Active Accelerator Pedal Effort Control via Motor-Driven Spring Adjustment
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Solution Overview
Problem
Current accelerator pedal systems cannot actively adjust pedal effort based on driving mode and parking mode, as the spring's elastic coefficient is preset and cannot be changed without replacement, limiting adaptability to different driving conditions.
Innovation Solution
An active control system using a processor to determine the vehicle's mode via shifting stage input signals and velocity, adjusting the pedal effort by varying the spring's length through a motor and power transmission mechanism, allowing for increased or decreased pedal effort based on driving mode and parking mode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the spring's elastic coefficient is preset to meet safety regulations, then the safety compliance is ensured, but the pedal effort cannot be adjusted for different driving modes
Solution Approach 1:
The patent applies the Dynamics principle by making the pedal effort adjustable through a motor-driven mechanism that changes the spring's effective length or preload force. Instead of a fixed spring system, the invention introduces an actuator that dynamically modifies the spring characteristics based on detected driving modes (e.g., towing mode, normal mode), allowing the same physical spring to provide different effort levels without replacement.
Solution Approach 2:
The invention implements Parameter changes by varying the spring's operational parameters (such as preload force or effective length) through motor actuation. The controller adjusts these parameters in response to mode detection signals, enabling the spring to deliver different pedal effort values while maintaining the same physical component, thus avoiding the need for spring replacement.
2Adaptability or versatility
If a motor and power transmission mechanism are added to adjust pedal effort, then adaptability to different driving modes is improved, but device complexity increases
Solution Approach 1:
The patent applies the Universality principle by integrating the motor actuator into the existing pedal mechanism in such a way that it serves multiple functions: adjusting pedal effort for different driving modes, maintaining safety compliance, and potentially providing diagnostic information about system status. This multi-functionality justifies the added complexity by delivering multiple benefits from a single integrated system.
Solution Approach 2:
The invention implements Feedback through a control system that detects the vehicle's operating mode (via sensors or controller signals) and automatically adjusts the pedal effort accordingly. The controller receives mode detection signals and sends corresponding control signals to the motor actuator, creating a closed-loop system that adapts pedal characteristics to match actual driving conditions, thereby improving adaptability while managing complexity through automated control.
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
Enables dynamic adjustment of pedal effort to improve user convenience and safety by adapting to different driving conditions without replacing components, ensuring compliance with safety regulations.
Implementation Method 1
the spring 6 is compressed elastically to provide pedal effort to the pedal pad 4 when the pedal arm 2 rotates with respect to the pedal arm housing 1 through a hinge shaft 7
Data Source
AI summary
An active control system and method for an accelerator pedal effort is disclosed, in which the pedal effort of the accelerator pedal is varied actively in accordance with a driving mode and a parking mode of a vehicle.