Braking Force Control for Neutral to In-Gear Shifts
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Solution Overview
Problem
Saddle ride-type vehicles face challenges in controlling braking force when switching from a neutral state to an in-gear state, leading to unwanted vehicle behavior due to the rotation of the drive wheel, which existing technologies do not adequately address.
Innovation Solution
A braking force control apparatus that detects the transition from a neutral state to an in-gear state and applies braking force to the drive wheel, reducing it once the engine driving force reaches a predetermined value, thereby preventing vehicle behavior without the need for a synchronizer or increased transmission size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the transmission is switched from neutral state to in-gear state during stopping, then the drive wheel rotates due to clutch dragging, but this causes unwanted vehicle behavior
Solution Approach 1:
The control device applies braking force to the drive wheel in advance during the transmission switching process from neutral to in-gear state. This preliminary counter-action prevents the drive wheel rotation caused by clutch dragging, thereby suppressing vehicle body movement and maintaining stability during the switching operation.
Solution Approach 2:
The brake device acts as an intermediary element between the transmission switching operation and the drive wheel. By introducing this mediating braking force, the system controls the interaction between the rotating main shaft and the stopped sub shaft, preventing direct transmission of disruptive forces to the vehicle body.
2Stability of the object's composition
If a synchronizer is added to absorb rotation difference between speed change gears, then vehicle behavior is suppressed, but the transmission size increases
Solution Approach 1:
The invention replaces the mechanical synchronizer mechanism with a control system that uses braking force to manage the transmission switching. Instead of adding a mechanical component to absorb rotation differences, the system uses controlled braking to prevent drive wheel rotation, achieving the same stability effect without increasing transmission size.
Solution Approach 2:
The control device dynamically adjusts the braking force parameter during the transmission switching process. By changing the braking force from zero to a predetermined value and then releasing it, the system controls the drive wheel rotation without requiring additional mechanical components, thereby maintaining compact transmission dimensions.
3Stability of the object's composition
If braking force is maintained until start operation is performed, then smooth restart on uphill road is achieved, but braking force must be released at appropriate timing
Solution Approach 1:
The control device uses feedback from the transmission state and driving conditions to determine the appropriate timing for releasing braking force. By monitoring whether the transmission is in neutral or in-gear state and the engine driving force level, the system automatically releases braking force at the optimal moment, ensuring smooth restart on uphill roads while eliminating the need for manual timing judgment.
Data Source
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AI summary
To provide a braking force control apparatus for a saddle ride-type vehicle, which generates braking force when switching a transmission from a neutral state to an in-gear state. A braking force control apparatus for a saddle ride-type vehicle, including: a control device (106) configured to control a transmission (40) which reduces driving force of an engine (100) by a predetermined speed reduction ratio and transmits the driving force to a drive wheel (WR) of a vehicle (1), a clutch device (108) which connects and disconnects the driving force between the engine (100) and the transmission (40), and a brake device (BR) which generates braking force on the drive wheel (WR), wherein the transmission (40) is configured to be capable of switching between a neutral state where gear trains are mechanically disconnected and an in-gear state where the disconnected gear trains are mechanically connected, and upon detection of switching from the neutral state to the in-gear state, the control device (106) causes the brake device (BR) to generate braking force (B) on the drive wheel (WR), and then releases the braking force (B) upon completion of the switching operation to the in-gear state.