The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 21, 1990
Filed:
Aug. 26, 1988
Mitsuhiro Umeyama, Toyota, JP;
Masaki Inui, Toyota, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
A flywheel device with a torsional damper having a first spring mechanism with a synthetic spring constant K1 and a second spring mechanism with a synthetic spring constant K2, arranged in series with each other as a spring combination. The second spring mechanism is controlled so as to be changed in operation between effective and ineffective states by a second spring mechanism operation controlling device. Thus, the vibrational characteristic of the flywheel device includes two characteristics, that is, spring constant K1 and spring constant K3 which is a synthesis of the spring constants K1 and K2. When the rotational speed of the flywheel device passes through the resonance speed of the vibrational characteristic with spring constant K1, the characteristic of the flywheel device is shifted to spring constant K3 and, as a result, there is no notable resonance speed throughout the entire range of rotational speeds. Due to this shift mechanism, it is not necessary to provide a continuously sliding friction mechanism against the flywheel device. Further, due to this omission of the continuously sliding friction mechanism, the torque variation absorbing effect at the standard range of rotational speeds is greatly improved.