Coolant Recovery Portion for Reducing Agent Injection Module
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing engine cooling systems for reducing agent injection modules in diesel engines face issues with thermal damage and nozzle blockages due to high exhaust gas temperatures when the engine stops, as the coolant circulation stops, leading to inefficient cooling and potential deformation or blockages.
Innovation Solution
An engine cooling system with a coolant circulation line that includes a coolant supply line, a coolant recovery line, and a coolant recovery portion positioned higher than the reducing agent injection module, which allows for vapor discharge and vapor storage, ensuring continuous cooling by replenishing coolant in liquid state when the pump stops, preventing thermal damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the coolant pump stops operating when the engine stops, then energy consumption is reduced, but the reducing agent injection module is exposed to high temperature exhaust gas causing thermal damage and nozzle blockage
Solution Approach 1:
The coolant recovery portion is positioned higher than the reducing agent injection module along the gravitational direction, creating a height difference that enables automatic coolant replenishment through gravity-driven flow. This preliminary positioning ensures that liquid coolant can continuously refill the cooling channel even when the pump stops, preventing thermal damage before it occurs
Solution Approach 2:
The system uses the weight of accumulated liquid coolant in the coolant recovery portion to automatically replenish coolant in the cooling channel without requiring pump operation. The gravity-driven self-service mechanism maintains cooling function during engine stop periods, reducing energy consumption while preventing thermal damage
2Reliability
If the coolant circulation line is designed with a coolant recovery portion positioned higher than the reducing agent injection module, then coolant replenishment is improved, but device complexity increases
Solution Approach 1:
The coolant recovery portion is positioned at a higher elevation to create a gravitational potential difference. This height difference establishes a natural equipotential flow path where liquid coolant automatically flows from the higher recovery portion to the lower reducing agent injection module, simplifying the circulation line design by eliminating the need for additional pumping mechanisms during idle periods
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 thermal damage to the reducing agent injection module by circulating coolant and replenishing it with liquid coolant when the pump stops, maintaining efficient cooling and reducing the risk of nozzle blockages.
Implementation Method 1
a coolant recovery portion (70) installed higher than the reducing agent injection module (60) along a gravitational direction to store the coolant discharged through the coolant recovery line
Implementation Method 2
a coolant pump (80) configured to supply the coolant to the module cooling channel (62)
Implementation Method 3
a vapor discharge outlet (72) which is connected to an upper portion of the coolant recovery portion (70) to discharge the coolant in vapor state in the coolant recovery portion (70)
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A cooling device for a reducing agent injection module, includes a reducing agent injection module installed in an exhaust pipe to inject a reducing agent into the exhaust pipe and having a module cooling channel therein through which a coolant flows to cool the reducing agent injection module, a coolant pump configured to supply the coolant to the module cooling channel, a coolant circulation line including a coolant supply line and a coolant recovery line to connect the coolant pump and the module cooling channel, and a coolant recovery portion installed in the coolant recovery line to store the coolant flowing through the reducing agent injection module and positioned higher than the reducing agent injection module along a gravitational direction. The coolant recovery portion includes a vapor discharge outlet which is connected to an upper portion of the coolant recovery portion to discharge the coolant in vapor state in the coolant recovery portion.