Eco-Friendly Vehicle Audio I/O Noise Control via Powertrain Shift
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Solution Overview
Problem
Powertrain noise in eco-friendly vehicles interferes with voice command recognition and audio guidance, reducing the effectiveness of voice input/output functions and increasing driver distraction.
Innovation Solution
A method and system for controlling the noise level in eco-friendly vehicles by adjusting the operating point of the driving power source based on the current drive mode, using noise maps for torque and RPM to shift gears or change engine operating points, thereby reducing motor or engine noise and stabilizing torque output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the driver uses voice commands for navigation and control, then driving distraction is reduced, but powertrain noise reduces voice command recognition rate and audio guidance clarity
Solution Approach 1:
The system dynamically changes the operating parameters (RPM and torque) of the driving power source based on noise maps to minimize powertrain noise during voice input/output operations, thereby improving voice command recognition rate and audio guidance clarity while maintaining ease of voice-based operation
2Speed
If the power source operates at higher RPM for better performance, then vehicle speed and acceleration improve, but powertrain noise increases interfering with audio input/output
Solution Approach 1:
The system utilizes noise maps that correlate RPM and torque with powertrain noise levels to dynamically adjust operating parameters, finding optimal balance points that maintain vehicle speed while minimizing noise generation during voice-critical operations
Solution Approach 2:
The system dynamically adjusts the operating point of the power source in real-time based on current driving conditions and voice input/output status, transitioning between different RPM and torque levels to balance performance requirements with noise reduction goals
3Reliability
If the system performs frequent gear shifts to optimize noise levels, then voice recognition improves, but driving dynamics and response time may be affected
Solution Approach 1:
The system performs dynamic gear shift control based on real-time voice input/output status and current driving conditions, adjusting gear selection to optimize the power source operating point for minimal noise while maintaining acceptable driving response characteristics
Data Source
AI summary
The present disclosure relates to an eco-friendly vehicle in which powertrain noise may be controlled such that voice command recognition of the vehicle control system may be improved and also audio guidance therefrom may be better recognized by a driver, and a method for supporting audio input/output for the same. A method of supporting audio input/output for an eco-friendly vehicle according to an embodiment of the present disclosure includes determining whether a first condition for audio input/output function and a second condition for inside noise level are satisfied; and performing a noise reduction control by changing an operating point of a driving power source based on a current drive mode, in case where the first and the second conditions are satisfied.