Vehicle Control System for Unmanned Noise Reduction
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Solution Overview
Problem
Unmanned vehicle operations, such as early morning or nighttime movements, often result in excessive exterior noise due to internal combustion engines, which is a concern for noise pollution.
Innovation Solution
A control system that includes an electronic control unit to limit the output of the internal combustion engine when the vehicle is in an unmanned state, by reducing engine output, shifting gears, or relying solely on an electric motor, thereby minimizing noise during unmanned operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the internal combustion engine operates at normal output during unmanned running, then the vehicle can maintain sufficient driving performance, but excessive exterior noise is generated causing noise pollution
Solution Approach 1:
The patent applies dynamics by making the engine output adjustable based on operating conditions. The control system dynamically modifies engine parameters (rotation speed, load, injection amount, ignition timing) according to whether the vehicle is in manned or unmanned mode, allowing the engine to operate at reduced output during unmanned running while maintaining sufficient performance when needed.
Solution Approach 2:
The patent implements parameter changes by modifying key engine operating parameters including rotation speed, load, fuel injection amount, and ignition timing. These parameter adjustments enable the engine to reduce output during unmanned operation, directly addressing the noise pollution issue while preserving driving capability when required.
2Object-affected harmful factors
If the engine output is limited during unmanned running to reduce noise, then noise pollution is reduced, but driving performance may be insufficient
Solution Approach 1:
The patent applies feedback through the control system that continuously monitors vehicle operating conditions and automatically adjusts engine parameters. The system receives feedback about the unmanned/manned state and corresponding driving conditions, then modifies engine output accordingly, ensuring noise reduction during unmanned running while maintaining adequate performance when driving conditions require it.
Solution Approach 2:
The system dynamically adapts engine output based on real-time conditions. During unmanned running, the engine operates at reduced parameters for noise reduction, but can quickly transition to full performance when manned operation is detected or when driving conditions necessitate higher power output.
3Object-affected harmful factors
If the vehicle uses only electric motor during unmanned running, then noise is significantly reduced, but energy consumption increases
Solution Approach 1:
The patent implements multi-functionality by creating a hybrid power system that can operate in multiple modes: electric motor only, internal combustion engine only, or combined operation. This universal system allows the vehicle to select the most energy-efficient configuration based on conditions, using electric motor during unmanned running for noise reduction while maintaining the option to engage the engine when energy efficiency becomes critical.
Solution Approach 2:
The system changes operational parameters by switching between different power sources and adjusting their output levels. During unmanned running, it parameters are set to favor electric motor operation for noise reduction, but can transition to engine-assisted or engine-only mode when energy consumption becomes a concern, thus dynamically optimizing the energy-noise tradeoff.
Data Source
AI summary
A control system is for a vehicle that includes an internal combustion engine. The control system includes an electronic control unit. The electronic control unit is configured to limit an output of the internal combustion engine when the electronic control unit determines that the vehicle runs in an unmanned state, such that the output of the internal combustion engine is lower the vehicle runs in the unmanned state than when the vehicle runs in a manned state.