Adaptive Cruise Controller for Motorcycle Drive Shock Smoothing
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Solution Overview
Problem
Adaptive cruise control in straddle-type vehicles, such as motorcycles, often causes discomfort due to shocks resulting from the transmission of drive power to the drive wheel, which can lead to a worsening of the driving experience.
Innovation Solution
A controller that generates a reference braking force on the drive wheel at the point when drive power is transmitted, mitigating the shock caused by the power transmission and enhancing driver comfort during adaptive cruise control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If adaptive cruise control automatically accelerates the straddle-type vehicle by driving the drive wheel, then the vehicle can travel according to distance from preceding vehicle and driver's instruction, but a shock occurs due to gear backlash when drive power is transmitted to the drive wheel, worsening driver comfort
Solution Approach 1:
The control section applies a preliminary braking force to the drive wheel before drive power is transmitted during adaptive cruise control acceleration. This counteracting braking force prevents the shock that would otherwise occur due to gear backlash when the drive wheel starts rotating, thereby maintaining driver comfort while preserving the automated cruise control function.
Solution Approach 2:
The invention converts the potentially harmful braking force into a beneficial control mechanism. By intentionally applying a controlled braking force during the transition from braking to acceleration, the system eliminates the harmful shock effect while maintaining smooth automated operation, effectively turning a negative factor into a solution for improving ride comfort.
2Object-affected harmful factors
If a braking force is generated on the drive wheel to prevent shock during power transmission, then driver comfort is improved, but acceleration performance may be affected
Solution Approach 1:
The control section dynamically adjusts the braking force applied to the drive wheel based on the operational phase. The braking force is applied only during the specific transition period when drive power is being transmitted to prevent shock, and is reduced or canceled when the drive wheel is already rotating. This dynamic control maintains both comfort and acceleration performance by applying braking force only when necessary.
Solution Approach 2:
The braking force is applied in advance during the power transmission transition before the drive wheel fully engages. This preliminary application of braking force prevents the shock from occurring in the first place, allowing the drive wheel to start rotating smoothly without sudden impacts, thereby maintaining both comfort and acceleration capability.
Data Source
AI summary
The present invention obtains a controller and a control method capable of securing a driver's comfort during adaptive cruise control for 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, when a state where a braking force is generated on at least one of wheels of the straddle-type vehicle is switched to a state where a drive wheel is driven using drive power output from a drive source of the straddle-type vehicle, the braking force generated on the at least one of the wheels is controlled such that a reference braking force is generated on the drive wheel at a time point at which the drive wheel starts being driven due to transmission of the drive power output from the drive source to the drive wheel.