Suspension Load Weight Derivation for Accurate Damping Control
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Solution Overview
Problem
Existing load weight derivation methods are inaccurate when there is a significant difference between assumed and actual load weights, leading to inadequate or excessive damping force variations.
Innovation Solution
A load weight derivation device that calculates the contraction of a spring in a suspension system between a vehicle body and a wheel, using a stroke amount and movement of a support member to derive the actual load weight, allowing for precise control of damping force adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If load weight is derived using conventional methods, then the derivation process is simple, but the accuracy of load weight specification deteriorates when there is a significant difference between assumed and actual load weights
Solution Approach 1:
The patent segments the load weight derivation into two distinct components: stroke amount (suspension compression) and support member movement amount (adjustment unit displacement). By measuring these separately and combining them through calculation, the system achieves accurate load weight specification even when actual load differs significantly from assumed load, resolving the accuracy issue without requiring a completely new complex device.
Solution Approach 2:
The patent introduces the support member movement amount as an intermediary measurement that bridges the gap between assumed load and actual load. This intermediary parameter, when combined with stroke amount through calculation, enables accurate derivation of actual load weight, solving the accuracy problem while maintaining a relatively simple derivation process.
2Reliability
If damping force is not adjusted according to actual load weight, then the control system is simple, but vehicle stability and comfort deteriorate
Solution Approach 1:
The patent implements a feedback mechanism where the derived actual load weight (from stroke amount and support member movement) is fed back to the damping force control system. This feedback enables the damping force to be automatically adjusted according to the actual load, improving vehicle stability and comfort while maintaining a relatively simple control system architecture.
Solution Approach 2:
The patent makes the damping force dynamic by linking it to the derived actual load weight. Instead of using a fixed or assumed load value, the system continuously adjusts damping force based on the dynamically derived actual load, thereby improving vehicle performance while keeping the control logic relatively simple.
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
Enables accurate specification of load weight, ensuring appropriate damping force levels are maintained, even with varying loads, thereby improving vehicle stability and comfort.
Implementation Method 1
a spring (22s) arranged between a vehicle main body (10) and a wheel (3)
Data Source
AI summary
The load weight derivation device comprises a calculation unit that calculates a contraction amount of a spring in a suspension positioned between a vehicle body and a vehicle wheel, and a derivation unit that derives the weight loaded on the vehicle body using the contraction amount calculated by the calculation unit.


