Coolant Control Valve with Bypass Temperature Detection
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Solution Overview
Problem
The existing coolant control valve systems fail to appropriately detect coolant temperature when in a closed state, leading to delayed temperature detection and potential engine overheating due to the temperature gap between the engine coolant and the thermal protection device, and the fail-safe valve's inability to promptly respond to temperature changes.
Innovation Solution
Incorporating a temperature detection medium that passes through the bypass channel, allowing for temperature detection even when the valve is closed, and using a rotary valve with a gear train power transmission mechanism to adjust flow rates and maintain constant rotation angles without electric power, ensuring the fail-safe valve can open to divert coolant to the radiator for cooling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the coolant control valve is in a closed state to promote warm-up, then the warm-up performance is improved, but the temperature detection is delayed and the fail-safe mechanism cannot respond timely
Solution Approach 1:
The patent divides the coolant passage into two separate passages: a main passage that passes through the coolant control valve and a bypass passage that bypasses the valve. This segmentation allows the temperature detection medium to detect coolant temperature through the bypass passage even when the main valve is closed, eliminating the temperature detection delay while maintaining warm-up performance.
Solution Approach 2:
The patent introduces a temperature detection medium as an intermediary substance that flows through the bypass passage. This medium carries temperature information from the engine to the thermal protection device, enabling timely temperature detection without requiring the main coolant flow to pass through the closed valve.
2Reliability
If the coolant control valve remains closed due to malfunction, then the engine warm-up is maintained, but the engine overheating risk increases
Solution Approach 1:
The patent provides a fail-safe mechanism through the thermal protection device and bypass passage that activates beforehand when the coolant control valve malfunctions. When the temperature detection medium detects excessive temperature, the thermal protection device automatically opens the bypass passage to divert coolant flow, preventing engine overheating before it occurs.
Solution Approach 2:
The patent establishes a feedback loop where the temperature detection medium continuously monitors coolant temperature and transmits this information to the thermal protection device. When the temperature exceeds the preset threshold, the thermal protection device receives feedback and automatically activates the bypass passage to cool the engine.
3Object-affected harmful factors
If a thermal protection device with fail-safe valve is added, then the overheating protection is improved, but the device complexity increases
Solution Approach 1:
The patent merges the temperature detection function and the fail-safe valve activation function into an integrated thermal protection device. The temperature detection medium, thermal protection device, and bypass passage work as a unified system, reducing overall complexity compared to having separate independent components.
Solution Approach 2:
The thermal protection device is designed as a self-activating system that automatically responds to temperature conditions without requiring external control. The temperature detection medium directly actuates the fail-safe valve through the thermal protection device, eliminating the need for additional sensors, controllers, or power sources.
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 enables timely detection and response to coolant temperature increases, preventing engine overheating by ensuring the coolant is diverted to the radiator for cooling, even if the main valve is malfunctioning, thus maintaining engine temperature stability.
Implementation Method 1
a temperature detection medium 42 that detects a temperature change of coolant
Implementation Method 2
the coolant is diverted to the radiator for cooling
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
A coolant control valve apparatus including a fail-safe valve which is opened when a coolant temperature of the engine due to a valve malfunction increases, without delaying the increase, is provided. The engine cooling system includes a main channel 4 which circulates coolant between an engine 1 and a radiator 3 and a bypass channel 5 which bypasses the radiator 3. The coolant control valve apparatus 10 includes a main valve 11 which adjusts a flow rate of the coolant in the main channel 4 to control the flow rate of the coolant in the main channel 4. Further, the coolant control valve apparatus 10 includes a detour channel 67 provided being diverged from the main channel 4 so as to detour the main valve 11. The coolant control valve apparatus 10 includes a valve main body 41 which opens and closes the detour channel 67 and a temperature detection medium 42 which can open and close the valve main body 41 according to a temperature of the coolant. The temperature detection medium 42 is disposed in the diverging part between the detour channel 67 and the bypass channel 5.