Air Cleaner Baffle Part for Uniform Dust Distribution

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Solution Overview

Problem

Air cleaners for internal combustion engines often suffer from inhomogeneous dust distribution on the filter element due to non-uniform air flow guidance, leading to localized contamination and reduced filter efficiency.

Innovation Solution

Incorporating a baffle part with a widened section that projects towards the filter element, featuring a guide section and a widened section with increased width further from the intake port, to uniformly diffuse and direct air flow onto the filter element, ensuring homogeneous dust collection.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a diffusion plate is used to divide and guide air flow, then air can be directed to the filter element, but inhomogeneous dust distribution occurs on the filter element

Engineering Contradiction:
Improveair flow guidanceVSAvoiddust distribution uniformity
Core Design Contradiction:
Ease of operationVSManufacturing precision

Solution Approach 1:

The diffusion plate is divided into multiple segments (first diffusion plate and second diffusion plate) that are positioned at different locations and angles. Each segment handles a specific portion of the air flow, ensuring more uniform distribution across the filter element surface and preventing localized dust accumulation.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

Different portions of the diffusion structure have different geometries and orientations. The first diffusion plate has a specific angle relative to the air flow direction, while the second diffusion plate has a different angle, allowing each region to optimize air guidance for its local area of the filter element.

Inventive Principle:
Principle #3Local quality

2Volume of moving object

If the distance between the filter element and the diffusion plate is short, then the air cleaner can be more compact, but air flow becomes non-uniform and dust distribution becomes inhomogeneous

Engineering Contradiction:
Improveair cleaner sizeVSAvoiddust distribution uniformity
Core Design Contradiction:
Volume of moving objectVSManufacturing precision

Solution Approach 1:

Instead of increasing the distance between the diffusion plate and filter element in the primary flow direction (which would increase size), the invention uses multiple diffusion plates arranged in different spatial dimensions and orientations. This multi-dimensional approach achieves uniform air distribution without increasing the overall compactness of the air cleaner.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

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 configuration ensures uniform air flow distribution across the filter element, preventing localized dust collection and extending the filter's lifespan by reducing pressure imbalances and dust leakage, while allowing for a more compact design.

Implementation Method 1

at least one baffle part that projects toward the filter element from an inner surface of the case and diffuses the air introduced into the first space and introduces the air to the filter element

Methodology Applied
Scientific EffectAir flow diffusion: Diffusion

Implementation Method 2

a filter element capable of partitioning the internal space into a first space and a second space

Methodology Applied
Scientific EffectPhysical filtration: Filter (physical)

Data Source

PatentUS11525426B2Air cleaner
Publication Date: 2022.12.13 HONDA MOTOR CO LTD
  • US11525426B2 patent drawing
  • US11525426B2 patent drawing
  • US11525426B2 patent drawing

AI summary

An air cleaner includes a case having an internal space, a filter element capable of partitioning the internal space into a first space and a second space, an intake port that introduces an air into the first space therethrough, an exhaust port that discharges an air from the second space, and at least one baffle part projecting toward the filter element from an inner surface of the case. The baffle part diffuses the air introduced into the first space and introduces the air to the filter element. The baffle part includes a widened baffle part. The widened baffle part includes a guide section extending along an extending surface of the filter element and a widened section larger in width than the guide section.