DE102013224270B3 - Device for changing the compression ratio of a cylinder unit of a reciprocating internal combustion engine - Google Patents

Device for changing the compression ratio of a cylinder unit of a reciprocating internal combustion engine Download PDF

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Publication number
DE102013224270B3
DE102013224270B3 DE102013224270.0A DE102013224270A DE102013224270B3 DE 102013224270 B3 DE102013224270 B3 DE 102013224270B3 DE 102013224270 A DE102013224270 A DE 102013224270A DE 102013224270 B3 DE102013224270 B3 DE 102013224270B3
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Germany
Prior art keywords
piston
rod
piston rod
adjusting
actuating tab
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Revoked
Application number
DE102013224270.0A
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German (de)
Inventor
Markus POPP
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Schaeffler Technologies AG and Co KG
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Schaeffler Technologies AG and Co KG
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02BINTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00Other engines
    • F02B75/04Engines with variable distances between pistons at top dead-centre positions and cylinder heads
    • F02B75/045Engines with variable distances between pistons at top dead-centre positions and cylinder heads by means of a variable connecting rod length
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D15/00Varying compression ratio
    • F02D15/02Varying compression ratio by alteration or displacement of piston stroke
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C23/00Bearings for exclusively rotary movement adjustable for aligning or positioning
    • F16C23/10Bearings, parts of which are eccentrically adjustable with respect to each other
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C7/00Connecting-rods or like links pivoted at both ends; Construction of connecting-rod heads
    • F16C7/06Adjustable connecting-rods
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2360/00Engines or pumps
    • F16C2360/22Internal combustion engines

Abstract

A device for changing the compression ratio of a cylinder unit of a reciprocating internal combustion engine is provided on a connecting rod eye (5) of a connecting rod (1), wherein on the connecting rod eye (5) a pivotable with at least one actuating tab (10, 19) provided adjusting element (9) is arranged and on the actuating tab (10, 19) one end of a piston rod (11, 20) hingedly engages. The actuating tab (10, 19) is connected at its other end with a within a bore (33, 34) of the connecting rod (1) longitudinally displaceably arranged actuating piston (31, 32). To create a suitable for mass production training of the articulation of the piston rod on the adjusting element, which is inexpensive to produce and leads to a simplification of the assembly process is on the actuating tab (10, 19) and / or in the adjusting piston (31, 32) in the direction the end of the piston rod (11, 20) open (12, 21, 35, 36) provided with a sliding surface (13, 22, 37, 38) is provided, wherein the sliding surface (13, 22, 37, 38) curved uniformly is formed and the end of the piston rod (11, 20) to the shape of the lateral surface of the receptacle (12, 21, 35, 36) is adapted.

Description

  • The invention relates to a device for varying the compression ratio of a cylinder unit of a reciprocating internal combustion engine, which is provided on a connecting rod eye of a connecting rod, on which a pivotable with at least one actuating tab provided adjusting element is arranged and on the actuating tab one end of a piston rod hingedly engages which its other end is connected to a longitudinally displaceable within a bore of the connecting rod arranged adjusting piston.
  • Field of the invention
  • In reciprocating internal combustion engine, the ratio of the volume of the entire cylinder chamber to that of the compression chamber is designated by the compression ratio ε. As is known, by increasing the compression ratio, the efficiency of the reciprocating internal combustion engine can be increased and consequently the overall fuel consumption can be reduced. With an increase in the compression ratio, however, the knock tendency increases in spark-ignited internal combustion engines in full-load operation, which is an uncontrolled auto-ignition of the fuel-air mixture. In contrast, the compression ratio in the part-load operation, in which the filling is lower, could be increased to improve the partial load efficiency, without thereby the knocking would occur. As a result, it is expedient to operate the reciprocating internal combustion engine in part-load operation with a relatively high compression ratio and in full load operation with respect to this reduced compression ratio.
  • For supercharged reciprocating internal combustion engines with spark ignition, a change in the compression ratio is generally advantageous, given that in terms of the overall charge, a low compression ratio is given. In addition, it is possible to change the compression ratio as a function of other operating parameters of the reciprocating internal combustion engine, such. B. driving conditions of the motor vehicle, operating points of the internal combustion engine, signals of a knock sensor, exhaust emissions, etc.
  • There are known from the prior art devices in which the position of the piston to the crankshaft is variable to change the compression ratio. According to one of these solutions, the connecting rod is connected to the piston via an adjustable eccentric body provided on the connecting rod eye. As a rule, the eccentric body is designed as a shaft journal which can be rotated in the connecting rod eye and receives a piston pin in an eccentric bore via a piston pin bearing.
  • A device of the type described in the preamble of claim 1 is known from DE 10 2011 002 138 A1 known. The previously known connecting rod is trapezoidal in order to achieve a weight saving in the region of its connecting rod. An adjusting element embodied as a two-armed lever, which is non-rotatably connected to an eccentric body, has tabs on which piston rods are articulated via bolts. It is according to the 5 This document provides a fork-shaped element at one end of each of these piston rods, which surrounds the adjusting element designed as a flat component.
  • A generic device is also from the DE 10 2005 055 199 A1 known.
  • Object of the invention
  • The invention has for its object to provide a suitable for large-scale production training of the articulation of the piston rod on the adjusting element, which is inexpensive to produce and leads to a simplification of the assembly process. In addition, the weight of the adjustment should be reduced.
  • Summary of the invention
  • This object is achieved on the basis of the preamble of patent claim 1, in conjunction with its characterizing features.
  • According to the characterizing part of claim 1 to be provided on the actuating tab and / or in the actuating piston open towards the end of the piston rod provided with a sliding surface recording, wherein the sliding surface is formed evenly curved and the end of the piston rod to the shape of the lateral surface of the Recording is adjusted. The device for changing the compression ratio of the cylinder unit of a reciprocating internal combustion engine preferably has an eccentric body which is rotatably mounted in the connecting rod eye and is rotatably connected to the adjusting element having at least one actuating lug and can be rotated about its longitudinal central axis.
  • Instead of the known articulation of the piston rod on the lug of the adjusting element and on the adjusting piston, in which on the one hand a flap-facing end piece of the piston rod fork-shaped and on the other hand, the adjusting piston end facing formed with a transverse bore and the ends in each case by means of a bolt Receiving bore of the tab and receiving bores of the actuating piston are guided, can be dispensed according to the invention to a corresponding end piece and a connection by means of separate bolts. For this purpose, the recordings provided with sliding surfaces each have an end of the piston rod adapted to their contour. Consequently, the assembly of the adjusting element on the connecting rod can be considerably simplified because during assembly no longer the receiving bore in the tab with corresponding holes at the end of the piston rod is to bring into line. The same applies to the transverse bore of the piston rod and the receiving bores of the corresponding actuating piston. In addition, the weight of the device can be reduced because it dispenses with a corresponding fork-shaped end piece.
  • In contrast, after the DE 10 2011 002 138 A1 , in particular from the 5 shows, provided on each of the two piston rods, a fork-shaped element and the piston rods are connected via bolts to the actuating piston, whereby a higher assembly cost is required and due to the associated increase in weight, the moving masses are increased.
  • In a further embodiment of the invention, the sliding surface should be cylindrical, wherein a longitudinal center axis of this sliding surface after assembly of the adjusting element in the connecting rod extends parallel to the longitudinal center axis of the connecting rod. Thus, the recordings can be designed semicircular both on the actuating tab and in the actuating piston. The interacting with these ends of the respective piston rod are in this case also adapted to be adapted to the contour of the receptacle sections cylindrical. This results in an advantageous line contact between the ends of the piston rod and the partially cylindrical shaped sliding surfaces. Alternatively, it is possible to form the receptacles each as a spherical dome, in which the end portion of the piston rod is guided due to its spherical configuration.
  • Furthermore, it is proposed to form the piston rod in its end facing the corresponding receptacle with a circular shaped end portion, wherein this has a transverse to the longitudinal axis of the piston rod center axis. This end portion should be formed integrally with the piston rod. Therefore, in this case, it is possible to manufacture the piston rod and the circular end portion as a common fine blanking or fine blanking part, so that overall the manufacturing cost can be significantly reduced in view of mass production of the compression ratio changing apparatus.
  • In addition, the invention provides to fix the end of the piston rod via a retaining clip on the actuating tab. In this case, the retaining clip may be formed either as a wire clip or a sheet metal clip and engage over the actuating tab in its end portion. The end of the piston rod, which is connected to the actuating piston, is fixed to this preferably by means of a arranged in the edge region of the piston skirt in a groove retaining ring. Alternatively, there is also the possibility to provide the retaining clip in the edge region of the receptacle even when receiving the actuating tab, wherein the end or both ends of the Kol rod snapped through the retaining clip and the locking ring into the receptacle and then engaged behind the circumference.
  • In an embodiment of the retaining clip as a wire clip, in which it engages over the actuating tab, it may be guided in a groove of the actuating tab and engage with their ends in a lying on the central axis of the circular end portion of the piston rod recess. The spring-biased wire clamp thus engages in the recesses or in a through bore in such a way that a secure fixation of the end of the piston rod is provided in the receptacle. When using a sheet metal clip, which is preferably designed U-shaped, a pin is guided by the legs, which is pressed into a through hole in the circular shaped end portion of the piston rod and can rotate relative to the sheet metal clamp. The sheet metal clamp can be made of a spring steel and is in this case with its two legs resiliently against the end faces of the adjusting element.
  • The invention is not limited to the specified combination of the features of claim 1 with the features of the dependent claims therefrom. There are also opportunities to combine individual features, as far as they emerge from the patent claims, the advantages of the claims, the following description of the embodiments or at least from the drawings. The reference of the claims to the drawing by corresponding use of reference numerals is not intended to limit the scope of the claims.
  • Short description of the drawing
  • For further explanation of the invention reference is made to the drawing, in the two Embodiments are shown simplified. Show it:
  • 1 a perspective view of a provided with an adjusting device according to the invention for varying the compression ratio of a reciprocating internal combustion engine piston rod,
  • 2 an enlarged section II from the in the 1 shown connecting rods,
  • 3 a longitudinal section through the in the 1 illustrated connecting rod without bearing cap of a connecting rod bearing eye,
  • 4 a view of one in the connecting rod after the 1 used eccentric body together with an adjusting element and piston rods and arranged on these adjusting piston,
  • 5 a perspective view of the arrangement according to the 4 .
  • 6 an enlarged section VI of the arrangement according to the 4 with a longitudinal section through the correspondingly illustrated components,
  • 7 a further embodiment of a fixation of the piston rods on the adjusting element, wherein the retaining clips are formed as sheet metal clips, and
  • 8th an enlarged detail VIII of the arrangement according to the 7 ,
  • Detailed description of the drawing
  • In the 1 a basic structure of an adjusting device provided on a connecting rod is shown. It is with 1 a connecting rod of a reciprocating internal combustion engine refers to a connecting rod bearing eye 2 for the arrangement of the connecting rod 1 has on a crank pin of a crankshaft, not shown. The connecting rod eye 2 is doing through the connecting rod 1 and a bearing cap 3 educated. From the connecting rod eye 2 leads a connecting rod shaft 4 to a connecting rod eye 5 which is a piston pin bearing 6 receives. This piston pin bearing 6 serves to receive a piston pin, not shown, to which a piston of a corresponding cylinder unit is fixed, the latter components are also not shown.
  • Like from the 1 is apparent in the area of the connecting rod eye 5 an adjusting device 7 for changing a compression ratio of the cylinder unit, which in this connecting rod 1 is used provided. For this purpose, the connecting rod eye 5 formed with a larger inner diameter and takes an eccentric body 8th on. Because within this eccentric body 8th the piston pin bearing 6 is arranged, can its position relative to the connecting rod 1 adjust. Furthermore, the eccentric body 8th for its adjustment, an adjustment 9 with an actuating tab visible in the illustration 10 on, on the one piston rod 11 attacks.
  • Like from the 1 in conjunction with the 2 shows, the tab points 16 of the adjusting element 9 one in the direction of the piston rod 11 open recording 12 on. This recording 12 is due to its contour with a cylindrical sliding surface 13 provided, at which the corresponding end of the piston rod 11 supported. Furthermore goes from the 1 and 2 apparent that the piston rod 11 has a rectangular cross section and at its the recording 12 facing end with a circular shaped end portion 14 is provided. This is the end of the piston rod 11 to the contour of the picture 12 customized. Furthermore, it can be seen that this circular shaped end portion 14 the piston rod 11 a recess located on the central axis thereof 15 has, in the one as a wire clip 16 trained retaining clip with an end bracket 17 intervenes. The wire clip engages over the actuating tab 10 and is in a provided on this groove 18 guided.
  • Furthermore, goes from the 3 apparent that the adjusting element 9 another operating tab 19 has, at the a piston rod 20 is articulated. The articulation of the piston rod 20 on the operating tab 19 of the adjusting element 9 takes place in the same way as in connection with the actuating tab 10 and the piston rod 11 described. In this case, this actuating tab 19 a recording 21 with a cylindrical sliding surface 22 on. In this recording 21 or in the cylindrical sliding surface 22 is a circular trained end portion 23 the piston rod 20 pivotally guided. Incidentally, this operating tab 19 also a groove 24 with an extending in this wire clip 25 on.
  • Furthermore, goes from the 3 apparent that the adjusting element 9 about a gearing 26 rotatably with the eccentric body 8th is connected, wherein the adjusting element 9 , like from the 1 and 2 shows, between cheeks 27 and 28 in which the eccentric body 8th is stored, is arranged. Of the 3 it can also be seen that each of the two piston rods 11 and 20 at her from the adjustment 9 opposite end an end portion 29 respectively. 30 having, with respect to its shape with the two end portions 14 such as 23 matches. At these end sections 29 and 30 are adjusting pistons 31 such as 32 from the piston rods 11 and 20 added. The adjusting piston 31 is in a cylinder 33 guided and acted upon with pressure medium, wherein the actuating piston 31 in the representation assumes an end position in which he furthest within the cylinder 33 is moved.
  • In contrast, there is the actuator piston 32 within the associated cylinder 34 in his basic position. The control of the position of these two adjusting pistons by means of a control valve, not shown, in a in the 3 illustrated transverse bore 35 is arranged. Furthermore, each of the actuator piston 31 and 32 , the respective piston rod 11 respectively. 20 facing, a shot 35 respectively. 36 on, which also has a cylindrical sliding surface 37 respectively. 38 in which the two cylindrical end portions 29 and 30 are guided. Here is the piston rod 11 on the adjusting piston 31 by means of a retaining ring 39 fixed while in an identical manner on the actuator piston 32 for fixing the pivotally hinged piston rod 20 a circlip 40 is provided.
  • From the 4 and 5 the training goes out of the eccentric body 8th , the adjusting element 9 , the piston rods 11 and 20 and the actuator piston 31 and 32 existing unit. This is pre-assembled, on the one hand between the cheeks 27 and 28 of the connecting rod eye 5 (please refer 1 and 2 ) and on the other hand inside the cylinders 33 and 34 (please refer 3 ) to be mounted. From the 5 In particular, the training of the two piston rods 11 and 20 with rectangular cross section.
  • The 6 shows as a sectional view of an enlarged section VI in 4 as an example of the arrangement of the piston rod 20 , on the one hand by means of their circular shaped end section 23 in the cylindrical sliding surface 22 the recording 21 abuts and over there in the groove 24 led wire clip 25 is held. Also, this circular shaped end portion 23 has a recess 41 on. Furthermore, goes from the 6 show that, as already stated, the piston rod 20 opposite the actuator piston 32 can perform a pivoting movement, what on the one hand, the circular shaped end portion 30 and on the other hand, the cylindrical sliding surface 38 the recording 36 on the adjusting piston 32 are provided. It can also be seen that the adjusting piston 32 with the in an annular groove 42 arranged circlip 40 is provided.
  • According to the 7 and 8th are the holding elements as U-shaped sheet metal clamps 43 and 44 formed, which preferably consist of a spring steel. In this case, in the central axis of the respective circular end portion 14 respectively. 23 the piston rods 11 and 20 provided a through hole. In these through holes are bolts 45 and 46 pressed into holes 47 and 48 the sheet metal clamps 43 and 44 run with play. Furthermore, in contrast to the previously explained embodiment of the 1 to 6 after the 7 and 8th the two piston rods 11 and 20 at its lower ends by means of bolts 49 and 50 to the actuator piston 31 and 32 fixed. These are each in a through hole of the corresponding piston rod 11 respectively. 20 pressed in and run with play in holes 51 and 52 , Of course, the adjusting pistons 31 and 32 also according to the 1 to 6 with the piston rods 11 and 20 be connected.
  • As can be seen from the figures explained above, the two piston rods can be 11 and 20 with little manufacturing and assembly costs pivotable on the tabs 10 and 19 as well as the adjusting piston 31 and 32 to lead. In this case, this type of training of the pivot bearing also has the advantage that it can be realized with comparatively very low weight, so that can reduce the moving masses.
  • LIST OF REFERENCE NUMBERS
  • 1
    pleuel
    2
    Pleuellagerauge
    3
    bearing cap
    4
    connecting rod shaft
    5
    connecting rod
    6
    Piston pin bearing
    7
    adjustment
    8th
    eccentric
    9
    adjustment
    10
    operating tab
    11
    piston rod
    12
    admission
    13
    Cylindrical sliding surface of 12
    14
    Circular end section of 11
    15
    Recess of 14
    16
    wire clamp
    17
    hanger
    18
    groove
    19
    operating tab
    20
    piston rod
    21
    Recording of 19
    22
    Cylindrical sliding surface of 21
    23
    Circular end section of 20
    24
    Groove of 19
    25
    wire clamp
    26
    gearing
    27
    cheek
    28
    cheek
    29
    Circular end section
    30
    Circular end section
    31
    actuating piston
    32
    actuating piston
    33
    cylinder
    34
    cylinder
    35
    admission
    36
    admission
    37
    Cylindrical sliding surface
    38
    Cylindrical sliding surface
    39
    circlip
    40
    circlip
    41
    Recess of 23
    42
    ring groove
    43
    cleat
    44
    cleat
    45
    bolt
    46
    bolt
    47
    drilling
    48
    drilling
    49
    bolt
    50
    bolt
    51
    drilling
    52
    drilling

Claims (10)

  1. Device for varying the compression ratio of a cylinder unit of a reciprocating internal combustion engine, which is connected to a connecting rod ( 5 ) of a connecting rod ( 1 ) is provided, on which a pivotable with at least one actuating tab ( 10 . 19 ) provided adjusting element ( 9 ) is arranged and on the actuating tab ( 10 . 19 ) one end of a piston rod ( 11 . 20 ) hingedly engages which at its other end with a within a bore ( 33 . 34 ) of the connecting rod ( 1 ) longitudinally displaceably arranged adjusting piston ( 31 . 32 ), characterized in that on the actuating tab ( 10 . 19 ) and / or in the adjusting piston ( 31 . 32 ) one in the direction of the end of the piston rod ( 11 . 20 ) open with a sliding surface ( 13 . 22 . 37 . 38 ) ( 12 . 21 . 35 . 36 ) is provided, wherein the sliding surface ( 13 . 22 . 37 . 38 ) is formed evenly curved and the end of the piston rod ( 11 . 20 ) to the shape of the lateral surface of the receptacle ( 12 . 21 . 35 . 36 ) is adjusted.
  2. Device according to claim 1, characterized in that the sliding surface ( 13 . 22 ) cylindrical with a parallel to the longitudinal center axis of the connecting rod ( 5 ) extending longitudinal central axis is formed.
  3. Device according to claim 2, characterized in that the piston rod ( 11 . 20 ) has a rectangular cross-section.
  4. Device according to claim 3, characterized in that the piston rod ( 11 . 20 ) at her recording ( 12 . 21 . 35 . 36 ) facing end in a circular shaped end portion ( 14 . 23 . 29 . 30 ), wherein this one transverse to the longitudinal axis of the piston rod ( 11 . 20 ) has extending central axis.
  5. Device according to claim 4, characterized in that the piston rod ( 11 . 20 ) and the circular end portion ( 14 . 23 . 29 . 30 ) are produced together as fineblanking part.
  6. Device according to claim 1, characterized in that the end of the piston rod ( 11 . 20 ) via a retaining clip on the actuating tab ( 10 . 19 ) and / or on the adjusting piston ( 31 . 32 ) is fixed.
  7. Device according to claim 6, characterized in that the retaining clip as a wire clip ( 16 . 25 ) is trained.
  8. Device according to claim 7, characterized in that the wire clip ( 16 . 25 ) the actuating tab ( 10 . 19 ) overlaps.
  9. Device according to claim 8, characterized in that the wire clip ( 16 . 25 ) in a groove ( 18 . 24 ) of the actuating tab ( 10 . 19 ) is guided and with their ends in on the central axis of the circular end portion ( 14 . 23 ) of the piston rod ( 11 . 20 ) recesses ( 15 . 41 ) intervenes.
  10. Device according to claim 1, characterized in that one end of the piston rod ( 11 . 20 ) via a retaining ring ( 39 . 40 ) in the recording ( 35 . 36 ) of the adjusting piston ( 21 . 32 ) is fixed.
DE102013224270.0A 2013-11-27 2013-11-27 Device for changing the compression ratio of a cylinder unit of a reciprocating internal combustion engine Revoked DE102013224270B3 (en)

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Application Number Priority Date Filing Date Title
DE102013224270.0A DE102013224270B3 (en) 2013-11-27 2013-11-27 Device for changing the compression ratio of a cylinder unit of a reciprocating internal combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102013224270.0A DE102013224270B3 (en) 2013-11-27 2013-11-27 Device for changing the compression ratio of a cylinder unit of a reciprocating internal combustion engine

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2536807A (en) * 2015-03-05 2016-09-28 Porsche Ag Connecting rod and internal combustion engine
WO2016169670A1 (en) * 2015-04-22 2016-10-27 Hilite Germany Gmbh Insert and connecting rod for a variable compression of an internal combustion engine
DE102015213278A1 (en) 2015-07-15 2017-01-19 Schaeffler Technologies AG & Co. KG Device for changing the compression ratio of a cylinder unit of a reciprocating internal combustion engine
DE102016206253A1 (en) 2016-04-14 2017-10-19 Schaeffler Technologies AG & Co. KG fuse element
WO2017198615A1 (en) * 2016-05-17 2017-11-23 ECO Holding 1 GmbH Connecting rod for an internal combustion engine having variable compression
WO2017202773A1 (en) * 2016-05-25 2017-11-30 ThyssenKrupp Metalúrgica Campo Limpo Ltda. Connecting rod for an internal combustion engine with adjustable compression ratio
DE102017113113A1 (en) 2017-06-14 2018-12-20 Schaeffler Technologies AG & Co. KG Connecting rod of a reciprocating internal combustion engine
DE102017117028A1 (en) * 2017-07-27 2019-01-31 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Connecting rod and internal combustion engine
DE102018107057A1 (en) * 2017-12-20 2019-06-27 ECO Holding 1 GmbH Connecting rod for a variable compression internal combustion engine

Citations (2)

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Publication number Priority date Publication date Assignee Title
DE102005055199A1 (en) * 2005-11-19 2007-05-24 Fev Motorentechnik Gmbh Reciprocating internal combustion engine e.g. commercial vehicle diesel engine, has eccentric tappet moved along length of piston rod, where changeable resistor affects adjustment movement of tappet and effects adjustment movement of tappet
DE102011002138A1 (en) * 2011-04-18 2012-10-18 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Adjustable connecting rod assembly for internal combustion engine of motor vehicle, has connecting section whose angular sector is smaller than angular sector of the adjustable eccentric cam device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005055199A1 (en) * 2005-11-19 2007-05-24 Fev Motorentechnik Gmbh Reciprocating internal combustion engine e.g. commercial vehicle diesel engine, has eccentric tappet moved along length of piston rod, where changeable resistor affects adjustment movement of tappet and effects adjustment movement of tappet
DE102011002138A1 (en) * 2011-04-18 2012-10-18 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Adjustable connecting rod assembly for internal combustion engine of motor vehicle, has connecting section whose angular sector is smaller than angular sector of the adjustable eccentric cam device

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2536807A (en) * 2015-03-05 2016-09-28 Porsche Ag Connecting rod and internal combustion engine
US9976593B2 (en) 2015-03-05 2018-05-22 Dr. Ing. H.C.F. Porsche Aktiengesellschaft Connecting rod and internal combustion engine
GB2536807B (en) * 2015-03-05 2017-06-07 Porsche Ag Adjustable length connecting rod with hydraulic pistons
WO2016169670A1 (en) * 2015-04-22 2016-10-27 Hilite Germany Gmbh Insert and connecting rod for a variable compression of an internal combustion engine
DE102015213278A1 (en) 2015-07-15 2017-01-19 Schaeffler Technologies AG & Co. KG Device for changing the compression ratio of a cylinder unit of a reciprocating internal combustion engine
DE102016206253A1 (en) 2016-04-14 2017-10-19 Schaeffler Technologies AG & Co. KG fuse element
WO2017198615A1 (en) * 2016-05-17 2017-11-23 ECO Holding 1 GmbH Connecting rod for an internal combustion engine having variable compression
WO2017202773A1 (en) * 2016-05-25 2017-11-30 ThyssenKrupp Metalúrgica Campo Limpo Ltda. Connecting rod for an internal combustion engine with adjustable compression ratio
DE102017113113A1 (en) 2017-06-14 2018-12-20 Schaeffler Technologies AG & Co. KG Connecting rod of a reciprocating internal combustion engine
DE102017117028A1 (en) * 2017-07-27 2019-01-31 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Connecting rod and internal combustion engine
DE102018107057A1 (en) * 2017-12-20 2019-06-27 ECO Holding 1 GmbH Connecting rod for a variable compression internal combustion engine

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