Engine Control Function Prioritization During Injection Cut-Offs
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The reduction in fuel injection cut-offs due to new driving modes and hybrid vehicle technologies hampers the effective execution of critical internal combustion engine control functions, leading to incomplete performance of essential diagnostics and safety functions.
Innovation Solution
A method that determines a current kilometric window, target execution frequency, and required execution frequency for each control function, prioritizing their execution based on a pre-established hierarchy to ensure minimal impact on vehicle handling and full potential performance, allowing simultaneous execution of compatible functions while suspending lower-priority ones if necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If hybrid vehicle technology and automatic coasting mode are implemented, then fuel economy is improved, but the frequency of fuel injection cut-offs decreases
Solution Approach 1:
The control unit proactively manages the scheduling of control functions by predicting when fuel injection cut-offs will occur and preparing execution plans in advance. This allows the system to ensure that critical control functions are executed during available cut-off windows while maintaining the fuel economy benefits of hybrid technology and coasting modes.
Solution Approach 2:
The system dynamically adjusts the execution scheduling of control functions based on real-time conditions, including the frequency of fuel injection cut-offs, vehicle operating mode, and priority levels of different control functions. This dynamic scheduling ensures that control functions are executed optimally despite varying cut-off frequencies caused by hybrid and coasting operations.
2Productivity
If multiple control functions are executed simultaneously, then system productivity is improved, but control reliability decreases due to resource conflicts
Solution Approach 1:
The control unit segments control functions into different priority levels and executes them in a structured sequence during fuel injection cut-offs. Critical functions are executed first, followed by less critical functions, ensuring that resource conflicts do not compromise the reliability of essential control operations while still maximizing overall execution productivity.
Solution Approach 2:
The control unit acts as an intermediary that coordinates and manages the execution of multiple control functions during fuel injection cut-offs. It allocates execution resources, resolves conflicts between simultaneous function requests, and ensures that high-priority functions receive necessary resources, thereby maintaining both productivity and reliability.
Data Source
Figure 1
AI summary
The invention relates to a method for selectively executing engine control functions, each requiring an injection cut-off for its execution, characterized in that (1) a current mileage window to be covered is determined, and for each function, (2) a target execution frequency is determined, an average execution frequency is determined over all the windows covered, from their target frequency and their average execution frequency, (4) a required execution frequency is determined for the current window to be covered, (5) their current execution frequency is determined throughout the current window, (6) their current execution frequency is compared to their required frequency, (7) a requirement for execution of the control function is determined when their current execution frequency is lower than their required frequency, and between control functions in execution requirement,Their execution is carried out according to a pre-established hierarchy (8) of control functions.