Catalytic Converter Activation for Dynamic Engine Power Control
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Solution Overview
Problem
Existing methods for controlling emissions in internal combustion engines result in power limitations that are inflexible and do not account for the actual conversion capacity of the catalytic converter, leading to reduced driving performance and comfort, especially during cold starts and extreme driving maneuvers, and fail to meet stringent emissions regulations.
Innovation Solution
A method that adjusts the power output of the internal combustion engine based on the activated partial volume of the catalytic converter, considering its conversion capacity, using temperature and space velocity models to ensure efficient pollutant conversion and compliance with emissions thresholds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the power of the internal combustion engine is limited to meet emissions threshold values, then emissions compliance is improved, but driving performance and power availability deteriorate
Solution Approach 1:
The patent applies dynamics by transitioning from static power limitation to dynamic power adjustment. The control device continuously adapts the maximum available power based on real-time catalytic converter activation status, exhaust gas temperature, and space velocity conditions. This allows the engine to operate at full power when emissions are properly converted while limiting power only when necessary to prevent emissions overrun.
Solution Approach 2:
The patent implements feedback mechanisms by monitoring exhaust gas temperature, space velocity, and catalytic converter conversion efficiency in real-time. The control device uses this feedback to continuously adjust the maximum available power setting, creating a closed-loop control system that balances emissions compliance with driving performance requirements.
2Power
If the internal combustion engine operates under full load after cold start, then driving performance is improved, but catalytic converter overheating and emissions conversion reliability deteriorate
Solution Approach 1:
The patent applies preliminary action by implementing a warm-up phase strategy where the engine operates with limited power initially to allow the catalytic converter to reach optimal operating temperature. The control device monitors temperature and space velocity conditions, and only after the converter is sufficiently activated does it permit full power operation, preventing emissions conversion failures before they occur.
Solution Approach 2:
The patent changes operating parameters dynamically by adjusting maximum available power based on exhaust gas temperature and space velocity conditions. The control device modifies engine operating parameters such as torque limits and RPM restrictions according to the thermal state of the catalytic converter, enabling reliable emissions conversion while maintaining driving performance.
3Object-affected harmful factors
If the catalytic converter volume is increased to improve emissions conversion capacity, then emissions compliance is improved, but device complexity and system cost deteriorate
Solution Approach 1:
The patent changes operational parameters (exhaust gas temperature, space velocity, air-to-fuel ratio) to optimize the performance of the existing catalytic converter volume. By controlling the warm-up phase and monitoring space velocity conditions, the system maximizes the conversion efficiency of the installed converter without requiring additional volume or complex multi-stage converter systems.
Solution Approach 2:
The patent replaces mechanical/systemic solutions (larger catalytic converter volume) with control-based solutions (dynamic power adjustment, temperature monitoring, space velocity control). The control device uses sensor data and algorithms to manage emissions conversion, substituting physical system expansion with intelligent control strategies.
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
Enables early release of high power while reliably meeting emissions standards, enhancing driving performance and comfort by dynamically adjusting power according to the catalytic converter's active volume, thus overcoming inflexible power limitations.
Implementation Method 1
exhaust gas from the internal combustion engine is fed to at least one catalytic converter arranged in an exhaust system of the motor vehicle
Implementation Method 2
the internal combustion engine has been idling to a sufficient extent during the cold start, the exhaust system and in particular the at least one catalytic converter arranged in the exhaust system of the motor vehicle can be heated during this idling phase
Data Source
AI summary
A method is disclosed for operating an internal combustion engine of a motor vehicle in which exhaust gas from the internal combustion engine is fed to at least one catalytic converter in an emission control system of the motor vehicle. A power that the internal combustion engine can supply is adjusted via a control device of the motor vehicle as a function of an emission of at least one pollutant contained in the exhaust gas into an environment of the motor vehicle. A quantity of a volumetric percentage of the at least one catalytic converter causing the at least one pollutant to be converted is ascertained, and the power supplied by the internal combustion engine is adjusted as a function of said quantity of the volumetric percentage.