Valve Detection Chamber for Fuel Tank Venting Reliability
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Solution Overview
Problem
Existing internal combustion engine systems face challenges in reliably checking the connection between the valve and the fluid-carrying component with limited components and minimal installation space, particularly in preventing fuel tank ventilation gases from escaping during damage or loose connections.
Innovation Solution
The system incorporates a valve in the tank ventilation line with a detection space surrounded by the fluid-carrying component, utilizing inlet openings for pressurization via tank-venting gases, and a pressure sensor to monitor pressure, allowing for the detection of damage or loose connections by detecting pressure loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate pressure line is used to pressurize the detection chamber, then the detection of connection status becomes reliable, but the device complexity and installation space increase
Solution Approach 1:
The tank ventilation line serves dual functions: it ventilates the fuel tank and simultaneously serves as the pressure source for the detection chamber. The detection chamber is pressurized through the existing tank ventilation gases flowing through the valve, eliminating the need for separate pressure lines while maintaining detection reliability
Solution Approach 2:
The detection chamber is integrated into the existing tank ventilation system by using the same fluid-carrying component and valve structure. The detection chamber utilizes the flow path of tank ventilation gases, merging the detection function with the existing ventilation infrastructure to reduce overall system complexity
2Volume of stationary object
If the detection chamber is pressurized through existing tank ventilation gases, then the installation space is reduced, but the detection precision may be affected
Solution Approach 1:
The detection chamber is positioned at a specific location where tank ventilation gases flow through the valve, creating a localized pressurization zone. The pressure sensor is strategically placed within this chamber to accurately measure the pressure differential caused by connection status changes, ensuring detection precision despite using existing ventilation gases
Solution Approach 2:
The detection chamber acts as an intermediary space that amplifies the effect of connection status changes on pressure. By containing the pressure sensor within this chamber that is directly influenced by valve connection status, the system enhances measurement sensitivity while using the same tank ventilation gas flow
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 solution enables reliable detection of damage or loose connections between the valve and fluid-carrying component, preventing fuel tank gases from escaping into the environment, thereby ensuring proper operation and maintenance of the internal combustion engine.
Implementation Method 1
at least one pressure sensor for monitoring the pressure in the detection chamber
Data Source
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AI summary
The invention relates to an internal combustion engine with a fuel tank (24), a fluid-carrying component (16) and a tank vent line (26) connecting the fuel tank (24) and the fluid-carrying component (16) in a flow-conducting manner, wherein a valve (28) is arranged in the tank vent line (26), wherein a detection sub-area (62) of the valve (28) is surrounded by the fluid-carrying component (16) in such a way that a detection chamber (52) is formed around the detection sub-area (62), wherein the detection chamber (52) has at least one inlet opening (68) through which the detection chamber (52) can be pressurized and wherein at least one pressure sensor (42) is provided for monitoring the pressure in the detection chamber (52). The invention further relates to a method for monitoring a connection between a valve (28) in a tank venting line (26) and a fluid-carrying component (16).