Single Pump Reductant Insertion Assembly with Series Metering Manifolds
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Solution Overview
Problem
Conventional reductant insertion assemblies for large internal combustion engine aftertreatment systems require multiple pumps, increasing manufacturing and maintenance costs, power requirements, and space usage due to the need for dedicated pumps at multiple locations.
Innovation Solution
A reductant insertion assembly that uses a single pump to supply reductant to multiple locations through a series of metering assemblies, maintaining consistent pressure across all points, thereby reducing the number of pumps needed and enhancing design flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple pumps are used to deliver reductant to multiple locations, then reductant delivery reliability is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent combines multiple pump functions into a single pump by configuring it with multiple outlets, each connected to different metering assemblies at different locations in the aftertreatment system. This single pump with multiple outlets replaces what would traditionally require multiple separate pumps, thereby reducing device complexity and manufacturing cost while maintaining the ability to deliver reductant reliably to multiple locations.
Solution Approach 2:
The single pump is designed to perform multiple functions by delivering reductant to multiple different locations simultaneously through its multiple outlets. Each outlet can be independently controlled to deliver reductant to specific metering assemblies, allowing the single pump to replace multiple dedicated pumps while maintaining system reliability.
2Stress or pressure
If multiple pumps are used to supply reductant to multiple locations, then reductant pressure control is improved, but power requirements increase
Solution Approach 1:
The patent merges multiple pump functions into a single pump with multiple outlets, each capable of delivering reductant at controlled pressures to different locations. This consolidation reduces the total power requirements compared to operating multiple separate pumps, while maintaining effective pressure control through independent flow control valves at each outlet.
3Manufacturing precision
If multiple pumps are used for reductant insertion, then reductant delivery precision is improved, but manufacturing and maintenance cost increase
Solution Approach 1:
The patent combines multiple pump functions into a single pump with multiple outlets, reducing the number of components that need to be manufactured and maintained. The single pump design with integrated multiple outlets and independent flow control valves lowers manufacturing complexity and maintenance costs while preserving precise reductant delivery control through the flow control valves at each outlet.
4Volume of moving object
If multiple pumps are used to deliver reductant to multiple locations, then space utilization is improved, but device complexity increases
Solution Approach 1:
The patent merges multiple pump functions into a single compact pump assembly with multiple outlets, significantly reducing the space required compared to housing multiple separate pumps. The single pump design with integrated outlets and flow control valves simplifies the overall assembly while maintaining the capability to deliver reductant to multiple locations, thereby improving space utilization without excessively increasing device complexity.
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 decreases manufacturing and maintenance costs, reduces power requirements, and optimizes space usage while maintaining efficient reductant delivery to multiple locations within the aftertreatment system.
Implementation Method 1
The pump is configured to pump the reductant to the first metering assembly, and to the second metering assembly via the first metering assembly, such that a first reductant pressure in the first metering assembly is equal to a second reductant pressure in the second metering assembly.
Data Source
AI summary
A reductant insertion assembly for inserting a reductant into an aftertreatment system includes: a pump assembly comprising a pump that includes a pump outlet; a first metering assembly fluidly coupled to the pump outlet, the first metering assembly comprising a first metering manifold; and a second metering assembly fluidly coupled in series with the pump, the second metering assembly being a separate structure from the first metering assembly and comprising a second metering manifold removably coupled to the first metering manifold. The pump is configured to pump the reductant to the first metering assembly, and to the second metering assembly via the first metering assembly.