Vehicle Control System Deposition Removal
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Solution Overview
Problem
Conventional vehicle control systems generate noise and vibrations when attempting to remove deposition from purification systems, such as catalytic converters and particulate filters, which reduces engine output and emits particulate matter.
Innovation Solution
A vehicle control system that autonomously operates a vehicle with a controller that determines the presence of a passenger and adjusts the engine output or speed to execute removal control, using different threshold values and conditions to minimize noise and vibrations, particularly when carrying a passenger, by increasing the frequency of removal control when the vehicle is operated without a passenger.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the engine operating condition is changed to remove deposition from the purification system, then the deposition is removed, but noise and vibrations are generated
Solution Approach 1:
The system performs removal control at predetermined intervals to proactively remove deposition from the purification system before it significantly degrades performance. This preliminary maintenance approach prevents the need for more aggressive, noise-generating removal operations later while maintaining reliable purification function.
Solution Approach 2:
The controller executes removal control periodically at predetermined intervals rather than continuously or reactively. This periodic operation allows the engine to return to normal operating conditions between maintenance cycles, minimizing the duration and impact of noise and vibrations while ensuring deposition is removed before affecting purification effectiveness.
2Reliability
If unburnt fuel is supplied to the exhaust pipe to raise temperature, then deposition is removed, but fuel consumption increases
Solution Approach 1:
The system supplies unburnt fuel to the exhaust pipe proactively at predetermined intervals to remove deposition before it significantly impairs purification performance. This preventive approach uses minimal fuel compared to reactive high-temperature regeneration, maintaining purification reliability while minimizing energy consumption.
Solution Approach 2:
The controller temporarily changes engine operating parameters by supplying unburnt fuel to the exhaust pipe to raise temperature for deposition removal. This parameter change is controlled and time-limited, using the minimum necessary fuel input to achieve effective cleaning while minimizing impact on overall fuel consumption.
3Reliability
If engine output is increased to raise purification system temperature, then deposition is removed, but engine output is reduced during operation
Solution Approach 1:
The system performs removal control at predetermined intervals to remove deposition before it significantly reduces purification effectiveness. This proactive maintenance prevents the need for frequent, prolonged high-power operations that would substantially reduce engine output, thereby maintaining both purification reliability and power availability.
Solution Approach 2:
The controller executes removal control periodically rather than continuously, allowing the engine to operate at full output between maintenance cycles. This periodic approach ensures deposition is removed before it degrades purification performance while minimizing the total time engine output is reduced.
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
The system effectively removes deposition from the purification system without generating noise and vibrations, especially when carrying a passenger, while ensuring efficient particulate matter removal when the vehicle is operated autonomously without a passenger.
Implementation Method 1
The removal control may include a heating process to raise a temperature of the purification system by increasing an output power of the engine
Data Source
AI summary
A vehicle control system vehicle control system to remove deposition from the purification system without generating noises and vibrations is provided. The vehicle control system comprises a controller that operates the vehicle having an engine autonomously, and that removes deposition from a purification system. The controller is configured to: obtain an amount of deposition on the purification system; determine a presence of a passenger in the vehicle; and execute the removal control when an amount of the deposition on the purification system exceeds a threshold value. The threshold value includes a first threshold value used when the vehicle is propelled while carrying a passenger, and a second threshold value used when the vehicle is propelled autonomously without carrying a passenger that is smaller than the first threshold value.