Mower Radiator Vertical Positioning for Engine Cooling
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Solution Overview
Problem
Existing mower designs face challenges in efficiently cooling diesel engines and exhaust gas purification devices, leading to inadequate airflow and increased vehicle width, which affects performance and comfort.
Innovation Solution
The radiator is positioned to extend further upward between the transmission and diesel engine, with cooling air passing above the air cleaner and beside the diesel engine, creating an efficient airflow pathway that cools the engine and directs hot air away from the exhaust gas purification device, while a hood covers the radiator, air cleaner, and exhaust gas purification device to enhance airflow and reduce vehicle width.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the radiator is extended further upward to improve cooling efficiency, then the cooling performance of the diesel engine is improved, but the vehicle height increases
Solution Approach 1:
The radiator is repositioned to extend vertically upward between the transmission and diesel engine rather than horizontally, utilizing the vertical dimension to achieve better cooling airflow without increasing the vehicle's length or width. This dimensional reorientation allows cooling air to pass efficiently over the radiator while maintaining compact vehicle dimensions.
2Length of moving object
If the exhaust pipe is shortened to reduce vehicle length, then the vehicle compactness is improved, but the exhaust gas cooling efficiency deteriorates
Solution Approach 1:
The radiator serves as an intermediary cooling element that pre-cools the exhaust gas before it enters the exhaust pipe. By positioning the radiator to receive cooling air that will subsequently cool the exhaust pipe, the system achieves effective exhaust cooling with a shorter pipe length, resolving the contradiction between vehicle compactness and cooling efficiency.
3Productivity
If the radiator is repositioned to extend upward between transmission and engine, then the cooling airflow efficiency is improved, but the space arrangement complexity increases
Solution Approach 1:
The radiator is designed to serve multiple functions simultaneously: it cools the diesel engine directly, pre-cools exhaust gas, and guides cooling airflow through the engine compartment. By integrating these functions into a single repositioned component, the system achieves high cooling airflow efficiency without proportionally increasing overall system complexity.
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
This configuration improves the mower's performance by effectively cooling the diesel engine and exhaust gas purification device, increasing the clearance angle for navigating hills, and providing a comfortable driving experience by optimizing airflow.
Implementation Method 1
a radiator extending from an area between the transmission and the diesel engine so as to project further upward than the air cleaner through an area between the driver's seat and the air cleaner
Implementation Method 2
cooling air that has passed the radiator strikes the air filter or a front wall of the diesel engine
Implementation Method 3
an exhaust gas purification device arranged rearward of the diesel engine and provided with a filter collecting particulate matter contained in exhaust gas discharged from the diesel engine
Implementation Method 4
an exhaust pipe must be effectively cooled so as to reduce a temperature of the exhaust gas discharged to the exterior from the exhaust gas purification device
Data Source
AI summary
A mower includes: a driver's seat provided to a vehicle frame. A transmission is arranged at least partially below the driver's seat. An engine arranged rearward of the transmission such that a bottom end of the engine is positioned higher than a bottom end of the transmission. An exhaust gas purification device is arranged rearward of the engine. An air cleaner is arranged forward of the exhaust gas purification device and above the engine. A radiator extends from an area between the transmission and the engine so as to project further upward than the air cleaner through an area between the driver's seat and the air cleaner.