Centrifugal-pendulum-type vibration absorption device and method for designing same

Abstract

[Solution] A centrifugal-pendulum-type vibration absorption device (10) constitutes a motion-starting device (1) together with a damper mechanism (8) that includes: a plurality of rotating elements including a drive member (81) connected to an engine via a lock-up clutch (9) and a driven member (83) connected to a transmission; and a first and second coil spring (SP1, SP2) that transmit torque between the drive member (81) and the driven member (83). The centrifugal pendulum-type vibration absorption device includes a support member (11) that rotates as a single unit with the driven member (83) of the damper mechanism (8) and a mass body (12) that is supported by the support member (11) so as to be able to oscillate freely, and is designed so as to have an effective degree greater than the degree of vibration which is generated by the engine and which is to be damped, by a correction quantity related to the hysteresis of the damper mechanism (8).

Description

technical field [0001] The present invention relates to a centrifugal vibrator type vibration absorbing device and a design method thereof. The centrifugal vibrator type vibration absorbing device constitutes a starting device together with a shock absorber mechanism. The shock absorber mechanism includes an input member connected to a driving device and an output member connected to a transmission. A plurality of rotating members and a torque transmitting elastomer that transmits torque between the input member and the output member. Background technique [0002] Conventionally, as a force transmission device equipped with a centrifugal vibrator type vibration absorbing device, there is known a structure including: at least one input body, an output body; a hydraulic structural member; and a device spanning the hydraulic structural member in the form of a lock-up clutch; having at least two shock absorbers ( spring unit) vibration attenuation device; and a centrifugal vibr...

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Problems solved by technology

However, the method described in Patent Document 1 lacks a theoretical basis, and according to research by the present inventors, it has been clarified that viscous resistance in the presence of a liquid such as working oil has little influence on the oscillation of the mass body.

Therefore, even if the frequency of vibration of the mass body of the centrifugal vibrator type vibration absorbing device is set by the method described in Patent Document 1, the vibration absorbing performance of the centrifugal vibrator type vibration absorbing device cannot be improved, and there is a possibility that the vibration absorbing performance may be reduced depending on the situation.

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