Hybrid Vehicle GPF Regeneration Control via Soot Mass Estimation
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Solution Overview
Problem
Conventional hybrid vehicles inefficiently manage engine operation for both air conditioner and soot removal, leading to excessive fuel consumption by frequently turning the engine on and off, without effectively achieving the high inlet temperatures required for gasoline particulate filter regeneration.
Innovation Solution
A hybrid vehicle system that includes a gasoline particulate filter, sensors, and a controller to determine the necessity of engine operation based on soot mass, inlet temperature, and user inputs, optimizing engine operation for both air conditioner and soot removal by calculating the estimated soot mass and adjusting engine parameters like RPM, ignition timing, and air-conditioning ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the engine is frequently turned on and off to manage air conditioner operation, then the air conditioner can be operated, but fuel consumption increases and soot removal efficiency decreases
Solution Approach 1:
The patent combines air conditioner operation control with GPF regeneration control into a unified engine management system. When GPF regeneration is required, the system merges this requirement with air conditioner operation needs, allowing the engine to remain running for both purposes simultaneously, thereby avoiding additional engine startups and reducing fuel consumption.
Solution Approach 2:
The engine is designed to serve multiple functions: providing mechanical power for vehicle operation, driving the air conditioner compressor, and enabling GPF regeneration through controlled combustion. By making the engine multi-functional, the system avoids the energy penalty of频繁ly starting and stopping the engine for different purposes.
2Ease of operation
If the engine is turned on for air conditioner heating, then the air conditioner can operate, but the inlet temperature of GPF may not reach the required level for soot removal
Solution Approach 1:
The system implements feedback control by continuously monitoring GPF inlet temperature and adjusting engine operating parameters accordingly. When air conditioner heating is required, the controller monitors whether the GPF inlet temperature reaches the threshold for soot combustion (approximately 350°C), and adjusts engine RPM and load to ensure both air conditioner operation and adequate temperature for GPF regeneration.
Solution Approach 2:
The engine operating parameters (RPM, load, injection timing) are dynamically adjusted based on real-time conditions including air conditioner heating requirements and GPF soot accumulation levels. This dynamic control allows the system to optimize engine output to simultaneously satisfy air conditioner heating demands and maintain sufficient GPF inlet temperature for effective soot removal.
3Reliability
If the engine operation is optimized for soot removal, then GPF regeneration is achieved, but air conditioner operation may be compromised
Solution Approach 1:
The system changes engine operating parameters (RPM, injection timing, air-fuel ratio) to optimize for GPF regeneration when soot accumulation reaches critical levels. Simultaneously, the controller monitors air conditioner operation status and adjusts parameters to maintain adequate cooling capacity. The controller balances these competing requirements by selecting parameter sets that satisfy both soot removal thresholds and air conditioner performance requirements.
4Loss of energy
If the engine is turned off to improve fuel economy, then fuel consumption decreases, but the number of engine startups increases leading to additional fuel waste
Solution Approach 1:
The system performs preliminary assessment of GPF soot accumulation levels and predicts future regeneration needs. When the controller determines that GPF regeneration will be required soon, it proactively keeps the engine running or prevents shutdown, thereby avoiding the fuel penalty of frequent restarts while still maintaining fuel-efficient operation by coordinating with air conditioner demands.
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 reduces unnecessary engine startups, improves fuel economy by coordinating engine operations for simultaneous air conditioner and soot removal, ensuring efficient regeneration of the gasoline particulate filter and minimizing fuel waste.
Implementation Method 1
a gasoline particulate filter (GPF) configured to store a soot generated in an engine and burn the soot
Implementation Method 2
determine an inlet temperature of the GPF based on the second soot mass and a predetermined reference value
Implementation Method 3
a gasoline particulate filter (GPF) configured to store a soot generated in an engine and burn the soot
Data Source
AI summary
A vehicle is provided and includes a GPF (gasoline particulate filter) that is configured to store a soot generated in an engine and burn the soot and a sensor that is configured to detect a first soot mass included in the GPF. A controller is configured to calculate a second soot mass estimated at the ignition off based on the detected first soot mass and determine an inlet temperature of the GPF based on the second soot mass and a predetermined reference value. The engine is then operated based on the determined inlet temperature of the GPF.