Braking Force Control via Road Slope Detection
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Solution Overview
Problem
Existing vehicle control technologies fail to maintain consistent acceleration/deceleration and vehicle speed when traversing roads with changing slopes, leading to unwanted changes in braking/driving force.
Innovation Solution
A braking/driving force control method and device that adjusts the braking or driving force based on the magnitude of the road surface slope, using a correction amount to stabilize vehicle speed by detecting slope changes and adjusting torque settings accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the operation amount of the accelerator pedal is used to control braking/driving force, then the vehicle acceleration/deceleration can be controlled, but the acceleration/deceleration and vehicle speed change when the road surface slope changes
Solution Approach 1:
The control device detects the actual vehicle acceleration/deceleration and road surface slope, compares these with target values, and adjusts the braking/driving force accordingly. This closed-loop feedback mechanism compensates for slope changes and maintains stable vehicle speed while preserving accelerator pedal control.
Solution Approach 2:
The system dynamically adjusts the braking/driving force parameters based on detected road surface slope and actual vehicle acceleration/deceleration. By changing these parameters in response to slope variations, the system maintains consistent vehicle performance despite changing road conditions.
2Speed
If the braking/driving force is controlled based on accelerator pedal operation amount, then the target acceleration/deceleration can be achieved, but the vehicle speed varies with road surface slope changes
Solution Approach 1:
The system continuously monitors actual vehicle acceleration/deceleration and road surface slope, comparing these measurements with target values. This feedback enables real-time adjustments to maintain both target acceleration/deceleration and consistent vehicle speed despite slope variations.
Solution Approach 2:
The control device detects road surface slope changes and proactively adjusts the braking/driving force before significant speed deviations occur. This preliminary action prevents vehicle speed variations caused by slope changes while maintaining the intended acceleration/deceleration profile.
3Device complexity
If no slope compensation is applied, then the control system remains simple, but the acceleration/deceleration and vehicle speed change with slope variations
Solution Approach 1:
The system uses feedback from acceleration sensors and slope detectors to automatically adjust braking/driving force. This feedback mechanism provides slope compensation without requiring complex mechanical adjustments, maintaining acceleration/deceleration consistency through electronic control.
Solution Approach 2:
The patent replaces complex mechanical slope compensation mechanisms with electronic sensing and control. By using sensors to detect slope and acceleration, and electronically adjusting the braking/driving force, the system achieves stable performance with simpler overall architecture.
Data Source
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AI summary
A magnitude of a road surface slope along which a vehicle travels is detected, when the magnitude of the road surface slope increases, a basic braking force set in advance is corrected to be decreased based on the magnitude of the road surface slope, or a basic driving force set in advance is corrected to be increased based on the magnitude of the road surface slope, when the magnitude of the road surface slope decreases, a basic braking force is corrected to be increased based on the magnitude of the road surface slope or a basic driving force is corrected to be decreased based on the magnitude of the road surface slope, and the corrected braking force or driving force is generated.