Vehicle Wheel Balancing Method with Dynamic Static Tolerance

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Solution Overview

Problem

Existing vehicle wheel balancing methods often require excessive weights for sufficient quality, leading to unnecessary vibrations during driving, and are inefficient in measurement runtime.

Innovation Solution

The method measures forces from a rotating vehicle wheel to calculate imbalance compensation masses in specific rotational angle positions, allowing for dynamic and static imbalance compensation with greater mass deviation tolerance in dynamic balancing, reducing the need for excessive weights and shortening measurement runtime by stopping when calculated masses remain within tolerances.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If conventional wheel balancing methods are used with small mass deviation tolerances, then static balancing precision is improved, but excessive balancing weights are required and measurement runtime increases

Engineering Contradiction:

Improvestatic balancing precisionVSAvoidmeasurement runtime

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The patent applies parameter changes by establishing different tolerance levels for different balancing types: a first (larger) tolerance for dynamic balancing and a second (smaller) tolerance for static balancing. This allows the measurement process to terminate early when dynamic balancing criteria are met, reducing measurement runtime while maintaining sufficient overall balancing quality.

Inventive Principle:

Principle #35Parameter changes

2Measurement precision

If small mass deviation tolerances are applied for dynamic balancing, then balancing precision is improved, but the number and size of balancing weights increase

Engineering Contradiction:

Improvedynamic balancing precisionVSAvoidbalancing weight quantity

Core Design Contradiction:

Measurement precisionVSQuantity of substance

Solution Approach 1:

The patent changes the tolerance parameter for dynamic balancing to a larger first tolerance value, which reduces the stringency of the balancing requirement. This allows the dynamic balancing to be achieved with fewer and smaller balancing weights, reducing the total quantity of balancing material needed while maintaining sufficient dynamic balancing quality for driving.

Inventive Principle:

Principle #35Parameter changes

3Manufacturing precision

If uniform small tolerance is applied to both dynamic and static balancing, then overall balancing quality is improved, but measurement runtime and weight usage increase unnecessarily

Engineering Contradiction:

Improveoverall balancing qualityVSAvoidmeasurement efficiency

Core Design Contradiction:

Manufacturing precisionVSProductivity

Solution Approach 1:

The patent applies local quality by differentiating tolerance requirements between different balancing aspects: larger tolerance for dynamic balancing (affecting rotational stability) and smaller tolerance for static balancing (affecting steering stability). This localized differentiation allows each aspect to be optimized independently, achieving sufficient overall quality while improving measurement efficiency.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent introduces two distinct tolerance parameters: a first tolerance for dynamic balancing and a second tolerance for static balancing. By changing from a uniform tolerance parameter to differentiated parameters, the system achieves better productivity while maintaining adequate manufacturing precision for both dynamic and static balancing requirements.

Inventive Principle:

Principle #35Parameter changes

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

This approach achieves effective vehicle wheel balancing with reduced weight usage and shorter measurement times by allowing larger mass deviations for dynamic balancing and ensuring static balancing within specified tolerances, thereby minimizing vibrations and improving driving stability.

Implementation Method 1

forces resulting from a wheel imbalance are measured in a measuring run on the rotating vehicle wheel

Methodology Applied

Scientific EffectForce measurement: Force

Data Source

PatentEP2019303B1Method for balancing a vehicle wheel

Publication Date: 2010.04.21 SNAP ON EQUIP SRL

AI summary

A vehicle wheel (1) balancing method involves setting permissible mass deviation from respective exact balancing mass corresponding to the measured forces for dynamic balancing greater than the permissible mass deviation for static balancing in calculation of respective balancing masses; and fixing a balancing weight corresponding to the respectively calculated balancing mass to the vehicle wheel in the associated angular position and associated balancing plane.