Nissan Motor Company Limited

Oiles Corporation

Oiles Industry Co., Ltd.

Yamakawa Industrial Co.

Takanobu Ide

Masamitsu Kojima

Masami Mochimaru

Ikuo Shimoda

Masaru Iwakura

Masamitsu Takano

Shinjiro Yukawa

Yoichi Ozaki

Masami Tsuji

Masura Iwakura

A vibration damper for damping roll vibration of a power unit mounted on a vehicle body. The vibration damper is composed of a disc plate fixedly connected to the power unit in a manner that the axis of the disc plate is generally parallel with a roll axis of the power unit. The disc plate is sealingly disposed in a chamber formed in a generally circular casing which is coaxial with the disc plate. A viscous fluid is filled in a space defined between the disc plate and inner surface of the casing. The casing is formed of a plastic which has a higher linear expansion coefficient than a metal forming the disc plate, thereby allowing the space filled with the viscous fluid to expand along with thermal expansion of the viscous fluid.

Vibration damper for power unit

A restrictive fluid passageway is defined between an outer sleeve and a bracket to provide fluid communication between a working chamber and a compensation chamber or two compensation chambers. In one embodiment, two compensating chambers are arranged outside of the outer sleeve. In another embodiment, one compensation chamber is arranged within the outer sleeve, and the outer sleeve is constituted by axially separated three sections, i.e., first and second sleeve sections and a spacer section interposed between the first and second sleeve sections. A resilient deformable member and flexible wall member has a pair of axially spaced sealing lips projecting outward from an outer circumferential surface. The sealing lips are interposed between matched ends of the first and second sleeve sections and the spacer section and sealingly contact an inner circumferential surface of the bracket.

Fluid filled elastomeric damping device

A damper used to damp roll vibration of an automotive power unit includes housing in which a disc is immersed in a highly viscous liquid, and a linkage which has universal joints formed at each end thereof. The linkage induces relative rotation between the housing and the disc. A resilient vibration attenuating arrangement is included in one or both of the universal joints for insulating the vehicle chassis from vibration which tends to be freely transmitted through the damper per se and cause cabin reverberation noise.

Damper unit for automotive power unit or the like

A restrictive fluid passageway is defined between an outer sleeve and a bracket to provide fluid communication between a working chamber and a compensation chamber or two compensation chambers. In one embodiment, two compensating chambers are arranged outside of the outer sleeve. In another emboidment, one compensation chamber is arranged within the outer sleeve, and the outer sleeve is constituted by axially separated three sections, i.e., first and second sleeve sections and a spacer section interposed between the first and second sleeve sections. A resilient deformable member and flexible wall member has a pair of axially spaced sealing lips projecting outward from an outer circumferential surface. The sealing lips are interposed between matched ends of the first and second sleeve sections and the spacer section and sealingly contact an inner circumferential surface of the bracket.

A damper comprises housing in which a disc is immersed in a highly viscous liquid, and a linkage which has universal joints formed at each end thereof. The linkage arrangement ensures the maximum amount of relative rotation between the housing and the disc.

A center member structure for use in a motor vehicle is disclosed which is designed to support thereon an engine unit. The center member structure comprises two pipe members arranged side by side and having first portions which extend in parallel and second portions which gradually separate from each other with increase of the distance from generally middle portions of the pipe members; and reinforcing plates welded to given portions of the pipe members to tightly combine the pipe members into a robust unit.

Center member structure for motor vehicle

A power unit mounting structure through which a power unit of an automotive vehicle is supported to a vehicle body. The power unit mounting structure consists of a vehicle body side mount bracket bolted at its one end section to the vehicle body, and a power unit side mount bracket securely connected at its one end section to a transmission case of the power unit. The other end sections of the vehicle body side and power unit side mount brackets are elastically connected through an insulator member with each other. The insulator member is securely disposed inside a rigid support member secured to the other end section of the vehicle body side mount bracket. The insulator member is located lower in level than a joint portion of the vehicle body side mount bracket with the vehicle body. Additionally, a support member is disposed between the insulator support member and a center frame member securely connected to the vehicle body at the joint portion, thereby reinforcing the vehicle body side mount bracket.

Power unit mounting structure

An apparatus for damping a plurality of vibrations applicable to an apparatus for mounting a vehicular engine on a vehicle body. The apparatus comprises: (a) a first block; (b) a second block; (c) a block member for damping first vibrations having high frequencies and having large amplitudes, the first vibrations being generated and transmitted from the first block to the second block; and (d) at least one viscous shearing force resistance generator for damping second vibrations having low frequencies and large amplitudes, the second vibrations being generated and transmitted from the first block to the second block and from the second block to the first block. The viscous shearing force resistance generator is formed within the block member. The viscous shearing force resistance generator, e.g., comprises: (a) a cavity formed within the block member; (b) a viscous fluid having a high viscosity filled within the cavity; and (c) at least one shearing resistant element disposed within the cavity with minute gaps against the opposing inner wall surfaces of the cavity.

Growing community of inventors

Isehara, Japan

Takanobu Ide