Power plant supporting mount

A power plant supporting mount comprising:

• an inner pipe and an outer pipe;
• a vibration absorbing member interposed between the inner pipe and the outer pipe;
• a rolling restriction member connected to the inner pipe which restricts the power plant from vibrating more than a predetermined amount with relation to a vehicle frame;
• first and second fluid chambers formed in the vibration absorbing member which are filled with operating fluid;
• first and second fluid communicating passages connecting the first and second fluid chambers;
• a displacement reaction portion provided in the outer pipe which reacts to substantial movement by the outer pipe by contact with the rolling restriction member, the displacement reaction portion including a slide rod mounted in the outer pipe and able to undergo rectilinear movement therein, first and second stoppers mounted on opposing extremes of the slide rod extending in a direction toward the rolling restriction member, and elastic members elastically supporting slide rod to maintain the same in a central position with respect to the outer pipe;
• and
• a fluid passage adjusting portion which decreases a size of the second fluid communicating passage in direct proportion to the amount of rolling of the engine or transmission to which the displacement reaction portion responds.