Exhaust Aftertreatment Aging Control Through Predictive Torque Limiting
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Solution Overview
Problem
Existing solutions for reducing exhaust gas pollutant emissions in vehicles often result in increased space, weight, material costs, and reduced driving performance, while also accelerating the aging of exhaust gas aftertreatment components due to individual driving behaviors.
Innovation Solution
A predictive procedure that uses an aging model to determine the current aging state of exhaust gas aftertreatment components, calculates a permissible moment based on operating parameters and characteristic values, and triggers a control command to adjust engine performance and reduce excessive current requirements, thereby slowing down the aging process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If oversized catalytic converters are installed to reduce pollutant emissions, then emission compliance is improved, but installation space requirements and weight increase
Solution Approach 1:
The patent changes the operational parameters of the exhaust aftertreatment system by dynamically adjusting the air-to-fuel ratio and controlling exhaust gas recirculation. This allows the existing component size to operate more effectively across different driving conditions, reducing the need for oversized components while maintaining emission compliance.
Solution Approach 2:
The system implements dynamic control of the exhaust aftertreatment process, continuously adapting to varying driving conditions and torque demands. This dynamic operation optimizes the performance of standard-sized components, eliminating the need for larger static components that would be required to handle peak emissions under all possible conditions.
2Reliability
If vehicle power output is limited to protect exhaust aftertreatment components, then component aging is reduced, but driving performance deteriorates
Solution Approach 1:
The system performs preliminary determination of component aging state and predictive assessment of aging progression before excessive damage occurs. By monitoring aging indicators in advance, the system can implement protective measures at optimal moments rather than requiring continuous power limitation, thus preserving both component life and driving performance.
Solution Approach 2:
The patent implements a feedback control system that continuously monitors the aging state of exhaust aftertreatment components and adjusts operating parameters accordingly. This closed-loop control allows the system to permit higher power output when components are in good condition while providing protection only when aging indicators suggest vulnerability, eliminating the need for continuous power limitation.
3Reliability
If components are replaced preventively to ensure emission compliance, then emission reliability is improved, but workshop visits and maintenance costs increase
Solution Approach 1:
The patent replaces the mechanical approach of preventive component replacement with a sensor-based monitoring and electronic control system. By using aging models and real-time data analysis, the system can predict component status and adjust operating parameters to extend component life, substituting physical replacement with intelligent control and significantly reducing maintenance frequency.
4Reliability
If temperature in the exhaust gas recirculation system is increased to protect components, then component aging is reduced, but fuel consumption increases
Solution Approach 1:
The system employs dynamic parameter changes in the exhaust gas recirculation process, adjusting temperature and flow rate based on real-time aging state assessment. Rather than maintaining constantly high temperatures to protect components, the system optimizes thermal parameters according to actual component condition and driving requirements, reducing unnecessary energy consumption while providing protection only when needed.
Data Source
Figure 1
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Figure 4a
AI summary
The present invention relates to a method for influencing an aging process of a component (1) of an exhaust aftertreatment system for a vehicle (200), comprising: - Predictive determination of an aging state (20) of the component (1) using an aging model (21); - Determining a characteristic value (23) from operating parameters derived from previous torque requirements; - Determining a permissible torque (25) taking into account the aging state (20) of the component (1) and the characteristic value (23) at which a limit value (27) of a conforming aging condition of the component (1) is undercut; - Comparison of a current torque requirement (29) with the permissible torque (25); - Output of a signal (30) when the current torque requirement (29) exceeds the permissible torque (25);and - triggering a control command (31) of a motor control unit (160), wherein the control command (31) is selected in deviation of the current instantaneous demand (29) from the permissible instantaneous demand (25). The invention further relates to a computer program (150) comprising commands which, when the program is executed by a computer, cause it to execute the method according to the invention, a control unit (160) configured to execute the method according to the invention, a drive motor (100) with the control unit (160) according to the invention, and a motor vehicle (200) with the drive motor (100) according to the invention.