Two-chamber engine mount with hydraulic damping

Claim 1

Two-chamber engine mount with hydraulic damping, comprising a housing, an intermediate plate disposed in said housing dividing said housing into an upper chamber above said intermediate plate and a lower chamber below said intermediate plate, both of said chambers to be filled with fluid, said intermediate plate having a damping opening formed therein for fluid passage, an upper rubbery elastic peripheral wall at least partially defining said upper chamber, a lower cup-shaped rubbery elastic peripheral wall with a given hardness at least partially defining said lower chamber, an upper motor support plate disposed above said upper chamber, said upper support plate having a membrane chamber centrally formed therein to be filled with air, and an elastic rubbery membrane having a hardness greater than said given hardness of said lower peripheral wall, said rubbery membrane separating said membrane chamber from said upper chamber and being disposed in a plane extending through said upper rubbery elastic peripheral wall so that said membrane and said upper elastic peripheral wall are disposed in parallel operative relationship, and the diameter of said rubbery membrane being at most one-third the size of the largest diameter of said upper chamber.