Reducing Agent Tank Heating System for SCR Aftertreatment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing systems for heating reducing agents in aftertreatment systems, such as those used in SCR systems, are inefficient and lack diagnostic capabilities, particularly in extreme cold temperatures where the reducing agent may freeze, leading to non-compliance with emission standards.
Innovation Solution
A system comprising a reducing agent containment device, a distribution device, heating components, temperature and pressure sensors, and a controller that activates heating components based on sensor inputs to maintain the reducing agent in a liquefied state, ensuring timely dosing and efficient operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If heating components are added to prevent freezing, then reliability is improved, but device complexity increases
Solution Approach 1:
The controller activates heating components before the reducing agent freezes by monitoring temperature parameters. This preliminary action ensures the reducing agent remains in liquid state and available for dosing, preventing freezing issues before they occur rather than reacting after freezing happens.
Solution Approach 2:
The system uses temperature sensors to continuously monitor the reducing agent temperature and feeds this information back to the controller. The controller adjusts heating component activation based on this feedback, creating a closed-loop control system that maintains reliable operation while optimizing energy usage.
2Reliability
If heating components are activated continuously, then reducing agent remains liquefied, but energy consumption increases
Solution Approach 1:
The heating components operate periodically rather than continuously. The controller activates heating only when temperature parameters indicate the reducing agent is approaching freezing conditions or when dosing is required. This periodic operation maintains reliability while significantly reducing energy consumption compared to continuous heating.
Solution Approach 2:
The system uses the engine's own cooling water as a heat carrier to warm the reducing agent tank. This self-service approach utilizes existing thermal energy from the engine operation to prevent freezing, reducing the need for separate energy-intensive heating systems.
3Loss of information
If heating system is added to prevent freezing, then diagnostic capabilities are improved, but device complexity increases
Solution Approach 1:
Temperature sensors provide continuous feedback on reducing agent temperature, and pressure sensors monitor system pressure conditions. This feedback enables the controller to detect freezing conditions, heating system performance, and system operational status, providing diagnostic capabilities that help identify issues before they affect reducing agent availability.
Solution Approach 2:
The system replaces complex mechanical diagnostic tools with electronic sensors and a controller that process electrical signals from temperature and pressure sensors. This substitution provides comprehensive diagnostic capabilities through software-based monitoring and control, reducing the need for separate mechanical diagnostic systems.
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
The system effectively prevents freezing of the reducing agent, ensures timely liquefaction post-engine startup, and provides diagnostic capabilities to maintain emission compliance, even in extreme cold conditions.
Implementation Method 1
at least one heating component associated with the reducing agent containment device
Implementation Method 2
a temperature sensor configured to determine a temperature of the reducing agent, the temperature sensor disposed at least partially within the reducing agent containment device
Implementation Method 3
a pressure sensor associated with the distribution device, the pressure sensor configured to determine a pressure characteristic of the system
Data Source
AI summary
A system for heating a reducing agent associated with a reducing agent distribution system. The system may include a reducing agent containment device, a distribution device connected to the reducing agent containment device, and at least one heating component associated with the reducing agent containment device. A temperature sensor may be configured to determine a temperature of the reducing agent and may be disposed at least partially within the reducing agent containment device. A pressure sensor may be associated with the distribution device and configured to determine a pressure characteristic of the system. A controller may be configured to receive input from the temperature sensor and the pressure sensor and configured to send input to the at least one heating component based on the input received from the temperature sensor and the pressure sensor.