Vehicle Accelerator Pedal With Magnetic Reaction Force
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Solution Overview
Problem
Mechanical accelerator pedals are prone to operational issues due to environmental factors and cable deterioration, while electronic pedals lack the tactile response and hysteresis needed to reduce driver fatigue, leading to complex systems with increased components.
Innovation Solution
An accelerator pedal structure that applies a foot effort to a pedal part through a wheel assembly with a magnetic member and coil spring, providing a simplified and adjustable friction mechanism to enhance user satisfaction and reduce fatigue.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a mechanical accelerator pedal with cable is used, then tactile response is improved, but reliability deteriorates due to cable deterioration and environmental factors
Solution Approach 1:
The patent replaces the mechanical cable system with an electronic sensor-based system that includes a pedal assembly, sensor unit, and control unit. This substitution eliminates the cable while maintaining tactile feedback through a reaction force generator, thereby improving reliability without sacrificing tactile response.
2Reliability
If an electronic accelerator pedal without cable is used, then reliability is improved, but tactile response deteriorates due to lack of hysteresis
Solution Approach 1:
The patent introduces a reaction force generator as an intermediary component between the pedal assembly and the driver. This generator creates hysteresis by applying a reaction force to the pedal, providing tactile feedback that mimics the feel of a mechanical cable system while maintaining the reliability benefits of an electronic pedal.
3Ease of manufacture
If hysteresis is added to electronic accelerator pedal, then tactile response is improved, but device complexity increases due to additional components
Solution Approach 1:
The patent merges the reaction force generator with the pedal assembly into an integrated unit. The generator is positioned within the pedal assembly structure, sharing common components such as the pedal shaft and mounting mechanisms. This integration reduces overall system complexity while maintaining the tactile feedback function.
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 provides a high-satisfaction, convenient-to-repair accelerator pedal with reduced driver fatigue by applying a consistent foot effort through a simplified structure, facilitating long-term driving comfort.
Implementation Method 1
a magnetic member configured to be selectively come in contact with the metal member when the controller applies the magnetic force
Implementation Method 2
a coil spring positioned on an inside of the contact member and configured to apply a reaction force to the contact member
Implementation Method 3
a friction member of an arm assembly that comes in contact with a wheel assembly
Data Source
AI summary
An accelerator pedal for a vehicle is provided, which includes a member that is fixed to a bottom of the vehicle, a pedal part that is pivotally fastened to an upper surface of the member, and an arm assembly that is positioned on the member and configured to be rotated based on an input onto the pedal part. A spring is configured to come in contact with the arm assembly and a wheel assembly is disposed adjacent to a first end of the arm assembly to provide a foot effort to the arm assembly. A controller is configured to apply the foot effort to the arm assembly in a state where the wheel assembly is configured to selectively come in contact with the first end of the arm assembly.