Hybrid Saddle-Riding Power Unit Layout for Frame Rigidity
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Solution Overview
Problem
Hybrid saddle-riding vehicles require increased vehicle body frame rigidity to accommodate both an engine and an electric motor, leading to weight gain due to larger frames or additional reinforcement, which complicates achieving sufficient structural integrity.
Innovation Solution
The vehicle body frame supports a power unit with the engine located between the front and rear wheels and the electric motor secured to the engine, using the electric motor as a rigid member to participate in load transmission, thereby maintaining rigidity without increasing the frame's size or adding reinforcement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the vehicle body frame is increased in size or reinforced to achieve higher rigidity, then the rigidity of the vehicle body frame is improved, but the weight of the vehicle body frame increases
Solution Approach 1:
The electric motor is designed to serve dual functions: as a power source and as a structural rigid member. By integrating the electric motor into the vehicle body frame structure, it participates in load transmission and enhances frame rigidity without requiring additional reinforcing components, thereby avoiding weight increase from extra structural elements
Solution Approach 2:
The electric motor serves itself by utilizing its own structural integrity to contribute to the vehicle body frame's rigidity. The motor housing and mounting structure are designed to actively participate in bearing and transmitting loads, allowing the motor to reinforce the frame structure without requiring separate reinforcing parts
Data Source
AI summary
A saddle-riding vehicle includes a power unit including: an engine which is located between front and rear wheels and produces drive power; and an electric motor which is secured to the engine and produces drive power. The power unit is supported by a vehicle body frame, at opposite sides of the electric motor in a longitudinal direction of the vehicle.