Straddle Vehicle Steering Damper Oscillation Control
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Solution Overview
Problem
Straddle type vehicles experience oscillations in the steering mechanism after the front wheel lands from a wheelie state, which existing technologies fail to effectively suppress, leading to unnatural vehicle behavior and compromised riding comfort.
Innovation Solution
A straddle type vehicle equipped with a steering mechanism and a steering damper device capable of variably generating damping force, controlled by a unit that increases damping force after the front wheel lands and oscillation occurs, thereby suppressing the oscillation of the steering mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If damping force is increased immediately when front wheel lands from wheelie state, then oscillation suppression is improved, but impact on vehicle body increases
Solution Approach 1:
The control unit detects wheelie state in advance and prepares to increase damping force before the front wheel actually lands. By timing the damping force increase to occur just before landing rather than immediately upon landing, the system suppresses the oscillation that would occur while minimizing the impact transmitted to the vehicle body.
Solution Approach 2:
The steering damper device dynamically adjusts its damping force based on real-time detection of vehicle state. The damping force is variable and changes according to whether the vehicle is in wheelie state or normal state, allowing optimal suppression of oscillation while adapting to different operating conditions to minimize unwanted impacts.
2Ease of operation
If damping force is increased after oscillation begins, then riding comfort is improved, but response time to suppress oscillation is reduced
Solution Approach 1:
The control unit detects the wheelie state in advance and increases damping force before the front wheel lands and oscillation actually begins. This preliminary action ensures that when oscillation does occur, the damping force is already elevated to suppress it effectively, maintaining both quick response and riding comfort.
Solution Approach 2:
The control unit continuously monitors vehicle state including wheelie detection and steering mechanism behavior. Based on this feedback, it dynamically adjusts damping force timing and magnitude, creating a closed-loop control system that optimizes both response time and riding comfort based on actual operating conditions.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively suppresses the vibration of the steering mechanism and reduces unnatural vehicle body behavior, enhancing riding comfort by increasing damping force only after oscillation has begun, thus minimizing impact on the vehicle body.
Implementation Method 1
a steering damper device capable of variably generating a damping force working on a rotating action of the steering mechanism
Data Source
AI summary
A straddle type vehicle comprises a steering mechanism configured to steer a front wheel a steering damper device capable of variably generating a damping force working on a rotating action of the steering mechanism; and a control unit configured to control the damping force of the steering damper device to increase, when the front wheel of the straddle type vehicle in a wheelie state lands on a ground. The control unit controls the damping force to increase, after the front wheel lands on the ground and an oscillation occurs in the steering mechanism.