Electric Motorcycle Control Unit Cornering Mode Shift
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Solution Overview
Problem
Electric motorcycles experience a change in driving power during cornering due to mode shifts based on state values, which can worsen the driver's feeling and control, especially when the vehicle body is banked.
Innovation Solution
An electric motorcycle with a control unit that detects cornering and suppresses changes in motor output during mode shifts, inhibiting mode changes when cornering to maintain a stable driving experience by using a driving command detecting device, state value detecting device, and cornering determiner unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the electric motorcycle shifts driving mode based on state value changes (temperature, voltage, etc.), then the motor and battery are protected from damage, but the driving power changes abruptly during cornering, worsening the driver's feeling and control
Solution Approach 1:
The control unit dynamically adjusts the mode shift strategy based on vehicle operating conditions. When cornering is detected through banking angle sensors, the system suppresses mode shifts even if state values trigger normal mode change conditions. This dynamic adaptation allows the system to prioritize driving stability during critical maneuvers while maintaining protection functionality during normal operation.
Solution Approach 2:
The cornering detection mechanism acts as an intermediary between the state value monitoring system and the mode shift execution. By introducing this intermediate layer that detects banking angle and suppresses mode shifts during cornering, the system mediates between the need for component protection and the need for stable driving experience, preventing direct mode shifts that would cause abrupt power changes.
2Ease of operation
If the control unit suppresses mode shifts during detected cornering, then the driving power remains stable and driving feeling is improved, but the motor or battery may be exposed to damaging conditions if state values exceed safe ranges
Solution Approach 1:
The suppression of mode shifts during cornering is not absolute but dynamic and conditional. The control unit continuously monitors state values even when cornering is detected, and will allow mode shifts if critical thresholds are exceeded. This dynamic balance ensures driving stability is prioritized during normal cornering while maintaining safety margins for component protection when necessary.
Data Source
AI summary
An electric motorcycle includes a driving command detecting device, a state value detecting device, an electric motor driving a drive wheel, a control unit for executing a non-normal mode causing output of the electric motor in a non-normal mode to differ from the output of the electric motor in a normal mode, the control unit configured to shift the electric motorcycle from one of the normal or non-normal modes to the other normal or non-normal mode, when the state value satisfies a predetermined shift condition, in one of the normal and non-normal modes, and a cornering determiner unit for determining cornering status, wherein the control unit causes a change in the output of the electric motor to be less, when the electric motorcycle is cornering and the shift condition is satisfied than when the cornering determiner unit determines the electric motorcycle is not cornering and the shift condition is satisfied.