Partitioned Intake Manifold for Vehicle Tumble Flow Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing variable tumble systems experience flow loss of intake air due to the mismatch in width-directional length between the tumble plate and intake port, and assembly tolerances, which reduces tumble flow efficiency.
Innovation Solution
An automotive intake system with a separate structure featuring a partitioned intake manifold having a first and second chamber, where intake air flows through distinct paths to prevent flow loss, with a tumble adaptor and bypass duct system that adjusts air flow to concentrate air at the lower portion of the intake port for increased tumble flow during charging, and distributes air uniformly across the intake port during non-charging conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a tumble plate is inserted into the intake port to guide intake air to the upper portion, then tumble flow is increased, but a gap is generated between the tumble plate and intake port due to width-directional length mismatch, causing flow loss of intake air
Solution Approach 1:
The intake manifold is divided into a first chamber and a second chamber separated by a partition wall. The first chamber receives charged air and directs it to the lower portion of the intake port, while the second chamber receives fresh air through a bypass path and directs it to the upper portion of the intake port. This segmentation eliminates the need for a tumble plate and prevents flow loss by providing separate flow paths for different air sources.
Solution Approach 2:
A bypass duct with bypass channels is introduced as an intermediary structure to transport fresh air from the bypass path to the second chamber, which then directs air to the upper portion of the intake port. This intermediary pathway ensures smooth air flow without gaps or mismatches that would cause flow loss.
2Productivity
If a variable valve is closed and rotated to align with the tumble plate, then tumble flow is increased in the combustion chamber, but intake resistance increases and intake air flow is restricted
Solution Approach 1:
By segmenting the air supply into two separate chambers with distinct paths, the system can independently control air flow to different portions of the intake port without requiring a variable valve to rotate or block the flow path. The first chamber supplies air to the lower portion while the second chamber supplies air to the upper portion, maintaining open flow paths.
Solution Approach 2:
Instead of controlling tumble by rotating a variable valve in the horizontal plane (blocking the path), the system uses vertical dimensionality by directing air to different vertical portions (upper and lower) of the intake port through separate chambers, achieving tumble control without restricting overall air flow.
3Device complexity
If an integrated variable valve and tumble plate structure is used, then assembly is simplified, but assembly tolerances generate steps that cause flow loss of intake air
Solution Approach 1:
The system separates the air intake function into two independent chambers (first chamber for charged air, second chamber for fresh air) with separate flow paths. This segmentation eliminates the need for integrated variable valve and tumble plate structures, thereby eliminating steps caused by assembly tolerances between different components.
Solution Approach 2:
The tumble plate component is completely removed from the system. Instead of using a tumble plate that requires precise alignment and assembly with the intake port, the system extracts this function and replaces it with a bypass duct and partitioned chamber system that naturally directs air flow without requiring tight tolerances.
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 system enhances tumble flow by concentrating intake air at the lower portion of the intake port during charging, improving combustion efficiency in lean burn operations, while maintaining high flow rates during non-charging conditions, and reduces manufacturing costs by eliminating the need for VCM valve systems.
Implementation Method 1
charged air flows into the first chamber through a charging path and fresh air flows into the second chamber through a bypass path detouring the charging path
Implementation Method 2
increase tumble flow by preventing a flow loss of intake air flowing into an intake port under a tumble-increasing condition
Data Source
AI summary
An intake system for a vehicle may include an intake manifold having an internal space divided into a first chamber and a second chamber by a partition wall, in which intake air flows into the first chamber through a charging path and is then discharged to a portion of an intake port connected to the intake manifold; and intake air flows into the second chamber through a bypass path bypassing charger and is then discharged to another portion of the intake port.