Motorcycle Cruise Control for Smooth Corner Exit Deceleration
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Solution Overview
Problem
Straddle-type vehicles, such as motorcycles, face difficulties in cornering during cruise control due to inadequate control of acceleration/deceleration, which affects the vehicle's posture and makes appropriate cornering challenging.
Innovation Solution
A controller that restricts vehicle speed to an upper limit during turns, detects the exit of a curved road based on a predicted route, and reduces deceleration before reaching the exit, allowing for appropriate cornering by controlling acceleration/deceleration without driver input.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If cruise control automatically controls acceleration/deceleration of the straddle-type vehicle, then the driver's operation burden is reduced, but appropriate cornering becomes difficult due to inadequate control of acceleration/deceleration during turns
Solution Approach 1:
The control section performs preliminary actions by detecting curved roads in advance using map data and GPS information, and pre-adjusts acceleration/deceleration control parameters before the vehicle enters the curve. This allows the cruise control system to prepare appropriate control settings ahead of time, ensuring both automatic operation and safe cornering performance.
Solution Approach 2:
The system dynamically adjusts acceleration/deceleration control parameters based on real-time detection of curved roads and current vehicle speed. The control section modifies control characteristics adaptively when curvature is detected, transitioning from standard cruise control to curve-appropriate control, thereby maintaining reliability while preserving automatic operation benefits.
2Stability of the object's composition
If the vehicle speed is restricted to be equal to or lower than an upper limit speed at the time of turning, then cornering stability is improved, but the productivity of the vehicle is reduced
Solution Approach 1:
The system applies speed restriction locally only when and where curved roads are detected, rather than imposing a universal speed limit. The control section compares the current route with map data to identify curves, and only then applies the upper limit speed restriction. On straight roads, the vehicle maintains normal cruising speed, thus preserving productivity while ensuring cornering stability when needed.
3Ease of operation
If the magnitude of deceleration is reduced before the vehicle reaches the exit of a curved road, then the driver can smoothly transition through the curve, but the time required to control the vehicle increases
Solution Approach 1:
The control section performs preliminary deceleration control by detecting the exit of curved roads in advance using map data and GPS, and begins reducing deceleration magnitude before the vehicle reaches the exit. This preliminary action allows smooth transition preparation ahead of time, enabling the driver to upright the vehicle smoothly without rushing the maneuver, while the automated timing eliminates manual judgment time.
Data Source
AI summary
The present invention obtains a controller and a control method capable of achieving appropriate cornering during cruise control of a straddle-type vehicle.In the controller and the control method according to the present invention, during the cruise control, in which acceleration/deceleration of the straddle-type vehicle is automatically controlled without relying on an accelerating/decelerating operation by a driver, a vehicle speed of the straddle-type vehicle is restricted to be equal to or lower than an upper limit speed at the time of turning, an exit of a curved road is detected on the basis of a predicted route of the straddle-type vehicle, and a magnitude of the deceleration of the decelerated straddle-type vehicle is reduced at a time point before the straddle-type vehicle reaches the exit.