Battery EV Pseudo Engine Sound Control for Night Driving
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Solution Overview
Problem
Existing sound control devices for battery electric vehicles do not adequately consider the reduced field of view during night time, which can be compromised by the ambiance provided by pseudo engine sounds, potentially affecting safe driving.
Innovation Solution
A vehicle control method and device that adjusts the sound pressure of pseudo engine sounds based on the time of day, reducing sound pressure at night to enhance driver safety while maintaining an ambient experience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If pseudo engine sound is output at full sound pressure during night time, then driver ambiance is improved, but driver safety deteriorates due to reduced field of view
Solution Approach 1:
The sound control device dynamically adjusts the sound pressure of pseudo engine sound based on the time of day. During day time, full sound pressure is maintained to provide ambiance, while during night time, sound pressure is reduced to prioritize driver safety. This temporal dynamic adjustment resolves the contradiction between ambiance and safety.
Solution Approach 2:
The system changes the sound pressure parameter of pseudo engine sound according to the time period. By modifying this physical parameter based on whether it is day or night, the system optimizes both driver ambiance and safety for different operating conditions.
2Reliability
If pseudo engine sound pressure is reduced at night, then driver safety is improved, but driver ambiance deteriorates
Solution Approach 1:
The system applies dynamic control by switching between different sound pressure levels based on time of day. The sound control device detects night time conditions and automatically adjusts sound pressure downward, accepting reduced ambiance as a necessary trade-off for improved safety during nighttime operation.
3Ease of operation
If pseudo engine sound is output continuously at high sound pressure, then driver ambiance is maintained, but energy consumption increases
Solution Approach 1:
The sound control device implements periodic action by alternating between high sound pressure during day time and reduced sound pressure during night time. This temporal pattern reduces overall energy consumption while maintaining ambiance during periods when it is most needed.
Solution Approach 2:
The system changes the sound pressure parameter based on time of day conditions. By lowering the parameter during night time, the system reduces energy consumption while accepting reduced ambiance as a necessary compromise during low-activity periods.
Data Source
AI summary
A vehicle control method includes: a processor generating a pseudo engine sound to be output from a cabin speaker of a battery electric vehicle based on operation information for a constituent element of the battery electric vehicle; the processor adjusting a sound pressure of the pseudo engine sound based on a time period to which a present time belongs, and outputting the pseudo engine sound from the cabin speaker; and the processor making an adjustment so as to reduce the sound pressure of the pseudo engine sound when the present time belongs to a night time period, compared to when the present time belongs to a day time period.