Thermostatic Valve Contactless Position Monitoring
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Solution Overview
Problem
Existing thermostatic valves for internal combustion engine coolant temperature control lack a simple and reliable method to monitor the position of the main valve, which is crucial for detecting functional capability and potential malfunctions.
Innovation Solution
A contactless monitoring device is integrated into the thermostatic valve, utilizing a sensor element and a permanent magnet to generate a magnetic field, allowing the engine control unit to detect the open or closed position of the main valve through signal changes, with components such as Hall sensors and capacitors for precise measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a contactless monitoring device with sensor element and permanent magnet is integrated into the thermostatic valve, then the reliability of valve position detection is improved, but the device complexity increases
Solution Approach 1:
The patent replaces mechanical contact-based position detection with a contactless magnetic field-based sensor system. The permanent magnet attached to the moving valve component generates magnetic field changes that are detected by the sensor element, eliminating the need for mechanical contacts and improving reliability while maintaining a relatively simple structure.
Solution Approach 2:
The patent introduces a permanent magnet as an intermediary carrier that transfers positional information from the moving valve component to the stationary sensor element. This intermediary enables contactless communication of position data through magnetic field variations, solving the contradiction between reliable detection and device simplicity.
2Reliability
If electronic components are protected from coolant and moisture, then the reliability of the monitoring device is improved, but the device complexity increases
Solution Approach 1:
The patent introduces a protective barrier as an intermediary between the electronic components and the coolant environment. This barrier prevents direct contact between coolant/moisture and sensitive electronics, ensuring reliable operation without requiring complex active protection systems.
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
Enables reliable, contactless monitoring of the main valve position, facilitating early detection of malfunctions and ensuring the thermostatic valve operates correctly, while maintaining a modular, compact, and cost-efficient design with reliable protection of electronic components from coolant and moisture.
Implementation Method 1
at least one associated permanent magnet for generating a magnetic field to which the sensor element is exposed
Implementation Method 2
The at least one sensor element may be formed by a Hall sensor
Data Source
AI summary
A thermostatic valve for controlling the temperature of the coolant in an internal combustion engine controls the flow of coolant between the internal combustion engine and a heat exchanger. The valve includes an actuation element which functions in a temperature-dependent manner for actuating lift of a main valve and of a bypass valve in a valve housing. The actuation element has a stationary piston supported on a valve housing part. A housing can be displaced relative to the piston and on which the valve members of the main valve and of the bypass valve are arranged. Further provided is a monitoring device for the position of the main valve, which works in a contactless manner and which has at least one sensor element contained in the valve housing part, and at least one associated permanent magnet for generating a magnetic field to which the sensor element is exposed.