Tractor Reducing Agent Pump Layout Outside the Body Frame
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Solution Overview
Problem
Conventional tractors face challenges in mounting a large reducing agent pump due to limited space in the engine room, necessitating a larger engine compartment.
Innovation Solution
Positioning the reducing agent pump laterally outward of the body frame and incorporating a pump cover to secure a large placement space, with the entrance step acting as a guard and the pump cover protecting the pump, allowing for efficient maintenance through a dividable cover configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the reducing agent pump is mounted in the engine room, then it is protected by the engine room structure, but the available space is insufficient for a large pump
Solution Approach 1:
The reducing agent pump is relocated from the vertical space of the engine room to the lateral space outside the body frame. This dimensional transition allows the pump to be positioned in the lateral direction rather than consuming engine room volume, enabling a larger pump size without increasing engine room area.
2Volume of moving object
If the reducing agent pump is positioned laterally outward of the body frame, then a large pump can be accommodated, but the pump becomes exposed and requires additional protection
Solution Approach 1:
The pump cover serves multiple functions: it protects the laterally positioned pump from external factors (stones, debris), provides structural support, and maintains aesthetic appearance. By giving the cover multiple functions, the design achieves protection without adding separate protective structures that would increase complexity.
3Device complexity
If the pump cover is made as a single piece, then the structure is simple, but maintenance requires removing the entire pump
Solution Approach 1:
The pump cover is divided into multiple segments (first pump cover and second pump cover) that can be independently removed. This segmentation allows maintenance personnel to access the pump by removing only the necessary cover portion rather than the entire cover assembly, significantly improving maintenance accessibility while keeping each segment structurally simple.
4Object-affected harmful factors
If the entrance step is positioned laterally outward of the pump, then it serves as a guard for the pump, but the step must be structurally integrated
Solution Approach 1:
The entrance step is designed to serve dual functions: providing access to the driver section and acting as a protective guard for the laterally positioned pump. By making the step structurally integrated with the pump support structure, the design achieves protection without adding separate guard structures, reducing overall complexity.
Data Source
AI summary
A tractor includes a reducing agent pump laterally outward of a body frame to supply a reducing agent to an exhaust gas cleaner, and a pump cover covering the reducing agent pump.