Vehicle Engine Sound Control via Intake and Exhaust Temperature
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Solution Overview
Problem
Conventional audio systems in vehicles fail to accurately adjust engine sound output based on varying intake and exhaust temperatures, leading to an inconsistent aural experience that may detract from user enjoyment.
Innovation Solution
An audio control system that determines adjusted magnitudes for engine sound output at multiple frequencies using a lookup table calibrated with intake and exhaust temperatures, adjusting engine speed and torque output to compensate for temperature variations, thereby enhancing the sound experience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional audio systems output engine sound without temperature-based adjustment, then the system complexity is low, but the sound output becomes inconsistent with temperature variations
Solution Approach 1:
The system adjusts audio parameters (magnitude, frequency) based on temperature measurements. The magnitude adjustment module modifies sound magnitude according to intake air temperature and exhaust temperature, while the frequency adjustment module modifies frequency content based on these temperature parameters, resolving the contradiction by making the audio output adaptive to temperature variations
Solution Approach 2:
The system uses temperature sensors to continuously monitor intake air temperature and exhaust temperature, feeding this information back to the audio control module. The feedback control mechanism adjusts audio output in real-time based on actual temperature conditions, ensuring consistent sound output across varying operating conditions
2Adaptability or versatility
If the audio system adjusts engine sound based on temperature variations, then the aural experience becomes consistent, but the device complexity increases
Solution Approach 1:
The audio system transitions from static to dynamic operation by continuously adjusting magnitude and frequency parameters based on real-time temperature data. The magnitude adjustment module and frequency adjustment module operate dynamically to match the changing acoustic characteristics of the engine under different temperature conditions
Solution Approach 2:
The audio control system is divided into separate functional modules: a magnitude adjustment module that handles amplitude adjustments, a frequency adjustment module that handles spectral modifications, and a sound control module that integrates both functions. This segmentation allows each module to specialize in specific adjustments, managing complexity through modular architecture
3Measurement precision
If the system uses lookup tables calibrated with temperature data, then the measurement precision of sound output is improved, but the device complexity increases
Solution Approach 1:
The system performs preliminary calibration by pre-computing and storing lookup tables that map temperature conditions to optimal audio parameters. These pre-calculated tables are stored in memory and queried during operation, eliminating the need for complex real-time calculations while maintaining high measurement precision across different temperature conditions
Data Source
AI summary
An audio control system of a vehicle includes a sound control module configured to determine N magnitudes for outputting a predetermined engine sound at N frequencies, respectively, where N is an integer greater than one. A magnitude adjustment module is configured to determine at least one N magnitude adjustment values for the N frequencies, respectively, based on at least one of: an intake air temperature; and an exhaust temperature. The sound control module is further configured to determine N adjusted magnitudes for the predetermined engine sound at the N frequencies based on: the N magnitudes for the N frequencies, respectively; and the N magnitude adjustment values for the N frequencies, respectively. An audio driver module is configured to apply power to at least one speaker of the vehicle and output the predetermined engine sound at the N frequencies and the N adjusted magnitudes for the N frequencies, respectively.