WO2017207671A1 - Bielle à longueur variable, dispositif de réglage d'un rapport de compression et moteur à combustion interne - Google Patents

Bielle à longueur variable, dispositif de réglage d'un rapport de compression et moteur à combustion interne Download PDF

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Publication number
WO2017207671A1
WO2017207671A1 PCT/EP2017/063231 EP2017063231W WO2017207671A1 WO 2017207671 A1 WO2017207671 A1 WO 2017207671A1 EP 2017063231 W EP2017063231 W EP 2017063231W WO 2017207671 A1 WO2017207671 A1 WO 2017207671A1
Authority
WO
WIPO (PCT)
Prior art keywords
connecting rod
adjusting
actuating
length
switching
Prior art date
Application number
PCT/EP2017/063231
Other languages
German (de)
English (en)
Inventor
Andreas Krobath
Juergen PICHLER
Original Assignee
Avl List Gmbh
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
Priority claimed from ATA50490/2016A external-priority patent/AT519011B1/de
Application filed by Avl List Gmbh filed Critical Avl List Gmbh
Priority to CN201780047661.1A priority Critical patent/CN110114566B/zh
Priority to DE112017002716.0T priority patent/DE112017002716A5/de
Priority to US16/306,007 priority patent/US10876474B2/en
Publication of WO2017207671A1 publication Critical patent/WO2017207671A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/04—Engines with variable distances between pistons at top dead-centre positions and cylinder heads
    • F02B75/045—Engines with variable distances between pistons at top dead-centre positions and cylinder heads by means of a variable connecting rod length

Definitions

  • the present invention relates to a length-adjustable connecting rod, a device for adjusting a compression ratio with such a connecting rod and an internal combustion engine with such a device.
  • hydraulic systems are provided in some connecting rods, which move against each other displaceable parts of the connecting rod and / or can fix in a desired position.
  • two hydraulic chambers are provided for this purpose, each of which can be charged with a hydraulic medium.
  • US 2013 0 247 879 A1 relates to an internal combustion engine with one or more connecting rods, each having an end piece for coupling to a crankshaft.
  • An eccentric coupler couples the tail to a crankpin and has a rotary valve which projects into a receiving chamber.
  • the receiving chamber is divided into several sections, so that filling a first Section with a liquid and dissipating the liquid from a second section rotates the rotary valve and thus the eccentric coupler in a first direction.
  • a compression ratio regulator may be controlled to open a drainage channel of the first section so that oil from the first section may be delivered to the opposite or second section.
  • a first aspect of the invention relates to a, in particular hydraulically, length-adjustable connecting rod, in particular for an internal combustion engine, with a small connecting rod eye and a large connecting rod eye, which preferably has a switching device.
  • the switching device is preferably adapted to control the length of the connecting rod, in particular hydraulically.
  • the connecting rod preferably has an actuating device which can be actuated from outside the connecting rod, in particular mechanically, which has a rotatably mounted actuating unit and is set up to mechanically switch, in particular actuate, the switching device by rotating the actuating unit.
  • a second aspect of the invention relates to a device for adjusting a compression ratio in an internal combustion engine, in particular reciprocating piston engine, which preferably has a, in particular hydraulically, length-adjustable connecting rod according to the first aspect of the invention.
  • the device preferably has an actuating device which is set up to actuate the setting unit, in particular mechanically, in particular to turn it.
  • a third aspect of the invention relates to an internal combustion engine, in particular reciprocating engine, having a device for adjusting a compression ratio according to the second aspect of the invention.
  • a fourth aspect of the invention relates to a vehicle, in particular a motor vehicle, which has an internal combustion engine according to the third aspect of the invention.
  • the invention is particularly based on the approach, a switching device, which is preferably adapted to, in particular hydraulic, setting a length of a length-adjustable connecting rod, by means of a twisting, in particular by means of pivoting or a deflection, a rotatably mounted adjusting unit, which is part of an adjusting device to switch mechanically, in particular to operate.
  • the rotation is preferably caused by an au outside the connecting rod caused mechanical actuation of the actuator
  • the actuation of the switching device can be carried out, in particular reliably, carried out or executed.
  • one or more switching states of the switching device which is preferably set up to control a flow of a hydraulic medium, reliably be mechanically activated or switched without the spatial position of the actuator relative to the switching device, the connecting rod or a connecting rod eye of the connecting rod at the activation or circuit changes.
  • the rotatable bearings of the adjusting device that is necessary for activation or switching of the switching device additional space for movement of the adjusting device.
  • the adjusting device may remain substantially congruent in the movement necessary for activating or switching the switching device.
  • the adjusting unit can during rotation transmit a moment to the switching device, in particular to a valve or a component of a valve of the switching device, which preferably causes the switching device to change the flow of the hydraulic medium through the connecting rod or Hydraulikkalnale the connecting rod.
  • the moment may cause the switching device to generate a first hydraulic likhunt the connecting rod with the hydraulic medium to charge and a second hydraulic chamber of the connecting rod to empty or vice versa, or to pressurize the hydraulic medium in the first hydraulic chamber with a pressure which is higher than the pressure of the hydraulic medium in the second hydraulic chamber or vice versa.
  • the length of the connecting rod can be controlled reliably and a compression ratio in an internal combustion engine with such a connecting rod can be reliably adjusted.
  • the invention enables an improved length-adjustable connecting rod, in particular a reliable and / or space-saving operation of a switching device for controlling the connecting rod length.
  • the actuating unit is arranged along a contour of the connecting rod, so that protruding or protruding beyond the contour of the connecting rod also during actuation of the actuating unit, in particular during rotation or pivoting or deflection of the actuator, avoided or at least reduced .
  • the adjusting unit can be arranged along the contour in such a way that only little space is required.
  • the connecting rod further comprises a hydraulically operated length adjustment, which is adapted to adjust the length of the connecting rod.
  • the switching device is thereby configured to control a flow of a hydraulic medium for operating the length adjustment device.
  • the switching device may have, for example, one or more valves which can be opened or closed by means of mechanical actuation by the actuating unit.
  • the actuating unit on an annular slide which is rotatably mounted around the large connecting rod eye of the connecting rod around and is adapted to transmit a recorded from au ßerrenz the connecting rod switching pulse to the switching device.
  • the annular slide is semicircular or annular and coaxial with the large connecting rod eye. orderly.
  • the annular slide has an inner diameter which substantially corresponds to the diameter of the large connecting-rod eye.
  • the setting unit or the annular slide can be adapted to the contour of the connecting rod and takes up only little space.
  • the actuator or the slide ring is acted upon actuation with a moment from au ßerrenz the connecting rod and thereby rotated, in particular pivoted or deflected.
  • the setting unit or the annular slide transmits the torque, preferably substantially unimpeded, to the switching device or devices which, by means of the transmitted torque, can adjust the length of the connecting rod or control the flow of the hydraulic medium.
  • the switching device can be reliably switched, in particular actuated, or the length of the connecting rod can be reliably adjusted.
  • the annular slide has a first half-ring-shaped ring element, in a variant, a first half-ring-shaped ring element and a second half-ring-shaped ring element.
  • the adjusting device further comprises two along the connecting rod, in particular along a Pleuell Kunststoffsachse, slidably mounted adjusting elements.
  • piston-side ends of the adjusting elements facing the small connecting rod eye cooperate with the ends of the first half-ring-shaped ring element facing away from the small connecting rod eye.
  • first half-ring-shaped ring element and the second half-ring-shaped ring element engage piston-side ends of the adjusting elements in each case between the first and second ring element.
  • the first and second ring element are formed as a common part.
  • the first and second ring element are acceleration neutral to each other.
  • the arrangement described above allows the actuating pulse reliably from a region of the large connecting rod facing away from the small connecting rod eye, in particular from a region of the crankshaft, into a region of the large connecting rod eye facing the small connecting rod eye, in particular in a region between the small and large connecting rod eye, to transfer or direct.
  • the components of the adjusting device can be arranged space-saving and / or operated, i. be moved.
  • the switching device has at least one check valve for regulating the flow of the hydraulic medium.
  • the at least one check valve is arranged or arranged to prevent emptying of one or more hydraulic chambers of the connecting rod, in particular the length adjustment, in a closed state and / or to allow in an open state.
  • the adjusting device is designed to transfer the at least one check valve from the closed state to the open state and vice versa, or to keep it in the closed state and / or the opened state.
  • the switching device can also have at least one slide valve for regulating the flow of the hydraulic medium.
  • the actuator may be configured to actuate the at least one spool valve, i. to control the opening and closing of the valve.
  • the at least one check valve is designed as a ball valve.
  • the adjusting device is adapted to lift a ball of the at least one ball valve from a valve seat of the at least one ball valve by rotating the actuator or release the valve seat by rotating the actuator.
  • the adjusting device or the switching device to one or more valve pins, which are preferably at least partially arranged in each case a hydraulic channel.
  • the valve pin or pins moved by interaction with the actuator in the manner, in particular axially displaced that the ball can be lifted from the valve seat against a pressure of the hydraulic medium and / or against a spring tension of a locking spring and the valve seat is released.
  • the at least one check valve can be reliably actuated, ie opened or closed, and the inflow and outflow of hydraulic medium can be controlled from one or more or into one or more hydraulic chambers.
  • the setting unit has a ramp which is set up for actuating the switching device, in particular a valve of the switching device.
  • the ramp is adapted to interact with at least one valve pin of the actuating device or the switching device.
  • the valve pin moves, in particular axially displaced, and thereby actuate at least one valve, in particular check valve, the switching device.
  • the connecting rod has a locking device, which is adapted to fix the adjusting device in a setting state. This allows the operation of the switching device over a predetermined period.
  • at least one valve of the switching device can thereby be opened or kept open at least until the hydraulic medium has drained from a hydraulic chamber.
  • the adjusting device in particular the setting unit and / or at least one of the adjusting elements, at least one locking recess.
  • the locking device further comprises at least one clampable locking pin.
  • the at least one locking recess is preferably arranged such, in particular on the setting unit and / or on at least one of the adjusting elements, that the locking pin engages in a locking state in the locking recess.
  • the locking pin is made of spring steel wire and arranged so that it can engage in a transverse to a longitudinal axis of the adjusting elements arranged groove.
  • the locking pin is clamped with a spring element and arranged such that it can engage with one end in the at least one, preferably blind hole-like, Arret istsaus supraung.
  • the adjusting device in particular the setting unit and / or at least one of the adjusting elements, even during the cyclical movement along a trajectory of the connecting rod during operation of an internal combustion engine allow reliable operation of the switching device, in particular over a predetermined period.
  • the actuating device is designed as a rocker switch with at least one rocking axis.
  • the actuating device preferably has a rocker head with two active surfaces which can be coupled to the actuating device such that tilting of the rocker head causes the actuating unit to rotate.
  • the rocker head is preferably designed such that in each case one adjusting elements of the adjusting device can interact with one of the two active surfaces.
  • the actuating device is arranged in such a manner that the adjusting means of the connecting rod connected to a crankshaft of the internal combustion engine interact with at least one of the two active surfaces during cyclical movement along a trajectory during operation of the internal combustion engine at a predetermined point of the trajectory, in particular one by the actuating device can accommodate mediated actuation pulse can.
  • a corresponding switching state of the switching device is activated by a predetermined tilt position of the rocker head.
  • various switching states of the switching device can be switched by tilting the rocker head.
  • the actuating device enable a reliable actuation of the actuating device of the connecting rod, in particular the transmission of an actuating pulse to the actuating device.
  • the rocker head sits on the rocking axis rotationally fixed or is rotatably mounted on the rocking axis.
  • the rocker head can be tilted by means of an actuator, which is connected to the rocking axis or the rocker head via a rocker lever. This allows a precise tilting of the rocker head and thus reliable operation of the adjusting device.
  • the actuating device is designed as a switching platform with at least two actuating elements.
  • each actuating element has an active surface, which can be moved in a direction perpendicular to the eccentric axis by means of an eccentric element which is seated on an eccentric axis.
  • a plurality of, in particular two, eccentric axes are mechanically connected to one another in such a manner that in each case two actuating elements for actuating an actuating device can be moved in opposite directions or can only move in opposite directions. This ensures that only one of the actuating elements with the adjusting device, in particular an actuating element, can interact.
  • Fig. 1 a shows a first preferred embodiment of an actuating device in a first position
  • FIG. 1 b the embodiment of Figure 1 a in a second position.
  • 2 shows a second preferred embodiment of an adjusting device.
  • Fig. 3 shows a preferred embodiment of a switching device
  • 4a shows a first preferred embodiment of a locking device in three-dimensional representation
  • 5a shows a second preferred embodiment of a locking device in three-dimensional representation
  • FIG. 5b shows the locking device from FIG. 5a in a plan view
  • Fig. 6 shows a preferred embodiment of a part of a length-adjustable
  • FIG. 7 shows a first preferred embodiment of an actuating device in an exploded view
  • Fig. 8 shows a preferred embodiment of a device for setting a compression ratio
  • FIG. 10 shows a third preferred embodiment of an actuating device
  • FIG. 1 1 to 13 an oil scheme for a hydraulically switched switching mechanism for the shift paddles shown in Figures 8 to 10 ..;
  • FIGS. 8 and 15 an electrical switching mechanism for the shift paddles according to FIGS. 8 to 10.
  • Figures 1a and 1b show a first preferred embodiment of an adjusting device 20 of a length-adjustable connecting rod (not shown), which is adapted to switch a switching device 10 mechanically.
  • the switching device 10 preferably has check valves 11, 11 ', which are designed to control the flow of hydraulic medium through hydraulic channels 12 of a length adjustment device 50.
  • the hydraulic channels 12 can open into a first hydraulic chamber 4 and a second hydraulic chamber 5 of the length adjustment device 50, which can be formed by a hydraulic cylinder 6 of the connecting rod and a hydraulic piston 7 of the connecting rod, in particular a reciprocating piston acting on both sides.
  • the switching device 10 is in a first switching state (state A), in which hydraulic medium from the second hydraulic chamber 5 via an operable by the switching device 20, open check valve 1 1 'can flow.
  • the first hydraulic chamber 4 preferably via a supply channel 13 supplied, in particular pressurized, hydraulic medium can therefore cause a movement of the hydraulic piston 7 in a large connecting rod 3 of the connecting rod remote direction, indicated by the arrow 7 '.
  • small connecting rod eye (not shown) of the connecting rod is moved. If the hydraulic piston 7 abuts a first end face 6 'of the hydraulic cylinder 6 facing away from the large connecting rod eye 3, the connecting rod has its maximum length.
  • the switching device 10 is in a second switching state (state B), in which hydraulic medium from the first hydraulic chamber 4 via an operable by the switching device 20, open check valve 1 1 'can flow.
  • the second hydraulic chamber 5 preferably via the inflow channel 13 supplied, in particular pressurized, hydraulic medium can therefore cause a movement of the hydraulic piston 7 in the large connecting rod 3 of the connecting rod facing direction, indicated by the arrow 7 '. Accordingly, the small connecting rod eye connected to the hydraulic piston 7 is also moved. If the hydraulic piston 7 abuts against a second end face 6 "of the hydraulic cylinder 6 facing the large connecting rod eye 3, the connecting rod has its minimum length.
  • the actuating device 20 has an actuating unit 21.
  • This preferably has an annular slide 21 ', which is preferably formed substantially annular and with the large connecting rod 3 is preferably arranged coaxially (perpendicular to the plane of the figure) on.
  • the adjusting unit 21 or the annular slide 21 ' preferably has a ramp 22 arranged in the region of the switching device 10.
  • the adjusting unit 21 is preferably rotatable along its circumferential direction, in particular pivotable or deflectable, arranged such that the ramp 22 can interact with one of a plurality of, in the example shown, two valve pins 14 for opening the check valves 1 1 '.
  • the actuating unit 21 is preferably configured to displace the valve pins 14 substantially perpendicular to the circumferential direction of the actuating unit 21 by means of the ramp 22.
  • the check valves 11, 11 ' are designed as ball valves 15, so that a valve pin 14 can lift a ball 15' of a ball valve 15 from a valve seat 15 "of the ball valve 15.
  • the hydraulic medium can flow through a discharge channel 16 between the ball 15 and the valve seat 15 "flow through.
  • this is preferably connected to two actuators 23.
  • the two adjusting elements 23 engage substantially tangentially in the setting unit 21, so that a movement of the adjusting elements 23 along the arrows 23 'exerts a torque on the setting unit 21 and causes a rotation of the setting unit 21.
  • the adjusting elements 23 are actuated from outside the connecting rod by means of an actuating device (not shown).
  • the arrangement shown in FIGS. 1 a and 1 b makes it possible to transmit a switching pulse received by the adjusting elements 23, in particular around the large connecting rod eye 3, to the switching device 10, in particular a check valve 11.
  • FIG. 2 shows a second preferred exemplary embodiment of an actuating device 20 with an actuating unit 21.
  • the adjusting unit 21 is preferably arranged around a large connecting rod 3 of a (only partially shown) connecting rod 1 and formed as an annular slide 21 '.
  • the annular slide 21 ' has in particular a first semi-annular ring member 21 a and a second semi-annular ring member 21 b, which are preferably designed as identical parts and therefore are acceleration-neutral.
  • Between the ends of the ring elements 21 a, 21 b preferably engage the a small connecting rod (not shown) of the connecting rod 1 facing ends 24 of actuators 23, so that a displacement of the adjusting elements 23 along a Pleuell Kunststoffsachse X causes a rotation of the actuator 21.
  • first half-ring-shaped annular element 21 a is provided, which is arranged around a small connecting rod eye facing half of the large connecting rod 3 movable, in particular rotatable.
  • the small connecting rod eye (not shown) of the connecting rod 1 facing ends 24 of the actuating elements 23 with remote from the small connecting rod 2 ends 210 a, 21 1 a of the first semi-annular ring member 21 a act together and cause a rotation of the actuator 21st
  • This variant is indicated by the weaker line width of the second semi-annular ring element 21 b.
  • the adjusting elements 23 are guided by housing sleeves 9 of the connecting rod 1, which extend substantially parallel to the Pleuell Kunststoffsachse X.
  • the first and second ring member 21 a, 21 b in particular three, in each case in the circumferential direction of the adjusting unit 21 extending slots 25.
  • the adjusting unit 21, in particular the first and second ring member 21 a, 21 b are rotatably mounted on the connecting rod 1.
  • FIG. 3 shows a preferred exemplary embodiment of a switching device 10 with a ball valve 15.
  • a ball 15 'of the ball valve rests on a valve seat 15 "of the ball valve 15 and prevents the outflow of hydraulic fluid from a hydraulic chamber (not shown) through a drainage channel 16 in the direction of the arrow Ball 15 'secured by a securing spring 17 of the ball valve 15 on the valve seat 15 ".
  • the ball valve 15 can be opened by lifting the ball 15 from the valve seat 15 "in the direction of the discharge channel 16 by means of a valve pin 14.
  • the valve pin 14 preferably has a pin sleeve 14 'for lifting the ball 15' from the valve seat 15" and a pin plate 14 ", which are braced against each other by means of a disc spring 18.
  • the plate spring 18 dampens a portion of the loads acting on the valve pin 14, in particular on the pin sleeve 14 ', in particular in the direction of FIG Ball 15 'acting forces.
  • the actuation of the switching device 10, i. the movement of the valve pin 14 to open the ball valve 15 is preferably effected by the interaction of a ramp 22 of the actuator 21 with a collar 19 of the pin plate 14 "., the actuator unit 21 twists, ie the actuator unit 21 moves in a direction perpendicular to the plane of the figure , the collar 19 can be guided over the ramp 22 and the pin plate 14 "in the direction of the ball 15 'are moved.
  • the plate spring 18 is preferably stiff enough to the pin sleeve 14 'and the contacted by the pin sleeve 14' ball 15 'against the of the hydraulic medium in the drain channel 16 and by the securing spring 17 on the ball 15' pressure exerted by the valve seat 15th "take off.
  • FIGS. 4a and 4b show a first preferred embodiment of a locking device 30, which is adapted for fixing an adjusting device 20.
  • FIG. 4a shows a three-dimensional representation and
  • FIG. 4b shows a top view.
  • the locking device 30 preferably has a braced with a spring means 32 locking pin 31.
  • the locking pin 31 and the spring means 32 are arranged in a bore 33 of a connecting rod 1 partially shown.
  • the drilling tion 33 is preferably closed with a locking screw 34, against which the locking pin 31 is supported.
  • the locking pin 31 can be pressed into a locking recess 27 of the setting unit 21, as a result of which the setting unit 21 can be fixed in a setting state which preferably corresponds to a switching state of a switching device, not shown. If a sufficiently high torque is applied to the setting unit 21, the locking pin 31 can be pushed out of the locking recess 27 against a spring force of the spring means 32 and the setting unit 21 can be transferred into another setting state.
  • FIGS. 5a and 5b show a second preferred exemplary embodiment of a locking device 30, which is set up to fix an adjusting device 20.
  • Figure 5a shows a three-dimensional representation and Figure 5b is a plan view.
  • the locking device 30 preferably has a bracing locking pin 31, which is preferably arranged perpendicular to an actuating element 23 of an actuating device 20 and can engage in a locking recess 27 of the actuating element 23.
  • the locking recess 27 is formed in particular as a groove which, like the locking pin 31, preferably runs perpendicular to a connecting rod longitudinal axis X.
  • the locking pin 31 is preferably made of spring steel and deformable, in particular bendable formed. Acts on the actuator 23 is a sufficiently large force, for example, by a given outside of a connecting rod 1 shown actuating pulse, the locking pin 31 can be pushed out under tension from the locking pin 27, so that the actuator 23 along the Pleuellssensachse X move, especially in another setting state can be delivered.
  • Figure 6 shows a preferred embodiment of a portion of a length-adjustable connecting rod 1 with a switching device 10 and an adjusting device 20 in an exploded view.
  • the part of the connecting rod 1 shown has a large connecting rod eye 3 on, which is formed by two by means of a bearing cap 1 'secured bearing shells 3', wherein the bearing cap 1 'can be connected by two connecting rod 8 with the connecting rod 1.
  • the switching device 10 in particular two, actuatable by the actuator 20 check valves 1 1 'on. These are preferably arranged in a region of the Pleuelauges 3, which is the bearing cap 1 'opposite.
  • the adjusting device 20 preferably has an actuating unit 21 with a first half-ring-shaped ring member 21 a and a second semi-annular ring member 21 b, which surround the large connecting rod 3 and thereby an actuating pulse, in particular from a region of the large Pleuelauges 3, which the check valves 1 1 'opposite, can be transferred to the check valves 1 1'.
  • the first ring member 21 a preferably has a ramp (not shown) for actuating the check valves 1 1 'and is mounted by means of a guide plate 26' rotatably mounted on the connecting rod 1.
  • the second ring element 21 b preferably has three elongated holes 25 extending in the circumferential direction of the second ring element 21b, which can be penetrated by guide screws 26 for rotatable, in particular pivotable or deflectable, mounting of the second ring element 21b on the bearing cap 1 '.
  • the adjusting device 20 has two adjusting elements 23, wherein in each case a bearing cover 1 'facing away from end 24 of the adjusting elements 23 between one end of the first ring member 21 a and one end of the second ring member 21 b is arranged.
  • the bearing cap 1 has a region of through bores for receiving the connecting rod bolts 8 preferably each having a housing sleeve 9, which is adapted to is to receive an actuator 23 and to guide along the Pleuell Kunststoffsachse X slidably.
  • the connecting rod 1 preferably also has a locking device 30 for fixing the actuating device 20 in a setting state, in which, for example, an actuatable by the actuator 21 check valve 1 1 'remains open.
  • the length-adjustable connecting rod 1 also has a hydraulic piston (not shown), which is connected via a shaft (not shown) with a small connecting rod eye (not shown).
  • the small connecting rod eye is arranged on a large connecting rod 3 opposite end of the connecting rod 1.
  • the hydraulic piston is displaceably arranged in a hydraulic cylinder 6, so that hydraulic piston and hydraulic cylinder 6 form a first and second hydraulic chamber (not shown) which can be charged with a hydraulic medium.
  • the flow of the hydraulic medium into and out of the hydraulic chambers can be controlled in such a way that the hydraulic piston and thus the small connecting rod eye moves along the longitudinal axis Pleuell Kunststoffsachse X, whereby the total length of the connecting rod 1 changes.
  • the arrangement of the components of the connecting rod 1 or its embodiment shown in FIG. 6 is advantageously suitable for applying an actuating pulse to the actuating device 20 in the region of the large connecting rod 3, in particular in the region of a side of the large connecting rod 3 remote from the small connecting rod eye. in particular on at least one of the adjusting elements 23, is transmitted to the in the region of the large connecting rod 3, in particular in the region of the small connecting rod facing side of the large connecting rod 3, arranged switching device 10 to transmit.
  • FIG. 7 shows a first embodiment of an actuator 40 in an exploded view.
  • the actuating device 40 is designed as a switching rocker 41 and preferably has a rocker head 42 which is tiltably mounted on a rocking axis 43.
  • the rocker head 42 preferably has two active surfaces 44, which can be brought into engagement with an adjusting device, in particular two adjusting elements, of a length-adjustable connecting rod (not shown).
  • an actuating pulse is transmitted through one of the two active surfaces 44 on one of the two actuating elements, wherein the actuating pulse preferably depends on a tilted position of the rocker head 42 and is mediated.
  • the rocker head 42 can be spent by means of an actuator 45 in different tilt positions, each tilting position corresponds to a setting state of the adjusting device or a switching state of a switching device of the connecting rod (not shown) and thus a total length of the connecting rod.
  • the actuator 45 is preferably connected to a rocker arm 46 of the rocker head 42.
  • the actuator 45 can preferably be controlled hydraulically, pneumatically, electrically or by means of negative pressure.
  • FIG. 8 shows an embodiment of a device 100 for adjusting a compression ratio of an internal combustion engine with length-adjustable connecting rods 1 and an actuator 40 for actuating actuators 20 of the connecting rods 1 is shown.
  • the actuating device 40 is designed as a switching rocker 41, which is arranged in the region of a crankshaft 52 of the internal combustion engine.
  • the crankshaft 52 preferably carries four length-adjustable connecting rods 1, which pivotably rest on crankpins (not shown) of the crankshaft 52.
  • the switching rocker 41 is arranged on the crankshaft 52 in such a manner that actuating elements 23 of the adjusting devices 20 of the connecting rods 1 interact with active surfaces 44 of a rocker head 42 of the rocker 41 at one point of the predetermined trajectory.
  • actuating elements 23 of the adjusting devices 20 of the connecting rods 1 interact with active surfaces 44 of a rocker head 42 of the rocker 41 at one point of the predetermined trajectory.
  • rocker heads 42 To set the tilting position of the rocker heads 42, these preferably sit rotationally fixed or secured against rotation on a rocking axis 43.
  • the rocker axis 43 preferably has a rocker lever 46, which may be connected to an actuator 45 for setting the tilted position.
  • FIG. 9 shows a second exemplary embodiment of an actuating device 40 designed as a switching rocker 41.
  • a tilting position of rocker heads 42 of the rocker 41 which are preferably mounted pivotable or tiltable on a rocker axis 43, are adjusted by actuators 45, which are connected opposite of active surfaces 44 of the rocker heads 42 with the rocker heads of 42.
  • the rocker heads 42 can be spent independently in each case in a predetermined tilted position and thus the length of length-adjustable connecting rods on a crankshaft of an internal combustion engine can be adjusted individually.
  • FIG. 10 shows a third exemplary embodiment of an actuating device designed as a switching stage 53, which has in each case two actuating elements 47 for actuating an adjusting device of a length-adjustable connecting rod.
  • each of the actuating elements 47 has an active surface 44 for interaction with in each case one actuating element of the actuating device.
  • the actuating elements 47 are preferably movable in a direction perpendicular to eccentric axes 49 of the switching stage 53, in particular extendable, mounted.
  • the actuating elements 47 can preferably be arranged by means of eccentric elements 48 which are mounted in a rotationally fixed manner on the eccentric axes 49 and which each have an opposite side to the active surface 44 the actuators 47 interact, are moved from a retracted state to an extended state and vice versa.
  • the eccentric shafts 49 may be mechanically connected to each other, in particular via mutually engaged friction or gears 51st At least one of the friction or toothed wheels 51 can be connected to an actuator 45 in order to set the eccentric axes 49 in rotation and thus to control the movement or the retraction and / or extension of the actuating elements 47.
  • FIG. 11 shows an oil scheme for a hydraulically switched switching mechanism for the rocker switch according to FIG. 9.
  • the rocker switch is hydraulically connected via actuator pistons (multiple actuators).
  • FIG. 12 shows an oil scheme for a hydraulically switched shift mechanism for the shift paddles according to FIG. 8.
  • the shift paddles are arranged on a common shaft. The adjustment is made by a hydraulic actuator (Einzelaktuator).
  • Fig. 1 1 denotes (5) a hydraulic single actuator for the shift paddles, (6) the shift paddles, (7) a mechanically actuated VCR connecting rod and (8) an oil pan.
  • FIG. 13 shows an oil scheme for a hydraulically switched shift mechanism for the shift paddles according to FIG. 10. There are separate shift paddles per shift pin. The adjustment is made by a hydraulic actuator (Einzelaktuator).
  • Figure 14 shows an electrical switching mechanism for the shift paddles of FIG. 8.
  • the shift paddles are arranged on a common shaft. The adjustment is made by an electric actuator (Einzelaktuator).
  • FIG. 15 shows an electrical switching mechanism for the shift paddles according to FIG. 10. There are separate shift paddles per shift pin. The adjustment is made by an electric actuator (Einzelaktuator). The designations correspond to those of FIG. 14.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)

Abstract

L'invention concerne une bielle à longueur variable, un dispositif pour régler un rapport de compression et un moteur à combustion interne. L'invention concerne une bielle à longueur variable comprenant un pied de bielle et une tête de bielle et comportant de préférence un dispositif de commutation. De préférence, ce dispositif de commutation est conçu pour commander, en particulier hydrauliquement, la longueur de ladite bielle. En outre, cette bielle comprend de préférence un dispositif de réglage qui peut être actionné, en particulier mécaniquement, de l'extérieur de la bielle, qui présente une unité de réglage montée rotative et qui est conçu pour commuter mécaniquement, en particulier actionner, le dispositif de commutation, par rotation de l'unité de commande.
PCT/EP2017/063231 2016-05-31 2017-05-31 Bielle à longueur variable, dispositif de réglage d'un rapport de compression et moteur à combustion interne WO2017207671A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN201780047661.1A CN110114566B (zh) 2016-05-31 2017-05-31 长度可调的连杆，用于调节压缩比的设备和内燃机
DE112017002716.0T DE112017002716A5 (de) 2016-05-31 2017-05-31 Längenverstellbare pleuelstange, vorrichtung zum einstellen eines verdichtungsverhältnisses und brennkraftmaschine
US16/306,007 US10876474B2 (en) 2016-05-31 2017-05-31 Length-adjustable connecting rod, device for setting a compression ratio and internal combustion engine

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
ATA50490/2016A AT519011B1 (de) 2016-05-31 2016-05-31 Hubkolbenmaschine
ATA50490/2016 2016-05-31
ATA50600/2016A AT518683B1 (de) 2016-05-31 2016-07-06 Hubkolbenmaschine
ATA50600/2016 2016-07-06

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WO2017207671A1 true WO2017207671A1 (fr) 2017-12-07

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PCT/AT2017/060144 WO2017205889A1 (fr) 2016-05-31 2017-05-31 Machine à pistons alternatifs

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PCT/AT2017/060144 WO2017205889A1 (fr) 2016-05-31 2017-05-31 Machine à pistons alternatifs

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT521676B1 (de) * 2018-10-08 2020-04-15 Avl List Gmbh Längenverstellbare Pleuelstange mit mechanisch betätigbarem Ventil

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019100952A1 (de) * 2019-01-15 2020-07-16 ECO Holding 1 GmbH Verstelleinrichtung zum Betätigen eines Umschaltventils einer Brennkraftmaschine mit variabler Verdichtung sowie Verfahren zum Herstellen einer Verstelleinrichtung

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19703948C1 (de) * 1997-02-03 1998-06-18 Meta Motoren Energietech Vorrichtung zur Veränderung der Verdichtung einer Hubkolbenbrennkraftmaschine
US20090107467A1 (en) * 2007-10-31 2009-04-30 Berger Alvin H Variable compression ratio engine with lost motion coupling
US20130247879A1 (en) * 2012-03-23 2013-09-26 Michael von Mayenburg Combustion engine with stepwise variable compression ratio (svcr)
WO2015055582A2 (fr) * 2013-10-18 2015-04-23 Avl List Gmbh Bielle réglable en longueur

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2989954A (en) * 1959-09-21 1961-06-27 Continental Motors Corp Internal-combustion engine
JP4464916B2 (ja) * 2005-12-28 2010-05-19 本田技研工業株式会社 ピストンにおける油圧アクチュエータの制御装置
DE102013113432B4 (de) * 2013-12-04 2022-02-24 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Umschaltventileinheit und Verbrennungsmotor mit einer solchen Umschaltventileinheit

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19703948C1 (de) * 1997-02-03 1998-06-18 Meta Motoren Energietech Vorrichtung zur Veränderung der Verdichtung einer Hubkolbenbrennkraftmaschine
US20090107467A1 (en) * 2007-10-31 2009-04-30 Berger Alvin H Variable compression ratio engine with lost motion coupling
US20130247879A1 (en) * 2012-03-23 2013-09-26 Michael von Mayenburg Combustion engine with stepwise variable compression ratio (svcr)
WO2015055582A2 (fr) * 2013-10-18 2015-04-23 Avl List Gmbh Bielle réglable en longueur

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT521676B1 (de) * 2018-10-08 2020-04-15 Avl List Gmbh Längenverstellbare Pleuelstange mit mechanisch betätigbarem Ventil
AT521676A4 (de) * 2018-10-08 2020-04-15 Avl List Gmbh Längenverstellbare Pleuelstange mit mechanisch betätigbarem Ventil

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