Tank Ventilation Valve Blocking Element for Assembly Line Refueling
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Solution Overview
Problem
The existing tank ventilation valve systems in motor vehicles require external energization for assembly line refueling, leading to cumbersome and time-consuming processes, delaying production.
Innovation Solution
A tank ventilation valve with a blocking element that allows the valve to be open in a non-activated state, enabling refueling without external energization, utilizing a spring-actuated mechanism with an elastically restorable blocking member to maintain the valve in an intermediate position, allowing easy refueling during assembly line production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the tank ventilation valve is designed as normally closed (requiring energization to open), then the valve provides proper safety function during normal operation, but external energization is required during assembly line production causing delays
Solution Approach 1:
The patent inverts the normal valve behavior by making the valve normally open instead of normally closed. The blocking element is positioned to block the valve body in an intermediate position during delivery, allowing the valve to be open without energization. After first activation, the blocking element is deactivated and the valve returns to standard normally-closed operation, thus resolving the contradiction between safety function and assembly line productivity
Solution Approach 2:
The blocking element is pre-positioned in the delivery state to automatically open the valve without requiring external energization during assembly line production. This preliminary action eliminates the need for complex external control systems during manufacturing, thereby improving productivity while maintaining reliability through the blocking element's automatic deactivation after first use
2Object-affected harmful factors
If the valve is kept closed in non-activated state, then fuel vapor retention is ensured, but refueling during assembly line requires cumbersome external control
Solution Approach 1:
The blocking element automatically performs the function of opening the valve during assembly line refueling without requiring external control systems. The valve serves itself by using the blocking element's mechanical positioning to achieve the open state, eliminating cumbersome external energization requirements while maintaining fuel vapor retention through the normally-closed design after first activation
3Productivity
If a blocking element is added to enable automatic opening, then assembly line refueling is simplified, but device complexity increases
Solution Approach 1:
The blocking element is integrated into the existing valve structure, merging the new functionality with the existing electromagnet, valve body, and spring components. This integration minimizes additional complexity by using the existing mechanical and electromagnetic elements to achieve the automatic opening function during assembly line production
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
Facilitates quick and simple refueling of motor vehicles during assembly line production without the need for external energization, reducing production delays and simplifying the refueling process.
Implementation Method 1
at least one spring for urging the valve body in said one direction
Implementation Method 2
an actuator for moving the valve body in the other opposite direction against the force applied by the spring
Data Source
AI summary
The invention relates to a tank ventilation valve for a motor vehicle for selectively enabling or blocking a fluid flow, including a valve body (10) or tappet, which is linearly movable in one direction (R1) and another direction (R2) opposite to the one direction to selectively open or close a valve passage (D); at least one spring (20) for urging the valve body (10) in the one direction (R1), an actuator for moving the valve body (10) in the other opposite direction (R2) against the force applied by the spring (20), and a blocking element (50) for blocking the valve body (10) such that a movement of the valve body (10) in the one direction (R1) is blocked.