JP2005528551A - Device for adjusting the relative angle between two rotating elements - Google Patents

Device for adjusting the relative angle between two rotating elements Download PDF

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JP2005528551A
JP2005528551A JP2004509242A JP2004509242A JP2005528551A JP 2005528551 A JP2005528551 A JP 2005528551A JP 2004509242 A JP2004509242 A JP 2004509242A JP 2004509242 A JP2004509242 A JP 2004509242A JP 2005528551 A JP2005528551 A JP 2005528551A
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rotor
rotating elements
electric actuator
rotating
actuator
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JP4370244B2 (en
JP2005528551A5 (en
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ガイスベルグ−ヘルフェンベルグ アレクサンダー・フォン
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Mercedes Benz Group AG
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Daimler AG
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    • 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
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • 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
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • 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
    • F01L2800/12—Fail safe operation

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

本発明は、伝動要素を介して接続される２つの回転する駆動接続された要素間の相対的角度調整を行う装置に関する。前記伝動要素は、電動アクチュエータの回転子によって作用を受ける設定シャフトを具備し、回転要素に対しその位置を変更することで、これらの回転要素の相対的角度位置を変更できる。本発明の目的は、アクチュエータが低電力消費であり、その装置が確実な緊急動作を有する、２つの回転要素間の相対的角度調整を行う装置を設計することである。この目的を達成するために、本発明は、設定シャフトが回転要素の少なくとも一方に自発的に接続されることを提案している。The invention relates to a device for adjusting the relative angle between two rotating drive-connected elements connected via a transmission element. The transmission element includes a setting shaft that is acted on by the rotor of the electric actuator, and the relative angular position of the rotation elements can be changed by changing the position of the transmission elements. The object of the present invention is to design a device for adjusting the relative angle between two rotating elements, in which the actuator has a low power consumption and the device has a reliable emergency action. In order to achieve this object, the present invention proposes that the setting shaft is spontaneously connected to at least one of the rotating elements.

Description

本発明は、請求項１の前文に従い、駆動対象に接続される２つの回転要素間の相対的角度調整を行う装置に関する。   The invention relates to a device for adjusting the relative angle between two rotating elements connected to a driven object in accordance with the preamble of claim 1.

前述のタイプの装置は、例えば、内燃機関においては公知であり、カムシャフトを駆動するクランクシャフトに対するカムシャフトの相対的角度調整を行うために提供される。バルブ駆動に用いるこの装置は、リミットの範囲内で可変的にバルブ開口の位相角、開口期間およびバルブストロークに影響を与える。   Devices of the aforementioned type are known, for example, in internal combustion engines and are provided for adjusting the relative angle of the camshaft with respect to the crankshaft that drives the camshaft. This device used to drive the valve variably affects the valve opening phase angle, opening duration and valve stroke within limits.

特許文献１は、内燃機関のカムシャフトとクランクシャフトとの間の相対的角度調整を行う一般的なタイプの装置を開示する。チェインホイールは、クランクシャフトのドライブ内のカムシャフトに割り当てられ、前記チェインホイールは、伝動要素を介してカムシャフトを駆動する。その伝動要素は、２つの回転要素の相対的角度位置を変更することができるようにする。この変化は、電動アクチュエータによってもたらされ、その回転子が伝動要素の作動シャフトに作用し、その装置の各動作状況において回転する。   Patent Document 1 discloses a general type device that adjusts a relative angle between a camshaft and a crankshaft of an internal combustion engine. A chain wheel is assigned to the camshaft in the drive of the crankshaft, said chainwheel driving the camshaft via a transmission element. The transmission element makes it possible to change the relative angular position of the two rotating elements. This change is brought about by the electric actuator, whose rotor acts on the actuating shaft of the transmission element and rotates in each operating situation of the device.

振動によって引き起こされる慣性力が作動要素の回転子または伝動要素の作動シャフトに作用すると、望ましくない相対的角度位置の調整が必要になる。これは、アクチュエータによって補正されなければならず、継続的なエネルギーの適用が必要となる。アクチュエータが故障すると、この機能は、もはや可能でなくなり、制御不能な調整が起こり、このことにより内燃機関の操作が難しくなり、しいては内燃機関の損傷につながる。アクチュエータも継続的に回転しなければならないので、それも通常動作中に受け入れられないほど加熱させる恐れがある。このような場合、電動アクチュエータへの損傷を防ぐために内燃機関の動作を停止させなければならなかった。   When inertial forces caused by vibrations act on the actuating element rotor or transmission element actuating shaft, an undesirable relative angular position adjustment is required. This must be corrected by the actuator, requiring continuous energy application. If the actuator fails, this function is no longer possible and uncontrollable adjustments occur, which makes the operation of the internal combustion engine difficult and leads to damage to the internal combustion engine. Since the actuator must also rotate continuously, it can also heat up unacceptably during normal operation. In such a case, the operation of the internal combustion engine had to be stopped in order to prevent damage to the electric actuator.

一般的な技術背景に対し特許文献２および特許文献３も引用される。   Patent Document 2 and Patent Document 3 are also cited for general technical background.

独国特許出願公開第１００ ３６ ２７５ Ａ１号明細書German Patent Application Publication No. 100 36 275 A1 独国特許出願公開第１００ ３８ ３５４ Ａ１号明細書German Patent Application Publication No. 100 38 354 A1 独国特許出願公開第４１ １０ １９５ Ａ１号明細書German Patent Application Publication No. 41 10 195 A1

本発明は、アクチュエータが消費する電気エネルギーが低く、信頼性の高い緊急動作モードを有する装置を提供することを目的とする。   It is an object of the present invention to provide a device having a highly reliable emergency operation mode with low electrical energy consumed by an actuator.

この目的は、請求項１の特徴部分で特定された特徴による本発明に従い達成される。   This object is achieved according to the invention by the features specified in the characterizing part of claim 1.

本発明の大きな利点は、通常動作中に、伝動要素を２つの回転要素の相対的角度位置を不変となるように固定でき、その際アクチュエータがエネルギーを必要としないことである。このことは、全体的な低エネルギー消費につながる、ゆえにアクチュエータに加わる熱がより低くなる。それでも、許容できない加熱がアクチュエータに生じる場合、２つの回転要素の相対的角度位置の制御不能な調整につながることなく内燃機関が動作しているときであっても冷却の目的で作動を停止できる。本発明の１つの特定の実施形態では、アクチュエータに給電されていない状態でアクチュエータの回転子が回転要素の少なくとも一方に能動的に接続され、伝動要素はアクチュエータが故障すると自動的に固定される。ゆえに問題もなく緊急動作モードを確保できる。   A great advantage of the present invention is that during normal operation, the transmission element can be fixed so that the relative angular position of the two rotating elements remains unchanged, in which case the actuator does not require energy. This leads to an overall low energy consumption and hence lower heat applied to the actuator. Nevertheless, if unacceptable heating occurs in the actuator, the operation can be stopped for cooling purposes even when the internal combustion engine is operating without leading to an uncontrollable adjustment of the relative angular position of the two rotating elements. In one particular embodiment of the present invention, the actuator rotor is actively connected to at least one of the rotating elements without power to the actuator, and the transmission element is automatically fixed when the actuator fails. Therefore, the emergency operation mode can be secured without any problem.

本発明の別の実施形態や利点は他の従属項や以下の説明から明らかとなる。   Other embodiments and advantages of the invention will become apparent from the other dependent claims and from the following description.

本発明は、本発明による装置を備えた内燃機関のカムシャフトドライブからの細部を示す概略部分断面図を参照して以下で説明される。   The invention will be described in the following with reference to a schematic partial sectional view showing details from a camshaft drive of an internal combustion engine equipped with a device according to the invention.

内燃機関のカムシャフトドライブの概略図（部分断面図で示された）において、カムシャフトとして具現化される回転要素は、１で示される。チェインホイールとして具現化される別の回転要素２は、内燃機関のクランクシャフト機構（図示せず）の回転要素１に割り当てられる。回転要素２は、伝動要素３を介して回転要素１を駆動するので回転要素１と回転要素２とは同回転速度となる。外周にチェインが装着される回転要素２は、回転要素１に対し同軸に配置され、回転要素１を囲み、伝動要素３は、回転要素１と回転要素２との間に配置されている。この伝動要素３（詳細に図示せず）は、例えば、遊星型ギヤ機構、斜板機構などとして具化されても良く、さらに電動アクチュエータ（電動モータ）５の回転子５ａによって作用される作動シャフト４を有する。調整に必要なドライブトルクは、アクチュエータ５の回転子５ａと固定子５ｂとの間で発生される。   In the schematic view of a camshaft drive of an internal combustion engine (shown in partial cross section), the rotating element embodied as a camshaft is indicated by 1. Another rotating element 2 embodied as a chain wheel is assigned to the rotating element 1 of the crankshaft mechanism (not shown) of the internal combustion engine. Since the rotating element 2 drives the rotating element 1 via the transmission element 3, the rotating element 1 and the rotating element 2 have the same rotational speed. The rotating element 2 on which the chain is mounted on the outer periphery is disposed coaxially with the rotating element 1, surrounds the rotating element 1, and the transmission element 3 is disposed between the rotating element 1 and the rotating element 2. The transmission element 3 (not shown in detail) may be embodied as, for example, a planetary gear mechanism, a swash plate mechanism, or the like, and further an operating shaft that is acted on by a rotor 5a of an electric actuator (electric motor) 5. 4. The drive torque necessary for adjustment is generated between the rotor 5a and the stator 5b of the actuator 5.

作動シャフト４の相対的回転によって、２つの回転要素１、２の相対的角度位置を変更させることが可能となる。作動シャフト４の相対的回転は、アクチュエータ５の回転子５ａによってもたらされる。   By the relative rotation of the operating shaft 4, it is possible to change the relative angular position of the two rotating elements 1,2. The relative rotation of the actuating shaft 4 is effected by the rotor 5a of the actuator 5.

低エネルギー消費量および確実な緊急動作機能をもたらすために、作動シャフト４は、本発明によれば、回転要素１または２の一方に働くように接続され、作動シャフト４と回転要素２との間の自発的な接続は代表的な実施形態で例示されている。作動シャフト４と回転要素２との間の自発的な接続は、作動シャフト４に軸方向に移動可能に接続されるアクチュエータ５の回転子５ａによって行われる。回転要素２に作動シャフト４を自発的に接続すると、伝動要素３が固定され、その結果、２つの回転要素１と２との間の相対的角度位置が不変となる。   In order to provide a low energy consumption and a reliable emergency operating function, the actuating shaft 4 is according to the invention connected to act on one of the rotating elements 1 or 2 and between the actuating shaft 4 and the rotating element 2. This spontaneous connection is illustrated in the exemplary embodiment. The spontaneous connection between the actuating shaft 4 and the rotating element 2 is made by a rotor 5a of an actuator 5 connected to the actuating shaft 4 so as to be movable in the axial direction. When the actuating shaft 4 is spontaneously connected to the rotating element 2, the transmission element 3 is fixed, so that the relative angular position between the two rotating elements 1 and 2 remains unchanged.

アクチュエータが通電されていないと、回転子５ａは、回転要素２に自発的に接続される。回転子５ａと回転要素２との間の自発的な接続は、回転子５ａに軸方向の力ＦＡ１を加えることによって行われ、この軸方向に加わる力は、円板バネ６によって発生される。他の動作原理もこの軸方向の力ＦＡ１を発生させるために使用できる。 When the actuator is not energized, the rotor 5a is spontaneously connected to the rotating element 2. The spontaneous connection between the rotor 5a and the rotating element 2 is performed by applying an axial force F A1 to the rotor 5a, and this axial force is generated by the disc spring 6. . Other operating principles can also be used to generate this axial force F A1 .

アクチュエータが通電されると、アクチュエータ５の電気的駆動力を低く保持するために回転子５ａと回転要素２との間の自発的な接続が解除される。アクチュエータ５が通電されると、軸方向力成分ＦＡ２が、アクチュエータ５の固定子５ｂと回転子５ａとの間で有利に作用状態となる。これは、例えば、固定子５ｂと回転子５ａとの間の軸方向オフセット７によって行われても良く、このオフセット７により、回転子５ａと固定子５ｂとの間の磁力の影響がこの軸方向の力成分ＦＡ２をもたらすからである。 When the actuator is energized, the spontaneous connection between the rotor 5a and the rotating element 2 is released in order to keep the electric driving force of the actuator 5 low. When the actuator 5 is energized, the axial force component F A2 is advantageously activated between the stator 5b and the rotor 5a of the actuator 5. This may be done, for example, by an axial offset 7 between the stator 5b and the rotor 5a, by which the influence of the magnetic force between the rotor 5a and the stator 5b is this axial direction. This is because the force component F A2 is obtained.

ハウジングに固定されるように回転子５ａを搭載する、ゆえに摩擦損を生成するのを避けるために、回転子５ａは回転要素１上に搭載され、それを他の回転要素、例えば作動シャフト４上に搭載することも考えられる。   In order to mount the rotor 5a so as to be fixed to the housing and thus avoid generating friction losses, the rotor 5a is mounted on the rotating element 1, which is connected to another rotating element, for example on the actuating shaft 4 It can also be installed in

作動シャフト４と回転要素１、２の一方との間の自発的な接続は、別に作動できる構成要素（ここでは図示せず）によっても達成される。その構成要素は、例えば、ブレーキのような摩擦ロック接続要素及び／又は例えば、クラッチのような非積極ロック接続要素及び／又は例えば磁気クラッチのような積極ロック接続要素として具化されても良い。   The spontaneous connection between the actuating shaft 4 and one of the rotary elements 1, 2 is also achieved by components (not shown here) that can be actuated separately. The component may be embodied as a friction locking connection element such as a brake and / or a non-positive locking connection element such as a clutch and / or a positive locking connection element such as a magnetic clutch.

上述の自発的な接続可能性のそれぞれは、摩擦的にロックするように有利に実施できる。   Each of the above described voluntary connection possibilities can be advantageously implemented to frictionally lock.

本発明による装置を備えた内燃機関のカムシャフトドライブからの細部を示す概略部分断面図である。1 is a schematic partial sectional view showing details from a camshaft drive of an internal combustion engine equipped with a device according to the invention.

符号の説明Explanation of symbols

１、２ 回転要素
３ 伝動要素
４ 作動シャフト
５ アクチュエータ
５ａ 回転子
５ｂ 固定子
６ 円板バネ
７ オフセット 1, 2 Rotating element 3 Transmission element 4 Actuating shaft 5 Actuator 5a Rotor 5b Stator 6 Disc spring 7 Offset

Claims (13)

駆動対象に接続され作動シャフト（４）を有する伝動要素（３）を介して接続される２つの回転要素（１、２）間の相対的角度調整を行う装置で、前記作動シャフト（４）は、電動アクチュエータ（５）の回転子（５ａ）によって作用を受け、前記電動アクチュエータ（５）の相対的位置を前記回転要素（１、２）に対して変更することによって前記回転要素（１、２）の相対的角度位置が変更される装置であって、
前記作動シャフト（４）は前記回転要素（１、２）の少なくとも一方に自発的に接続されることを特徴とする２つの回転要素間の相対的角度調整を行う装置。 A device for adjusting the relative angle between two rotating elements (1, 2) connected to a driven object and connected via a transmission element (3) having an operating shaft (4), the operating shaft (4) being The rotating element (1, 2) is acted upon by the rotor (5a) of the electric actuator (5) and changes the relative position of the electric actuator (5) relative to the rotating element (1, 2). ) In which the relative angular position is changed,
Device for adjusting the relative angle between two rotating elements, characterized in that the actuating shaft (4) is spontaneously connected to at least one of the rotating elements (1, 2). 前記２つの回転要素（１、２）の相対的角度位置は、前記回転要素（１、２）の一方への前記作動シャフト（４）の自発的な接続の結果として実質的に不変であることを特徴とする請求項１に記載の装置。   The relative angular position of the two rotating elements (1, 2) is substantially unchanged as a result of the spontaneous connection of the actuating shaft (4) to one of the rotating elements (1, 2). The apparatus of claim 1. 前記回転要素（１、２）の一方への前記作動シャフト（４）の自発的な前記接続は、前記電動アクチュエータ（５）の前記回転子（５ａ）によって行われることを特徴とする請求項１あるいは２に記載の装置。   The spontaneous connection of the actuating shaft (4) to one of the rotating elements (1, 2) is made by the rotor (5a) of the electric actuator (5). Or the apparatus of 2. 前記電動アクチュエータ（５）が通電されていないと、前記回転子（５ａ）は前記回転要素（１、２）の少なくとも一方に自発的に接続されることを特徴とする請求項３に記載の装置。   Device according to claim 3, characterized in that the rotor (5a) is spontaneously connected to at least one of the rotating elements (1, 2) when the electric actuator (5) is not energized. . 前記回転子（５ａ）と回転要素（１、２）との間の前記自発的な接続は、前記回転子（５ａ）に軸方向の力を加えること（ＦＡ１）によって行われることを特徴とする請求項３あるいは４に記載の装置。 The spontaneous connection between the rotor (5a) and the rotating elements (1, 2) is performed by applying an axial force (F A1 ) to the rotor (5a). An apparatus according to claim 3 or 4. 前記電動アクチュエータ（５）が通電されると、前記自発的な接続は解除されることを特徴とする請求項３に記載の装置。   4. Device according to claim 3, characterized in that the spontaneous connection is released when the electric actuator (5) is energized. 前記電動アクチュエータ（５）が通電されると、軸方向の力（ＦＡ２）が前記電動アクチュエータ（５）の固定子（５ｂ）と前記回転子（５ａ）との間で作用状態となることを特徴とする請求項３あるいは６に記載の装置。 When the electric actuator (5) is energized, an axial force (F A2 ) is activated between the stator (5b) of the electric actuator (5) and the rotor (5a). Device according to claim 3 or 6, characterized in that 前記固定子（５ｂ）と前記回転子（５ａ）との間の軸方向の力の影響（ＦＡ２）は、前記固定子（５ｂ）と前記回転子（５ａ）との間の軸方向オフセット（７）に起因することを特徴とする請求項７に記載の装置。 The influence (F A2 ) of the axial force between the stator (5b) and the rotor (5a) is the axial offset between the stator (5b) and the rotor (5a) ( Device according to claim 7, characterized in that it is due to 7). 前記電動アクチュエータ（５）の前記回転子（５ａ）は、前記回転要素（１、２）の一方に搭載されることを特徴とする請求項１〜８のいずれか一項に記載の装置。   The device according to claim 1, wherein the rotor (5 a) of the electric actuator (5) is mounted on one of the rotating elements (1, 2). 前記電動アクチュエータ（５）の前記回転子（５ａ）は、作動シャフト（４）に直接に固定されることを特徴とする請求項１〜９のいずれか一項に記載の装置。   10. A device according to any one of the preceding claims, characterized in that the rotor (5a) of the electric actuator (5) is fixed directly to the actuation shaft (4). 前記作動シャフト（４）と前記回転要素（１、２）との間の前記自発的な接続は、別に作動できる構成要素によって行われることを特徴とする請求項１に記載の装置。   Device according to claim 1, characterized in that the spontaneous connection between the actuating shaft (4) and the rotating element (1, 2) is made by a separately actuable component. 別に作動できる前記構成要素は、摩擦ロック及び／又は積極ロック及び／又は非積極ロック接続であることを特徴とする請求項１１に記載の装置。   12. Device according to claim 11, characterized in that the separately actuable component is a friction lock and / or a positive lock and / or a non-positive lock connection. 前記自発的な接続は、摩擦力でロックすることを特徴とする請求項１〜１２のいずれか一項に記載の装置。   The device according to claim 1, wherein the spontaneous connection is locked by a frictional force.
JP2004509242A 2002-06-01 2003-04-19 Device for adjusting the relative angle between two rotating elements Expired - Fee Related JP4370244B2 (en)

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