Integrated Pump Filter Module for Urea Supply Purging
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing systems for heavy goods vehicles to reduce NOx emissions require separate and large components for urea supply, metering, and filtration, which are prone to ice formation and liquid re-filling issues during freezing, leading to potential damage.
Innovation Solution
A compact pump/filter module integrated into a common housing with a non-return device, where the filter surrounds the pump and the non-return device is part of the housing, preventing liquid re-entry after purging and allowing efficient urea supply and purging while maintaining a gas-filled state to prevent ice formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate pump, filter and non-return device are used, then each component can be optimized independently, but the overall system size becomes large and occupies more space
Solution Approach 1:
The patent combines the pump, filter, and non-return device into a single integrated module with a common housing. The pump is positioned centrally with the filter surrounding it, and the non-return device integrated into the housing structure. This merging reduces the overall system volume while maintaining the functional independence and optimization capabilities of each component.
Solution Approach 2:
The filter is designed to surround the pump, creating a nested configuration where one component is positioned within the spatial envelope of another. The non-return device is integrated into the housing that encompasses both the pump and filter. This nesting arrangement maximizes space utilization and minimizes the overall system footprint.
2Object-affected harmful factors
If the system is purged to prevent ice formation, then damage from freezing is prevented, but liquid may re-enter the purged components when the pump stops
Solution Approach 1:
The non-return device is pre-positioned in the housing to automatically prevent liquid re-entry when the pump stops after purging. The bell siphon mechanism is designed to activate automatically when liquid level rises, creating a preliminary protective action that prevents the harmful effect of liquid re-entry without requiring additional control systems.
Solution Approach 2:
The bell siphon acts as an intermediary mechanism between the liquid in the tank and the purged components. It allows liquid to be present in the tank while automatically preventing it from re-entering the pump, filter, and supply line through its siphon action, thus mediating between the need for liquid storage and the need to keep supply components dry.
3Reliability
If a bell siphon is used to prevent liquid re-entry, then liquid transfer from tank is blocked, but the system complexity increases with separate components
Solution Approach 1:
The bell siphon, pump, filter, and non-return device are merged into a single integrated module. The common housing encompasses all these components, creating a unified assembly that reduces system complexity compared to having separate components. The integration maintains the bell siphon's effectiveness in preventing liquid re-entry while simplifying installation and system architecture.
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 compact module effectively prevents liquid re-entry into purged components, ensuring the system remains functional during freezing conditions and reducing the risk of damage, while maintaining efficient NOx reduction capabilities.
Implementation Method 1
a filter (3) surrounding said pump (2)
Data Source
AI summary
A supply system for a liquid includes a liquid tank, a supply line, a pump, a filter, and a device that makes it possible to purge the line, pump, and filter. The supply system further includes a non-return device preventing liquid from entering into these elements once they have been purged. In this system, the pump, filter and non-return device are combined in a compact module. The filter at least partly surrounds the pump. The non-return device is an integral part of a common housing that surrounds the filter and at least one part of the pump.