Tractor Exhaust Cleaner Controller Casing for Heat and Moisture Protection
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Solution Overview
Problem
Existing tractors face challenges in effectively reducing a large amount of toxic materials in exhaust gas from the engine, with controllers being susceptible to heat and moisture, leading to inefficient operation of the exhaust gas cleaning system.
Innovation Solution
The tractor is equipped with an exhaust gas cleaner controlled by a casing-protected controller, positioned laterally outward to receive engine cooling air, and a hood holding frame that doubles as a casing holder, along with a casing lid design that prevents dust and water ingress, ensuring effective operation of the exhaust gas cleaning system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the controller is disposed in the engine room to control the exhaust gas cleaner, then the control function is integrated, but the controller is exposed to heat and moisture from the engine, reducing its reliability
Solution Approach 1:
The controller is separated from the engine room environment by placing it inside a dedicated casing. This segmentation isolates the sensitive electronic component from harmful thermal and moisture conditions while maintaining its control function.
Solution Approach 2:
The casing acts as an intermediary protective structure between the controller and the harsh engine room environment. It provides thermal and moisture isolation, allowing the controller to operate reliably without direct exposure to engine heat and exhaust gases.
2Reliability
If the controller is protected from heat and moisture, then its operational reliability improves, but additional protective structures increase device complexity
Solution Approach 1:
The hood holding frame is designed to serve dual functions: it supports the engine hood and simultaneously holds the casing. This multi-functionality reduces the need for additional dedicated mounting structures, minimizing overall device complexity while providing necessary protection.
Solution Approach 2:
The casing is integrated with the existing hood holding frame structure rather than being a completely separate assembly. This merging of functions reduces the number of independent components and simplifies the overall protective structure.
3Reliability
If the casing is securely attached to the hood holding frame, then the controller is well-protected, but maintenance access becomes difficult
Solution Approach 1:
The casing lid is designed to be detachable, transforming the casing from a completely fixed structure to a dynamically accessible one. This allows the controller to be protected during operation while being easily accessible during maintenance by simply removing the lid.
Solution Approach 2:
The casing is divided into a removable lid portion and a fixed base portion. This segmentation allows the protective function to be maintained while providing easy access to the controller for maintenance activities.
4Object-generated harmful factors
If the exhaust gas cleaner processes more exhaust gas to reduce toxic materials, then emission reduction effectiveness improves, but the system requires more robust control capabilities
Solution Approach 1:
The controller monitors and adjusts the operation of exhaust gas cleaning devices based on engine conditions and exhaust gas characteristics. This feedback mechanism enables effective toxic material reduction while maintaining manageable control complexity through automated regulation.
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 reduces toxic materials in exhaust gas by maintaining the controller's functionality, preventing heat and moisture exposure, and facilitating easy maintenance, thus enhancing the efficiency and reliability of the exhaust gas cleaning process.
Implementation Method 1
a rotary fan positioned forward of the engine to supply engine cooling air
Implementation Method 2
the rotary fan supplies cooling air flowing toward a back portion of the engine room. The cooling air comes into contact with the casing. This helps prevent the casing from being heated due to heat from the engine or in the engine room
Data Source
AI summary
A tractor includes an engine room defined by an engine hood, an engine in the engine room, an exhaust gas cleaner in the engine room to clean exhaust gas from the engine, a controller in the engine room and configured or programmed to clean the exhaust gas, and a casing containing the controller.