Engine Control System Using Correlation Data for Independent Parameter Management
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Solution Overview
Problem
Existing engine control systems face interference between performance parameters when calculating target values independently, leading to deviations from desired levels of combustion noise, smoke, and fuel consumption.
Innovation Solution
An engine control apparatus that uses correlation data to determine target values of common factors and combustion parameters, allowing for independent control of performance parameters by converting these values into command values for actuators, thereby eliminating mutual interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If target values of performance parameters are calculated independently and multiple controlled variables are changed simultaneously, then each parameter can reach its target value, but interference occurs between different performance parameters causing one parameter to deviate from its target value
Solution Approach 1:
The patent segments the control system into two distinct modules: a target value calculation module that computes independent target values for each performance parameter, and a controlled variable determination module that synthesizes these targets while accounting for parameter correlations. This segmentation allows independent calculation while preventing interference through coordinated adjustment of controlled variables.
Solution Approach 2:
The patent introduces an intermediary computational layer that processes the relationship between performance parameters and controlled variables. This intermediary module uses correlation data to determine how changes in controlled variables affect multiple performance parameters simultaneously, acting as a mediator that prevents direct interference between parameters while achieving their target values.
2Object-affected harmful factors
If the interval between pilot injection events is decreased to reduce combustion noise, then combustion noise level is improved, but the amount of smoke emitted from the engine increases
Solution Approach 1:
The patent changes multiple injection parameters simultaneously rather than adjusting a single parameter. By modifying fuel injection timing, injection quantity, and injection pressure in a coordinated manner based on their correlation relationships, the system reduces combustion noise while preventing smoke emission increase that would result from simple interval reduction.
Solution Approach 2:
The patent implements dynamic adjustment of injection parameters based on real-time engine operating conditions and measured performance. The control system continuously monitors combustion noise and smoke emission levels, adapting the injection strategy dynamically to maintain optimal balance between these conflicting parameters under varying engine loads and speeds.
Data Source
AI summary
An engine control system which may be used in automotive vehicles includes first correlation data representing correlations between performance parameters associated with different types of performances of a combustion engine and uncorrelated common factors existing among the performance parameters and second correlation data representing correlations between the common factors and combustion parameters associated with combustion states of fuel in the combustion engine. The engine control system determines target values of the common factors using the first correlation data and also determines target values of the combustion parameters using the second correlation data. The engine control system determines command values as a function of the target values of the combustion parameter and outputs them to actuators which control combustion states of fuel in the engine for achieving desired levels of the performances of the combustion engine. This enables the performance parameters to be controlled independently of each other without any interference.