EP3411568B1 - Schaltbarer kiphebel mit einem variabler hebelverältnis - Google Patents

Schaltbarer kiphebel mit einem variabler hebelverältnis Download PDF

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Publication number
EP3411568B1
EP3411568B1 EP17702373.6A EP17702373A EP3411568B1 EP 3411568 B1 EP3411568 B1 EP 3411568B1 EP 17702373 A EP17702373 A EP 17702373A EP 3411568 B1 EP3411568 B1 EP 3411568B1
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EP
European Patent Office
Prior art keywords
vvl
switchable
rocker arm
iegr
assembly
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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.)
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EP17702373.6A
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English (en)
French (fr)
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EP3411568A1 (de
Inventor
Majo Cecur
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Eaton Intelligent Power Ltd
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Eaton Intelligent Power Ltd
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Publication of EP3411568A1 publication Critical patent/EP3411568A1/de
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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
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
    • F01L13/0021—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque by modification of rocker arm ratio
    • 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
    • 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
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
    • F01L13/0021—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque by modification of rocker arm ratio
    • F01L13/0026—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque by modification of rocker arm ratio by means of an eccentric
    • 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
    • F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
    • F01L13/0036—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/01—Internal exhaust gas recirculation, i.e. wherein the residual exhaust gases are trapped in the cylinder or pushed back from the intake or the exhaust manifold into the combustion chamber without the use of additional passages
    • 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
    • F01L2800/00—Methods of operation using a variable valve timing mechanism
    • F01L2800/10—Providing exhaust gas recirculation [EGR]

Definitions

  • the present disclosure relates generally to internal exhaust gas recirculation and switchable rocker arm assemblies.
  • Switching rocker arms allow for control of valve actuation by alternating between two or more states, usually involving multiple arms, such as in inner arm and outer arm. In some circumstances, these arms engage different cam lobes, such as low-lift lobes, high-lift lobes, and no-lift lobes. Switching rocker arms can be implemented as part of systems commonly referred to as variable valve timing (VVT) or variable valve actuation (VVA) to improve fuel economy, reduce emissions and improve driver comfort over a range of speeds. Mechanisms are required for switching rocker arm modes in a manner suited for operation of internal combustion engines.
  • VVT variable valve timing
  • VVA variable valve actuation
  • GB 2 526 552 A discloses a valve train assembly has a number of main rocker arms each with a main cam follower and at least one auxiliary cam follower. Each auxiliary cam follower is movably arranged on a rocker arm between a first and second positions. A latch is also used for locking the auxiliary cam follower in the first position. An auxiliary camshaft with a selector cam is provided for each latch to control said latch.
  • EP 0 995 885 A2 (EATON CORP) discloses a rocker arm device for optimizing the functioning of internal combustion engines by controlling the opening and the timing of the cylinder valves according to the engine load and its speed.
  • a discrete switchable variable valve lift (VVL) system constructed in accordance to one example of the present disclosure includes a first switchable VVL rocker arm assembly, a second switchable VVL rocker arm assembly and an actuation assembly.
  • the first switchable VVL rocker arm assembly selectively opens a first valve and includes a first outer arm and a first inner arm that are pivotally connected at a pivot axle.
  • a first latch pin moves between a latched position where the first inner arm and first outer arm move together and an unlatched position where the first inner arm rotates relative to the first outer arm.
  • the second switchable VVL rocker arm assembly selectively opens a second valve and includes a second outer arm and a second inner arm that are pivotally connected at a pivot axle.
  • a second latch pin moves between a latched position where the second inner arm and second outer arm move together and an unlatched position where the second inner arm rotates relative to the second outer arm.
  • the actuation assembly includes an actuation shaft rotatably driven by a first motor.
  • the actuation shaft has a first lift cam and a second lift cam. The first and second lift cams selectively move the respective first and second latch pins between the latched and unlatched positions.
  • the actuation assembly is configured to selectively and alternatively provide four distinct operating conditions.
  • a first operating condition the first and second latch pins are in the unlatched position.
  • a second operating condition the first latch pin is in a latched position and the second latch pin is in an unlatched position.
  • the first switchable VVL rocker arm assembly switches to internal exhaust gas recirculation (iEGR), reopening the first engine valve.
  • iEGR internal exhaust gas recirculation
  • the second switchable VVL rocker arm assembly switches to iEGR reopening the second engine valve.
  • a fourth operating condition the first and second latch pins are both in a latched position.
  • the first and second switchable VVL rocker arm assemblies both switching to iEGR reopening the respective first and second engine valves.
  • the VVL system further includes a sliding variable rocker ratio system (VRRS) contact arm associated with the first switchable VVL rocker arm assembly.
  • the sliding VRRS contact arm moves relative to an iEGR lobe thereby providing a modulated valve lift.
  • the sliding VRRS contact arm is rotatably coupled to a shaft by way of an eccentric pin.
  • the shaft is driven by a second motor.
  • the first motor is an electric step motor.
  • the VVL system further comprises three additional first switchable VVL rocker arm assemblies that are configured to move in concert between latched and unlatched positions with the first switchable VVL rocker arm assemblies.
  • Three additional first cams are arranged on the actuation shaft. The respective first cams move the first switchable VVL rocker arm assemblies between the latched and unlatched positions.
  • Three additional second switchable VVL rocker arm assemblies are configured to move in concert between latched and unlatched positions with the second switchable VVL rocker arm assemblies.
  • Three additional second cams are arranged on the actuation shaft. The respective second cams move the second switchable VVL rocker arm assemblies between the latched and unlatched positions.
  • the actuation assembly includes a Maltese cross mechanism and an engagement disk. The engagement disk has a locating pin that selectively locates into one of a series of slots defined on the Maltese cross mechanism.
  • the present disclosure provides a discrete switchable variable valve lift (VVL) system that allows additional opening of exhaust valves during an intake stroke.
  • VVL discrete switchable variable valve lift
  • the exhaust valves can be opened immediately after the main exhaust lift.
  • the exhaust valves can additionally or alternatively be opened later in the intake stroke.
  • the present disclosure additionally provides a variable rocker ratio system (VRRS) that can modulate the timing of the internal exhaust gas recirculation (iEGR) in addition to the discrete switchable VVL system.
  • VRS variable rocker ratio system
  • iEGR internal exhaust gas recirculation
  • a mechanism provides for four discrete actuation positions. In one example a Maltese cross configuration is used.
  • the discrete switchable VVL system 10 comprises eight three-roller VVL rocker arm assemblies generally identified at reference 20 and individually identified at reference 20a - 20h.
  • the discrete switchable VVL system 10 further includes an actuation assembly 22 having an actuation shaft 24 that rotatably actuates by way of a first motor 30.
  • the first motor 30 can be an electric step motor.
  • the actuation shaft 24 includes four first lift cams collectively identified at 32 and four second lift cams collectively identified at reference 34.
  • the first lift cams 32 are individually identified at reference 32a - 32d.
  • the second lift cams 34 are individually identified at reference 34a - 34d.
  • the three-roller VVL rocker arm assemblies 20 open and close exhaust valves, collectively identified at reference 40 and individually identified at reference 40a - 40h.
  • Hydraulic lash adjusters (HLA's) collectively identified at reference 44 and individually identified at reference 44a - 44h control lash of a corresponding VVL rocker arm assembly 20a - 20h.
  • the VVL rocker arm assembly 20a includes an outer arm 52 and an inner arm 54 that are pivotally connected at a pivot axle 56.
  • a roller axle 60 extends transversely through the outer arm 52 and supports a pair of outer rollers 66.
  • the inner arm 54 comprises an inner bushing 70 that supports an inner roller 72.
  • the roller axle 60 extends through the inner bushing 70.
  • the VVL rocker arm assembly 20a includes a latch pin 80 that moves between a latched position and an unlatched position.
  • the latch pin 80 When the latch pin 80 is in the unlatched position, the inner arm 54 is free to pivot (downward as viewed in FIG. 2 ) with respect to the outer arm 52 about the pivot axle 56.
  • a biasing member 58 biases the inner arm 54 relative to the outer arm 52 back to the position shown in FIG. 2 .
  • the latch pin 80 engages the inner arm 54 and prevents the inner arm 54 from pivoting with respect to the outer arm 52 such that the inner and outer arms 54 and 52 rotate together about the pivot axle 56 as a single body.
  • a cam 100 is shown in FIG. 2 for cooperation with the VVL rocker arm assembly 20a.
  • the cam 100 includes an inner cam 102 and a pair of outer cams 104.
  • the inner cam 102 is configured to engage the inner roller 32 while the outer cams 104 are configured to engage the outer rollers 26.
  • FIGS. 3-6 various lift profiles that can be achieved with the discrete switchable VVL system 10 will be described.
  • a latch 80e has been identified that is associated with the VVL rocker arm assembly 20e.
  • operation of the rocker arm pairs 20a and 20e will be described below with the appreciation that the other rocker arm pairs 20b and 20f; 20c and 20g; and 20d and 20h operate similarly.
  • the first motor 30 is configured for electromechanical actuation for rotating the shaft 24 in four distinct positions (corresponding to FIGS. 3-6 ).
  • FIG. 3 shows only standard exhaust and intake operating modes with a hot engine and either very low (below 10-15%) or high (above 80-85%) engine load.
  • the exhaust profile is identified at reference 120.
  • the intake profile is identified at reference 122.
  • FIG. 4 shows a standard exhaust profile 130 that is switched to internal exhaust gas recirculation (iEGR), identified at 132 immediately after an exhaust lift. As shown, after completion of standard lift just before closing, the exhaust valve 40e reopens allowing hot exhaust gasses (just expelled) to get back into the cylinder.
  • FIG. 4 is for cold start and cold engine and low load.
  • FIG. 5 illustrates a standard exhaust profile 140 that is switched to iEGR identified at 142 later (as compared to FIG.4 ), in the intake stroke.
  • the additional opening of the exhaust valve 40e later in the intake stroke mainly targets NOx reduction.
  • FIG. 5 is low to medium engine speed and load.
  • FIG. 6 illustrates a standard exhaust profile 150 and two distinct switchable iEGR profiles 152, 154 immediately after exhaust lift and/or later in the intake stroke. Both iEGR lift profiles 152, 154 provide additional openings of exhaust valves immediately after the main lift and one later in intake stroke (can be switched on or off).
  • the discrete switchable VVL system 10 provides four levels of iEGR. None ( FIG. 3 ); a first iEGR 132 ( FIG. 4 ); a second iEGR 142 ( FIG. 5 ); and dual iEGR 152, 154 ( FIG. 6 ).
  • FIGS. 7A , 7B and 8 illustrate a VRRS rocker arm assembly 210 according to another example of the present disclosure.
  • the VRRS rocker arm assembly 210 can be used in place of corresponding VVL rocker arm assemblies 20a - 20d to provide a system capable of standard lift, single step iEGR and modulated VRRS timing iEGR.
  • the VRRS rocker arm assembly 210 generally includes a VRRS a switchable VRRS (first arm) 212, a main exhaust lift rocker arm body (second arm) 214, a sliding VRRS contact arm 216 and a latch pin 218.
  • the sliding VRRS contact arm 216 generally includes a pair of sliding VRRS's 220 configured to contact a corresponding pair of iEGR cam lobes 226 of cam 230.
  • a roller 234 rotatably mounted to the main exhaust lift rocker arm body 214 rotatably engages a main exhaust cam lobe 236 of the cam 230.
  • the latch pin 218 moves between a latched position and an unlatched position.
  • the main exhaust lift rocker arm body 214 is free to pivot relative to the VRRS switchable VRRS 212 about a pivot axis 238.
  • a biasing member 240 biases the main exhaust lift rocker arm body 214 relative to the VRRS switchable VRRS 212 back to the position shown in FIG. 7A .
  • the latch pin 218 When the latch pin 218 is in the latched position, the latch pin 218 engages the VRRS switchable VRRS 212 and prevents the main exhaust lift rocker arm body 214 from pivoting with respect to the VRRS switchable VRRS 212 such that the main exhaust lift rocker arm body 214 and the VRSS switchable VRRS 212 rotate together about the pivot axis 238 as a single body.
  • An HLA 244 engages the main exhaust lift rocker arm body 214 to minimize lash.
  • the VRRS rocker arm assembly 210 is part of a VRRS rocker arm system 242 that includes an actuation assembly 248 having a shaft 250 rotatably driven by second motor 260.
  • the second motor 260 can be an electric motor.
  • the shaft 250 connects to the sliding VRRS contact arm 216.
  • the sliding VRRS contact arm 216 is rotatably coupled to a shaft 250 having an eccentric pin 252. While one VRRS rocker arm assembly 210 is shown in FIG. 7A , it will be appreciated that the shaft 250 will have additional eccentric pins configured to engage and move additional VRSS contact arms of corresponding VRSS rocker arm assemblies 210a-210d. For clarity, the shaft 250 and motor 260 have been removed in FIG. 10 .
  • the shaft 250 is caused to rotate by the electric motor 260. Because the pin 252 is eccentric relative to the axis of rotation of the shaft 250, the sliding VRRS contact arm 216 is caused to move generally left and right as viewed in FIG. 7A to achieve early or late opening of the valve (represented by a first position in solid line and a second position in phantom line).
  • the VRRS's 220 can locate at different locations, the pair of iEGR cam lobes 226 engage the VRRS's 220 at different times allowing for variable timing.
  • the VRRS function is only on the sliding VRRS contact arm 216. As a result, cam phasing is attained only on the switchable internal iEGR portion of the VRRS rocker arm assembly 210.
  • FIG. 9 illustrates a discrete switchable VVL system having VRRS control and constructed in accordance to one example of the present disclosure is shown and generally identified at reference 310.
  • the discrete switchable VVL system having VRRS control 310 is similar to the discrete switchable VVL system 10 described above except that that rocker arm assemblies 20a-20d are replaced with VRSS rocker arm assemblies 210a-210d controlled by the VRSS rocker arm system 242.
  • the discrete switchable VVL system 310 allows additional opening of the exhaust valves immediately after the main exhaust lift (identified at iEGR profile 320) and/or modulated timing lift later in the intake stroke.
  • the modulated iEGR profile is identified collectively at reference 330 and individually at 330a, 330b and 330c. It will be appreciated that additional profiles can be attained by moving the sliding VRRS contact arm 216 with the actuation assembly 248.
  • FIG. 11 illustrates an actuation assembly 350 constructed in accordance to additional features of the present disclosure.
  • the actuation assembly 350 includes a Maltese cross mechanism 352 and an engagement disk 354 that is driven through a drive shaft 358 by an electric motor 360.
  • the Maltese cross mechanism 352 rotates an actuation shaft 370 having a plurality of cams 372.
  • the engagement disk 354 includes a locating pin 380 that selectively locates in slots 382 to rotate the actuation shaft 370 to desired positions.
  • the actuation assembly 350 can be used for discrete positioning, multi-position actuation (such as the four way positioning described above); and multistep actuation of the VRRS rocker arm system 242.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Valve Device For Special Equipments (AREA)

Claims (15)

  1. Diskretes schaltbares variables Ventilhub-, VVL, System (10), umfassend:
    eine erste schaltbare VVL-Kipphebelbaugruppe (20a), die selektiv ein erstes Ventil (40a) öffnet, wobei die erste schaltbare VVL-Kipphebelbaugruppe (20a) Folgendes umfasst:
    einen ersten äußeren Arm (52) und einen ersten inneren Arm (54), die an einer ersten Schwenkachse (56) schwenkbar verbunden sind, einen ersten Verriegelungsstift (80a), der sich zwischen einer verriegelten Position, in der sich der erste innere Arm (54) und der erste äußere Arm (52) zusammen bewegen, und einer entriegelten Position, in der sich der erste innere Arm (54) im Verhältnis zu dem ersten äußeren Arm (52) dreht, bewegt;
    eine zweite schaltbare VVL-Kipphebelbaugruppe (20e), die selektiv ein zweites Ventil (40e) öffnet, wobei die zweite schaltbare VVL-Kipphebelbaugruppe (20e) Folgendes umfasst:
    einen zweiten äußeren Arm (52) und einen zweiten inneren Arm (54), die an einer Schwenkachse (56) schwenkbar verbunden sind, einen zweiten Verriegelungsstift (80e), der sich zwischen einer verriegelten Position, in der sich der zweite innere Arm (54) und der zweite äußere Arm (52) zusammen bewegen, und einer entriegelten Position, in der sich der zweite innere Arm (54) im Verhältnis zu dem zweiten äußeren Arm (52) dreht, bewegt; und
    eine Betätigungsbaugruppe (22), die eine Betätigungswelle (24) aufweist, die von einem ersten Motor (30) drehbar angetrieben wird, wobei die Betätigungswelle (24) eine erste Hubkurve (32) und eine zweite Hubkurve (34) aufweist, wobei die ersten und zweiten Kurven (32, 34) die jeweiligen ersten und zweiten Verriegelungsstifte (80a, 80e) zwischen der verriegelten und der entriegelten Position selektiv bewegen, wobei die Betätigungsbaugruppe (22) konfiguriert ist, um selektiv und alternativ vier unterschiedliche Betriebsbedingungen bereitzustellen, umfassend:
    eine erste Betriebsbedingung, bei der sich die ersten und zweiten Verriegelungsstifte (80a, 80e) in der entriegelten Position befinden;
    eine zweite Betriebsbedingung, bei der sich der erste Verriegelungsstift (80a) in einer verriegelten Position befindet und sich der zweite Verriegelungsstift (80e) in einer entriegelten Position befindet, wobei die erste schaltbare VVL-Kipphebelbaugruppe (20a) auf eine interne Abgasrückführung (iEGR) umschaltet, wodurch das erste Motorventil (40a) wieder geöffnet wird;
    eine dritte Betriebsbedingung, bei der sich der erste Riegel (80a) in einer entriegelten Position befindet und sich der zweite Riegel (80e) in einer verriegelten Position befindet, wobei die zweite schaltbare VVL-Kipphebelbaugruppe (20e) auf die iEGR schaltet, wodurch das zweite Motorventil (40e) wieder geöffnet wird; und
    eine vierte Betriebsbedingung, bei der sich die ersten und zweiten Verriegelungsstifte (80a, 80e) in der verriegelten Position befinden, wobei die ersten und zweiten schaltbaren VVL-Kipparmbaugruppen (20a, 20e) beide auf die iEGR umschalten, wodurch die jeweiligen ersten und zweiten Motorventile (40a, 40e) wieder geöffnet werden.
  2. VVL-System (10) nach Anspruch 1, wobei die erste schaltbare VVL-Kipphebelbaugruppe (20a) die iEGR zu einem ersten Zeitpunkt öffnet, und die zweite schaltbare VVL-Kipphebelbaugruppe (20e) die iEGR zu einem zweiten Zeitpunkt öffnet, wobei der zweite Zeitpunkt nach dem ersten Zeitpunkt vorkommt.
  3. VVL-System (10) nach Anspruch 2, weiter umfassend:
    einen gleitenden Kontaktarm (216) eines Systems mit variabler Kipphebelübersetzung, VRRS, der mit der ersten schaltbaren VVL-Kipphebelbaugruppe (20a) verknüpft ist und der sich im Verhältnis zu einem iEGR-Nocken (226) bewegt, wodurch ein modulierter Ventilhub bereitgestellt wird.
  4. VVL-System (10) nach Anspruch 3, wobei der gleitende VRRS-Kontaktarm (216) mit einer Welle (250) anhand eines Exzenterstifts (252) drehbar gekoppelt ist, wobei die Welle (250) von einem zweiten Motor (260) angetrieben wird.
  5. VVL-System (10) nach Anspruch 1, wobei der erste Motor (30) ein elektrischer Schrittmotor ist.
  6. VVL-System (10) nach Anspruch 1, weiter umfassend drei zusätzliche erste schaltbare VVL-Kipparmbaugruppen (20b, 20c, 20d), die konfiguriert sind, um sich zwischen verriegelten und entriegelten Positionen mit den ersten schaltbaren VVL-Kipparmbaugruppen (20a) zusammen zu bewegen.
  7. VVL-System (10) nach Anspruch 6, weiter umfassend drei zusätzliche erste Kurven (32b, 32c, 32d), die auf der Betätigungswelle (24) angeordnet sind, wobei die jeweiligen ersten Kurven (32b, 32c, 32d) die ersten schaltbaren VVL-Kipparmbaugruppen (20b, 20c, 20d) zwischen den verriegelten und entriegelten Positionen bewegen.
  8. VVL-System (10) nach Anspruch 7, weiter umfassend drei zusätzliche zweite schaltbare VVL-Kipparmbaugruppen (20f, 20g, 20h), die konfiguriert sind, um sich zusammen zwischen den verriegelten und entriegelten Positionen mit den zweiten schaltbaren VVL-Kipparmbaugruppen (20e) zu bewegen.
  9. VVL-System (10) nach Anspruch 8, weiter umfassend drei zusätzliche zweite Kurven (34b, 34c, 34d), die auf der Betätigungswelle (24) angeordnet sind, wobei die jeweiligen zweiten Kurven (34b, 34c, 34d) die zweiten schaltbaren VVL-Kipparmbaugruppen (20f, 20g, 20h) zwischen den verriegelten und entriegelten Positionen bewegen.
  10. VVL-System (10) nach Anspruch 1, wobei die Betätigungsbaugruppe einen Malteserkreuzmechanismus (352) und eine Eingriffsscheibe (354) umfasst, wobei die Eingriffsscheibe (354) einen Passstift (380) aufweist, der selektiv in einen von einer Reihe von Schlitzen (382) passt, die auf dem Malteserkreuzmechanismus (352) definiert sind.
  11. VVL-System (10) nach Anspruch 1, weiter umfassend:
    einen gleitenden Kontaktarm (216) eines Systems mit variabler Kipphebelübersetzung, VRRS, der mit der ersten schaltbaren VVL-Kipphebelbaugruppe (20a) verknüpft ist und der sich mit Bezug auf einen iEGR-Nocken (226) bewegt, wodurch ein Ventilhub mit variabler Zeitsteuerung bereitgestellt wird.
  12. VVL-System (10) nach Anspruch 11, wobei der gleitende VRRS-Kontaktarm (216) anhand eines Exzenterstifts (252) mit einer Welle (250) drehbar gekoppelt ist, wobei die Welle (250) von einem zweiten Motor (260) angetrieben wird.
  13. VVL-System (10) nach Anspruch 12, wobei die erste schaltbare VVL-Kipphebelbaugruppe (20a) die iEGR zu einem ersten Zeitpunkt öffnet, und die zweite schaltbare VVL-Kipparmbaugruppe (20e) die iEGR zu einem zweiten Zeitpunkt öffnet, wobei der zweite Zeitpunkt nach dem ersten Zeitpunkt vorkommt.
  14. VVL-System (10) nach Anspruch 13, weiter umfassend drei zusätzliche erste schaltbare VVL-Kipparmbaugruppen (20b, 20c, 20d), die konfiguriert sind, um sich zusammen zwischen den verriegelten und entriegelten Positionen mit den ersten schaltbaren VVL-Kipparmbaugruppen (20a) zu bewegen; und weiter umfassend drei zusätzliche erste Kurven (32b, 32c, 32d), die auf der Betätigungswelle (24) angeordnet sind, wobei die jeweiligen ersten Kurven (32b, 32c, 32d) die ersten schaltbaren VVL-Kipparmbaugruppen (20b, 20c, 20d) zwischen den verriegelten und entriegelten Positionen bewegen; und weiter umfassend drei zusätzliche gleitende VRRS-Kontaktarme (216), die mit den jeweiligen ersten schaltbaren VVL-Kipparmbaugruppen (20b, 20c, 20d) verknüpft sind und die sich mit Bezug auf einen iEGR-Nocken (226) bewegen, wodurch ein Ventilhub mit variabler Zeitsteuerung bereitgestellt wird.
  15. VVL-System (10) nach Anspruch 11, wobei der erste Motor (30) ein elektrischer Schrittmotor ist.
EP17702373.6A 2016-02-01 2017-01-31 Schaltbarer kiphebel mit einem variabler hebelverältnis Active EP3411568B1 (de)

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US201662289538P 2016-02-01 2016-02-01
PCT/EP2017/052071 WO2017134062A1 (en) 2016-02-01 2017-01-31 Variable rocker ratio system for a switchable rocker arm

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IT1302701B1 (it) * 1998-10-20 2000-09-29 Eaton Automotive Spa Dispositivo a bilanciere per il controllo contemporaneo dell'alzatadelle valvole e della relativa fasatura in un motore a scoppio.
US20110114067A1 (en) * 2009-11-18 2011-05-19 Gm Global Technology Operations, Inc. Engine including valve lift assembly for internal egr control
WO2015093265A1 (ja) * 2013-12-20 2015-06-25 ヤマハ発動機株式会社 エンジンの動弁装置
GB2526554A (en) * 2014-05-27 2015-12-02 Eaton Srl Valvetrain with variable valve actuation

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