Tire Roller Engine Room Layout for Visibility and Water Tank Capacity
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Solution Overview
Problem
Conventional compaction machines face a reduction in water tank capacity due to the taller heat exchanger being positioned at the front of the engine room, obstructing driver visibility and requiring a lower mounting position, which limits the water tank's capacity.
Innovation Solution
The compaction machine rearranges the engine room layout with the heat exchanger positioned at the rear, cooling fan in front, prime mover in front of the cooling fan, and hydraulic pump in front of the prime mover, with a diagonally inclined cover to ensure driver visibility and expand the water tank capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the heat exchanger is positioned at the front of the engine room, then the driver's visibility towards the front diagonal lower side is ensured, but the water tank capacity is reduced
Solution Approach 1:
The patent inverts the conventional arrangement by positioning the heat exchanger at the rear of the engine room instead of the front. This reversal allows the water tank to be placed at the front below the engine room, maximizing its capacity while the inclined cover maintains driver visibility. The cooling fan remains in front to draw air through the heat exchanger at the rear, achieving the same cooling function without obstructing the driver's view.
Solution Approach 2:
The patent utilizes the vertical dimension by forming the cover to incline diagonally downward from the rear to the front of the engine room. This inclined configuration creates sufficient vertical clearance for the driver's visibility while allowing the water tank to occupy the maximum horizontal space below the engine room. The diagonal inclination resolves the spatial conflict between visibility requirements and tank capacity.
2Volume of stationary object
If the heat exchanger is positioned at the rear of the engine room, then the water tank capacity is increased, but the cooling air flow direction must be changed
Solution Approach 1:
The patent inverts the conventional cooling air flow direction by having air flow from the rear to the front of the engine room, opposite to the typical front-to-rear direction. The cooling fan positioned in front draws air in from the front, and this air flows backward through the heat exchanger at the rear. This inverted arrangement allows the heat exchanger to be positioned at the rear for maximum water tank capacity while maintaining effective cooling through the reversed air flow path.
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 maintains driver visibility while increasing the water tank capacity and improving operational efficiency by allowing separate resin tanks and reducing noise and heat exposure near the driver.
Implementation Method 1
a cooling fan that generates cooling air flowing from the rear to the front of the equipment installation room
Implementation Method 2
a heat exchanger positioned at the rear of the equipment installation room
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
In the tire roller 1A, the heat exchanger 100 is positioned in front of the driver's seat 8 and at the rear of the engine room 70 (equipment installation room), the cooling fan 26f is positioned in front of the heat exchanger 100, the engine 22 (prime mover) is positioned in front of the cooling fan 26f, the hydraulic pump 25 is positioned in front of the engine 22, and the upper surface 72 as a cover is formed to incline diagonally downward from the rear to the front of the engine room 70. This configuration allows the cover (upper surface 72) of the engine room 70 to be inclined diagonally downward from the rear to the front without lowering the mounting position of the heat exchanger 100. As a result, it is possible to suppress the reduction in capacity of the water tank 30 positioned below the engine room 70 and ensure visibility toward the front diagonal lower side of the vehicle body 2.