Engine Control Unit Cooling via Head Pipe Airflow
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Solution Overview
Problem
The increased heat generation by the engine control unit in straddled vehicles due to high functionality, which is trapped in the space between the side box and the storage box, leading to reduced ride comfort and potential heat radiation inefficiencies in scooter-type vehicles.
Innovation Solution
The engine control unit is positioned in front of the head pipe with a wide heat radiating surface arranged orthogonally to its thickness direction, utilizing air flow through an opened portion in the head pipe storage portion to enhance heat dissipation, and is designed to overlap with the head pipe to maximize air flow striking the heat radiating surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the engine control unit is disposed between the side box and the storage box, then the space utilization is improved, but the heat radiating performance deteriorates due to trapped heat
Solution Approach 1:
The engine control unit is extracted from the enclosed space between the side box and storage box, and relocated to the head pipe storage portion where heat can be dissipated through the opened portion. This extraction resolves the heat trapping problem while maintaining compact space utilization.
Solution Approach 2:
The opened portion in the head pipe storage portion, which could potentially expose components, is converted into a beneficial heat dissipation pathway. Air flow through this opened portion actively cools the engine control unit, transforming a potential vulnerability into a thermal management advantage.
2Temperature
If the engine control unit is positioned to maximize heat radiation, then the heat radiating performance is improved, but the space utilization in the head pipe storage portion becomes constrained
Solution Approach 1:
The engine control unit is oriented with its heat radiating surface extending in a direction intersecting with the head pipe axis, utilizing the three-dimensional space efficiently. This dimensional orientation allows heat radiation toward the opened portion while fitting within the constrained head pipe storage portion volume.
Solution Approach 2:
The engine control unit is designed with a wide heat radiating surface specifically oriented toward the opened portion, concentrating heat dissipation capability in the direction where air flow is available, while maintaining a compact form factor that fits the local space constraints of the head pipe storage portion.
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 significantly improves the heat radiating performance of the engine control unit by effectively utilizing the small inner space of the head pipe storage portion, ensuring efficient cooling and maintaining ride comfort by reducing heat-related issues.
Implementation Method 1
utilizing air flow through an opened portion in the head pipe storage portion to enhance heat dissipation
Implementation Method 2
a wide heat radiating surface arranged orthogonally to its thickness direction
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A head pipe storage portion of an straddled vehicle includes an opened portion (322). The opened portion (322) is provided below a head pipe (11). A steering device (3) extends outside from an inner space through the opened portion (322). An engine control unit (44) is disposed in front of the head pipe (11) in the inner space of the head pipe storage portion, and overlaps at least part of the head pipe (11) as seen in a vehicle front view. The engine control unit (44) includes a main heat radiating surface and is dimensioned to be greater in both a length direction thereof and a width direction thereof than in a thickness direction thereof. The main heat radiating surface extends in both the length direction and the width direction as seen in the thickness direction. The main heat radiating surface extends in a direction intersecting with a direction of an axis (Ax1) of the head pipe (11) as seen in a vehicle side view.