Reaction Force Control for Accelerator Pedal Comfort in Successive Curves
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Solution Overview
Problem
Existing vehicle control systems do not effectively manage driver discomfort caused by reaction forces on the accelerator pedal during successive curves, leading to uncomfortable operation while driving.
Innovation Solution
A reaction force control apparatus that adjusts the target reaction force on the accelerator pedal based on the curvature and distance of subsequent curves, reducing the force when entering a curve with a higher curvature or shorter distance to minimize driver discomfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a reaction force proportional to the curvature of each curve is generated prior to the vehicle entering the curves, then the driver is prompted to decelerate before entering curves, but the driver feels strange and uncomfortable concerning operation of the accelerator pedal while the vehicle is making a turn along a curve, especially when succession of curves are present
Solution Approach 1:
The reaction force control system dynamically adjusts the magnitude of reaction force based on the vehicle's current state (whether inside or outside curves) and the curvature characteristics of upcoming curves. The control force is not static but varies in real-time to match driving conditions, preventing discomfort while maintaining control effectiveness
Solution Approach 2:
The system calculates and prepares the appropriate reaction force in advance based on detected curve information before the vehicle enters the curve. By determining the control force prior to curve entry, the system can smoothly apply the force as the vehicle approaches, avoiding sudden force changes that would cause driver discomfort during curve traversal
2Reliability
If the reaction force controller sets a target reaction force for the second curve that is greater than the present reaction force while the host vehicle is turning along the first curve, then the driver is prompted to prepare for the second curve, but the driver feels strange and uncomfortable concerning operation of the accelerator pedal
Solution Approach 1:
The control system continuously monitors the vehicle's position relative to successive curves and dynamically adjusts the reaction force magnitude. When transitioning from the first curve to the second curve, the system smoothly modulates the force rather than applying a sudden increase, maintaining driver comfort while ensuring proper deceleration control for the second curve
Solution Approach 2:
The system calculates the target reaction force for the second curve in advance and begins applying it gradually as the vehicle exits the first curve and approaches the second curve. This preliminary preparation allows the driver to sense the upcoming curve and adjust accordingly without experiencing abrupt force changes that would cause discomfort
Data Source
AI summary
Provided is a reaction force control device for reducing discomfort experienced by the driver operating the accelerator pedal when continuous curves are being traveled, and setting the characteristics of the reaction force on the accelerator pedal in accordance with the curves. In the case that the target reaction force, which has been set prior to entering a subsequently traveled second curve, is greater than the current reaction force acting on the acceleration pedal and being generated during the turn through the first curve, a reaction force controller controls the operation so as to reduce the target reaction force imparted on the second curve until the vehicle leaves the first curve.