Vehicle suspension system with jounce bumper

In a vehicle suspension system including a bumper stop, a jounce bumper comprising:

• a first rigid support comprising a circular cylindrical first end and a radially flared second end;
• an elastomeric spring seat integrally molded to the radially flared second end of the first rigid support forming an annular body integral with and radially exterior of the flared end;
• a second rigid support having a rigid cylindrical wall, a first open end and a planar substantially closed end, wherein the rigid cylindrical wall is press-fit into the circular cylindrical first end of the first rigid support, wherein the planar substantially closed end is axially interior of the circular cylindrical first end of the first rigid support and the first open end is axially exterior of the circular cylindrical first end of the first rigid support;
• an outer bumper member having a second open end and a substantially closed end, the outer bumper member defining a cylindrical passage bordered by an inner cylindrical wall at the second open end, wherein the second open end is mounted radially interior of the rigid cylindrical wall and abuts the planar substantially closed end of the second rigid support;
• and
• a substantially solid inner bumper member of cylindrical shape and size to fit within the cylindrical passage, having a radially exterior surface radially interfering with a predetermined axial length of the inner cylindrical wall, wherein, during compression of the outer bumper member, the inner bumper member cooperates with the rigid cylindrical wall to trap the second open end of the outer bumper member, wherein the spring rate of the outer bumper is passively increased by the inner bumper cooperating with the rigid cylindrical wall.

In a vehicle suspension system including a bumper stop, a jounce bumper comprising:

• a rigid support having a rigid cylindrical wall, a first open end and a first substantially closed end;
• an outer bumper member having second open end and a second substantially closed end, the outer bumper member defining a cylindrical passage bordered by an inner cylindrical wall at the second open end, wherein the second open end is mounted radially interior of the rigid cylindrical wall and abuts the first substantially closed end of the rigid support;
• and
• an inner bumper member of cylindrical shape and size to fit within the cylindrical passage, having a radially exterior surface radially interfering with a predetermined axial length of the inner cylindrical wall, wherein the inner bumper member is trapped between the second substantially closed end of the outer bumper member and the first substantially closed end of the rigid support wherein, during compression of the outer bumper member, the inner bumper member cooperates with the rigid cylindrical wall to trap the second open end of the outer bumper member, wherein the spring rate of the outer bumper is passively increased by the inner bumper cooperating with the rigid cylindrical wall.