Vibration isolation for parallel hydraulic hybrid vehicles

In recent decades, several types of hybrid vehicles have been developed in order to improve the fuel economy and to reduce the pollution. Hybrid electric vehicles (HEV) have shown a significant improvement in fuel efficiency for small and medium-sized passenger vehicles and SUVs. HEV has several limitations when applied to heavy vehicles; one is that larger vehicles demand more power, which requires significantly larger battery capacities. As an alternative solution, hydraulic hybrid technology has been found effective for heavy duty vehicle because of its high power density. The mechanical batteries used in hydraulic hybrid vehicles (HHV) can be charged and discharged remarkably faster than chemical batteries. This feature is essential for heavy vehicle hybridization. One of the main problems that should be solved for the successful commercialization of HHV is the excessive noise and vibration involving with the hydraulic systems. This study focuses on using magnetorheological (MR) technology to reduce the noise and vibration transmissibility from the hydraulic system to the vehicle body. In order to study the noise and vibration of HHV, a hydraulic hybrid subsystem in parallel design is analyzed. This research shows that the MR elements play an important role in reducing the transmitted noise and vibration to the vehicle body. Additionally, locations and orientations of the isolation system also affect the efficiency of the noise and vibration mitigation. In simulations, a skyhook control algorithm is used to achieve the highest possible effectiveness of the MR isolation system.

[1]  Mark J. Schulz,et al.  A Magnetorheological Semi-Active Isolator to Reduce Noise and Vibration Transmissibility in Automobiles , 2003 .

[2]  Young Kong Ahn,et al.  On the design and development of a magneto-rheological mount , 1999 .

[3]  S. Ikeo,et al.  Study on Hybrid Vehicle Using Constant Pressure Hydraulic System with Flywheel for Energy Storage , 2004 .

[4]  Dean Karnopp,et al.  Vibration Control Using Semi-Active Force Generators , 1974 .

[5]  R. P. Kepner.  Hydraulic Power Assist − A Demonstration of Hydraulic Hybrid Vehicle Regenerative Braking in a Road Vehicle Application , 2002 .

[6]  Brian Anthony Reichert.  Application of Magnetorheological Dampers for Vehicle Seat Suspensions , 1997 .

[7]  Young Kong Ahn,et al.  A Small-sized Variable-damping Mount using Magnetorheological Fluid , 2005 .

[8]  J. D. Carlson,et al.  COMMERCIAL MAGNETO-RHEOLOGICAL FLUID DEVICES , 1996 .

[9]  Björn Andersson,et al.  Metal resource constraints for electric-vehicle batteries , 2001 .

[10]  Mehdi Ahmadian.  On the development of fuzzy skyhook control for semiactive magneto-rheological systems , 2005, SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring.

[11]  Hiroshi Sugita,et al.  Noise and Vibration Reduction Technology in Hybrid Vehicle Development , 2001 .

[12]  Hideki Matsuoka,et al.  NV countermeasure technology for a cylinder-on-demand engine - : Development of active control engine mount , 2004 .

[13]  A. Akanda,et al.  Application of Evolutionary Computation in Automotive Powertrain Mount Tuning , 2006 .

[14]  Lester B. Lave,et al.  BATTERY-POWERED VEHICLES: OZONE REDUCTION VERSUS LEAD DISCHARGES , 1996 .

[15]  Jacek S. Stecki,et al.  Development and Simulation of a Hydraulic-Hybrid Powertrain for use in Commercial Heavy Vehicles , 2003 .

[16]  Akira Takahashi,et al.  NV Countermeasure Technology for a Cylinder-On-Demand Engine- Development of Active Booming Noise Control System Applying Adaptive Notch Filter , 2004 .

[17]  Wei-Hsin Liao,et al.  Modeling and control of magnetorheological fluid dampers using neural networks , 2005 .

[18]  M. Prek.  The impact of geometrical parameters on hydrodynamic noise generation , 2000 .

[19]  Young-Pil Park,et al.  H8 Control Performance of a Full-Vehicle Suspension Featuring Magnetorheological Dampers , 2002 .

[20]  K A Edge.  Designing quieter hydraulic systems - some recent developments and contributions (Invited keynote paper) , 1999 .

[21]  Young Kong Ahn,et al.  Performance Analysis of Magneto-Rheological Mounts , 1999 .

[22]  Keith A. Williams,et al.  Torsional vibration control with an MR fluid brake , 2005, SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring.

[23]  Menahem Anderman,et al.  The challenge to fulfill electrical power requirements of advanced vehicles , 2004 .

[24]  Shin Morishita,et al.  Optimal design of an engine mount using an enhanced genetic algorithm with simplex method , 2005 .