Damper device and design method of damper device

A designing method of a damper device, the method comprising:

• providing an input element coupled to an engine via a clutch;
• providing an output element coupled to an input shaft of a transmission;
• and
• providing a plurality of elastic bodies disposed between the input element and the output element, wherein
• when a total moment of inertia of the output element and a rotation element that rotates integrally with the output element on the engine side with respect to the input shaft is J2, and a total moment of inertia of all rotation members included between the input shaft and a differential gear coupled to an output shaft of the transmission is JTM, setting the moment of inertia J2 so that 0.12≤J2/(J2+JTM)≤0.55 is satisfied.

A transmission system including a damper device comprising:

• an input element coupled to an engine via a clutch;
• an intermediate element;
• an output element coupled to an input shaft of a transmission;
• a first elastic body that is disposed between the input element and the intermediate element;
• and
• a second elastic body that is disposed between the intermediate element and the output element and that acts in series with the first elastic body, wherein
• when a total moment of inertia of the output element and a rotation element that rotates integrally with the output element on the engine side with respect to the input shaft is J2, and a total moment of inertia of all rotation members included between the input shaft and a differential gear coupled to an output shaft of the transmission is JTM, 0.12≤J2/(J2+JTM)≤0.5 is satisfied.

A designing method of a damper device, the method comprising:

• providing an input element coupled to an engine via a clutch;
• providing an intermediate element;
• providing an output element coupled to an input shaft of a transmission;
• providing a first elastic body that is disposed between the input element and the intermediate element;
• providing a second elastic body that is disposed between the intermediate element and the output element and that acts in series with the first elastic body, wherein
• when a total moment of inertia of the output element and a rotation element that rotates integrally with the output element on the engine side with respect to the input shaft is J2, and a total moment of inertia of all rotation members included between the input shaft and a differential gear coupled to an output shaft of the transmission is JTM, setting the moment of inertia J2 so that 0.12≤J2/(J2+JTM)≤0.5 is satisfied.