PDF Free Download | Minimizing of Automotive Transmission Rattle Noise by Means of Gear Oils by Axel Baumann
Contents of Minimizing of Automotive Transmission Rattle Noise
- Introduction
- Issue
- Task and Objective of the Work
- Structure of the Work
- State of the Art in Research and Technology
- Market and Development Situation of Vehicle
- Transmissions
- Torsional Vibration Behavior of Internal Combustion
- Engines
- Requirements and Structure of Vehicle Transmissions in Spur Gear Design
- Work on Rattling Noise Behavior of Vehicle Transmissions
- Measures to Minimize Rattle Noise from Vehicle
- Transmissions
- Transmission Power Loss
- Gear Rattling Noises from Vehicle Transmissions
- Gear Rattling
- Synchronizer Ring Rattling
- Rattle Noise Analysis of Vehicle Transmissions
- Test Bench Setup and Test Execution
- Acoustic Properties of the Soundproof Cabin
- Lubricants as Design Elements
- Tasks and Requirement Profile of a Gear Lubricant
- Chemical Composition of Gear Oils
- Mineral Oil Based Base Oils
- Polyether Oils
- Synthetic Hydrocarbons
- Carboxylic Acid Esters
- Additives
- Mechanical Properties of Gear Oils
- Viscosity
- Density
- Selected Test Procedures for Testing Gear Oils
- Contact Angle Measurement
- Mini Traction Machine for Measuring the Coefficient of Friction
- Flow Behavior under Shear Stress
- Parameter Variation of Base Oils and Additives
- Structure of the Manual Transmission for Front-Transverse Drive
- Test Procedure
- Rattle Noise Investigations
- Standard Gear Oils, Adhesion Additive and Wetting Agent
- Gear Oils Based on Polyalkylene Glycols
- Base Oil Type Variation
- Variation of VI Improvers
- Different Concentrations of Dispersant PAMA
- Various VI Improvers in High Concentration
- Formulations with Ester Oils
- Effect of Friction Modifier and Antifoam Agent
- Measurement of the Drive-Side Torque Loss
- Notes on formulating an optimized gear oil
- Correlation between Oil and Geometric Parameters
- Structure of the Single-Stage Test Gearbox
- Test Procedure
- Gear Rattle Experiments
- Oil Level Variation
- Variation of the Oil Sump Temperature
- Contribution of Synchronizers
- Influence of a Relative Speed Between Gear Shaft and Idler Gear
- Influence of the Oil Type with Different Torsional Backlashes
- Dependence between Axial and Torsional Backlash
- Synchronizer Ring Rattling Experiments
- Variation of Oil Sump Temperature
- Influence of a Relative Speed between the Synchronizer Hub and Synchronizer Ring
- Variation of the Clearance between Synchronizer
- Hub and Synchro-Ring
- Mechanism of Gear Rattling Noise Generation
- Rotational Path Deviation Without Torsional Vibration
- Excitation
- Comparison of Straight and Helical Gears
- Influence of Torsional Backlash with Helical Idler Gear in the Non-Shifted State
- Variation of the Oil Type with Helical Gearing
- Summary of the Mechanism of Rattling Noise Generation
