Spring-Loaded Dosing Valves for Ice-Induced Backflow Protection
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Solution Overview
Problem
Existing fluid-conveying devices for internal combustion engines face challenges in protecting components like filters and pumps from high pressures, particularly due to ice formation in dosing lines, which can cause backflow and damage.
Innovation Solution
A fluid-conveying device equipped with a spring-preloaded first valve that allows fluid flow from an outlet line to a dosing line only when a minimum pressure is reached, preventing backflow and protecting upstream components. A second valve allows fluid to flow back into a bypass when freezing occurs, reducing pressure and preventing damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If electrically controllable valves are used to control fluid flow direction, then the fluid flow can be controlled, but the device complexity and installation space requirement increase
Solution Approach 1:
The invention extracts the electrical control system from the valve mechanism, retaining only the mechanically actuated valve body while removing the need for electrical actuators, controllers, and signal lines. This simplifies the overall system while maintaining flow control functionality through pressure-driven operation.
Solution Approach 2:
The valve system operates autonomously using the fluid's own pressure to actuate the valves. The spring-preloaded check valve and pressure-actuated valve respond automatically to pressure changes in the dosing line, eliminating the need for external control systems and achieving self-regulating flow control.
2Ease of operation
If electrically controllable valves are used to control fluid flow direction, then the fluid flow can be controlled, but the installation space requirement increases
Solution Approach 1:
The invention merges the valve body with the connection plug, integrating the flow control function directly into the existing connection structure. This consolidation eliminates separate valve housings and electrical components, significantly reducing the installation space requirement while maintaining full flow control capability.
3Reliability
If valves are used to prevent backflow from dosing line, then components are protected against high pressure, but the device complexity increases
Solution Approach 1:
The invention employs simple, mechanically actuated valve designs that can be easily replaced if needed, rather than complex electronic control systems. The spring-preloaded check valve and pressure-actuated valve are straightforward mechanical components that provide reliable protection without requiring sophisticated control electronics.
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 effectively prevents damage from ice formation by ensuring one-way fluid flow and allowing fluid to drain or bypass back to the tank, thus minimizing pressure on the conveying device and its components.
Implementation Method 1
at least one first valve (4) which is preloaded by a spring and is configured to prevent a fluid flow from the dosing line to the outlet line
Implementation Method 2
configured to permit the fluid flow from the outlet line to the dosing line if a predefined minimum pressure p1 is reached on that side of the first valve which faces toward the outlet opening
Implementation Method 3
the at least one first valve (4) is preloaded by a spring and is configured to prevent a fluid flow from the dosing line to the outlet line
Data Source
AI summary
A fluid-conveying device for conveying a fluid, such as in particular water, from a tank. The fluid can be conveyed along a dosing line to an injection point by a pump, wherein the dosing line is attached at a pressure side of the pump by a connection plug which is attached to an outlet line. The fluid-conveying device has at least one first valve, which is preloaded by a spring and which is configured to prevent a fluid flow from the dosing line to the outlet line and which is furthermore configured to permit the fluid flow from the outlet line to the dosing line if a predefined minimum pressure p1 is reached on that side of the first valve which faces toward the outlet opening.