Engine Intake Control Using Multi-Parameter Map Functions

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Solution Overview

Problem

Existing engine intake system control devices using gain scheduling control struggle to generate optimum PID gains corresponding to multiple engine statuses, as map functions based on engine rotation number and fuel injection quantity fail to produce ideal PID gains for varying conditions.

Innovation Solution

An engine intake system control device that uses map functions inputting fuel injection pressure, fresh air flow, and compressor outlet temperature to output control gains, and a control unit that inputs these gains and a deviation to control the intake system, allowing for precise manipulation of the turbine vane opening degree to achieve ideal PID gains for different statuses.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If map functions use engine rotation number and fuel injection quantity as factors, then the control system can determine status factors, but it cannot generate optimum PID gains for multiple statuses

Engineering Contradiction:

Improveability to generate PID gains for multiple statusesVSAvoidprecision of PID gain generation

Core Design Contradiction:

Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

The patent changes the input parameters of the map function from engine rotation number and fuel injection quantity to fresh air flow rate, compressor outlet temperature, and fuel injection pressure. This parameter transformation enables the system to distinguish between different engine statuses (natural aspiration vs. supercharging) and generate appropriate PID gains for each status, thereby improving both adaptability and precision simultaneously

Inventive Principle:

Principle #35Parameter changes

2Device complexity

If fixed engine rotation number and fuel injection quantity are used, then the control factors are simplified, but PID gains cannot be generated for varying engine statuses

Engineering Contradiction:

Improvesimplicity of control factorsVSAvoidability to handle multiple engine statuses

Core Design Contradiction:

Device complexityVSAdaptability or versatility

Solution Approach 1:

The patent introduces dynamic parameter selection based on engine status. The control unit determines whether the engine is in natural aspiration or supercharging status and dynamically selects different map functions accordingly. This dynamic approach maintains simple control factor structure while achieving high adaptability to different engine statuses

Inventive Principle:

Principle #15Dynamics

3Ease of manufacture

If conventional map functions are used with limited input factors, then the control system is easier to implement, but control precision deteriorates

Engineering Contradiction:

Improveease of implementation of control systemVSAvoidprecision of control gain output

Core Design Contradiction:

Ease of manufactureVSManufacturing precision

Solution Approach 1:

The patent segments the control system into multiple map functions, each dedicated to a specific engine status (natural aspiration or supercharging). This segmentation allows each map function to be optimized for its specific status, improving precision while maintaining ease of implementation through modular design

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS11988162B2Engine intake system control device and control method thereof

Publication Date: 2024.05.21 TRANSTRON INC

AI summary

An engine intake system control device configured to control an intake system of an engine, having a map function that inputs at least a fuel injection pressure of the engine, a fresh air flow, and a compressor outlet temperature of a supercharger, and outputs a control gain; and a control unit that inputs the control gain and a deviation between a controlled variable of the intake system of the engine and a target value thereof, and controls a manipulated variable of the intake system of the engine.