Air Intake Valve Recess Deposit Removal via Communication Passage
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Solution Overview
Problem
The existing air intake systems for internal combustion engines face issues with deposit accumulation in the valve accommodating recess, leading to potential valve body fixation or sticking, especially when the recess is formed on the vertically lower side of the air intake passage.
Innovation Solution
The air intake system incorporates a protruding line on the valve body that extends along the rotation shaft direction to expel deposits from the valve accommodating recess and a communication passage connecting the recess directly to the intake port, utilizing the engine's negative pressure to remove accumulated deposits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the valve accommodating recess is formed on the vertically lower side inner wall of the air intake passage, then the valve body can be fully accommodated in the recessed space, but deposits accumulate in the valve accommodating recess causing fixation or sticking of the valve body
Solution Approach 1:
The invention extracts the harmful deposits from the valve accommodating recess by introducing a communication passage that connects the recess to the intake port, allowing deposits to be removed through the airflow path. This separates the deposit removal function from the valve accommodation function, solving the accumulation problem while maintaining the recessed structure.
Solution Approach 2:
The communication passage acts as an intermediary channel between the valve accommodating recess and the intake port. It mediates the removal of deposits by allowing them to be carried away by the incoming air flow, thus preventing direct contact between deposits and the valve body while maintaining system functionality.
2Adaptability or versatility
If the valve body is positioned with offset from the rotation axis to change cross section area, then the cross section area of air intake passage can be changed, but the valve body requires a recessed accommodating space that promotes deposit accumulation
Solution Approach 1:
The invention extracts deposits from the problematic recessed environment by creating a direct communication path to the intake port. This allows the valve body to maintain its offset positioning for cross-section control while deposits are continuously removed through the communication passage, preventing accumulation in the recess.
Solution Approach 2:
The invention uses the pneumatic flow of intake air to remove deposits from the valve accommodating recess. The communication passage allows the air flow to carry deposits away from the recess, using the existing pneumatic system to solve the deposit accumulation problem without adding mechanical cleaning mechanisms.
3Volume of stationary object
If the valve accommodating recess is formed recessed on the inner wall surface, then space is utilized efficiently, but deposits generated from spitting or EGR accumulate in the recessed space
Solution Approach 1:
The invention extracts deposits from the space-efficient recessed structure by introducing a communication passage that connects the recess to the intake port. This allows the recess to maintain its space-saving design while deposits are continuously removed through the communication passage, preventing accumulation despite the recessed configuration.
Solution Approach 2:
The invention enables the air intake system to self-clean the valve accommodating recess using its own intake air flow. The communication passage allows the incoming air to automatically carry deposits out of the recess, providing a self-service cleaning function without requiring external maintenance or additional cleaning mechanisms.
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 prevents deposit accumulation and subsequent valve body fixation, ensuring smooth operation by continuously removing deposits through the suction force, thus maintaining system functionality and productivity.
Implementation Method 1
by opening and closing the valve body, it is possible to expel (sweep away) the deposits accumulated in the valve accommodating recess from the valve accommodating recess by the protruding line
Implementation Method 2
by a suction force by a negative pressure of the internal combustion engine from the intake port, the deposits in the valve accommodating recess is sucked into the intake port through the communication passage
Data Source
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AI summary
An air intake system for an internal combustion engine has a valve body that can open/close a passage cross section of a part of an air intake passage; a rotation shaft that extends to both sides of the valve body and supports rotation of the valve body; a valve accommodating recess that is formed on an inner wall surface of the air intake passage and accommodates therein the valve body; and a protruding line that is formed on an outer peripheral side surface of the valve body, which faces the valve accommodating recess, and extends along a a shaft direction of the rotation shaft. The air intake system further has a communication passage that directly connects the valve accommodating recess and an intake port of the internal combustion engine.