JP2009243548A - Torque rod device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a torque rod device can reduce vibration level in a frequency band excluding a prescribed frequency band even if input torque varies. <P>SOLUTION: The torque rod device is provided with; a first attachment bush 10; a second attachment bush 20; a connection part 30 connecting both attachment bushes 10, 20; a mass 40 relatively movably attached on the first attachment bush 10, the second attachment bush 20 or the connection part; an actuator 50 moving a relative position of the mass 40 relative to the first attachment bush 10, the second attachment bush 20 or the connection part 30; and control part 2 actively controlling the actuator 50 to change a center of gravity of a torque rod body 1 including the first attachment bush 10, the second attachment bush 20, the connection part 30, the mass 40 and the actuator 50. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention is a torque rod that is bridged between an engine side and a body side of a vehicle, restricts displacement in the front-rear direction of the engine and rolls (rotation about the front-rear direction), and performs vibration isolation between the engine side and the body side. It relates to the device.

  Examples of the torque rod include those described in JP-A-6-109075 (Patent Document 1) and JP-A-2005-315315 (Patent Document 2). The torque rod is bounced or pitched by vibration of the engine in the vertical direction of the vehicle, and rolls are generated by rotation of the engine around the longitudinal direction of the vehicle. Japanese Patent Application Laid-Open No. 8-233030 (Patent Document 3) and International Publication No. 2002/042661 pamphlet (Patent Document 4) describe that the connecting portion constitutes a dynamic damper.

By the way, although it is not a torque rod of a vehicle, the resonance apparatus which changes a resonance frequency automatically according to input vibration is described in Unexamined-Japanese-Patent No. 2004-301267 (patent document 5). This resonance apparatus changes a resonance frequency as a dynamic damper by moving a mass in accordance with input vibration.
Japanese Patent Laid-Open No. 6-109075 JP 2005-315315 A Japanese Patent Laid-Open No. 8-233030 International Publication No. 2002/042661 Pamphlet JP 2004-301267 A

  Here, the resonance frequency band of bounce or pitching is adjusted to a frequency band having a relatively small vibration level in the vibration frequency of the entire vehicle body. As a result, even if the vibration due to the torque rod increases in the vicinity of the resonance frequency of the torque rod, the vibration level of the entire vehicle body does not increase because the vibration due to other components is set small. Therefore, even if the vibration level in the predetermined frequency band is high to some extent, it is desired to reduce the vibration level in a frequency band other than the predetermined frequency band.

  However, the resonance frequency of bounce or pitching of the torque rod changes according to the input torque to the torque rod. The input torque to the torque rod varies depending on the engine speed and the running state of the vehicle. Therefore, when the torque rods described in Patent Documents 1 to 4 are applied, the resonance frequency of the bounce and pitching of the torque rod changes greatly. In other words, even if the vibration due to the torque rod does not affect the vibration of the entire vehicle body at a certain engine speed, the input torque to the torque rod changes at another engine speed, resulting in There is a risk that the vibration level will affect the vibration of the.

  The device described in Patent Document 5 contributes to the reduction of the vibration level by changing the resonance frequency as a dynamic damper. However, this apparatus changes the resonance frequency after the input vibration is actually input and the apparatus itself vibrates. Therefore, the responsiveness is low. Furthermore, in the said apparatus, when the input torque to a torque rod changes, it cannot solve about reducing the vibration level in frequency bands other than a predetermined frequency band.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a torque rod device that can reduce a vibration level in a frequency band other than a predetermined frequency band even when the input torque changes. And

  Hereinafter, each means suitable for solving the above-described problems will be described with additional effects and the like as necessary.

(Means 1) A torque rod device according to means 1 comprises:
A first mounting bush attached to the first member;
A second mounting bush attached to a second member spaced apart from the first member;
A connecting portion for connecting the first mounting bush and the second mounting bush;
A mass attached to the first attachment bush, the second attachment bush or the connecting portion so as to be relatively movable;
An actuator for moving a relative position of the mass with respect to the first mounting bush, the second mounting bush or the connecting portion;
A controller that actively controls the actuator to change the center of gravity of the torque rod body including the first mounting bush, the second mounting bush, the connecting portion, the mass, and the actuator;
Is provided.

  According to the means 1, the center of gravity of the torque rod body is changed by actively changing the position of the mass by the control unit. By changing the center of gravity of the torque rod body, the resonance frequency of the torque rod body changes. Therefore, even when the input torque changes, the vibration level in a frequency band other than the predetermined frequency band can be reduced. Particularly, since the resonance frequency of the torque rod body is actively changed, the responsiveness is high. Further, when torque is input to the torque rod main body, even if bounce, pitching and roll are generated in the torque rod main body, the position of the mass can be changed regardless of the bounce, pitching and roll. . That is, this means is different from the change of the mass position due to bounce or pitching as in Patent Document 5. Thereby, the mass can be moved so as to reduce the vibration level in the frequency band other than the predetermined frequency band.

(Means 2) In the torque rod device according to claim 1,
When a change width in which a resonance frequency of pitching or bounce of the torque rod body changes with respect to a predetermined torque range that can be input to the torque rod body is defined as a resonance frequency change width,
The control unit actively controls the actuator so that the resonance frequency change width is narrower than that in a case where the relative position of the mass is not moved.
According to the means 2, in the range of the input torque, the change width in which the resonance frequency of pitching or bounce changes can be made narrower than when the center of gravity is not changed. Thereby, the influence on the vibration of the entire vehicle body can be reduced.

(Means 3) In the torque rod device of means 2, the control unit controls the actuator so that the resonance frequency of the pitching or bounce becomes constant when the input torque changes within the predetermined torque range.
According to the means 3, since the resonance frequency of pitching or bounce is constant by the torque rod body even if the input torque changes, the influence on the vibration of the entire vehicle body can be reduced more reliably.

(Means 4) In the torque rod device of means 2 or 3, the mass is attached so that the roll central axis of the torque rod body does not change when the mass moves relatively.
According to the means 4, it is possible to influence only the resonance frequency of bounce or pitching without affecting the resonance frequency of the roll. Therefore, it is possible to freely control only the resonance frequency of bounce or pitching.

(Means 5) In the torque rod device according to any one of means 2 to 4, the mass is attached to a lower one of the first attachment bush and the second attachment bush.
According to the means 5, the mass is attached to the attachment bush having the lower spring constant. Thereby, it is possible to influence the resonance frequency of bounce or pitching with a small amount of movement of the mass.

(Means 6) In the torque rod device according to any one of claims 2 to 5, the mass and the actuator are incorporated in the connecting portion.
According to the means 6, the above effect can be achieved while suppressing an increase in the size of the torque rod body.

(Means 7) In the torque rod device according to claim 1, the control unit actively controls the actuator so that the resonance frequency of the roll of the torque rod body is close to the resonance frequency of pitching or bounce.
According to the means 7, the frequency characteristic of the bounce or pitching and the frequency characteristic of the roll can be coupled. That is, the frequency characteristic of the roll can exhibit a function like a so-called dynamic damper with respect to the frequency characteristic of bounce or pitching. As a result, the vibration level in bounce or pitching of the torque rod body can be reduced.

(Means 8) In the torque rod device of means 7, the mass is moved relative to a roll center axis of the torque rod body in a state in which the mass is positioned at a predetermined position.
According to the means 8, the resonance frequency of the roll can be changed reliably. That is, the vibration level can be reliably reduced.

(Means 9) In the torque rod device of means 7 or 8, the mass is attached to the connecting portion.
According to the means 9, the mass movement can greatly influence the resonance frequency of the roll without greatly affecting the bounce or pitching. As a result, the vibration level can be reliably reduced without greatly changing the resonance frequency of bounce or pitching.

(Means 10) In the torque rod device according to any one of the means 7 to 9, the actuator is actively controlled so as to make the resonance frequency of the roll constant.
According to the means 10, the resonance of the roll is coupled to the bounce or pitching, so that the valley of the resonance characteristic can be made constant. Thereby, the vibration level in a predetermined frequency band can also be reduced.

(Means 11) In the torque rod device according to any one of the means 7 to 9, the control unit actively controls the actuator so that the resonance frequency of the roll matches the resonance frequency of the pitching or bounce.
According to the means 11, the peak of the two peak portions formed on both sides of the valley portion can be reduced by coupling the resonance of the roll to the bounce or pitching. That is, even if the input torque changes, the maximum value of the vibration level can be reduced.

(Means 12) In the torque rod device according to any one of the means 1 to 11, the control unit controls the actuator based on traveling information of the vehicle.
The torque input to the torque rod body changes according to the running state of the vehicle. That is, according to this means, since the actuator is controlled based on the traveling information of the vehicle, it is possible to reliably cope with a change in the input torque to the torque rod body.

(Means 13) In the torque rod device according to any one of means 1 to 11,
The torque rod device further includes a sensor that detects vibration of the torque rod body,
The control unit controls the actuator based on vibration detected by the sensor.
According to the means 13, since the actuator is controlled based on the vibration of the torque rod body, the actuator can be appropriately controlled only by the vibration input only to the torque rod body.

  DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment in which a torque rod device of the present invention is embodied will be described with reference to the drawings.

<First embodiment>
The torque rod device of the first embodiment will be described with reference to FIGS. FIGS. 1A and 1B are views showing a vehicle mounting state of the torque rod main body 1, wherein FIG. 1A is a right side view of the vehicle, and FIG. FIG. 2 is a view showing a torque rod device. FIG. 3 is a cross-sectional view of the torque rod body 1.

  As shown in FIG. 2, the torque rod device includes a torque rod body 1 and a control unit 2. Two torque rod bodies 1 and 1 are attached to the vehicle. Specifically, as shown in FIG. 1, one torque rod body 1 is attached so as to connect the right side of the upper surface of the engine 3 of the vehicle and the vehicle body 4. The other torque rod 1 is attached so as to connect the left side of the lower surface of the engine 3 of the vehicle and the vehicle body 4. The vehicle engine 3 is supported by the engine mount 6 with respect to the side frame 5. Accordingly, when the engine 3 vibrates in the vertical direction of the vehicle, vibration in the vertical direction of the vehicle and rotation around the longitudinal direction of the vehicle are input to the side where the torque rod body 1 is attached to the engine 3.

  As shown in FIGS. 2 and 3, the torque rod body 1 includes a first mounting bush 10, a second mounting bush 20 that is spaced from the first mounting bush 10, and both bushes 10. , 20, a mass 40, an actuator 50, and a cover 60.

  The first mounting bush 10 includes an inner cylinder 11, an outer cylinder 12, and a rubber elastic body 13. The inner cylinder 11 is made of metal or resin, and is attached to a member on the engine 3 side of the vehicle as a first member. The outer cylinder 12 is provided coaxially apart from the outer side of the inner cylinder 11. The rubber elastic body 13 is provided between the inner cylinder 11 and the outer cylinder 12 and elastically connects the two. This rubber elastic body 13 is integrally vulcanized with the inner cylinder 11 and the outer cylinder 12. The rubber elastic body 13 is formed with two corners 13a and 13b. These slips 13a and 13b are formed on both sides of the inner cylinder 11 in the separating direction (left and right direction in FIG. 1) of the first mounting bush 10 and the second mounting bush 20, respectively.

  The second mounting bush 20 includes an inner cylinder 21, an outer cylinder 22, and a rubber elastic body 23. The inner cylinder 21 is made of metal or resin, and is attached to a member on the vehicle body 4 side as a second member. The inner cylinder 21 is formed to have a smaller diameter than the inner cylinder 11 of the first mounting bush 10 both in the inner diameter and the outer diameter. The outer cylinder 22 is coaxially provided apart from the outer side of the inner cylinder 21. The outer cylinder 22 is formed to have a smaller diameter than the outer cylinder 12 of the first mounting bush 10 both in the inner diameter and the outer diameter. The rubber elastic body 23 is provided between the inner cylinder 21 and the outer cylinder 22 and elastically connects the two. This rubber elastic body 23 is integrally vulcanized with the inner cylinder 21 and the outer cylinder 22. The rubber elastic body 23 of the second mounting bush 20 has a higher spring constant than the rubber elastic body 13 of the first mounting bush 10.

  The connecting portion 30 connects the first mounting bush 10 and the second mounting bush 20 so that the axial direction of the first mounting bush 10 and the axial direction of the second mounting bush 20 are orthogonal to each other. is doing. The connecting portion 30 is formed integrally with the outer cylinder 12 of the first mounting bush 10 and the outer cylinder 22 of the second mounting bush 20.

  The mass 40 is attached to the outer cylinder 12 of the first mounting bush 10 having a low spring constant at a position farthest from the connecting portion 30. The mass 40 is in a linear direction connecting the center of the outer cylinder 12 of the first mounting bush 10 and the center of the outer cylinder 22 of the second mounting bush 20 with respect to the outer cylinder 12 of the first mounting bush 10. It can be moved. That is, the mass 40 is attached to the outer cylinder 12 so that the roll center axis of the torque rod body 1 does not change when moving relative to the outer cylinder 12. Here, the roll central axis is a central axis when the torque rod body 1 rolls. The roll center axis coincides with the vehicle longitudinal direction.

  The actuator 50 is attached to the mass 40 and the outer cylinder 12 of the first mounting bush 10, and includes a stepping motor that moves the relative position of the mass 40 with respect to the outer cylinder 12. That is, by driving the stepping motor, the mass 40 moves in the left-right direction in FIG. 2 with respect to the outer cylinder 12. And when the relative position of the mass 40 with respect to the outer cylinder 12 changes, the center of gravity of the torque rod body 1 changes. For example, the center of gravity of the torque rod body 1 when the mass 40 is located farthest from the outer cylinder 12 is greater than the center of gravity of the torque rod body 1 when the mass 40 is located closest to the outer cylinder 12 as shown in FIG. Located on the left side.

  The cover 60 is made of rubber or resin and covers the mass 40 and the actuator 50. That is, the mass 40 and the actuator 50 are not exposed.

  The control unit 2 actively controls the actuator 50 to control the position of the mass 40 with respect to the outer cylinder 12. That is, the control unit 2 changes the center of gravity of the torque rod body 1. The control unit 2 inputs vehicle travel information related to the travel state of the vehicle from an engine ECU 7 that controls the engine 3 and controls the actuator 50 based on the vehicle travel information. The vehicle travel information includes, for example, engine speed, vehicle speed, shift position, throttle opening, and the like. Specifically, the control unit 2 actively controls the actuator 50 so that the resonance frequency change width is narrower than when the relative position of the mass 40 with respect to the outer cylinder 12 is not moved. The resonance frequency change width is a change width in which the pitching or bounce resonance frequency of the torque rod body 1 changes with respect to a predetermined torque range that can be input to the torque rod body 1. More specifically, the control unit 2 controls the actuator 50 so that the resonance frequency of pitching or bounce becomes constant when the input torque changes within a predetermined torque range.

  Here, with reference to FIG. 4 and FIG. 5, the frequency characteristic of the torque rod body 1 when the relative position of the mass 40 with respect to the outer cylinder 12 changes will be described. FIG. 4 is a diagram illustrating a relative position of the mass 40 with respect to the outer cylinder 12. That is, FIG. 4A shows a state in which the mass 40 is located closest to the outer cylinder 12, and FIG. 4B shows a state in which the mass 40 is farther from the outer cylinder 12 than in the state of FIG. FIG. 4C shows a state where the mass 40 is farthest from the outer cylinder 12. FIG. 5 shows the frequency characteristics of bounce or pitching in the respective states of FIGS. 4 (a) to 4 (c). In FIG. 5, (a), (b), and (c) correspond to (a), (b), and (c) in FIG. Here, the bounce is the vibration of the entire torque rod body 1 in the vehicle vertical direction, and the pitching is the rotation of the torque rod body 1 about the vehicle left-right direction. In the torque rod main body 1 of the present embodiment, the second mounting bush 20 of the torque rod main body 1 is set to have a higher spring constant than the first mounting bush 10, so that the vicinity of the second mounting bush 20 is the center. Pitching occurs.

  As shown in FIG. 5, when the mass 40 is close to the outer cylinder 12, the resonance frequency of the torque rod body 1 increases, and as the mass 40 moves away from the outer cylinder 12, the resonance frequency of the torque rod body 1 decreases. That is, it was confirmed that the resonance frequency of the torque rod body 1 changes according to the position of the mass 40.

  As described above, the center of gravity of the torque rod body 1 is changed by actively changing the position of the mass 40 by the control unit 2. By changing the center of gravity of the torque rod body 1, the resonance frequency of the torque rod body 1 changes. Therefore, even when the input torque changes, the vibration level in a frequency band other than the predetermined frequency band can be reduced. More specifically, even if the input torque changes, the torque rod body 1 controls the resonance frequency of the pitching or bounce to be constant, so even if the input torque changes, the vicinity of the constant resonance frequency. Only the vibration level is always high, and the vibration level in other frequency bands is low. Therefore, the influence on the vibration of the entire vehicle body can be reduced more reliably.

  Further, since the resonance frequency of the torque rod body 1 is actively changed, the responsiveness is high. Further, when torque is input to the torque rod body 1, the position of the mass 40 is changed regardless of bounce, pitching, and roll even if bounce, pitching, and roll occur in the torque rod body 1. be able to. Thereby, the mass 40 can be moved so as to reduce the vibration level in a frequency band other than the predetermined frequency band.

  Further, since the mass 40 is mounted so that the roll central axis of the torque rod body 1 does not change, the mass 40 does not affect the resonance frequency of the roll, but only affects the resonance frequency of bounce or pitching. Can do. Therefore, it is possible to freely control only the resonance frequency of bounce or pitching. Further, since the mass 40 is attached to the first mounting bush 10 having a low spring constant, a slight movement amount of the mass 40 can greatly influence the resonance frequency of bounce or pitching. The control unit 2 performs control based on vehicle travel information input from the engine ECU 7. Therefore, the change of the input torque of the torque rod body 1 can be grasped reliably and promptly.

<First Modification of First Embodiment>
A first modification of the first embodiment will be described with reference to FIG. FIG. 6 is a partial cross-sectional view showing the torque rod body 100. In the first embodiment described above, the mass 40 and the actuator 50 are attached to the outer cylinder 12 at a position away from the connecting portion 30. On the other hand, in the said 1st deformation | transformation aspect, the mass 40 and the actuator 50 are built in the connection part 130. FIG.

  The connection part 130 is comprised by the two plate-shaped members arrange | positioned facing each other. And in order to implement | achieve the structure which incorporates the mass 40 and the actuator 50 in the connection part 130, the 1st attachment bush 110 and the 2nd attachment bush 120 are comprised as follows. The first mounting bush 110 is vulcanized and bonded to the first outer cylinder 111 formed integrally with the connecting portion 130 and the rubber elastic body 13, and is fixed to the inside of the first outer cylinder 111 by press-fitting. An outer cylinder 112 is provided. That is, separately from the first outer cylinder 111, the inner cylinder 11, the second outer cylinder 112 and the rubber elastic body 13 are molded as an integral vulcanized molded product, and then this integral vulcanized molded product is molded into the first outer cylinder. 111 is press-fitted. The second mounting bush 120 is vulcanized and bonded to the first outer cylinder 121 formed integrally with the connecting portion 130 and the rubber elastic body 23, and is fixed inside the first outer cylinder 121 by press-fitting. The second outer cylinder 122 is provided. The second mounting bush 120 is also mounted in the same manner as the first mounting bush 110.

  The mass 40 is attached to a connection portion with the connection portion 130 in the first outer cylinder 111 of the first attachment bush 110 having a low spring constant. The mass 40 has a center of the first outer cylinder 111 of the first mounting bush 110 and a center of the first outer cylinder 121 of the second mounting bush 120 with respect to the first outer cylinder 111 of the first mounting bush 110. It is possible to move in a straight line direction connecting That is, the mass 40 is attached to the first outer cylinder 111 so that the roll center axis of the torque rod body 100 does not change when moving relative to the first outer cylinder 111. As described above, the mass 40 and the actuator 50 are built in the connecting portion 130, specifically, disposed in the facing space between the two plate-like members constituting the connecting portion 130.

  Further, the cover 160 is made of rubber or resin and is formed in a cylindrical shape. The cover 160 is provided so as to cover the outer surfaces of the two plate-like members constituting the connecting portion 130. That is, the mass 40 and the actuator 50 are arranged inside the cover 160 in addition to the connecting portion 130.

  As described above, in the first modification of the first embodiment, the mass 40 and the actuator 50 are configured to be built in the connecting portion 130, thereby suppressing an increase in the size of the torque rod main body 100 and the first embodiment. The effect explained in the above can be achieved.

<Second Modification of First Embodiment>
A second modification of the first embodiment will be described with reference to FIG. FIG. 7 is a view showing the torque rod main body 200 of the modified mode. The torque rod main body 200 further includes a vibration sensor 210 with respect to the torque rod main body 1 of the first embodiment. The vibration sensor 210 is a sensor that detects vibration of the outer cylinder 12 of the first mounting bush 10 in the torque rod body 1. The control unit 2 controls the actuator 50 based on the result information after performing frequency analysis such as FFT based on the vibration detected by the vibration sensor 210. That is, the resonance frequency of the torque rod body 200 is changed based on the actual vibration frequency of the torque rod body 200.

  Thus, since the actuator 50 is controlled based on the vibration of the torque rod body 200, the actuator 50 can be appropriately controlled only by the vibration input only to the torque rod body 200.

<Second embodiment>
A torque rod device according to a second embodiment will be described with reference to FIG. FIG. 8 is a view showing a torque rod body 300 of the second embodiment. In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted. The torque rod main body 300 of the second embodiment differs from the torque rod main body 1 of the first embodiment in the arrangement of the mass 340, the actuator 350, and the cover 360.

  The mass 340 is attached to the second attachment bush 20 side of the connecting portion 30 having a high spring constant. The mass 340 is movable with respect to the connecting portion 30 in a direction orthogonal to a linear direction connecting the center of the outer cylinder 12 of the first mounting bush 10 and the center of the outer cylinder 22 of the second mounting bush 20. Has been. Specifically, the mass 340 is provided so as to be movable with respect to the connecting portion 30 in the left-right direction of the vehicle. That is, the mass 340 is moved relative to the roll center axis of the torque rod body 300 in a state in which the mass 340 is positioned at a predetermined position. In other words, the mass 340 is attached to the connecting portion 30 so as to change the roll center axis of the torque rod body 1 when moving relative to the connecting portion 30.

  The actuator 350 is attached to the mass 340 and the connecting portion 30 and includes a stepping motor that moves the relative position of the mass 340 with respect to the connecting portion 30. That is, by driving the stepping motor, the mass 340 moves in the left-right direction of the vehicle (up-down direction in FIG. 8) with respect to the connecting portion 30. The actuator 350 is built in the connecting portion 30. And the gravity center of the torque rod main body 300 changes because the relative position with respect to the connection part 30 of the mass 340 changes. For example, the center of gravity of the torque rod main body 300 when the mass 340 is at the position farthest from the connecting portion 30 is greater than the center of gravity of the torque rod main body 300 when the mass 340 is closest to the connecting portion 30 as shown in FIG. Located on the upper side.

  The cover 360 is made of rubber or resin and covers the mass 340 and the actuator 350. That is, the mass 340 and the actuator 350 are not exposed.

  Here, the frequency characteristics of the torque rod main body 300 when the relative position of the mass 340 with respect to the connecting portion 30 changes will be described with reference to FIGS. 9 and 10. FIG. 9 is a diagram illustrating a relative position of the mass 340 with respect to the connecting portion 30. That is, FIG. 9A shows a state where the mass 340 is located closest to the connecting portion 30, and FIG. 9B shows a state where the mass 340 is farther from the connecting portion 30 than the state shown in FIG. 9A. 9C shows a state in which the mass 340 is farther from the connecting portion 30 than in the state of FIG. 9B, and FIG. 9D shows that the mass 340 is farthest from the connecting portion 30. It is the state of the position. FIG. 10 shows the frequency characteristics of bounce or pitching in the respective states of FIG. 9 (a) to FIG. 9 (d). In FIG. 10, (a), (b), (c), and (d) correspond to (a), (b), (c), and (d) in FIG.

  As shown in FIG. 10A, when the mass 340 is closest to the coupling portion 30, the resonance frequency f1 of the roll of the torque rod main body 300 is the highest and is far away from the resonance frequency f4 of the pitching. As shown in FIG. 10B, when the mass 340 is moved in a direction slightly away from the connecting portion 30, the roll resonance frequency becomes f2 and approaches the pitching resonance frequency f4. At this time, the vibration level at the resonance frequency f4 of pitching is almost the same as in the case of (a). As shown in FIG. 10C, when the mass 340 is moved further away from the connecting portion 30, the resonance frequency of the roll becomes f3, which further approaches the resonance frequency f4 of pitching. Also at this time, the vibration level at the resonance frequency f4 of pitching is almost the same as in the case of (a). Furthermore, as shown in FIG. 10D, when the mass 340 is moved to the position farthest from the connecting portion 30, the roll resonance frequency becomes f4, which coincides with the pitching resonance frequency f4. At this time, the pitching vibration and the roll vibration are coupled to form a trough at the frequency f4. And in both adjacent parts of the frequency f4, two peak parts with substantially the same vibration level are formed. That is, the vibration level in the frequency f4 and the frequency band in the vicinity thereof is reduced. As described above, it was confirmed that the resonance frequency of the roll was changed by changing the position of the mass 340.

  In this embodiment, the control unit 2 actively controls the actuator 350 so that the resonance frequency of the roll of the torque rod body 300 is close to the resonance frequency of pitching or bounce. In particular, the control unit 2 actively controls the actuator so that the resonance frequency of the roll always becomes a constant f4 even if the resonance frequency of pitching or bounce changes as the input torque changes.

  As described above, the resonance of the roll is surely coupled to bounce or pitching, so that the valley of the resonance characteristic (frequency characteristic) can be made constant. Thereby, the vibration level in a predetermined frequency band can also be reduced. In particular, the movement of the mass 340 can greatly affect the resonance frequency of the roll without significantly affecting bounce or pitching. As a result, the vibration level can be reliably reduced without greatly changing the resonance frequency of bounce or pitching.

<Modification of Second Embodiment>
In the second embodiment, the control unit 2 controls the actuator 350 so that the resonance frequency of the roll is constant, so that the valley of the resonance characteristic (frequency characteristic) is constant. In addition, the control unit 2 can also actively control the actuator so that the resonance frequency of the roll matches the resonance frequency of the pitching or bounce. Thereby, the resonance of the roll is coupled to bounce or pitching, whereby the peaks of the two peaks formed on both sides of the valley can be reduced. That is, even if the input torque changes, the maximum value of the vibration level can be reduced.

<Others>
In the above-described embodiment, the first mounting bushes 10 and 110 are connected to each other so that the axial direction of the first mounting bushes 10 and 110 and the axial direction of the second mounting bushes 20 and 120 are orthogonal to each other. In addition, you may connect both so that the axial direction of the 1st attachment bushes 10 and 110 and the axial direction of the 2nd attachment bushes 20 and 120 may become parallel. Also in this case, the same effects as those of the above embodiment can be obtained. In the above-described embodiment, the first mounting bushes 10 and 110 having a large outer diameter are attached to members on the engine 3 side of the vehicle, and the second mounting bushes 20 and 120 having a small outer diameter are mounted on the body 4 side of the vehicle. Attached to the member. In addition, the first attachment bushes 10 and 110 may be attached to members on the vehicle body 4 side, and the second attachment bushes 20 and 120 may be attached to members on the engine 3 side of the vehicle.

It is a figure which shows the vehicle attachment state of the torque rod main body 1, (a) is a vehicle right view, (b) is a vehicle top view. It is a figure which shows the torque rod apparatus of 1st embodiment. It is sectional drawing of the torque rod main body 1 of 1st embodiment. It is a figure which shows the relative position with respect to the outer cylinder 12 of the mass 40. FIG. The frequency characteristics of bounce or pitching in the respective states of FIGS. 4A to 4C are shown. 1 is a view showing a torque rod body 100. FIG. It is a figure which shows the torque rod main body 200 of the deformation | transformation aspect of 1st embodiment. It is a figure which shows the torque rod main body 300 of 2nd embodiment. It is a figure which shows the relative position with respect to the connection part 30 of the mass 340. FIG. The frequency characteristics of bounce or pitching in the respective states of FIGS. 9A to 9D are shown.

Explanation of symbols

1, 100, 200, 300: Torque rod body, 2: Control unit, 3: Engine 4: Body, 5: Side frame, 6: Engine mount 10, 110: First mounting bush 11: Inner cylinder, 12, 111 112: outer cylinder, 13: rubber elastic body 20, 120: second mounting bush 21: inner cylinder, 22, 121, 122: outer cylinder, 23: rubber elastic body 30, 130: connecting portion 40, 340: mass 50, 350: Actuators 60, 160, 360: Cover

Claims (13)

A first mounting bush attached to the first member;
A second mounting bush attached to a second member spaced apart from the first member;
A connecting portion for connecting the first mounting bush and the second mounting bush;
A mass attached to the first attachment bush, the second attachment bush or the connecting portion so as to be relatively movable;
An actuator for moving a relative position of the mass with respect to the first mounting bush, the second mounting bush or the connecting portion;
A controller that actively controls the actuator to change the center of gravity of the torque rod body including the first mounting bush, the second mounting bush, the connecting portion, the mass, and the actuator;
A torque rod device comprising: When a change width in which a resonance frequency of pitching or bounce of the torque rod body changes with respect to a predetermined torque range that can be input to the torque rod body is defined as a resonance frequency change width,
2. The torque rod device according to claim 1, wherein the control unit actively controls the actuator so that the resonance frequency change width is narrower than that in a case where the relative position of the mass is not moved.   The torque rod device according to claim 2, wherein the control unit controls the actuator so that a resonance frequency of the pitching or bounce is constant when an input torque is changed within the predetermined torque range.   The torque rod device according to claim 2 or 3, wherein the mass is attached so that a roll central axis of the torque rod body does not change when the mass moves relatively.   The torque rod device according to any one of claims 2 to 4, wherein the mass is attached to a lower spring constant of the first attachment bush and the second attachment bush.   The torque rod device according to any one of claims 2 to 5, wherein the mass and the actuator are built in the connecting portion.   The torque rod device according to claim 1, wherein the control unit actively controls the actuator so that a resonance frequency of the roll of the torque rod body approaches a resonance frequency of pitching or bounce.   The torque rod device according to claim 7, wherein the mass is moved relative to a roll center axis of the torque rod body in a state in which the mass is positioned at a predetermined position.   The torque rod device according to claim 7 or 8, wherein the mass is attached to the connecting portion.   The torque rod device according to any one of claims 7 to 9, wherein the control unit actively controls the actuator so as to make a resonance frequency of the roll constant.   The torque rod device according to any one of claims 7 to 9, wherein the control unit actively controls the actuator so that a resonance frequency of the roll coincides with a resonance frequency of the pitching or bounce.   The torque rod device according to any one of claims 1 to 11, wherein the control unit controls the actuator based on travel information of a vehicle. The torque rod device further includes a sensor that detects vibration of the torque rod body,
The torque rod device according to any one of claims 1 to 11, wherein the control unit controls the actuator based on vibration detected by the sensor.

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