effectuer un mouvement coulissant dans un alésage ménagé dans le moteur. Le corps peut définir un canal de réception formé dans la surface périphérique extérne. Le corps peut également définir une fente formée au niveau du canal de réception. Le dispositif anti-rotation peut comprendre un élément de guidage reçu dans le canal de réception du corps. Lélément de guidage peut s'étendre vers l'extérieur depuis la surface périphérique externe du corps. La bonde de guidage peut être conçue de manière à se loger dans une fente d'alésage définie dans une tête de cylindre du moteur à combustion interne. Le collier de serrage peut être reçu par la fente et capturer l'élément de guidage dans le canal de réception.
EP16737880.1A 2015-01-14 2016-01-14 Dispositif anti-rotation de soupapes de moteur Withdrawn EP3245390A4 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US201562103387P 2015-01-14 2015-01-14
US201562104121P 2015-01-16 2015-01-16
PCT/US2016/013409 WO2016115346A1 (fr) 2015-01-14 2016-01-14 Dispositif anti-rotation de soupapes de moteur

Publications (2)

Publication Number Publication Date
EP3245390A1 true EP3245390A1 (fr) 2017-11-22
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EP16737880.1A Withdrawn EP3245390A4 (fr) 2015-01-14 2016-01-14 Dispositif anti-rotation de soupapes de moteur

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US (1) US20170306810A1 (fr)
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US10690016B2 (en) * 2016-02-19 2020-06-23 Eaton Intelligent Power Limited Engine valve lifter having anti-rotation plug
US10199817B2 (en) 2016-06-24 2019-02-05 Cooper Technologies Company Variable diameter core termination with variable diameter housing
USD835583S1 (en) * 2017-06-21 2018-12-11 Cooper Technologies Company Electrical cable termination with pull tabs and through holes
CN111655977B (zh) * 2017-12-28 2022-11-11 伊顿智能动力有限公司 具有防旋转塞的发动机气门升降器
WO2019149454A1 (fr) 2018-01-31 2019-08-08 Eaton Intelligent Power Limited Ensemble de levage en deux parties
JP7172752B2 (ja) * 2019-03-07 2022-11-16 株式会社デンソー 燃料噴射ポンプ

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EP3245390A4 (fr) 2018-09-05
US20170306810A1 (en) 2017-10-26
WO2016115346A1 (fr) 2016-07-21
CN107223180A (zh) 2017-09-29

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