Electric Saddle Vehicle Radiator Layout Against Frame Interference

Resolve Bottlenecks,
Find Innovative Solutions
Generate Solutions

Solution Overview

Problem

The right and left radiators in straddled electric vehicles interfere with other components due to their forward positioning, leading to potential damage and interference issues.

Innovation Solution

The radiators are positioned such that at least a part overlaps the reinforcing frame, with the right radiator disposed rightward and the left radiator disposed leftward, preventing interference with other components and enhancing rigidity through a reinforcing frame connected to the main and down frames.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If the right radiator and left radiator are disposed forward of the reinforcing frame, then the radiators can be positioned to cool the power unit effectively, but the radiators interfere with other components such as the front fork

Engineering Contradiction:
Improvecooling effectivenessVSAvoidcomponent interference
Core Design Contradiction:
TemperatureVSObject-affected harmful factors

Solution Approach 1:

The patent transitions from a two-dimensional positioning problem (front/back placement) to a three-dimensional solution by allowing the radiators to overlap the reinforcing frame in side view while maintaining proper spacing in front view. This spatial reconfiguration enables the radiators to be positioned forward for effective cooling while the reinforcing frame provides structural support and prevents interference with front components like the front fork.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

2Temperature

If the radiators are positioned forward for effective cooling, then cooling performance improves, but the radiators become vulnerable to damage from external factors

Engineering Contradiction:
Improvecooling performanceVSAvoidradiator durability
Core Design Contradiction:
TemperatureVSReliability

Solution Approach 1:

The reinforcing frame is positioned to overlap the radiators in side view, creating a protective barrier before external objects can reach the radiators. This preliminary protective structure cushions the radiators against potential damage from stones, debris, or other external factors while allowing the radiators to maintain their forward position for optimal cooling performance.

Inventive Principle:
Principle #11Beforehand cushioning (Prior cushioning)

3Object-affected harmful factors

If the radiators are disposed rightward and leftward of the reinforcing frame, then interference with front components is reduced, but the radiators may still conflict with other vehicle components

Engineering Contradiction:
Improveinterference reductionVSAvoidcomponent arrangement
Core Design Contradiction:
Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The patent merges the functional role of the reinforcing frame from purely structural support to also include radiator positioning and protection. By having the reinforcing frame overlap the radiators in side view, the same structural component serves dual purposes: maintaining frame rigidity and preventing radiator interference with other components, thereby simplifying the overall component arrangement.

Inventive Principle:
Principle #5Merging (Combining)

Data Source

PatentEP4671099A1Electric saddle-type vehicle
Publication Date: 2025.12.31 YAMAHA MOTOR CO LTD
  • EP4671099A1 patent drawingFigure 1
  • EP4671099A1 patent drawingFigure 2
  • EP4671099A1 patent drawingFigure 3

AI summary

In a straddled electric vehicle 1, a main frame 5 extends rearward from a head pipe 4. The down frame 6 extends downward from the head pipe 4. The down frame 6 is disposed below the main frame 5 in vehicle side view. A reinforcing frame 12 is connected to the main frame 5 and the down frame 6. At least a part of a battery 41 overlaps the main frame 5 in vehicle side view. A right radiator 61R is disposed rightward of the reinforcing frame 12. A left radiator 61L is disposed leftward of the reinforcing frame 12. At least a part of the right radiator 61R overlaps the reinforcing frame 12 in vehicle side view. At least a part of the left radiator 61L overlaps the reinforcing frame 12 in vehicle side view.