Diesel Particulate Filter Regeneration Threshold Adjustment
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Solution Overview
Problem
Existing diesel particulate filter (DPF) regeneration methods are based on fixed operating parameters and do not account for the current operating environment, leading to inefficiencies in determining when regeneration is necessary.
Innovation Solution
An exhaust system with sensors to detect particulate matter accumulation and ambient temperature, allowing a control module to adjust regeneration thresholds dynamically based on environmental conditions, ensuring timely and effective regeneration of the DPF.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If fixed operating parameters are used to determine regeneration timing, then the system is simple to operate, but the determination accuracy of regeneration timing is insufficient
Solution Approach 1:
The patent applies the dynamics principle by transitioning from fixed, static regeneration thresholds to dynamic thresholds that automatically adjust based on real-time ambient temperature conditions. The control module modifies the regeneration threshold according to the detected ambient temperature, making the system adaptive to changing environmental conditions while maintaining operational simplicity for the user.
Solution Approach 2:
The patent implements parameter changes by modifying the regeneration threshold parameter based on ambient temperature variations. The control module detects ambient temperature and accordingly adjusts the regeneration threshold parameter, allowing the system to account for environmental effects on particulate matter accumulation without requiring complex user intervention or system redesign.
2Adaptability or versatility
If fixed regeneration thresholds are used, then the control logic is simple, but the system cannot adapt to different operating environments
Solution Approach 1:
The patent changes the regeneration threshold parameter dynamically based on ambient temperature detection. This allows the system to adapt to different operating environments (cold vs. warm conditions) by adjusting the threshold accordingly, while the control logic remains relatively simple as it only requires adding temperature sensing and threshold adjustment functionality to the existing control module.
Solution Approach 2:
The patent implements feedback by using the ambient temperature sensor to continuously monitor environmental conditions and feeding this information back to the control module, which then adjusts the regeneration threshold accordingly. This closed-loop feedback mechanism enables the system to automatically adapt to changing operating environments without complex user intervention or manual calibration.
3Measurement precision
If ambient temperature compensation is implemented, then the regeneration timing accuracy is improved, but the device complexity increases
Solution Approach 1:
The patent adjusts the regeneration threshold parameter based on ambient temperature compensation. By modifying this single critical parameter according to temperature conditions, the system achieves improved regeneration timing accuracy without requiring fundamental changes to the overall system architecture or adding complex control algorithms.
Solution Approach 2:
The patent introduces an ambient temperature sensor as an intermediary element that bridges the gap between environmental conditions and the regeneration control system. This sensor provides the necessary temperature data to the control module, which then uses this information to adjust the regeneration threshold, effectively mediating the compensation process without requiring direct complex interaction between the environment and the control system.
Data Source
AI summary
An exhaust system for use with a diesel engine includes a diesel particulate filter configured to capture particulate matter exhausted from the diesel engine, a first sensor operable to detect a particulate matter accumulation level within the diesel particulate filter, and a second sensor operable to detect an ambient temperature of an environment surrounding the diesel particulate filter. The exhaust system also includes a control module electrically coupled to the first sensor, the second sensor, and the diesel particulate filter. The control module is operable to adjust a first regeneration threshold based on the detected ambient temperature. The control module is also operable to initiate regeneration of the diesel particulate filter when the detected particulate matter accumulation level reaches the first regeneration threshold.