Reversible DEF Pumping for Closed, Contamination-Free Transfer
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Solution Overview
Problem
Conventional systems for delivering diesel exhaust fluid (DEF) lack a practical and compliant method for use outside of garage settings, often resulting in contamination and failure to meet ISO 22241 standards.
Innovation Solution
A pumping system comprising a tank, a reversible motor-driven pump, and a four-way valve that allows for bidirectional fluid flow, enabling both filling and emptying of the system while maintaining a closed environment to prevent contamination, and includes a fluid delivery device that can transport DEF to and from external structures using interchangeable connection devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional DEF delivery methods are used outside garage settings, then DEF can be transported to vehicles, but contamination occurs and ISO 22241 compliance is not achieved
Solution Approach 1:
A portable DEF storage tank serves as an intermediary between the garage DEF source and the vehicle tank, enabling contamination-free transfer. The tank includes a closed pumping system with a pump, valve, and hose assembly that mediates the DEF transfer process, preventing contact with contaminants during outdoor delivery operations.
Solution Approach 2:
The patent replaces manual pouring or open-container transfer methods with a closed mechanical pumping system. The pump mechanically transfers DEF through sealed conduits and hoses, eliminating the need for open mechanical handling that causes contamination in conventional outdoor delivery methods.
2Reliability
If a closed pumping system is used to prevent contamination, then ISO 22241 compliance is achieved, but system complexity increases
Solution Approach 1:
The portable tank system is designed as a multi-functional unit that combines storage, pumping, valve control, and delivery capabilities in a single portable assembly. This universal design reduces overall system complexity by eliminating the need for separate garage storage, pumping, and delivery equipment.
Solution Approach 2:
The closed pumping system is segmented into modular components: a portable tank, a pump assembly, a valve mechanism, and a hose assembly with connection devices. This segmentation allows each component to be optimized independently while maintaining the closed system integrity, making the complex system manageable and maintainable.
3Ease of operation
If DEF is delivered using open containers or jugs, then delivery is simple, but contamination occurs rendering DEF useless
Solution Approach 1:
The closed hose assembly with connection devices acts as an intermediary that maintains fluid purity during transfer. The connection devices include filters and sealed interfaces that mediate between the portable tank and vehicle tank, preventing contamination while maintaining simple operation similar to conventional methods.
4Adaptability or versatility
If a portable DEF storage system is implemented, then outdoor delivery capability is achieved, but device complexity increases
Solution Approach 1:
The portable tank system serves multiple functions: storage of DEF, pumping operation, valve control, and delivery to various locations. This multi-functionality reduces the need for multiple separate systems, making the increased complexity worthwhile by enabling outdoor delivery capability.
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 system effectively delivers DEF to and from vehicles or tanks while ensuring a closed, contamination-free process, meeting ISO 22241 standards and preventing fluid freezing issues, thus enhancing the efficiency and reliability of DEF delivery.
Implementation Method 1
a four-way valve that allows for bidirectional fluid flow, enabling both filling and emptying of the system
Implementation Method 2
this arrangement provides means to generally completely empty the pump and any conduits or connecting members used to transport the fluid and avoid problems that would be caused by freezing of the remaining fluid
Data Source
AI summary
Provided is a mobile fluid pumping system which may include a reservoir and, a pump actuated by a reversible motor. In the first configuration, the reversible motor is operated in a first direction causing a fluid to flow in a first direction and operated in a second direction causing fluid to flow in a second direction thereby providing means to fill a reservoir and then transfer fluid from the reservoir to a vessel or tank. The fluid delivery device provides means to substantially evacuate fluid from any connectors in the system thereby avoiding problems otherwise associated with remaining fluid that may freeze. Further, the device is designed to provide a closed load and unload system meeting ISO 022241.