Double-isolated, symmetric, high-damped mount system

Details Double-isolated, symmetric, high-damped mount system Double-isolated, symmetric, high-damped mount system

2001-05-11

2004-03-23

Lavinder, Jack (Department: 3683)

Motor vehicles

Power

Having specific motor-to-body-frame relationship

C180S299000

Reexamination Certificate

active

06708793

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to a power train mounting system for a motor vehicle. In one of its aspects, the invention relates to a cradle for mounting the power train in a motor vehicle. In another of its aspects, the invention relates to a power train mounting system isolating the power train from the vehicle frame. In another of its aspects, the invention relates to an isolated cradle mounting system for a transversely mounted power train.
2. Description of the Related Art
A power train for a motor vehicle is typically mounted to a power train cradle, or sub-frame, the cradle being mounted to the motor vehicle frame by vibration-absorbing mounts to attenuate the transfer of vibrations from the power train to the vehicle frame. The prior art typically further includes substantially non-damping connections directly between the power train and the vehicle frame to restrain torque generated by the power train. Such substantially rigid connections are known to serve as a torque brace for a transversely mounted engine, such as is disclosed in U.S. Pat. Nos. 5,133,427 and 4,901,814. Such substantially non-damping connections bypass the vibration isolation elements mounting the cradle to vehicle frame, thereby transferring vibrations from the power train directly to vehicle frame.
It would be advantageous to provide a power train mount system wherein the torque is restrained, and the related vibrations are isolated, within the cradle structure so that the vibrations to the vehicle frame are attenuated.
SUMMARY OF THE INVENTION
A system for mounting a vehicle power train, such as a transversely mounted engine and transmission, to a motor vehicle such that vibrations from the power train are isolated from the vehicle frame. The system comprises a power train mounting cradle for mounting to the vehicle frame by vibration-isolating mounts, and vibration-isolating mounts for connecting the power train to the cradle, at least one of the power train to cradle mounts adapted to damp torque-related vibrations, and further comprising a friction damper to attenuate low-frequency translation-related vibrations.


REFERENCES:
patent: 4240517 (1980-12-01), Harlow et al.
patent: 4451054 (1984-05-01), Allison
patent: 4901814 (1990-02-01), von Broock et al.
patent: 5092566 (1992-03-01), Freudenberg
patent: 5133427 (1992-07-01), Arvidsson et al.
patent: 5291966 (1994-03-01), Kato
patent: 5758738 (1998-06-01), Carroll et al.

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