Engine Water Temperature Control via Variation Function Prediction
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Solution Overview
Problem
Current engine cooling systems experience significant lag, leading to fluctuations in water temperature, resulting in over or under adjustments, which affect oil consumption and emissions.
Innovation Solution
A method and apparatus that collect outlet water temperatures at predetermined intervals, determine the water temperature variation function, and adjust the cooling system's performance parameters to control controllable parts, ensuring accurate and quick stabilization of engine water temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the cooling system controls water temperature directly based on current temperature thresholds, then the control logic is simple, but the water temperature fluctuates back and forth due to system lag
Solution Approach 1:
The patent applies preliminary action by predicting future water temperature trends based on historical data and variation functions before the temperature actually reaches threshold values. The controller pre-adjusts controllable parts based on predicted temperature changes, preventing temperature fluctuations before they occur rather than reacting after thresholds are exceeded.
2Speed
If the cooling system uses threshold-based direct control, then the response time is fast, but the control accuracy is low leading to over or under adjustment
Solution Approach 1:
The patent implements feedback by continuously collecting water temperature data over time, analyzing temperature variation trends, and using this information to adjust control actions. The controller monitors historical temperature data, determines variation functions, and modifies control strategies based on actual temperature behavior, achieving both rapid response and high accuracy through continuous feedback loops.
Solution Approach 2:
The patent applies parameter changes by transitioning from static threshold-based control to dynamic control based on temperature variation functions. The system changes control parameters adaptively according to the determined temperature trends, adjusting control intensity and timing based on the rate and direction of temperature changes rather than fixed thresholds.
3Measurement precision
If the cooling system collects and analyzes temperature data over time, then the temperature control accuracy improves, but the control system complexity increases
Solution Approach 1:
The patent applies self-service by enabling the cooling system to automatically analyze its own temperature data, determine variation functions, and adjust its control strategy without external intervention. The system collects its own operational data, processes this information through the controller, and autonomously optimizes its control actions, reducing the need for complex external control mechanisms.
Data Source
AI summary
Provided is a method for controlling a water temperature of an engine. The method includes: collecting outlet water temperatures of the engine at predetermined time intervals (S101); when a number of the collected outlet water temperatures of the engine is greater than or equal to a predetermined number, determining a water temperature variation function of the outlet water temperatures of the engine with time according to collected each outlet water temperature of the engine and collection time corresponding to the each outlet water temperature of the engine (S102); and determining performance parameters of a cooling system under the water temperature variation function, and controlling controllable parts of the cooling system according to the performance parameters of the cooling system (S103). Further provided is an apparatus for controlling the water temperature of the engine.