Vehicle Cooling System Bubble Detection and Removal
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Solution Overview
Problem
Existing cooling systems for vehicles fail to effectively detect and remove bubbles in the coolant, leading to inefficient cooling performance and potential engine damage due to temperature increases and pressure changes.
Innovation Solution
A cooling system with a valve in the cooling channel and a controller that detects bubble production based on pressure changes, discharges bubbles by opening the valve when a predetermined rate of pressure change is met, and closes the valve when the pressure change exceeds a reference value or a predetermined time, ensuring efficient coolant circulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If bubbles are not removed from the cooling channel, then the cooling system structure remains simple, but cooling performance deteriorates and engine damage may occur
Solution Approach 1:
The system uses the existing pressure sensor and temperature sensor to detect bubble formation, and utilizes the existing valve structure for bubble discharge. The controller processes the sensor data and automatically controls the valve operation, making the system self-diagnosing and self-correcting without requiring additional specialized sensors or complex external control systems.
Solution Approach 2:
The bubble discharge function is extracted as a separate controllable operation from the normal cooling circulation. The valve is controlled to open only when bubbles are detected, separating the bubble removal function from the continuous cooling flow, allowing simple structure with targeted intervention.
2Reliability
If a valve is continuously open to discharge bubbles, then all bubbles can be removed, but coolant leakage and loss of cooling efficiency occur
Solution Approach 1:
The controller continuously monitors the pressure sensor and temperature sensor data to determine when bubbles are present and when they have been discharged. The valve is opened only during the period when bubbles are detected and closed when bubble discharge is complete, creating a closed-loop feedback control system that prevents unnecessary valve opening and coolant loss.
Solution Approach 2:
Instead of continuous valve opening, the system uses periodic or intermittent valve activation based on bubble detection. The valve opens for specific time periods when bubbles are present and closes when the cooling channel is clear, reducing coolant loss while maintaining effective bubble removal.
3Device complexity
If pressure sensor and temperature sensor data are used to detect bubbles, then specific bubble sensors are not needed, but detection accuracy must be maintained
Solution Approach 1:
The existing pressure sensor and temperature sensor, originally designed for general cooling system monitoring, are repurposed to detect bubble formation. By analyzing the relationship between pressure changes and temperature increases, the system achieves bubble detection functionality without requiring specialized bubble sensors, maintaining multi-functionality of existing components.
Solution Approach 2:
The controller acts as an intermediary that processes the indirect signals from pressure and temperature sensors to infer bubble presence. Rather than directly detecting bubbles, the system uses the relationship between pressure and temperature changes as an intermediate indicator to determine bubble formation, maintaining detection accuracy through computational analysis.
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
This solution allows for the detection and removal of bubbles without specific sensors, preventing cooling performance deterioration and maintaining engine efficiency by ensuring smooth coolant circulation.
Implementation Method 1
detect the generation of bubbles in the coolant using a rate of pressure change based on a temperature increase in the cooling channel
Data Source
AI summary
A cooling system for a vehicle is provided. The system includes a valve that is disposed at a predetermined position in a cooling channel to discharge bubbles produced in a coolant out of the cooling channel. Additionally, a controller is configured to detect whether bubbles have been produced in the coolant using a rate of pressure change based on a temperature increase in the cooling channel and open the valve in response to detecting that bubbles have been produced.