Noise and torsional vibration analysis of hybrid vehicles Intro Preface Acknowledgments Nomenclature Introduction Structural Description and Work Principle of Full Hybrid Vehicles The Efficiency of the Transmission System Hybrid Driving Mode Pure Electric Driving Mode Over Speed Driving Mode Standstill Charging Mode Conclusion NVH Testing and Analysis of Hybrid Powertrains Prepare of Experiments Test Environment Test Equipment Measuring Point Arrangement Description of the Test Program and Conditions Analysis of the Experimental Results Test Results of Working Condition 1 Test Results of Working Condition 2 Test Results of Working Condition 3 Test Results of Working Condition 4 Test Results of Working Condition 5 Conclusions Transmission System Parameters and Meshing Stiffness Calculation Gear Pair Meshing Impact Response Analysis Calculation of Impact Acceleration and Impact Time Calculation of Impact Acceleration Sound Pressure Analysis of Results Conclusions Mathematical Modeling and TV Analysis of Hybrid Electric Vehicles Dynamic Modeling of the Compound Planetary Gear Set The Torsional Dynamic Model of the Power Split Hybrid System Numerical Analysis of Natural Frequencies and Modes Conclusion Modeling of the Hybrid Powertrain with ADAMS Modeling of the Hybrid Powertrain with ADAMS Comparison and Verification of the Two Models Analysis on the Forced Vibration (FV) Influence of Varying Damping of Torsional Damper on Frequency Response Influence of Varying Stiffness of Torsional Damper on Frequency Response Influence of the Flywheels MOI on Frequency Response Influence of Varying Stiffness of Half Shaft on Frequency Response Influence of Varying Damping of Half Shaft on Frequency Response Influence of Wheel TS Variation on the TV of Powertrain TV Characteristics and Optimization Analysis of Dual Mass Flywheel TV Characteristics and Optimization Analysis of Dual Mass Flywheel Advantage of DMF Dynamic Modeling and Parameter Selection of DMF Influence of the Rotational Inertia Ratio of DMF Influence of the TS of DMF Influence of the Damping of DMF Conclusions References Authors Biographies Blank Page