Hybrid Straddle Vehicle Radiator Layout for Space-Saving Cooling
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Solution Overview
Problem
The large occupied space by engine and motor radiators in hybrid straddle vehicles limits the arrangement of other parts and deteriorates cooling efficiency.
Innovation Solution
A hybrid straddle vehicle design with an internal combustion engine, electric motor, inverter, and radiators where the second radiator overlaps the first radiator and is located in front of it, optimizing their arrangement to reduce space and improve cooling efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the sizes of the radiators are reduced to reduce the occupied space, then the occupied space is reduced, but cooling efficiency deteriorates
Solution Approach 1:
The patent applies dimensional rearrangement by positioning the second radiator in front of the first radiator with overlapping projections when viewed from the vehicle front side. This spatial reconfiguration allows both radiators to occupy overlapping two-dimensional areas while maintaining separate three-dimensional volumes, effectively reducing the total occupied space without compromising the individual surface areas needed for cooling efficiency.
2Adaptability or versatility
If the occupied space of radiators is reduced, then the degree of freedom of arrangement of other parts is improved, but cooling efficiency deteriorates
Solution Approach 1:
By arranging the radiators in a front-rear relationship with overlapping projections rather than side-by-side placement, the patent frees up lateral space for other vehicle components while the overlapping configuration ensures both radiators maintain adequate surface area for effective cooling operations.
3Reliability
If the radiators are arranged side by side to maintain cooling efficiency, then cooling efficiency is maintained, but the occupied space increases
Solution Approach 1:
The patent transitions from a lateral (side-by-side) arrangement to a longitudinal (front-rear) arrangement with overlapping projections. This dimensional change allows the radiators to share the same lateral footprint while maintaining separate cooling surfaces, thereby reducing the total occupied space without sacrificing cooling efficiency.
Solution Approach 2:
The overlapping arrangement of the first and second radiators creates a nested spatial configuration where the radiators occupy overlapping areas when viewed from the front, similar to nested dolls. This allows one radiator to be positioned partially in front of the other, maximizing space utilization while preserving individual cooling surfaces.
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
Achieves both reduction of occupied space and enhancement of cooling efficiency by overlapping radiators and utilizing traveling wind to cool both effectively.
Implementation Method 1
a first radiator that cools the internal combustion engine
Implementation Method 2
a second radiator that cools at least one cooling target selected from the group consisting of the electric motor and the inverter
Implementation Method 3
utilizing traveling wind to cool both effectively
Data Source
AI summary
A hybrid straddle vehicle includes: an internal combustion engine; an electric motor that generates power to be transmitted to a driving wheel; an inverter that controls electric power to be supplied to the electric motor; a first radiator that cools the internal combustion engine; and a second radiator that cools at least one cooling target selected from the group consisting of the electric motor and the inverter, at least a part of the second radiator overlapping the first radiator when viewed from a vehicle front side, the second radiator being located in front of the first radiator.