Saddle-ride Vehicle Steering Torque Control for Stand Stability
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Solution Overview
Problem
The attitude of saddle-ride vehicles becomes unstable when a rider stands on the main stand or shifts it from an upright to a retracted state, causing the wheel to touch the road surface.
Innovation Solution
A saddle-ride vehicle equipped with a main stand, a first detection unit for monitoring the main stand's turning state, a steering actuator that applies torque to the suspension apparatus supporting the steering wheel, and a control apparatus that directs the steering wheel towards the front based on the main stand's state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the main stand is used to hold the vehicle body, then the vehicle can be stabilized during parking, but the steering wheel may rotate causing vehicle attitude to become unstable when the stand is operated
Solution Approach 1:
The control apparatus applies counter-steering torque to the suspension apparatus in advance to counteract the steering wheel rotation that occurs during main stand operation. This preliminary anti-action prevents the vehicle attitude from becoming unstable by opposing the destabilizing force before it can cause significant deviation.
Solution Approach 2:
The system continuously detects the turning state of the main stand and the steering wheel position, then adjusts the steering actuator output accordingly. This feedback loop ensures that the steering wheel remains stable during main stand operation by dynamically compensating for any rotation that occurs.
2Reliability
If the steering actuator applies torque to prevent steering wheel rotation, then vehicle attitude stability is improved, but the system complexity increases due to additional control mechanisms
Solution Approach 1:
The existing steering actuator, originally designed for steering assistance, is repurposed to also apply counter-steering torque during main stand operation. This multi-functionality approach prevents the need for a separate stabilization mechanism, thereby limiting the increase in system complexity while still achieving the stability improvement.
Solution Approach 2:
The control apparatus merges the steering control function with the stability control function by using a single integrated control system that manages both normal steering operations and main stand stabilization. This consolidation reduces the number of separate control systems needed.
Data Source
AI summary
There is provided a saddle-ride vehicle in which an attitude of the vehicle is less likely to become unstable when a rider shifts a main stand from an upright state to a retracted state to cause a wheel to touch a road surface. A saddle-ride vehicle according to the present disclosure includes: a main stand (35) that is turnably provided on a vehicle body (5) and holds the vehicle body (5) so that the vehicle body (5) does not topple over; a first detection unit (36) that detects a turning state of the main stand (35); a steering actuator (30) that applies torque in a steering direction to a suspension apparatus (31) supporting a steering wheel (13); and a control apparatus (34) that controls the steering actuator (30) to apply the torque to the suspension apparatus (31), in which the control apparatus (34) performs control to apply the torque so that the steering wheel (31) is directed toward a front (FR), depending on the turning state of the main stand (35).