Wheel-Tire Assembly Phase Alignment for RFV Vibration Reduction
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Solution Overview
Problem
Existing wheel and tire assemblies often suffer from imbalance, leading to vehicle vibrations and reduced riding comfort due to manufacturing inaccuracies, which current balancing methods fail to adequately address.
Innovation Solution
A method involving measuring and aligning the maximum-value position of the tire's radial force variation with the minimum-value position of the synthesized internal and external runout waveforms of the wheel, ensuring both components are phase-aligned to reduce dynamic imbalance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional balancing methods are used, then manufacturing simplicity is maintained, but vibration reduction effectiveness is insufficient
Solution Approach 1:
The patent applies preliminary action by measuring and marking the maximum-value position of RFV on the tire before assembly, and determining the minimum-value position of the synthesized runout waveform on the wheel before assembly. These reference positions are pre-established so that when the tire and wheel are assembled, the reference positions align automatically, achieving vibration reduction through pre-planned phase alignment rather than trial-and-error balancing.
Solution Approach 2:
The patent transitions from traditional single-dimensional balancing (weight distribution) to a multi-dimensional approach by simultaneously considering RFV waveform characteristics and runout waveform characteristics. The synthesis of internal and external runout waveforms creates a comprehensive reference that incorporates multiple measurement dimensions, enabling more effective vibration reduction than conventional methods.
2Manufacturing precision
If precise waveform synthesis and phase alignment are implemented, then balancing precision is improved, but measurement and operation complexity increases
Solution Approach 1:
The patent replaces traditional mechanical balancing methods with waveform-based measurement and synthesis. Instead of relying solely on physical weight adjustments, the system uses RFV waveform measurement, runout waveform measurement, and digital synthesis to determine optimal phase alignment. This substitution of mechanical procedures with measurement-and-analysis procedures achieves higher precision while providing clear operational guidance through waveform visualization.
Solution Approach 2:
The patent changes the fundamental parameters used for balancing from simple weight measurements to complex waveform characteristics (RFV amplitude, runout amplitude, phase angles). By measuring and analyzing these parameters and synthesizing them into reference waveforms, the system achieves superior balancing precision. The parameter transformation from physical quantities to waveform representations enables more nuanced control over balancing outcomes.
Data Source
AI summary
A method of balancing an assembly of a wheel and a tire, may include measuring a maximum-value position of RFV of a tire and marking the measured maximum-value position, as a tire reference position, measuring each of the internal runout and external runout of the wheel, extracting a primary component of a waveform of the measured internal runout and a primary component of a waveform of the measured external runout and setting the former and latter measured primary components to be internal and external runout waveforms, respectively, synthesizing the internal and external runout waveforms and marking a minimum-value position on a synthesis waveform resulting from the synthesizing, as a wheel reference position, and aligning the tire reference position on the tire and the wheel reference position on the wheel to have the same phase and assembling the wheel and the tire.