Exhaust Gas Cleaning Portion Sulfur Release Control
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Solution Overview
Problem
Exhaust gas control systems for internal combustion engines face challenges in efficiently managing sulfur compounds, leading to the generation of white smoke due to inadequate temperature-raising processes, which consume excessive fuel and reduce fuel efficiency.
Innovation Solution
Implementing a control method that estimates the accumulation of particulate components and sulfur compounds in the exhaust gas cleaning portion, using a sulfur release mode to gradually raise the temperature from 500°C to 550°C to release sulfur compounds, thereby reducing the frequency of temperature-raising processes and conserving energy sources like fuel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the frequency of temperature-raising process is increased to remove sulfur compounds, then white smoke generation is restrained, but fuel consumption increases and fuel efficiency deteriorates
Solution Approach 1:
The control device performs preliminary estimation of sulfur compound accumulation amounts before executing temperature-raising processes. By predicting when sulfur compounds will reach harmful accumulation levels, the system can schedule temperature-raising processes proactively rather than reactively, optimizing the timing to prevent white smoke while minimizing fuel consumption.
Solution Approach 2:
The control device continuously monitors exhaust gas conditions and sulfur compound accumulation, using this feedback to dynamically adjust the timing and duration of temperature-raising processes. The system modifies operational parameters based on real-time data to achieve the optimal balance between preventing white smoke and conserving fuel.
2Use of energy by moving object
If the frequency of temperature-raising process is decreased to save fuel, then fuel efficiency improves, but sulfur compounds accumulate and white smoke generates
Solution Approach 1:
By estimating sulfur compound accumulation in advance, the system can plan temperature-raising processes before harmful levels are reached, allowing for less frequent but still effective interventions that maintain fuel efficiency while preventing white smoke generation.
Solution Approach 2:
The control device optimizes temperature-raising process parameters (temperature profile, duration, intensity) based on estimated sulfur accumulation levels. By adjusting these parameters dynamically, the system achieves effective sulfur removal with minimal fuel consumption, balancing fuel efficiency and emission control.
3Reliability
If temperature-raising process is executed without accurate estimation, then sulfur compounds are removed, but excessive fuel is consumed
Solution Approach 1:
The patent replaces mechanical/empirical temperature-raising control with a computational estimation system. The control device uses algorithms to calculate sulfur compound accumulation based on engine operating conditions, fuel sulfur content, and exhaust gas flow, substituting physical trial-and-error with intelligent prediction to optimize fuel usage.
Solution Approach 2:
The system incorporates continuous feedback from exhaust gas sensors and engine monitoring to validate and refine sulfur accumulation estimates. This feedback loop ensures that temperature-raising processes are triggered only when necessary, preventing both under-treatment (white smoke) and over-treatment (excessive fuel consumption).
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 effectively restrains the generation of white smoke while saving fuel by optimizing the temperature-raising control, ensuring accurate release of sulfur compounds within a controlled temperature range, thus maintaining the functionality of the exhaust gas cleaning system.
Implementation Method 1
a filter, such as a diesel particulate filter (DPF), is provided in the exhaust system so that particulate components contained in exhaust gas are collected by the filter
Implementation Method 2
an oxidation catalytic converter (DOC) that causes the oxidation of hydrocarbons (HC) and carbon monoxide (CO) contained in exhaust gas
Implementation Method 3
an oxidation catalytic converter (DOC) that causes the oxidation of hydrocarbons (HC) and carbon monoxide (CO) contained in exhaust gas
Implementation Method 4
the DPF and the DOC are each heated to a predetermined temperature through post-injection of fuel or the like, so that the poisoning substances adsorbed to the DPF and the DOC are desorbed and released
Data Source
Figure 1
Figure 2
Figure 3A~3B
AI summary
An exhaust gas control apparatus for an internal combustion engine, includes an exhaust gas cleaning portion (11, 12) which is disposed in an exhaust system of the internal combustion engine mounted in a vehicle, and which collects particulate components contained in exhaust gas, and in which sulfur compounds contained in the exhaust gas are accumulated. The exhaust gas control apparatus includes control means (20) for estimating an amount of accumulation of the sulfur compounds in the exhaust gas cleaning portion (11, 12), and executing a temperature-raising control of raising a temperature of the exhaust gas cleamng portion (11, 12) into a temperature range in which the sulfur compounds are released and generation of white smoke of the sulfur compounds in atmosphere is restrained, when the estimated amount of accumulation of the sulfur compounds reaches a release-demanding amount.