Apparatus for damping torsional vibrations in the power trains of motor vehicles

Apparatus for damping torsional vibrations, particularly in the power train between the engine and the change-speed transmission of a motor vehicle, comprising a composite flywheel including a rotary first flywheel arranged to receive torque from the engine and a second flywheel coaxial with and rotatable relative to said first flywheel and arranged to transmit torque to the transmission, particularly by way of a friction clutch;

• and damper means operating between and arranged to oppose angular movements of said first and second flywheels relative to each other, said damper means comprising a hydraulic damper including a supply of viscous fluid medium and means for displacing the fluid medium in response to angular movements of at least one of said first and second flywheels relative to the other of said first and second flywheels, said damper means further comprising an elastic damper which operates between and opposes angular movements of said first and second flywheels relative to each other, one of said flywheels having an annular space for said elastic damper and said one flywheel comprising an annular outer wall surrounding said space and two sidewalls flanking said space and extending from said outer wall toward the common axis of said first and second flywheels, one of said sidewalls being disposed between said first and second flywheels, said hydraulic damper comprising at least one partition dividing said space into a pair of compartments and said displacing means comprising pistons arranged to rotate with the other of said first and second flywheels and extending into said compartments at opposite sides of said partition so that each compartment includes a chamber disposed between the respective piston and said partition and containing viscous fluid medium, said partition being arranged to define a passage for the flow of fluid medium from one of said chambers into the other of said chambers or vice versa during certain stages at least of angular movement of at least one of said first and second flywheels relative to the other of said first and second flywheels.

Apparatus for damping torsional vibrations, particularly in the power train between the engine and the change-speed transmission of a motor vehicle, comprising a composite flywheel including a rotary first flywheel arranged to receive torque from the engine and a second flywheel coaxial with and rotatable relative to said first flywheel and arranged to transmit torque to the transmission;

• damper means operating between and arranged to oppose angular movements of said first and second flywheels relative to each other, said damper means comprising a hydraulic damper including a supply of viscous fluid medium and means for displacing the fluid medium in response to angular movements of at least one of said first and second flywheels relative to the other of said first and second flywheels, said damper means further comprising an elastic damper which operates between said first and second flywheels to oppose angular movements of said first and second flywheels relative to each other;
• and a friction clutch arranged to transmit torque from said second flywheel to the input shaft of the transmission, said second flywheel having an annular friction surface and said friction clutch comprising a pressure plate movable axially of said flywheels toward and away from said friction surface and being rotatable with said second flywheel, and a clutch plate connected to the input shaft of the transmission and disposed between said friction surface and said pressure plate.

Apparatus for damping torsional vibrations, particularly in the power train between the engine and the change-speed transmission of a motor vehicle, comprising a composite flywheel including a rotary first flywheel arranged to receive torque from the engine and a second flywheel coaxial with and rotatable relative to said first flywheel and arranged to transmit torque to the transmission;

• damper means operating between and arranged to oppose angular movements of said first and second flywheels relative to each other, said damper means comprising a hydraulic damper including a supply of viscous fluid medium and means for displacing the fluid medium in response to angular movements of at least one of said first and second flywheels relative to the other of said first and second flywheels, said damper means further comprising an elastic damper which operates between said first and second flywheels to oppose angular movements of such flywheels relative to each other, said elastic damper including an input element rotatable with one of said first and second flywheels, an output element rotatable with the other of said first and second flywheels relative to said input element, and energy storing means interposed between said input and output elements;
• and a friction clutch arranged to transmit torque from said second flywheel to the input shaft of the transmission, said second flywheel having an annular friction surface and said friction clutch comprising a pressure plate movable axially of said flywheels toward and away from said friction surface and being rotatable with said second flywheel, and a clutch plate connected to the input shaft of the transmission and disposed between said friction surface and said pressure plate.

Apparatus for damping torsional vibrations, particularly in the power train between the engine and the change-speed transmission of a motor vehicle, comprising a composite flywheel including a rotary first flywheel arranged to receive torque from the engine and a second flywheel coaxial with and rotatable relative to said first flywheel and arranged to transmit torque to the transmission;

• damper means operating between and arranged to oppose angular movements of said first and second flywheels relative to each other, said damper means comprising a hydraulic damper including a supply of viscous fluid medium and means for displacing the fluid medium in response to angular movements of at least one of said first and second flywheels relative to the other of said first and second flywheels, said damper means further comprising an elastic damper arranged to yieldably oppose angular movements of said first and second flywheels relative to each other, said hydraulic damper being disposed in a predetermined plane extending at right angles to the common axis of said first and second flywheels and said elastic damper being disposed in or close to said plane;
• and a friction clutch arranged to transmit torque from said second flywheel to the input shaft of the transmission, said second flywheel having an annular friction surface and said friction clutch comprising a pressure plate movable axially of said flywheels toward and away from said friction surface and being rotatable with said second flywheel, and a clutch plate connected to the input shaft of the transmission and disposed between said friction surface and said pressure plate.

Apparatus for damping torsional vibrations, particularly in the power train between the engine and the change-speed transmission of a motor vehicle, comprising a composite flywheel including a rotary first flywheel arranged to receive torque from the engine and a second flywheel coaxial with and rotatable relative to said first flywheel and arranged to transmit torque to the transmission;

• damper means operating between and arranged to oppose angular movements of said first and second flywheels relative to each other, said damper means comprising a hydraulic damper including a supply of viscous fluid medium and means for displacing the fluid medium in response to angular movements of at least one of said first and second flywheels relative to the other of said first and second flywheels, one of said first and second flywheels including a pair of sidewalls flanking an annular space for said damper means and means for securing said sidewalls to each other, said hydraulic damper including substantially sector-shaped partitions disposed between said sidewalls and having recesses for said securing means;
• and a friction clutch arranged to transmit torque from said second flywheel to the input shaft of the transmission, said second flywheel having an annular friction surface and said friction clutch comprising a pressure plate movable axially of said flywheels toward and away from said friction surface and being rotatable with said second flywheel, and a clutch plate connected to the input shaft of the transmission and disposed between said friction surface and said pressure plate.

Apparatus for damping torsional vibrations, particularly in the power train between the engine and the change-speed transmission of a motor vehicle, comprising a composite flywheel including a rotary first flywheel arranged to receive torque from the engine and a second flywheel coaxial with and rotatable relative to said first flywheel and arranged to transmit torque to the transmission;

• damper means operating between and arranged to oppose angular movements of said first and second flywheels relative to each other, said damper means comprising a hydraulic damper including a supply of viscous fluid medium and means for displacing the fluid medium in response to angular movements of at least one of said first and second flywheels relative to the other of said first and second flywheels, one of said first and second flywheels comprising two sidewalls flanking a space for said hydraulic damper, said hydraulic damper comprising partitions disposed between said sidewalls and having outer surfaces provided with recesses, said hydraulic damper further comprising resilient means reacting against said one flywheel, extending into said recesses and arranged to bias said partitions radially inwardly toward the common axis of said flywheels;
• and a friction clutch arranged to transmit torque from said second flywheel to the input shaft of the transmission, said second flywheel having an annular friction surface and said friction clutch comprising a pressure plate movable axially of said flywheels toward and away from said friction surface and being rotatable with said second flywheel, and a clutch plate connected to the input shaft of the transmission and disposed between said friction surface and said pressure plate.

Apparatus for damping torsional vibrations, particularly in the power train between the engine and the change-speed transmission of a motor vehicle, comprising a composite flywheel including a rotary first flywheel arranged to receive torque from the engine and a second flywheel coaxial with and rotatable relative to said first flywheel and arranged to transmit torque to the transmission;

• damper means operating between and arranged to oppose angular movements of said first and second flywheels relative to each other, said damper means comprising a hydraulic damper including a supply of viscous fluid medium and means for displacing the fluid medium in response to angular movements of at least one of said first and second flywheels relative to the other of said first and second flywheels, said first flywheel having walls flanking an annular space for said hydraulic damper, one of said walls and said second flywheel defining an annular clearance for the circulation of a cooling medium;
• and a friction clutch arranged to transmit torque from said second flywheel to the input shaft of the transmission, said second flywheel having an annular friction surface and said friction clutch comprising a pressure plate movable axially of said flywheels toward and away from said friction surface and being rotatable with said second flywheel, and a clutch plate connected to the input shaft of the transmission and disposed between said friction surface and said pressure plate.