Effect of the multi-staged clutch damper characteristics on the transmission gear rattle under two engine conditions

The scope of this article is limited to the torsional driveline system of a front-engine front-wheel type of vehicle. A reduced-order model of a manual transmission (with the third gear engaged and the fifth gear unloaded) is developed on the basis of the modal characteristics. A simplified nonlinear mathematical model is then proposed with the focus on the multi-staged clutch damper properties such as the asymmetric transition angles and the pre-loads. The drag torque is estimated under two engine conditions (wide-open throttle and coast) by assuming that the vehicle is in the steady-state condition. Finally, the gear rattle criteria are investigated, and illustrative examples for three real-life clutch dampers are described. In particular, methods for solving the real-life gear rattle phenomenon are suggested.

[1]  Todd E. Rook,et al.  Dynamic analysis of a reverse-idler gear pair with concurrent clearances , 1995 .

[2]  Stefan Dutre,et al.  Prediction of system-level gear rattle using multibody and vibro-acoustic techniques , 2004 .

[3]  J. Dormand,et al.  A family of embedded Runge-Kutta formulae , 1980 .

[4]  Rajendra Singh,et al.  Influence of clutch design on the reduction and perception of automotive transmission rattle noise , 1993 .

[5]  Rajendra Singh,et al.  Analysis of periodically excited non-linear systems by a parametric continuation technique , 1995 .

[6]  Eric P. Trochon.  Analytical formulation of automotive drivetrain rattle problems , 1997 .

[7]  Yasushi Chikatani,et al.  Reduction of Idling Rattle Noise in Trucks , 1991 .

[8]  Andreas Laschet,et al.  Computer Simulation of Vibrations in Vehicle Powertrains Considering Nonlinear Effects in Clutches and Manual Transmissions , 1994 .

[9]  Todd E. Rook,et al.  Computational Issues Associated with Gear Rattle Analysis , 1995 .

[10]  A. P,et al.  Mechanical Vibrations , 1948, Nature.

[11]  C. Padmanabhan,et al.  Dynamics of a piecewise non-linear system subject to dual harmonic excitation using parametric continuation , 1995 .

[12]  Todd E. Rook,et al.  Modeling of Automotive Gear Rattle Phenomenon: State of the Art , 1995 .

[13]  S. Theodossiades,et al.  Lightly loaded lubricated impacts: Idle gear rattle , 2007 .

[14]  R. J. Comparin,et al.  Frequency response characteristics of a multi-degree-of-freedom system with clearances , 1990 .

[15]  Takashi Shimizu,et al.  Mechanism of the Idle Gear Rattle Synchronized with Engine Rotation , 1993 .

[16]  Riccardo Russo,et al.  Theoretical and experimental investigation into the influence of the periodic backlash fluctuations on the gear rattle , 2011 .

[17]  Rajendra Singh,et al.  Effect of nonlinear impact damping on the frequency response of a torsional system with clearance , 2005 .

[18]  Jong-Yun Yoon,et al.  Dynamic force transmitted by hydraulic mount: Estimation in frequency domain using motion and/or pressure measurements and quasi-linear models , 2010 .

[19]  J.-L. Tébec,et al.  Experimental study of gear rattle excited by a multi-harmonic excitation , 2007 .

[20]  H Rahnejat,et al.  An investigation of manual transmission drive rattle , 2010 .

[21]  Wolfgang Novak,et al.  Noise reduction and efficiency improvements via Clatter and Rattle Noise Free (CARF-)Transmissions , 2007 .

[22]  Friedrich Pfeiffer,et al.  Theoretical and experimental investigations of gear-rattling , 1991 .

[23]  Rajendra Singh,et al.  Dynamic analysis of automotive clutch dampers , 2000 .

[24]  Rajendra Singh,et al.  Effect of smoothening functions on the frequency response of an oscillator with clearance non-linearity , 2003 .

[25]  Rajendra Singh,et al.  Analysis of automotive neutral grear rattle , 1989 .

[26]  Rajendra Singh,et al.  Dynamic interactions between loaded and unloaded gear pairs under rattle conditions , 2001 .

[27]  윤종윤.  Effect of Multi-Staged Clutch Damper Characteristics on Vibro-Impacts within a Geared System , 2014 .

[28]  C. Padmanabhan,et al.  Spectral coupling issues in a two-degree-of-freedom system with clearance non-linearities , 1992 .

[29]  Kyeong Uk Kim,et al.  Reduction of PTO rattle noise of an agricultural tractor using an anti-backlash gear , 2008 .

[30]  R. J. Comparin,et al.  Non-linear frequency response characteristics of an impact pair , 1989 .

[31]  Homer Rahnejat,et al.  The Tribo-Contact Dynamics Phenomenon in Torsional Impact of Loose Gears - Promoting Gear Rattle , 2002 .

[32]  Mehmet Bozca,et al.  Empirical model based optimization of gearbox geometric design parameters to reduce rattle noise in an automotive transmission , 2010 .

[33]  Pietro Bellomo,et al.  In Depth Study of Vehicle Powertrains to Identify Causes of Loose Components Rattle in Transmissions , 2002 .

[34]  Michael Yu Wang,et al.  Numerical Modelling and Analysis of Automotive Transmission Rattle , 2002 .

[35]  Rajendra Singh,et al.  Super- and sub-harmonic response calculations for a torsional system with clearance nonlinearity using the harmonic balance method , 2005 .

[36]  Tsutomu Fujimoto,et al.  Predictive Calculation of Idling Rattle in Manual Transmissions -Based on Experimental Measurements of Gear Vibration Occurring in Backlashes- , 2003 .

[37]  J. Der Hagopian,et al.  Vehicle driveline dynamic behaviour experimentation and simulation , 1998 .