Pneumatic Suspension Cross-Flow Equalization

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Solution Overview

Problem

Air suspension systems in vehicles often experience persistent pressure imbalances due to dynamic weight shifts during turns, leading to uneven leveling, as existing leveling valves overcompensate and fail to account for pressure differentials between air springs.

Innovation Solution

An enhanced pneumatic suspension system with two independent pneumatic circuits and a cross-flow mechanism that connects the circuits when both leveling valves are in a neutral mode, allowing for equalization of air pressure between sides of the vehicle.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If leveling valves independently adjust air pressure to each side of the vehicle, then height control is improved, but pressure imbalance between sides persists

Engineering Contradiction:

Improveheight control accuracyVSAvoidpressure balance stability

Core Design Contradiction:

Measurement precisionVSReliability

Solution Approach 1:

The patent merges the previously independent pneumatic circuits by introducing a cross-flow communication line that connects both sides of the suspension system. This allows air to flow between left and right sides, equalizing pressure while maintaining the independent height control capability of each leveling valve.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The cross-flow communication line acts as an intermediary element between the two independent pneumatic circuits. It mediates pressure differences by allowing air to transfer from the higher pressure side to the lower pressure side, thereby balancing the system without interfering with the independent control function.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Ease of operation

If leveling valves respond to dynamic weight shifts, then vehicle leveling is improved, but overcompensation occurs causing pressure differentials

Engineering Contradiction:

Improvevehicle leveling responseVSAvoidpressure equalization accuracy

Core Design Contradiction:

Ease of operationVSManufacturing precision

Solution Approach 1:

The cross-flow communication line provides continuous feedback between the two sides of the suspension system. When one side experiences pressure changes due to weight shifts, air automatically flows through the cross-flow line to equalize pressure, creating a self-correcting mechanism that prevents overcompensation.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The system strives to maintain equipotential pressure conditions between left and right sides through the cross-flow communication line. This passive equalization mechanism ensures that pressure differences are minimized, allowing the leveling valves to respond accurately to actual weight shifts without overcompensating.

Inventive Principle:

Principle #12Equipotentiality

3Adaptability or versatility

If pneumatic circuits operate independently, then height adjustment flexibility is improved, but pressure equilibrium cannot be maintained

Engineering Contradiction:

Improveindependent height adjustmentVSAvoidpressure equilibrium

Core Design Contradiction:

Adaptability or versatilityVSStability of the object's composition

Solution Approach 1:

The system maintains segmentation of the pneumatic circuits for independent height control, while simultaneously introducing a controlled connection through the cross-flow communication line. This allows each side to be adjusted independently when needed, while maintaining pressure equilibrium through the cross-flow path.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The cross-flow communication line serves multiple functions: it maintains pressure equilibrium between sides, provides a path for air transfer during leveling operations, and acts as a pressure equalization mechanism. This multi-functional element bridges the gap between independent operation and pressure balance.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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 solution effectively mitigates pressure differentials and maintains vehicle equilibrium, ensuring a stable and comfortable ride by allowing cross-flow communication between air springs when both leveling valves are neutral, thus preventing overcompensation.

Implementation Method 1

a cross-flow mechanism connecting the first pneumatic circuit with the second pneumatic circuit

Methodology Applied

Scientific EffectPneumatic communication:

Implementation Method 2

allowing for equalization of air pressure between sides of the vehicle

Methodology Applied

Scientific EffectPressure equalization:

Data Source

PatentUS10220665B2Symmetrically dynamic equalized volume and pressure air management system

Publication Date: 2019.03.05 BASE AIR MANAGEMENT LTD

AI summary

An air management system for a vehicle having a supply tank, a system controller integrated with the supply tank, a first pneumatic circuit pneumatically connected to the system controller, and a second pneumatic circuit pneumatically connected to the system controller. The system controller adjusts independently air pressure of the first pneumatic circuit and the second pneumatic circuit without establishing pneumatic communication between the first and second pneumatic circuits. The system controller establishes pneumatic communication between the first and second pneumatic circuits when the system controller is not adjusting independently the air pressure of the first pneumatic circuit and the second pneumatic circuit.