Vortex Generator Air Inlet Duct Intake Efficiency

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Solution Overview

Problem

Existing intake systems for vehicles lack efficiency in air intake, as they do not effectively utilize wind flow to enhance air intake rates.

Innovation Solution

Incorporation of a vortex generator within the air inlet ducts of the intake system, which causes the intake air to rotate around the axis of the duct, increasing airflow rates and improving intake efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If a conventional air inlet duct is used without flow control structures, then the structure is simple and easy to manufacture, but the intake efficiency is insufficient

Engineering Contradiction:
Improveintake efficiencyVSAvoidstructure complexity
Core Design Contradiction:
ProductivityVSDevice complexity

Solution Approach 1:

Instead of trying to increase intake efficiency through complex duct shaping or active flow control systems, the invention inverts the approach by introducing a vortex generator that creates rotational flow. This rotational flow pattern naturally enhances the intake efficiency by preventing flow separation and maintaining higher velocities throughout the duct, achieving improved productivity without proportionally increasing device complexity

Inventive Principle:
Principle #13The other way round (Inversion)

Solution Approach 2:

The vortex generator changes the flow parameters by introducing rotation and turbulence into the air stream. This parameter change transforms the laminar or separated flow into a more energetic rotational flow, significantly improving intake efficiency. The relatively simple vortex generator structure achieves this parameter change without requiring complex multi-component systems

Inventive Principle:
Principle #35Parameter changes

2Quantity of substance

If the air inlet duct is extended to take more air, then the intake amount increases, but the airflow velocity and efficiency decrease

Engineering Contradiction:
Improveair intake amountVSAvoidairflow velocity
Core Design Contradiction:
Quantity of substanceVSSpeed

Solution Approach 1:

The vortex generator ensures continuous and stable rotational flow throughout the entire length of the extended air inlet duct. This continuous rotational action prevents flow separation and maintains high velocity even over long duct lengths, allowing the system to increase air intake amount without sacrificing airflow velocity. The vortex flow pattern sustains useful action throughout the extended duct rather than allowing energy loss

Inventive Principle:
Principle #20Continuity of useful action

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

The vortex generator enhances airflow rates within the intake system, leading to improved air intake efficiency and reduced noise, while maintaining a balanced and well-structured design.

Implementation Method 1

a vortex generator that causes the flow of the intake air inside the air inlet duct to rotate around the axis of the air inlet duct

Methodology Applied
Scientific EffectVortex flow: Vortex Generator

Data Source

PatentUS11952068B2Intake system
Publication Date: 2024.04.09 HONDA MOTOR CO LTD
  • US11952068B2 patent drawing
  • US11952068B2 patent drawing
  • US11952068B2 patent drawing

AI summary

Intake efficiency in an intake system is improved. An intake system takes air through an air inlet duct extending from an air cleaner case, and includes a vortex generator that causes the flow of the intake air inside the air inlet duct to rotate around an axis of the air inlet duct.