Motorcycle ACC Cornering Control via Front-Rear Force Distribution
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Straddle-type vehicles, such as motorcycles, face challenges in achieving appropriate cornering during adaptive cruise control due to inadequate control of braking force and drive power distribution, which can lead to unintended rolling behavior.
Innovation Solution
A controller that adjusts braking force and drive power distribution between the front and rear wheels based on lateral acceleration to maintain stable cornering during adaptive cruise control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If adaptive cruise control automatically exerts braking force or drive power on the straddle-type vehicle, then the vehicle can accelerate or decelerate without driver operation, but the vehicle posture in the rolling direction becomes unstable during cornering
Solution Approach 1:
The control device changes the distribution parameters of braking force and drive power between front and rear wheels based on detected lateral acceleration. When lateral acceleration exceeds a threshold, the system adjusts the braking force distribution ratio and drive power distribution ratio to appropriate values, thereby maintaining stable vehicle posture during cornering while preserving automatic cruise control functionality.
2Reliability
If braking force or drive power is automatically exerted on the straddle-type vehicle during adaptive cruise control, then the vehicle can maintain travel according to distance from preceding vehicle, but unintended rolling behavior occurs during cornering
Solution Approach 1:
The control device continuously detects lateral acceleration of the vehicle and uses this feedback information to adjust braking force distribution and drive power distribution in real-time. When lateral acceleration indicates cornering conditions, the system automatically adjusts the force distribution ratios to prevent unintended rolling, while maintaining the adaptive cruise control's reliable distance-based travel management.
3Speed
If the straddle-type vehicle corners by leaning in the rolling direction, then the vehicle can achieve turning motion, but the leaning posture is influenced by automatically exerted braking force or drive power
Solution Approach 1:
The control device acts as an intermediary between the automatic cruise control system and the vehicle's cornering dynamics. By detecting lateral acceleration and adjusting braking force/drive power distribution as a mediating action, the system allows the vehicle to maintain its natural leaning cornering behavior while preventing unwanted rolling effects that would interfere with driver-intended posture.
Data Source
AI summary
The present invention obtains a controller and a control method capable of achieving appropriate cornering during adaptive cruise control of a straddle-type vehicle.In the controller and the control method according to the present invention, during the adaptive cruise control in which the straddle-type vehicle is made to travel according to a distance from the straddle-type vehicle to a preceding vehicle, motion of the straddle-type vehicle, and a driver's instruction, at least one of braking force distribution, which is distribution of braking forces generated on wheels of the straddle-type vehicle to the front and rear wheels, and drive power distribution, which is distribution of drive power transmitted to the wheels of the straddle-type vehicle to the front and rear wheels, is controlled on the basis of lateral acceleration of the straddle-type vehicle.