Analysis of start-up transient for a powertrain system with a nonlinear clutch damper

Abstract The transient vibration phenomenon in a vehicle powertrain system during the start-up (or shut-down) process is studied with a focus on the nonlinear characteristics of a multi-staged clutch damper. First, a four-degree-of-freedom torsional model with multiple discontinuous nonlinearities under flywheel motion input is developed, and the powertrain transient event is validated with a vehicle start-up experiment. Second, the role of the nonlinear torsional path on the transient event is investigated in the time and time−frequency domains; interactions between the clutch damper and the transmission transients are estimated by using two metrics. Third, the harmonic balance method is applied to examine the nonlinear characteristics of clutch damper during a slowly varying non-stationary process in a simplified and validated single-degree-of-freedom powertrain system model. Finally, analytical formulas are successfully developed and verified to approximate the nonlinear amplification level for a rapidly varying process.

[1]  Ming L. Kuang,et al.  An Investigation of Engine Start-Stop NVH in A Power Split Powertrain Hybrid Electric Vehicle , 2006 .

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

[3]  Vladimir I. Babitsky,et al.  Vibration of Strongly Nonlinear Discontinuous Systems , 2001 .

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

[5]  Gunnar Hok.  Erratum: Response of Linear Resonant Systems to Excitation of a Frequency Varying Linearly with Time , 1948 .

[6]  L. Meirovitch,et al.  Fundamentals of Vibrations , 2000 .

[7]  Laihang Li,et al.  Analysis of Speed-Dependent Vibration Amplification in a Nonlinear Driveline System Using Hilbert Transform , 2013 .

[8]  H Jacobsson.  Disc brake judder considering instantaneous disc thickness and spatial friction variation , 2003 .

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

[10]  Georg Eisele,et al.  Aspects of NVH Integration in Hybrid Vehicles , 2009 .

[11]  Ray Shaver.  Manual transmission clutch systems , 1997 .

[12]  Rajendra Singh,et al.  Envelope and order domain analyses of a nonlinear torsional system decelerating under multiple order frictional torque , 2013 .

[13]  Hsiu-Ying Hwang,et al.  Engine automatic start–stop dynamic analysis and vibration reduction for a two-mode hybrid vehicle , 2013 .

[14]  Rajendra Singh,et al.  Analysis of vibration amplification in a multi-staged clutch damper during engine start-up , 2015 .

[15]  Hiroo Yamaoka,et al.  Development of HEV Engine Start-Shock Prediction Technique Combining Motor Generator System Control and Multi-Body Dynamics (MBD) Models , 2013 .

[16]  Rajendra Singh,et al.  Effect of the multi-staged clutch damper characteristics on the transmission gear rattle under two engine conditions , 2013 .

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

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

[19]  R. Markert,et al.  Analytically based estimation of the maximum amplitude during passage through resonance , 2001 .

[20]  Dean Tomazic,et al.  Integration of Engine Start/Stop Systems with Emphasis on NVH and Launch Behavior , 2013 .

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

[22]  Andres Soom,et al.  Mechanical Vibration Analysis and Computation , 1989 .

[23]  M. Feldman.  Hilbert transform in vibration analysis , 2011 .

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

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

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

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

[28]  Rajendra Singh,et al.  Analysis of transient amplification for a torsional system passing through resonance , 2015 .

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

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

[31]  Rajendra Singh,et al.  Order domain analysis of speed-dependent friction-induced torque in a brake experiment , 2012 .