Vehicle Gas Processing Device Backward Flow Prevention
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Solution Overview
Problem
Existing gas processing devices for vehicles do not effectively prevent backward flow from the intake pipe to the gas generation source, leading to inaccurate determination of gas pipe detachment.
Innovation Solution
A vehicle gas processing device with a check valve configured to allow gas flow from the gas pipe to the intake pipe while preventing flow in the reverse direction, and a determining unit that uses pressure changes and sensor data to detect detachment of the gas pipe.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a check valve is arranged at a midpoint of the gas pipe to prevent backward flow, then gas flow control is improved, but detachment detection capability deteriorates because air does not flow into the gas pipe when detachment occurs
Solution Approach 1:
The check valve is positioned at the connecting portion between the gas pipe and intake pipe, acting as an intermediary component. This positioning allows the check valve to prevent backward flow while enabling air to enter the gas pipe when detached, creating detectable pressure changes for accurate detachment detection.
2Measurement precision
If the check valve is fixed to the intake pipe at the connecting portion, then detachment detection is improved through pressure changes, but device complexity increases
Solution Approach 1:
The check valve is integrated directly onto the intake pipe at the connecting portion, merging two functions (backward flow prevention and detachment detection) into a single fixed component. This eliminates the need for separate movable valve mechanisms while maintaining both functions, thereby improving detachment detection without significantly increasing overall system complexity.
3Ease of operation
If the gas pipe is made flexible to allow movement, then ease of installation is improved, but determination of detachment becomes difficult
Solution Approach 1:
A determination unit continuously monitors pressure changes in the gas pipe and provides feedback about the detachment status. When the flexible gas pipe detaches, the resulting pressure change is detected and processed by the determination unit, which then identifies the detachment condition, thereby maintaining accurate detection despite the pipe's flexibility.
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
Prevents backward flow and accurately determines gas pipe detachment by monitoring pressure changes and sensor data, ensuring proper gas supply and engine operation.
Implementation Method 1
a check valve disposed between the intake pipe and the gas pipe, and configured to allow the gas to flow from the gas pipe toward the intake pipe and prohibit the gas to flow from the intake pipe toward the gas pipe
Implementation Method 2
a determining unit configured to determine that the gas pipe is detached from the check valve. The check valve may be fixed to the intake pipe, and the gas pipe may be detachably attached to the check valve
Data Source
AI summary
A vehicle gas processing device is configured to supply gas generated by a vehicle to an intake pipe of a combustion engine. The device may includes: a gas pipe configured to communicate a gas generation source to the intake pipe, the gas pipe having a flexible end at least at an intake pipe side of the gas pipe; a check valve disposed between the intake pipe and the gas pipe, and configured to allow the gas to flow from the gas pipe toward the intake pipe and prohibit the gas to flow from the intake pipe toward the gas pipe; and a determining unit configured to determine that the gas pipe is detached from the check valve. The check valve is fixed to the intake pipe, and the gas pipe is detachably attached to the check valve.