Telemetry-Based Regeneration Strategy for Diesel Particulate Filters
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Solution Overview
Problem
Active regeneration of diesel particulate filters (DPF) in diesel engines is less efficient and affects fuel economy and vehicle drivability due to the need for extra fuel to elevate exhaust gas temperature, while passive regeneration has limited impact on fuel economy and drivability.
Innovation Solution
A regeneration initiation and control system that uses telematic data and road characteristics to strategically time active regeneration, either postponing or advancing it based on expected fuel usage along different segments of a travel route, to minimize extra fuel consumption and potentially allow for passive regeneration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If active regeneration is performed to burn off trapped particulates in the DPF, then the DPF regeneration is achieved, but extra fuel is consumed and vehicle fuel economy is reduced
Solution Approach 1:
The system performs preliminary analysis of the travel route using telematic data and road characteristics to identify favorable segments for regeneration. By planning ahead and selecting optimal timing and location for active regeneration based on projected engine operating modes, the system minimizes extra fuel consumption while ensuring DPF regeneration is achieved.
Solution Approach 2:
The system dynamically adjusts the timing of active regeneration based on real-time telematic data, current DPF soot accumulation levels, and projected engine operating modes along different segments of the travel route. This dynamic optimization allows the system to select the most fuel-efficient opportunity for regeneration rather than using a fixed or purely threshold-based approach.
2Use of energy by moving object
If active regeneration is delayed to reach a more favorable road segment, then extra fuel consumption for regeneration is reduced, but the delay in regeneration may impact emission compliance or damage equipment
Solution Approach 1:
The system continuously monitors DPF soot accumulation levels and compares them against thresholds that would indicate potential emission compliance issues or equipment damage risks. This feedback mechanism allows the system to safely delay regeneration only when it is certain that the delay will not compromise emission compliance, while still achieving fuel savings by waiting for more favorable road segments.
Solution Approach 2:
The system performs preliminary assessment of whether delaying regeneration is safe by evaluating current soot accumulation levels and projected route conditions. This preliminary analysis ensures that delays are only implemented when they will not lead to emission compliance violations or equipment damage, allowing the system to safely optimize fuel consumption.
3Reliability
If active regeneration is initiated immediately when soot accumulation reaches a threshold, then emission compliance is maintained, but fuel economy is reduced due to suboptimal timing
Solution Approach 1:
The system performs preliminary analysis of the travel route using telematic data and road characteristics to identify favorable segments for regeneration before initiating active regeneration. By planning ahead and selecting optimal timing and location based on projected engine operating modes, the system maintains emission compliance while minimizing extra fuel consumption.
Solution Approach 2:
The system dynamically determines the optimal timing for active regeneration by evaluating current DPF soot accumulation levels against projected engine operating modes along different segments of the travel route. This dynamic approach allows the system to delay regeneration beyond immediate threshold triggers when favorable opportunities exist, optimizing fuel economy while maintaining emission compliance through continuous monitoring.
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 reduces the extra fuel used for active regeneration, potentially delaying it to favorable road segments where less fuel is consumed, thereby improving fuel economy and maintaining compliance with emission requirements.
Implementation Method 1
A known after-treatment system for exhaust gas passing through an exhaust system of a diesel engine comprises a diesel oxidation catalyst (DOC) associated with a diesel particulate filter (DPF). The combination of these two exhaust gas treatment devices promotes chemical reactions in exhaust gas
Implementation Method 2
The combination of these two exhaust gas treatment devices promotes chemical reactions in exhaust gas and traps diesel particulate matter (DPM) as exhaust flows through the exhaust system, thereby preventing significant amounts of pollutants such as hydrocarbons, carbon monoxide, soot, SOF (soluble organic fraction), and ash, from entering the atmosphere
Implementation Method 3
A typical regeneration initiation and control strategy controls air and fuel management systems in a manner that elevates engine exhaust gas temperature to one that is high enough to burn off trapped DPM. One way to elevate exhaust gas temperature is by post-injection of fuel.
Data Source
AI summary
A method for timing performance of a maintenance function, in particular the timing of regeneration of a diesel particulate filter (22) to conserve fuel as a motor vehicle (10) travels along a projected travel route. Certain road data about roads in a roadway system is processed to develop data for anticipating certain modes of vehicle operation during travel of the vehicle along the projected travel route. The data for anticipating certain modes of vehicle operation along the anticipated route of travel and data geographically tracking vehicle travel along the projected route are interactively used to control timing of performance of the maintenance function as the vehicle travels along the projected route.