Vibration absorber
A system for absorbing vibration created by operation of an engine of the present invention includes a first plate driven by an engine shaft and a torque transmitting device for transferring torque from the engine shaft to a transmission input shaft. The system includes a first vibration absorber and a second vibration absorber. The first vibration absorber includes at least one selectively moveable mass. The second vibration absorber includes at least one biasing member and generally opposing ends. The first vibration absorber is configured to absorb vibrations created at a first harmonic of the engine and the second vibration absorber is configured to absorb vibrations created at multiple harmonics of the engine.
1. An apparatus for absorbing vibration and transmitting a torque between an output of an engine and an input of a transmission of a vehicle, the apparatus comprising:
a first member interconnected with the output of the engine and including at least one retaining member and at least one alternate retaining member;
a first vibration absorber including at least one mass and at least one alternate mass, the mass supported by the retaining member of the first member and the alternate mass supported by the alternate retaining member of the first member, wherein the mass has a predefined movement path with respect to the first member when the first member is rotating and the alternate mass has a predefined alternate movement path with respect to the first member when the first member is rotating, wherein the mass absorbs a portion of the vibrations through the first member from the engine to the transmission at a first range of engine speeds the alternate mass absorbs a portion of the vibrations through the first member from the engine to the transmission as the alternate mass moves along the alternate movement path at a third range of engine speeds; and
a second vibration absorber including at least one biasing member having a first end interconnected with the first member and a second end interconnected with the input of the transmission, wherein the biasing member is selected to absorb a portion of the vibrations through the second vibration absorber from the engine to the transmission at a second range of engine speeds, and
wherein the speeds of the second range are lower than the speeds of the first range of engine speeds and the third range of engine speeds are greater than engine speeds of the first range of engine speeds.
2. The apparatus of claim 1 wherein the biasing member is a coil spring.
3. The apparatus of claim 1 wherein the first member is a flywheel.
4. The apparatus of claim 1 wherein the first vibration absorber is a centrifugal pendulum vibration absorber and the at least one mass defines an aperture having an aperture surface engaged with the retaining member of the first member, and wherein a profile of the aperture surface defines the movement path of the mass.
5. The apparatus of claim 1 further including a torque transmitting device having an input interconnected with the first member and an output interconnected with the input of the transmission, wherein the torque transmitting device is one of a clutch and a torque converter.
6. The apparatus of claim 5 wherein the first end of the biasing member is directly connected to the first member, the input of the torque transmitting device is directly connected to the second end of the biasing member, and the output of the torque transmitting device is directly connected to the input of the transmission.
7. The apparatus of claim 5 wherein the input of the torque transmitting device is directly connected to the first member, the output of the torque transmitting device is directly connected to the first end of the biasing member, and the second end of the biasing member is directly connected to the input of the transmission.
8. The apparatus of claim 5 further including a third vibration absorber including at least one alternate biasing member having a first end directly connected to the output of the torque transmitting device and a second end directly connected to the input of the transmission, wherein the first end of the biasing member of the second vibration absorber is directly connected to the first member and the second end of the biasing member of the second vibration absorber is directly connected to the input of the torque transmitting device.
9. The apparatus of claim 5 further including a third vibration absorber including at least one alternate biasing member having a first end directly connected to the output of the engine and a second end directly connected to the first member, wherein the input of the torque transmitting device is directly connected to the first member, the output of the torque transmitting device is directly connected to the first end of the biasing member of the second vibration absorber, and the second end of the biasing member of the second vibration absorber is directly connected to the input of the transmission.