Damper device

Patent metadata

Field	Value
Publication number	US-10323716-B2
Application number	US-201515532012-A
Country	US
Kind code	B2
Filing date	Dec 25, 2015
Priority date	Dec 25, 2014
Publication date	Jun 18, 2019
Grant date	Jun 18, 2019

Abstract

A damper device includes first inner springs configured to transmit a torque between a drive member and an intermediate member, second inner springs configured to transmit a torque between the intermediate member and a driven member, and a rotary inertia mass damper including a sun gear serving as a mass body rotating with relative rotation of the drive member to the driven member. The rotary inertia mass damper is provided in parallel to a torque transmission path including the intermediate member, the first inner springs and the second inner springs. A damping ratio ζ of the intermediate member determined based on a moment of inertia J2 of the intermediate member and rigidities k1 and k2 of the first and the second inner springs and is less than a value.

First claim

The invention claimed is:

1. A damper device configured to include an input element to which a torque from an engine is transmitted and an output element, the damper device comprising:
a torque transmission path including an intermediate element, a first elastic body configured to transmit a torque between the input element and the intermediate element, and a second elastic body configured to transmit a torque between the intermediate element and the output element; and
a rotary inertia mass damper configured to include a mass body rotating with relative rotation of the input element to the output element and provided between the input element and the output element in parallel to the torque transmission path, wherein
a damping ratio of the intermediate element determined based on a moment of inertia of the intermediate element and rigidities of the first and the second elastic bodies is less than a value 1.

2. The damper device according to claim 1 ,
wherein the intermediate element is an annular member.

3. The damper device according to claim 1 ,
wherein a rotation speed corresponding to a natural frequency of the intermediate element is higher than a minimum rotation speed in a rotation speed range where a torque is transmitted from the input element to the output element via the torque transmission path, and wherein an amplitude of a vibration transmitted to the output element via the second elastic body changes from decreasing to increasing before a rotation speed of the input element that is equal to or higher than the minimum rotation speed reaches the rotation speed corresponding to the natural frequency of the intermediate element.

4. The damper device according to claim 1 ,
wherein the rotary inertia mass damper configured to include a differential including a first element arranged to rotate integrally with the input element, a second element arranged to rotate integrally with the output element and a third element arranged to rotate integrally with the mass body.

5. The damper device according to claim 4 ,
wherein the differential is a planetary gear.

6. The damper device according to claim 4 ,
wherein the torque transmission path includes a first intermediate element and a second intermediate element as the intermediate element and further includes a third elastic body, wherein the first elastic body is arranged to transmit a torque between the input element and the first intermediate element, the second elastic body is arranged to transmit a torque between the first intermediate element and the second intermediate element, and the third elastic body is arranged to transmit a torque between the second intermediate element and the output element, wherein the first intermediate element and the second intermediate element are annular members, and wherein the damping ratio of at least one of the first intermediate element and the second intermediate element is less than the value 1.

7. The damper device according to claim 1 ,
wherein the intermediate element is coupled with a turbine runner of a fluid transmission device to be integrally rotated.

8. The damper device according to claim 1 ,
wherein the mass body of the rotary inertia mass damper is configured to include a turbine runner of a fluid transmission device.

9. The damper device according to claim 1 ,
wherein the first elastic body has a spring constant that is identical with a spring constant of the second elastic body.

10. The damper device according to claim 1 ,
wherein the first elastic body has a spring constant that is different from a spring constant of the second elastic body.

11. The damper device according to claim 1 ,
wherein spring constant of the first and the second elastic bodies and moment of inertia of the intermediate element and the mass body are determined, based on a minimum frequency of frequencies of antiresonance points that provide zero vibration amplitude of the output element.

12. The damper device according to claim 11 ,
wherein the spring constant of the first and the second elastic bodies and the moment of inertia of the intermediate element and the mass body are determined, based on the minimum frequency of the antiresonance point and number of cylinders of the engine.

13. The damper device according to claim 12 ,
wherein the damper device is configured to satisfy 500 rpm ≤(120/n)·fa 1 ≤1500 rpm, where fa 1 denotes the minimum frequency of the antiresonance point and n denotes the number of cylinders of the engine.

14. The damper device according to claim 12 ,
wherein the damper device is configured to satisfy Nlup≤(120/n)·fa 1 , where Nlup denotes a lockup rotation speed of a lockup clutch arranged to couple the engine with the input element.

15. The damper device according to claim 13 ,
wherein the damper device is configured to satisfy 900 rpm≤(120/n)·fa 1 ≤1200 rpm.

16. The damper device according to claim 11 ,
wherein the differential is a planetary gear, and wherein the minimum frequency fa 1 of the antiresonance point is expressed by Equation (1):

[

Math
.

⁢
1

]

fa
1

=

1

2
⁢

⁢
π

⁢

(

k
1

+

k
2

)

-

(

k
1

+

k
2

)

2

-

Assignees

• Aisin Aw Ind Co Ltd
• Aisin Aw Co

Inventors

• Yoshikawa Takuya
• Ogawa Aki
• Kinoshita Tomonori
• Kanyama Yuji
• Yamaguchi Makoto
• Ito Kazuyoshi
• Nagai Hiroki
• Wajima Masaki
• Sakamoto Takao
• Itou Kazuhiro
• Takikawa Yoshihiro
• Oi Yoichi

Classifications

• F16H2045/0231

  arranged in series · CPC title

• F16H45/02

  with mechanical clutches for bridging a fluid gearing of the hydrokinetic type (control of torque converter lock-up clutches F16H61/14) · CPC title

• F16F15/12306

  Radially mounted springs · CPC title

• F16F2232/02

  Rotary · CPC title

• F16F15/12366

  acting on multiple sets of springs · CPC title