Suspension system

A suspension system of a vehicle, comprising:

• a first member supported by a vehicle body of said vehicle;
• a second member supported by a wheel support structure of said vehicle;
• an elongate structure interposed between said first and second members to connect them, said structure including:
• a first rigid member connected to said first member,
• a second rigid member connected to said second member,
• a first elastomeric member secured to said first rigid member and defining a first fluid chamber which is variable in volume,
• a second elastomeric member secured to said second rigid member and defining a second fluid chamber which is variable in volume,
• means defining a fluid communication passage through which said first and second fluid chambers are fluidly connected with each other, said means defining a fluid communication passage including a third rigid member securely connecting said first and second rigid members, said third rigid member having a constant axial length so that the distance between said first and second elastomeric members is substantially constant,
• a fluid filling said first and second fluid chambers and said fluid communication passage, and
• means for forming a fluid dynamic damper with said fluid and said first and second elastomeric members, said fluid dynamic damper having a resonance frequency approximately coincident with a resonance frequency of a vibration system including said elongate structure.