Hybrid Vehicle GPF Regeneration Clutch Control
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Solution Overview
Problem
Hybrid vehicles face challenges in efficiently performing gasoline particulate filter (GPF) regeneration, particularly due to frequent engine on/off cycles and varying driving conditions like uphill and downhill driving, which hinder the maintenance of optimal GPF regeneration temperature and time.
Innovation Solution
A control method for hybrid vehicles that determines driving environment conditions, including load, gradient, and outside temperature, to adjust the engine clutch state and operation conditions for efficient GPF regeneration, ensuring the unit operates while maintaining the determined clutch state, thereby optimizing regeneration in different driving scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the engine is frequently turned on and off to maximize fuel efficiency, then fuel efficiency is improved, but the ability to maintain optimal GPF regeneration temperature is worsened
Solution Approach 1:
The control method performs preliminary assessment of driving environment conditions (gradient, load, temperature) before initiating GPF regeneration. By predicting whether conditions will support regeneration, the system can proactively maintain engine operation when needed, rather than reacting after temperature drops. This allows fuel-efficient engine shutdowns while ensuring regeneration opportunities are captured in advance.
Solution Approach 2:
The system dynamically adjusts engine operation strategy based on real-time driving conditions. The clutch control is not fixed but adapts continuously to gradient, load, and temperature variations. This dynamic approach allows the engine to remain on during regeneration-critical conditions while shutting down during favorable conditions, resolving the contradiction between fuel efficiency and temperature maintenance.
2Reliability
If the engine clutch is disengaged during GPF regeneration, then regeneration can be performed, but the ability to respond to varying driving conditions is worsened
Solution Approach 1:
The control method implements continuous feedback monitoring of driving conditions (gradient, load, temperature) during GPF regeneration. The system assesses whether current conditions support regeneration and adjusts clutch engagement accordingly. This feedback mechanism ensures reliable regeneration initiation while maintaining adaptability to changing driving conditions throughout the process.
Solution Approach 2:
The system uses the vehicle's own driving conditions (gradient, load, temperature) to determine whether GPF regeneration should proceed. Rather than requiring external intervention or fixed schedules, the regeneration decision is self-determined based on real-time environmental assessment, enabling both reliability and adaptability.
3Productivity
If GPF regeneration is delayed to match favorable driving conditions, then regeneration efficiency is improved, but the accumulation of harmful soot is worsened
Solution Approach 1:
The system changes the threshold parameters for regeneration initiation based on driving conditions. Rather than using a fixed temperature or time threshold, the control method adjusts regeneration entry conditions according to gradient, load, and temperature parameters. This allows earlier regeneration initiation in favorable conditions, preventing soot accumulation while maintaining high regeneration efficiency when conditions permit.
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
This approach allows for more efficient GPF regeneration by varying the regeneration entry conditions based on driving environments, ensuring timely and effective soot burning, even in challenging conditions like uphill driving, thereby improving fuel efficiency and adhering to stringent exhaust gas regulations.
Implementation Method 1
The GPF is a device for storing soot generated during combustion and reducing soot using a burning method when a certain condition is satisfied
Data Source
AI summary
A hybrid vehicle includes an electric motor, an engine including an exhaust gas purifying unit, and an engine clutch disposed between the electric motor and the engine. A method of controlling the hybrid vehicle includes determining a driving environment condition including a first condition related to at least a driving load when a request for operating the exhaust gas purifying unit is received, determining a state of the engine clutch and an operation condition of the exhaust gas purifying unit when the exhaust gas purifying means operates according to the result of determining the driving environment condition, and operating the exhaust gas purifying unit while maintaining the determined state of the engine clutch when the driving environment condition is satisfied.