Toyota Jidosha Kabushiki Kaisha

Nippon Soken, Inc.

Skydrive Inc.

Kenichi Yamamoto

Mitsuhiro Umeyama

Masaki Inui

Tokio Kohama

Hiroshi Itoh

Kenji Kanehara

Hisanaga Matsuoka

Koichi Shimizu

Kouzi Ohara

Yoriaki Ando

Yoshihiro Nakase

Yoshihiro Miyaji

Kanako Suzuki

Kaoru Wakahara

Tsuyoshi Sumi

Toshio Ando

Tetsuya Hyakutake

Hiroski Nimura

Toshihiro Ohtake

Provided is an abnormality detection device for a rotary wing unit. The rotary wing unit includes a plurality of rotary wings that is coaxially disposed. The abnormality detection device includes a controller configured to acquire at least one of a correlation at the time of normal operation between operation parameters related to the rotary wings and a correlation at the time of abnormal operation between the operation parameters and detect abnormality of the rotary wing unit, based on a correlation at the time of actual operation between the operation parameters and at least one of the correlation at the time of normal operation and the correlation at the time of abnormal operation.

Abnormality detection device and control device

The present disclosure aims to provide an evaluation apparatus and an evaluation method capable of evaluating a walking assistance apparatus by simulating an actual person's walking motion. An evaluation apparatusincludes a placement parton which a sole part of a walking assistance apparatusto be evaluated is placed; an actuatorconfigured to apply a load to the walking assistance apparatusin a direction of the placement partin a state in which the sole part faces the placement partand an actuatorconfigured to change a relative positional relation between the placement partand the sole part.

Evaluation apparatus and evaluation method

An exhaust manifold has inner and outer tubes made of stainless steel and welded to flanges provided at inlet ports of the exhaust manifold, from which exhaust gas discharged from an engine enters the exhaust manifold. The inner tube has flat portions, and shield plates disposed within the inner tube protect the flat portions from being directly vibrated by pressure waves of the exhaust gas. Accordingly, the vibration of the flat portions is lowered, so that high frequency noise from the exhaust manifold is reduced.

Stainless double tube exhaust manifold

An apparatus for preventing flow noise which suppresses the noise caused at the time of opening of a throttle valve provided in an intake passage of an internal combustion engine etc. At the downstream side of a pair of clearances formed at the top and bottom when the throttle valve opens, a means is provided acting on the flows of air passing through at least one of the clearances to reduce the flow rate and acting on the flows to cause the point of convergence of the flows of air passing through the pair of clearances to shift to the downstream side.

Apparatus for preventing flow noise in throttle valve

A flywheel device with a torsional damper including a driving side flywheel and a driven side flywheel, a first spring mechanism directly connecting the driving and driven side flywheels, and a second spring mechanism connecting the driving and driven side flywheels via a friction mechanism. The second spring mechanism and the friction mechanism are arranged in series with each other and the series combination of the second mechanism and the friction mechanism is arranged in parallel to the first spring mechanism. The first spring mechanism includes at least one combination of two springs arranged in series with each other. The two springs have a different spring constant or a different maximum angular stroke. Thus, a spring constant of the first spring mechanism changes at a predetermined torsional angle whereby a torque capacity of the flywheel is greatly increased.

Flywheel device with a torsional damper

A torsional damper type flywheel device wherein at least one of flywheel device components, for example, a spring connecting a drive side and a drive side of the flywheel device is asymmetric with respect to an axis of rotation of the flywheel device to form a total, original imbalance with respect to the axis of rotation. The flywheel device includes a compensating imbalance which is equal and opposite to the original imbalance as a vector and is equally divided into two portions each distributed to each of the drive side and the driven side. The compensating imbalance is formed in the drive side and the driven side before assembly of the flywheel device. When the drive side and driven side rotate relative to each other by a torsional angle .theta. and thus a gravity center of the asymmetrically arranged spring rotates by an angle .theta./2 about the axis of rotation, a vector defined by the two portions of the compensating imbalance also rotates by the angle .theta./2 about the axis of rotation. As a result, the flywheel device is maintained in balance at all torsional angles.

Torsional damper type flywheel device

A flywheel with a torsional damper having two kinds of spring mechanisms, one spring mechanism directly connecting driving and driven side flywheels and the other spring mechanism connecting the driviing and driven side flywheels via a friction mechanism. By this arrangement, the flywheel has two vibrational characteristics between which vibrational operation of the flywheel can shift depending on whether the friction mechanism slides. The flywheel can pass through its resonance speed by shifting its operation from one vibrational characteristic to the other without being accompanied by a large amplification of vibration. In addition, since sliding at the friction mechanism occurs only briefly, a good damping effect can be obtained at the usual range of engine operating speeds unlike a prior art flywheel with a continuously sliding hysteresis mechanism.

Flywheel with a torsional damper

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Okazaki, Japan

Kenichi Yamamoto