Acceleration Pedal Haptic Feedback for EV Driver Awareness
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Solution Overview
Problem
Electric vehicles lack tactile feedback through the acceleration pedal due to quiet electric motors, which can lead to a diminished sense of power and speed, unlike internal combustion engines that provide subtle vibrations and sounds for driver awareness.
Innovation Solution
A haptic feedback system for vehicle acceleration pedals using a vibration transducer connected to the pedal, controlled by a vehicle control module that senses vehicle operation parameters to selectively provide tactile feedback based on drive mode, battery state, gear state, brake position, and pedal position, simulating engine feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If electric motors are used in vehicles, then energy efficiency and quiet operation are improved, but driver awareness of power and speed is reduced due to lack of tactile feedback
Solution Approach 1:
The system introduces haptic feedback through a vibration transducer connected to the acceleration pedal, which generates vibrations in response to motor operation. This feedback loop allows the driver to perceive vehicle power and speed through tactile sensations, compensating for the lack of natural engine vibrations in electric vehicles while maintaining energy efficiency.
Solution Approach 2:
The vibration transducer acts as an intermediary device between the electric motor and the driver. It converts electrical signals into mechanical vibrations that are transmitted through the acceleration pedal, enabling the driver to sense motor output without requiring the motor itself to produce audible or tactile noise.
2Loss of information
If vibration transducer is added to provide haptic feedback, then driver awareness is improved, but device complexity increases
Solution Approach 1:
The vibration transducer is integrated into the existing acceleration pedal assembly, serving both as a feedback mechanism and maintaining its original structural function. The control module leverages existing vehicle sensors and communication buses (CAN bus) to generate feedback signals, reducing the need for separate dedicated systems and minimizing overall complexity.
Solution Approach 2:
The system utilizes existing vehicle operation parameters from sensors already present in the vehicle to control the haptic feedback. The control module processes readily available data such as motor speed, torque, and acceleration to automatically adjust vibration characteristics, eliminating the need for additional specialized sensors or complex processing systems.
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
Enhances driver awareness of vehicle power and performance by providing intelligent tactile feedback, improving driving experience and safety by mitigating accidental over-acceleration.
Implementation Method 1
a vibration transducer mechanically connected with the acceleration pedal, the vibration transducer configured to vibrate the acceleration pedal according to a haptic feedback signal supplied to the vibration transducer
Data Source
AI summary
A haptic feedback system for a vehicle acceleration pedal includes an acceleration pedal configured to control acceleration of a motor of a vehicle, and a vibration transducer mechanically connected with the acceleration pedal. The vibration transducer is configured to vibrate the acceleration pedal according to a haptic feedback signal supplied to the vibration transducer. The haptic feedback system includes at least one vehicle sensor configured to sense one or more vehicle operation parameters, and a vehicle control module configured to obtain the one or more vehicle operation parameters via the at least one vehicle sensor, and selectively supply the haptic feedback signal to the vibration transducer according to the one or more vehicle operation parameters, to selectively vibrate the acceleration pedal.