EGR Gas Distributor Segmented Inflow for Condensate Drainage

Resolve Bottlenecks,
Find Innovative Solutions
Generate Solutions

Solution Overview

Problem

Conventional EGR gas distributors face challenges in facilitating the natural downward flow of condensed water in the gas inflow passage without increasing the size of the distributor, due to limited mounting space in vehicles.

Innovation Solution

The EGR gas distributor is designed with a gas inflow passage that branches off in multiple stages, featuring passage cross-sections perpendicular to the central axis, with an uppermost vertex and lowermost vertex, allowing for easy natural downward flow of condensed water without increasing the size of the distributor.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the gas inflow passage is inclined to facilitate natural downward flow of condensed water, then condensed water drainage is improved, but the size of the EGR gas distributor increases

Engineering Contradiction:
Improvecondensed water drainageVSAvoidsize of EGR gas distributor
Core Design Contradiction:
ReliabilityVSVolume of stationary object

Solution Approach 1:

The gas inflow passage is divided into multiple passage parts (first, second, third passage parts) with different orientations. The first passage part extends in a first direction, the second passage part extends in a second direction different from the first, and the third passage part extends in a third direction different from the second. This segmentation allows each segment to contribute to condensed water drainage in different directions, achieving effective drainage without requiring a single large inclined structure.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

Instead of using a single inclined passage, the invention uses multiple passage parts extending in different directions (first direction, second direction, third direction). This multi-dimensional arrangement allows condensed water to drain effectively through gravitational force acting in different orientations, eliminating the need for a large single inclined passage.

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

2Volume of stationary object

If the gas inflow passage is made compact to fit limited mounting space, then mounting space utilization is improved, but condensed water drainage performance deteriorates

Engineering Contradiction:
Improvemounting spaceVSAvoidcondensed water drainage
Core Design Contradiction:
Volume of stationary objectVSReliability

Solution Approach 1:

The gas inflow passage is segmented into multiple parts with different extensions directions. This allows the passage to be compact in overall volume while each segment maintains appropriate orientation for condensed water drainage, achieving both space efficiency and drainage performance.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

Different passage parts have different local qualities in terms of extension direction. The first passage part extends in a first direction, the second in a second direction, and the third in a third direction. Each local segment is optimized for its specific function, allowing the overall structure to be compact while maintaining drainage capability.

Inventive Principle:
Principle #3Local quality

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 effectively directs condensed water to flow downward, enhancing drainage performance and reducing the generation of condensed water on the inner walls, while maintaining the compact size of the EGR gas distributor.

Implementation Method 1

allowing for easy natural downward flow of condensed water

Methodology Applied
Scientific EffectGravity: Gravitation

Data Source

PatentUS11306690B2EGR gas distributor
Publication Date: 2022.04.19 AISAN IND CO LTD
  • US11306690B2 patent drawing
  • US11306690B2 patent drawing
  • US11306690B2 patent drawing

AI summary

An EGR gas distributor for distributing EGR gas to branch pipes of an intake manifold includes a plurality of gas distribution passages arranged side by side for the branch pipes, a gas inflow passage and a gas chamber to deliver the EGR gas to each of the gas distribution passages. The gas inflow passage includes two, first and second, gas passage parts branched in a single stage. When the EGR gas distributor is mounted on the intake manifold, a passage cross-section of each gas passage part perpendicular to a central axis has an uppermost vertex and a lowermost vertex. The passage cross-sections of the gas passage parts are sized such that their lengths in a vertical direction are gradually longer from an upstream side of the first gas passage part to a downstream side of the second gas passage part.