Brakes – Inertia of damping mass dissipates motion – Resiliently supported damping mass
Reexamination Certificate
1998-11-12
2001-11-27
Graham, Matthew C. (Department: 3613)
Brakes
Inertia of damping mass dissipates motion
Resiliently supported damping mass
C188S380000, C267S141200
Reexamination Certificate
active
06321890
ABSTRACT:
TECHNICAL FIELD
The present invention relates to a vibration reducing system for automotive vehicles. More specifically, the present invention relates to a vibration reducing system which is disposed between an engine and a vehicle body, and which is adapted to reduce noise and vibration transmitted from the engine to the vehicle body.
BACKGROUND ART
In Japanese Non examined Patent Publication (Tokkai) No. 9-240292 there is disclosed a device for reducing noise and vibration generated by an engine. This related art includes an insulator disposed between an engine and a vehicle body which reduces the noise and vibration transmitted from the engine to the vehicle body.
When installing a vibration damper such as a dynamic damper or a mass damper in the above type of vibration reducing system, there can be obtained a further reduction of the noise and vibration by use of a relatively large space for installation of the vibration damper to the vibration reducing system. However, the degree of difficulty of installing the dynamic damper on the vibration reducing device is increased because of the crowded engine compartment and the limited space in and around the engine.
DISCLOSURE OF INVENTION
It is an object of the present invention to provide a vibration reducing system for an automotive vehicle which facilitates installation of the vibration damper to the vibration reducing system.
It is another object of the present invention to provide a vibration reducing system for an automotive vehicle which minimizes the space required for installation of the vibration damper.
A further object of the present invention to provide a vibration reducing system for an automotive vehicle which will reduce the vibration and the associated noise, even if the mass of the vibration damper is relatively small.
In brief, the above objects are achieved by an arrangement wherein, in order to facilitate installation of the vibration damper to the vibration reducing device, the arrangement comprises a vibration damper secured to a side of the insulator which is distal from engine.
More specifically, an aspect of the invention resides in a vibration reducing system for automotive vehicles comprising: an attachment part connected to a power unit; an insulator having a first inner cylinder, a first elastic member which is connected to an outer surface of the first inner cylinder, and a first outer cylinder which is connected to an outer surface of the first elastic member, and connected to a vehicle body; a connection part having a pin which is fitted into the first inner cylinder, and connected to the attachment part; and a vibration damper secured to said insulator at a side which is distal from the power unit.
REFERENCES:
patent: 4381043 (1983-04-01), Fukushima
patent: 4406344 (1983-09-01), Fukushima
patent: 4456213 (1984-06-01), Fukushima et al.
patent: 5052530 (1991-10-01), Shimazaki
patent: 5156380 (1992-10-01), Cerruti et al.
patent: 26 32 574 (1978-01-01), None
patent: 9-263143 (1997-10-01), None
Anzai Kouji
Ishizu Seiji
Suzuki Yasuhiro
Graham Matthew C.
McDermott & Will & Emery
Nissan Motor Co,. Ltd.
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