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Device for filtering rotation and transmission vibrations for motor vehicle comprising same

  • US 7,347,122 B2
  • Filed: 04/25/2002
  • Issued: 03/25/2008
  • Est. Priority Date: 05/04/2001
  • Status: Expired due to Term
First Claim
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1. A transmission for a motor vehicle comprising:

  • a drive shaft (11, 111) coupled to an engine of the motor vehicle;

    an output shaft (19, 119, 219) coupled to the drive shaft releasably through a clutch;

    a gearbox (50) drivingly connected to the output shaft (19, 119, 219); and

    a filtering device provided for filtering out vibrations emitted and transmitted by the drive shaft (11, 111) to the output shaft (19, 119, 219);

    the filtering device comprising a drive shaft damper (20, 120, 220) tuned to a frequency which is inside the range of frequencies to be damped out, and a modulating device of the electromagnetic type provided for matching the frequency of the damper (20, 120, 220) to the frequency of the vibrations transmitted by the drive shaft (11, 111), wherein the clutch comprises a reaction plate (12, 112B) which is coupled to the drive shaft (11, 111), a pressure plate (14, 114) coupled to the reaction plate (12, 112B) but displaceable axially with respect thereto, the reaction plate (12, 112B) and pressure plate (14, 114) being adapted to clamp therebetween, under the action of axially acting resilient means (15), a friction disc (16, 116), the friction disc (16, 116) having a hub (17, 117) which is mounted on the output shaft (19, 119, 219).

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