Abstract: The present invention is drawn to a structure for supporting suspension arms connected with a wheel supporting member on a vehicle body having a main frame and a side sill, which extend in the longitudinal direction of the vehicle body side by side. The structure includes a bracket which pivotally supports a swing arm on the main frame and the side sill, whereby load on the swing arm is distributed to the main frame and the side sill. And, the rigidity of the vehicle body is improved by the connection of the main frame to the side sill with the bracket.

Abstract: For reducing vibrations having different frequencies and transmitted to a chassis of a vehicle, a vibration-proof apparatus mounted on a support member supporting a vibratory body on the chassis includes a first dynamic damper and a second dynamic damper secured to the support member, such dynamic dampers being arranged to absorb vibrations having different frequencies. The apparatus is particularly applicable to a subframe which undergoes vibrations from a differential device and from a propeller shaft.

Abstract: In a suspension system for a vehicle, each of front and rear suspensions for respectively supporting the front and rear wheels is connected to the vehicle body by way of an adjustable-height supporting member which supports the vehicle body to be variable in height, and at the same time, the front and rear suspensions are arranged so that the rate of change of the roll center height due to bump/rebound is larger in the rear suspension than in the front suspension. The adjustable-height supporting member is controlled to change the vehicle height according to the vehicle speed to be higher during low speed travel than during high speed travel.