Accelerator Grip Control for Downhill Speed Hold on Motorcycles
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Solution Overview
Problem
Existing straddle-type vehicle control systems lack intuitive and simple operations for vehicle speed control, particularly when traveling on downhill roads, which hinders the overall operability of the vehicle.
Innovation Solution
A controller that enables vehicle speed control based on rotational operation information from the accelerator grip, allowing the system to automatically adjust vehicle speed according to a target speed when traveling downhill, and can be initiated and terminated through intuitive rotational operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If vehicle speed control is implemented on downhill roads, then vehicle speed is automatically suppressed to low levels, but the complexity of the control system increases
Solution Approach 1:
The accelerator grip is designed to serve dual purposes: its primary function for controlling drive power and a secondary function as an operation section for enabling/disabling vehicle speed control. By detecting rotational operations beyond a predetermined angle range, the system activates or deactivates speed control without requiring separate controls, thereby reducing system complexity while maintaining reliability
Solution Approach 2:
The control system merges the vehicle speed control activation/disactivation function with the existing accelerator grip operation. Instead of adding a separate control mechanism, the system combines both functions into a single operational interface, simplifying the overall control system architecture while ensuring reliable speed control functionality
2Reliability
If a separate control mechanism is added for vehicle speed control, then control functionality is improved, but ease of operation deteriorates
Solution Approach 1:
The accelerator grip serves multiple functions including drive power control and vehicle speed control activation/disactivation. This multi-functionality eliminates the need for separate controls, maintaining ease of operation while ensuring reliable speed control through the existing ergonomic interface
Solution Approach 2:
The system uses the rider's natural operational patterns with the accelerator grip to automatically enable or disable vehicle speed control. The grip's rotational position relative to the neutral position serves as both the drive input and the control activation signal, allowing the system to self-regulate based on rider input without additional controls
Data Source
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AI summary
The invention obtains a controller and a control method capable of improving operability of a straddle-type vehicle. In a controller 20 and a control method according to the invention, an execution section of the controller 20 executes a control mode in which vehicle speed control is enabled in response to a first trigger and the vehicle speed control is disabled in response to a second trigger. In the vehicle speed control, a vehicle speed of a straddle-type vehicle 1 is controlled on the basis of a target vehicle speed in the case where it is determined that the straddle-type vehicle 1 travels on a downhill road. The execution section executes the control mode on the basis of rotational operation information as information on a rotational operation to rotate an accelerator grip, which is located at a reference position in an unloaded state by a rider of the straddle-type vehicle 1 and changes drive power generated to the straddle-type vehicle 1 when being rotated within an angle range located in a first direction with the reference position being a reference, within an angle range located in a second direction as a reverse direction from the first direction with the reference position being the reference.