Engine Control Apparatus for Filter Regeneration During Cabin Heating
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Solution Overview
Problem
Existing engine control systems for particulate matter filter regeneration interrupt fuel cutoff during vehicle compartment heating, potentially preventing filter regeneration even when the compartment is in a comfortable state, leading to incomplete regeneration.
Innovation Solution
An engine control apparatus that adjusts fuel cutoff control based on cooling water temperature and air mix door opening degree, allowing for continued filter regeneration during vehicle compartment heating by interrupting fuel cutoff when specific temperature conditions are met and resuming it when conditions return to normal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fuel cutoff control is always interrupted during vehicle compartment heating regardless of comfort state, then heating capability is maintained, but filter regeneration cannot be performed during heating
Solution Approach 1:
The control system dynamically adjusts the fuel cutoff control strategy based on real-time monitoring of cooling water temperature changes and air mix door opening degree. The system transitions from a static interruption policy to a dynamic decision-making process that evaluates current operating conditions, allowing fuel cutoff control to be maintained when the vehicle compartment remains comfortable and interrupting only when necessary to preserve heating capability.
Solution Approach 2:
The system monitors changes in cooling water temperature as a key parameter to determine whether to maintain or interrupt fuel cutoff control. By tracking the temperature difference between the start of fuel cutoff control and current temperature, along with the air mix door opening degree, the system adjusts its control strategy based on quantitative parameter thresholds, enabling filter regeneration when temperature changes remain within acceptable ranges.
2Productivity
If fuel cutoff control is maintained during vehicle compartment heating, then filter regeneration can be performed, but heating capability may deteriorate
Solution Approach 1:
The control system continuously monitors cooling water temperature and air mix door opening degree during fuel cutoff control, using this feedback information to determine whether to maintain or interrupt the control strategy. When the cooling water temperature decrease exceeds a predetermined threshold or the air mix door opening degree indicates insufficient heating capacity, the system interrupts fuel cutoff control to preserve heating capability, otherwise maintains it to enable filter regeneration.
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
Enables extended filter regeneration during vehicle compartment heating while maintaining passenger comfort by optimizing fuel cutoff control based on cooling water temperature and air conditioning settings, ensuring effective particulate matter burning.
Implementation Method 1
stop fuel supply to the engine and feed high temperature air to the filter in order to burn particulate matter accumulated on the filter
Implementation Method 2
an air conditioner which is equipped with an air mix door for opening and closing a channel through which air heated by cooling water for the engine flows
Data Source
AI summary
During operation under fuel cutoff control, the fuel cutoff control is interrupted when a decrease in temperature of cooling water from a temperature of cooling water that is detected at a start of the fuel cutoff control reaches or exceeds a second specified value under conditions that a degree of opening of an air mix door is greater than or equal to a predetermined opening degree and that a temperature setting is not raised in an operation unit.