Diagnosable Connector Device for Internal Combustion Engine Ventilation
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Solution Overview
Problem
Existing ventilation devices for internal combustion engines face challenges in diagnosing correct connection and preventing backflow, especially in supercharged engines, and require heating to prevent freezing, which complicates installation and logistics.
Innovation Solution
A connection device with a non-return valve and integrated heating, featuring a hole upstream of the non-return valve for diagnostic purposes and sealing mechanisms to ensure a gas-tight connection, allowing the interface to be integrated within the ventilation line, simplifying assembly and reducing complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a non-return valve is installed in the ventilation device to prevent backflow in supercharged engines, then backflow prevention is improved, but the diagnostic capability is worsened because the reduced pressure monitoring terminates at the valve
Solution Approach 1:
A diagnostic interface with at least one hole is introduced as an intermediary element between the non-return valve and the environment. This interface allows the diagnostic system to access reduced pressure information downstream of the non-return valve by providing a controlled communication path to the environment, thereby enabling complete space monitoring while maintaining backflow prevention functionality.
2Difficulty of detecting and measuring
If the non-return valve is located on the component which guides the supply air flow to enable complete diagnostic monitoring, then diagnostic capability is improved, but the heating requirement increases to prevent freezing at this location
Solution Approach 1:
The diagnostic interface with holes serves as an intermediary that enables diagnostic monitoring without requiring the non-return valve to be relocated to the supply air flow guide component. The interface provides the necessary communication path for pressure monitoring while keeping the valve in its optimal position within the ventilation line, thereby avoiding additional heating requirements.
3Device complexity
If the connection device is designed with integrated diagnostic interface and non-return valve in the ventilation line, then assembly complexity is reduced, but manufacturing precision requirements increase to ensure proper sealing and functionality
Solution Approach 1:
The diagnostic interface with holes and the non-return valve are merged into a single integrated connection device component. This combination reduces the total number of parts and assembly steps while concentrating manufacturing precision requirements into one component, which can be produced using standardized injection molding or similar processes that ensure consistent sealing surfaces and hole positioning.
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 enables reliable and efficient ventilation by ensuring correct connection verification and preventing backflow, simplifying assembly, reducing susceptibility to failure, and allowing for adaptable variants without affecting the supply air flow guide component, while maintaining diagnostic functionality and preventing freezing.
Implementation Method 1
the connection device has a non-return valve for preventing a flow from the supply air flow guide into the ventilation line
Implementation Method 2
it may be necessary to heat a ventilation device in order, for example, in winter during a cold start phase to prevent freezing, in particular of the connection device, to the component which guides the supply air flow
Data Source
AI summary
A connection device for connecting a ventilating line to an intake air flow guide of an internal combustion engine, wherein the connection device has a non-return valve for preventing a flow from the intake air flow guide into the ventilating line. The connection device has at least one hole which is arranged upstream of the non-return valve and connects an interior chamber of the connection device to a surrounding area of the connection device.