Modular Drive System for Saddle-Type Vehicles
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Solution Overview
Problem
Existing pure electrically-driven saddle type vehicles face challenges such as limited vehicle range, increased weight and cost due to structural modifications required for additional drive sources, and the need for flexible design to adapt from internal combustion to hybrid or electric setups without compromising weight distribution and dynamic stability.
Innovation Solution
A drive system comprising a primary electrical motor mounted on a swing arm and a secondary electrical motor integrated into the rear wheel hub, powered by energy storage devices, allowing for conversion between hybrid and pure electric setups without structural changes, enhancing range, torque performance, and maintaining stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If both internal combustion engine and electric motor assembly are incorporated in hybrid two-wheeled vehicle, then vehicle can drive for long distances and on various terrains, but the system becomes bulky and more complex
Solution Approach 1:
The patent divides the drive system into separate modular components: the electric motor assembly is separated from the engine assembly, with the electric motor positioned on the swing arm and the engine in the engine mounting space. This segmentation allows independent optimization of each component and simplifies the overall system architecture while maintaining hybrid versatility.
Solution Approach 2:
The patent designs a universal mounting structure using the existing engine mounting space and swing arm that can accommodate both electric motor assemblies and engine assemblies. This multi-functional design allows the same vehicle platform to support different drive configurations (hybrid, pure electric, or engine-only) without requiring structural modifications.
2Duration of action of moving object
If additional drive sources are mounted on existing hybrid vehicle layout, then vehicle range and torque performance are improved, but structural modifications are required increasing weight and cost
Solution Approach 1:
The patent utilizes the pre-existing engine mounting space and swing arm structure in hybrid vehicles to mount the electric motor assembly. By preparing the mounting locations in advance during the vehicle design phase, the patent avoids the need for structural modifications when adding electric drive capability, thereby reducing weight and manufacturing cost.
Solution Approach 2:
The patent employs a removable and reconfigurable mounting structure that allows the electric motor assembly to be dynamically installed or removed from the swing arm. This dynamic configuration enables flexible adaptation between different drive modes without permanent structural changes, simplifying manufacturing and reducing vehicle weight.
3Adaptability or versatility
If primary electrical motor is mounted on swing arm, then conversion between hybrid and pure electric setups is simplified, but unsprung mass increases affecting ride comfort
Solution Approach 1:
The patent extracts the electric motor assembly from the traditional engine mounting space and relocates it to the swing arm. This extraction allows the same mounting structure to serve dual purposes in hybrid configurations while enabling easy conversion to pure electric setups by simply removing the engine, without requiring additional structural modifications.
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
The solution provides improved range, torque performance, and ease of conversion while maintaining weight distribution and stability, offering an economical and flexible solution for adapting between power sources within existing vehicle layouts.
Implementation Method 1
a first drive source being a primary electrical motor including at least one mounting portion integrally formed to at least a portion of the swing arm and configured for being removably mounted on at least a portion of the swing arm
Implementation Method 2
a second drive source being a secondary electrical motor being incorporated into a hub body of the rear wheel
Implementation Method 3
powered by energy storage devices
Data Source
AI summary
A saddle type two-wheeled vehicle includes: a frame extending along a vehicle longitudinal axis; a swing arm journaled to the frame and adapted to support a rear wheel; and a drive system including one or more drive sources configured to deliver a driving force to the rear wheel. The one or more drive sources include a first drive source and a second drive source, the first drive source comprises at least one mounting portion integrally formed to at least a portion of the first drive source, at least one mounting portion is configured for removably mounting the first drive source on at least a portion of the swing arm, and the second drive source is detachably mounted on the rear wheel.