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

• Current Assignee: Valeo Embrayages (Valeo SE)
• Original Assignee: Valeo Embrayages (Valeo SE)
• Inventors: Clausin, Jacques
• Primary Examiner(s): LUONG, VINH
• Application Number:
  US10/473,082
• Publication Number:
  US 20040176171A1
• Time in Patent Office: 2,161 Days
• Field of Search: 745/741, 743/35, 192/48.8, 318/114, 477/5, 180/65.2, 464/68.4, 464/64.1, 267/196
• US Class Current: 74/574.1
• CPC Class Codes: F16F 15/18 using electric, magnetic or electromagnetic means suppression of vibrations of rotating systems by use of non-rotating magnetic or electromagnetic means F16F15/03; dynamo-electric devices H02K; control effected upon generator excitation circuit to reduce harmful effects of overloads or transients H02P9/10
• CPC Class Codes: Y10T 74/2127 with electrical or magnetic damping

Abstract

A filtering device is provided for filtering vibrations transmitted by a rotating engine component (11) adapted to drive in rotation an output shaft (19), which device comprises a drive shaft damper (20) tuned at a frequency substantially locked within a range of frequencies to be damped: electromagnetic modulating systems (23) are designed to adapt the frequency of the damper (20) to the frequency of the vibrations transmitted by the rotary component (11). Moreover, a transmission is provided for motor vehicle comprising a drive shaft (11), linked to a rotary component formed by the motor vehicle engine crankshaft, an output shaft (19) linked to the drive shaft releasable via a clutch, a gearbox (50), the output shaft (19) being the input shaft of the gearbox (50), a filtering device being provided for filtering vibrations emitted, hence transmitted, by the rotary component.

Claims

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).

2. The transmission according to claim 1, wherein the friction disc (16) comprises a torsion damper which constitutes the main damper.

3. The transmission according to claim 1, wherein the reaction plate (112B) constitutes the secondary part of a two-part flywheel (112), the other part of which, namely the primary part (112A), is coupled to the rotary component (111), the primary and secondary parts (112A, 112B) being coupled elastically for rotation together (118).