Gasoline Particulate Filter Regeneration via Dedicated Air Line
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Solution Overview
Problem
Conventional gasoline particulate filter regeneration systems face issues with decreased catalyst purification efficiency and increased catalyst temperature due to rarefied air-fuel ratios and high temperature exhaust gases, which can lead to reduced performance and durability.
Innovation Solution
The system employs electric superchargers on intake lines to forcibly regenerate the gasoline particulate filter by directly supplying air to the filter through a regeneration air line, bypassing the combustion chamber, and using a controller to manage valve operations and differential pressure sensing for controlled regeneration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a high temperature exhaust gas with rarefied air-fuel ratio is introduced to regenerate the gasoline particulate filter, then the soot combustion is accelerated, but the catalyst purification efficiency is lowered and the catalyst temperature is unnecessarily raised
Solution Approach 1:
The system divides the air supply function into two separate paths: one for the combustion chamber (intake lines 20, 30) and another dedicated path for the gasoline particulate filter (regeneration air line 24). This segmentation allows independent control of air supply to each component, enabling regeneration without compromising catalyst performance.
Solution Approach 2:
The regeneration air line 24 acts as an intermediary pathway that directly connects the air supply source (via supercharger 35) to the gasoline particulate filter 70, bypassing the combustion chamber 11. This intermediary structure enables direct air supply for regeneration while preventing the harmful rarefied air-fuel ratio from reaching the catalyst apparatus 60.
2Productivity
If a high temperature exhaust gas with rarefied air-fuel ratio is introduced to regenerate the gasoline particulate filter, then the soot combustion is accelerated, but the catalyst temperature is unnecessarily raised affecting durability
Solution Approach 1:
The regeneration air line 24 serves as a dedicated intermediary channel that supplies air directly to the gasoline particulate filter 70 without passing through the combustion chamber 11. This prevents the high temperature rarefied exhaust gas from reaching the catalyst apparatus 60, thereby avoiding unnecessary temperature increases that would harm catalyst durability.
Solution Approach 2:
The system extracts the air supply function for regeneration from the main combustion air supply path. By using the regeneration air line 24 to tap air directly from the intake system (via supercharger 35) and deliver it exclusively to the filter, the harmful high temperature exhaust path is separated from the regeneration process.
3Productivity
If air is supplied to the combustion chamber to achieve theoretical air-fuel ratio, then complete combustion is improved, but the exhaust gas composition becomes rarefied causing combustion issues
Solution Approach 1:
The system segments the air supply into two independent systems: one for combustion (intake lines 20, 30 to combustion chamber 11) and another for regeneration (regeneration air line 24 to filter 70). This allows the combustion chamber to operate at optimal air-fuel ratios while the regeneration system independently supplies air to the filter without affecting exhaust composition.
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 approach prevents decreases in catalyst purification efficiency and reduces unnecessary temperature increases, enhancing catalyst durability and maintaining efficient exhaust gas reduction.
Implementation Method 1
a first electric supercharger and a second electric supercharger disposed on the first intake line and the second intake line, respectively
Implementation Method 2
a catalyst apparatus mounted on the exhaust pipe and purifying the exhaust gas
Implementation Method 3
the gasoline particulate filter mounted on a rear end portion of the catalyst apparatus of the exhaust pipe and collecting a particulate matter contained in the exhaust gas
Implementation Method 4
a bypass valve disposed on the bypass line; and a regeneration air line connecting the first intake line or the bypass line between the first electric supercharger, the first intake valve, and the bypass valve to the exhaust pipe between the catalyst apparatus and the gasoline particulate filter
Data Source
AI summary
A system of forcibly regenerating a gasoline particulate filter may include an exhaust pipe connected to the engine; a catalyst apparatus mounted on the exhaust pipe; first and second intake lines; first and second electric superchargers disposed on the first and second intake lines; a bypass line connecting a first point of the first supercharger and a second point of the second supercharger to each other; a first intake valve disposed at a downstream of the first point of the first intake line; a second intake valve disposed at an upstream of the second point of the second intake line; a bypass valve disposed on the bypass line; and a regeneration air line connecting the first intake line or the bypass line between the first electric supercharger, the first intake valve, and the bypass valve to the exhaust pipe between the catalyst apparatus and the gasoline particulate filter.