Intake Air Routing Device Partition Wall Design
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Solution Overview
Problem
Existing intake air routing devices for internal combustion engines face challenges in reducing intake interference while maintaining a compact size, as the need to increase air chamber capacity for each cylinder can lead to device enlargement.
Innovation Solution
An intake air routing device with a partition wall extending into the air chamber, intersecting the direction of intake passages, and positioned beyond the upstream ends of the passages to minimize interference, with specific dimensions and cutouts to optimize airflow distribution and reduce turbulence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the clean chambers are completely partitioned from each other by the partition wall, then intake interference is eliminated, but the size of the intake air routing device increases
Solution Approach 1:
The partition wall is segmented to extend only by a predetermined length in the air chamber, rather than completely partitioning the clean chambers. This partial segmentation is sufficient to eliminate intake interference while avoiding the need for full partitioning that would increase device size.
Solution Approach 2:
The partition wall extends beyond the upstream ends of the intake passages by a predetermined length, which is more than enough to prevent intake interference. This excessive action ensures complete elimination of interference while the controlled extension prevents excessive size increase.
2Quantity of substance
If the capacity of the clean chamber per cylinder is increased, then air volume of respective cylinders is secured, but the size of the intake air routing device increases
Solution Approach 1:
The partition wall extends in a direction intersecting with the direction where intake passages are lined up, utilizing the vertical dimension within the air chamber. This dimensional approach allows adequate air volume distribution without increasing the overall device footprint.
Data Source
AI summary
An intake air routing device for an engine having a plurality of cylinders, includes a pair of half case bodies forming an air chamber, an air filter arranged in the air chamber and configured to purify outside air received via an intake duct, and a plurality of intake passages extending from the air chamber. The plurality of intake passages are connected with respective intakes ports of the engine. A partition plate is disposed in the air chamber, and is formed separately from the case bodies. The partition plate is arranged in the air chamber such that it extends in the air chamber by a predetermined length in a direction intersecting with a direction where the intake passages are lined up so as to partition the intake passages from each other. Such intake air routing device reduces intake interference while maintaining a small size of the intake air routing device.