Intake Manifold Anti-icing Guide Member for Blow-by Gas
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Solution Overview
Problem
The existing intake manifold systems are prone to clogging due to the freezing of blow-by gases from the engine crankcase, which interact with fresh air at the gas inlet, causing a temperature difference that leads to ice formation and blockage.
Innovation Solution
An anti-icing device is introduced, featuring a guide member within the plenum chamber that directs blow-by gases away from the fresh air inlet, combined with thermal insulation and a drain aperture to prevent direct contact and reduce heat transfer, thereby preventing freezing at the gas inlet.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the blow-by gas flows directly into the plenum chamber through the gas inlet, then the gas inlet structure is simple, but the moisture in the blow-by gas freezes due to temperature difference with fresh air, causing clogging
Solution Approach 1:
A guide member is introduced as an intermediary component between the gas inlet and the plenum chamber. This guide member redirects the blow-by gas flow path, causing it to enter the plenum chamber at a location away from the fresh air inlet, thereby preventing direct contact between the cold blow-by gas and the fresh air that would cause freezing and clogging.
Solution Approach 2:
The guide member utilizes spatial dimensionality within the plenum chamber to separate the flow paths of blow-by gas and fresh air. By introducing a three-dimensional flow redirection structure, the patent creates distinct entry zones for the two gas streams, preventing their interaction at the inlet region where temperature difference would cause freezing.
2Productivity
If the blow-by gas contacts fresh air near the gas inlet, then the mixing occurs early, but freezing is caused by temperature difference, narrowing or clogging the gas inlet
Solution Approach 1:
The guide member serves as a mediator that controls the interaction between blow-by gas and fresh air. It delays their contact until downstream in the plenum chamber, allowing the blow-by gas to enter and mix in a region insulated from the cold fresh air inlet, thus preventing freezing while still achieving effective mixing.
Solution Approach 2:
The guide member performs a preliminary action by pre-positioning the blow-by gas flow path to enter the plenum chamber away from the fresh air inlet. This preliminary flow arrangement prevents the harmful freezing effect before it can occur, while still allowing subsequent mixing to take place downstream.
3Reliability
If thermal insulation material is added around the guide member, then heat transfer from fresh air is blocked, but device complexity increases
Solution Approach 1:
Thermal insulation material is applied locally only where needed - specifically around the guide member and in critical regions where cold fresh air contact with blow-by gas is most likely to cause freezing. This localized insulation approach provides anti-icing effectiveness while minimizing the overall complexity and material usage compared to full-system insulation.
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 solution effectively moves the mixing location of blow-by gases and fresh air downstream, reducing the likelihood of ice formation and clogging, ensuring uninterrupted airflow through the intake manifold.
Implementation Method 1
a guide member within the plenum chamber that directs blow-by gases away from the fresh air inlet
Implementation Method 2
combined with thermal insulation and a drain aperture to prevent direct contact and reduce heat transfer
Implementation Method 3
combined with thermal insulation and a drain aperture to prevent direct contact and reduce heat transfer
Data Source
AI summary
The present disclosure relates to an anti-icing device for an intake manifold for preventing freezing of a blow-by gas flowing from a crankcase of an engine into a plenum chamber of an intake manifold through a gas inlet, and includes a guide member provided inside the plenum chamber, and for inducing the blow-by gas discharged from the gas inlet toward the inside of the plenum chamber that is away from the fresh air inlet, and an engaging means for fixing the guide member to the intake manifold, thus preventing the freezing from occurring and the inlet from clogging by the freezing.