Hydraulic powertrain mount with dual low frequency inertia tracks and decoupling membrane with synchronous switching mechanization

A powertrain mount for a vehicle comprising:

• a housing;
• first and second compliant members coupled to and cooperating with the housing;
• a port extending through the housing;
• an inertia track assembly disposed within the housing forming a first fluid chamber with the first compliant member and forming a second fluid chamber with the second compliant member, the inertia track assembly having at least first and second channels extending through the inertia track assembly for conducting fluid between the first fluid chamber and the second fluid chamber, wherein the inertia track assembly forms an air chamber having a first end and a second end in communication with the port;
• a decoupler disposed in and cooperating with the first end of the air chamber;
• and
• a switching apparatus operatively connected to the housing and selectively positionable relative to the inertia track assembly, the switching apparatus including an actuator and a plunger synchronously positionable to open and close the second channel and air chamber of the inertia track assembly, wherein the plunger includes a first portion positionable relative to the second channel and a second portion positionable relative to the air chamber, wherein the first portion and second portion are synchronously positionable between a first position and a second position to open and close the second channel and air chamber of the inertia track assembly,
• wherein the first and second portions of the plunger are synchronously positionable between the first position wherein the first portion is moved away from the second channel to open the second channel and the second portion is moved away from the air chamber to open the air chamber and unlock the decoupler and the second position wherein the actuator is energized to move the first portion to close the second channel and the second portion closes the air chamber to lock the decoupler to force fluid through the first channel to enable two damping peaks at distinct frequencies.

A powertrain mount for a vehicle comprising:

• a housing;
• first and second compliant members coupled to and cooperating with the housing;
• a port extending through the housing;
• an inertia track assembly disposed within the housing forming a first fluid chamber with the first compliant member and forming a second fluid chamber with the second compliant member, the inertia track assembly having at least first and second channels extending through the inertia track assembly for conducting fluid between the first fluid chamber and the second fluid chamber, wherein the inertia track assembly forms an air chamber having a first end and a second end in communication with the port;
• a decoupler disposed in and cooperating with the first end of the air chamber;
• and
• a switching apparatus operatively connected to the housing and selectively positionable relative to the inertia track assembly, the switching apparatus including an actuator and a plunger synchronously positionable to open and close the second channel and air chamber of the inertia track assembly,
• wherein the plunger includes a first portion positionable relative to the second channel and a second portion having a projection extending from the plunger to be disposed within and adjustable relative to an opening in the air chamber, wherein the first portion and second portion are synchronously positionable between a first position and a second position to open and close the second channel and air chamber of the inertia track assembly,
• wherein the first portion and projection of the second portion of the plunger are synchronously positionable between the first position wherein the first portion is moved away from the second channel to open the second channel and the projection of the second portion closes the air chamber to lock the decoupler and the second position wherein the actuator is energized to move the first portion to close the second channel and the projection of the second portion moves within the air chamber to open the air chamber and unlock the decoupler to enable two damping peaks at distinct frequencies.