Work Vehicle Reducing Agent Pipe Heating System
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Solution Overview
Problem
In work vehicles, the temperature of the reducing agent in exhaust treatment systems varies across different regions, making it difficult to uniformly adjust the temperature, leading to potential degradation or freezing of the reducing agent when using a single heating control system.
Innovation Solution
A work vehicle with a partitioned inner section featuring separate heating sections for different regions, each with its own temperature sensor and controller, allowing independent temperature adjustment of the reducing agent in the guiding pipes to prevent excessive heating or freezing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a single heating wire spans along the entire outer surface of the supply pipe, then the reducing agent can be heated uniformly, but the temperature cannot be appropriately adjusted in regions with different ambient temperatures
Solution Approach 1:
The single heating wire is divided into multiple heating wires, each corresponding to a specific region (engine room, radiator compartment, etc.). Each heating wire can be independently controlled based on the ambient temperature of its respective region, allowing appropriate temperature adjustment in each zone without affecting other regions.
Solution Approach 2:
Different heating wires are configured with different lengths and positions to match the specific temperature requirements of different regions. The heating wire in the engine room region has different characteristics compared to the heating wire in the radiator compartment, allowing each region to receive localized heating appropriate to its ambient conditions.
2Reliability
If the power supply to the heating wire is controlled based on the temperature inside the lower temperature region, then the reducing agent in that region is protected from freezing, but the reducing agent in the higher temperature region is excessively heated
Solution Approach 1:
The heating control system is segmented into multiple independent control circuits, each with its own temperature sensor and control logic. The control unit independently manages each heating wire based on real-time temperature feedback from its corresponding region, preventing both freezing in cold regions and excessive heating in warm regions.
Solution Approach 2:
Temperature sensors are installed in each region to provide real-time feedback to the control unit. The control unit adjusts the power supply to each heating wire based on this feedback, creating a closed-loop control system that maintains optimal temperature in each region and prevents both freezing and degradation.
3Reliability
If the power supply to the heating wire is controlled based on the temperature inside the higher temperature region, then the reducing agent in that region is protected from degradation, but the reducing agent in the lower temperature region freezes
Solution Approach 1:
The heating control system is divided into independent regional control units, each monitoring and controlling its own heating wire based on local temperature conditions. This segmentation ensures that the higher temperature region does not dictate the heating control for the lower temperature region, preventing freezing while avoiding excessive heating.
Solution Approach 2:
Each region has its own temperature monitoring and control characteristics tailored to its ambient conditions. The control unit applies different heating strategies to different regions based on their specific thermal environments, ensuring appropriate temperature maintenance in each zone.
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 precise temperature control of the reducing agent in different regions, preventing degradation or freezing, and maintaining optimal conditions for the exhaust treatment process.
Implementation Method 1
The heat insulating apparatus has a heating wire which is arranged to span along the entire outer surface of a supply pipe for the reducing agent
Data Source
AI summary
A work vehicle includes a vehicle body, a guiding pipe, a first heating section, and a second heating section. The vehicle body has a partition wall that partitions a space in an inner section into a first region and a second region. The guiding pipe is configured to guide a reducing agent. The guiding pipe has a first pipe section and a second pipe section. The first pipe section is positioned inside the first region. The second pipe section is positioned in the second region. The first heating section heats the first pipe section. The second heating section heats the second pipe section and adjusts the temperature independently from the first heating section.