Fluid Supply System Bypass Valve Control
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Solution Overview
Problem
Existing fluid supply systems for internal combustion engines, particularly those with bypass circuits, are complex, expensive, and have slow switching due to reliance on temperature-dependent expansion elements like bimetallic or SMA switches, which require significant temperature differences and are inefficient in cold states.
Innovation Solution
A fluid supply system utilizing a solenoid valve to control a leakage channel, influencing pressure conditions to rapidly adjust the bypass valve, allowing quick switching without direct actuation of the valve body, thus enabling rapid fluid flow adjustments based on spring force and fluid pressure differences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If temperature-dependent expansion elements (bimetallic or SMA switches) are used to control the bypass valve, then the system provides temperature-based fluid flow control, but the switching speed is slow and the device complexity increases
Solution Approach 1:
The patent replaces temperature-dependent mechanical expansion elements (bimetallic or SMA switches) with an electronically controlled solenoid valve actuator. This substitution enables rapid switching response while reducing mechanical complexity, as the solenoid can be precisely controlled by electrical signals rather than relying on slow thermal expansion mechanisms.
Solution Approach 2:
The patent introduces a solenoid valve as an intermediary device between the control system and the bypass valve mechanism. The solenoid receives electrical control signals and translates them into rapid mechanical motion to actuate the bypass valve, thereby achieving fast switching without requiring complex temperature-sensing and mechanical-expansion systems.
2Reliability
If wax expansion elements are used in the bypass valve, then temperature-based bypass control is achieved, but a temperature difference of at least 10 Kelvin is required and switching inertia is introduced
Solution Approach 1:
The patent replaces wax expansion elements with an electronically controlled solenoid valve actuator. This substitution eliminates the need for 10 Kelvin temperature differences and removes switching inertia, as the solenoid can respond instantaneously to electrical control signals, ensuring rapid and reliable lubrication control.
3Ease of operation
If the valve body directly actuates the bypass valve, then precise control is achieved, but a large valve stroke is required which complicates the valve design
Solution Approach 1:
The patent segments the control function into two separate components: a solenoid valve with small stroke that controls fluid pressure, and a bypass valve that responds to pressure changes. This segmentation allows each component to be optimized independently - the solenoid requires minimal stroke for precise electrical control, while the bypass valve simply responds to pressure differential changes without requiring complex actuation mechanisms.
Solution Approach 2:
The patent uses fluid pressure as an intermediary between the solenoid valve and the bypass valve. The solenoid controls pressure in a control chamber, and this pressure differential automatically actuates the bypass valve through a simple pressure-responsive mechanism, eliminating the need for direct mechanical coupling and large valve strokes.
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 provides a structurally simple, cost-effective, and fast-switching bypass valve system that ensures adequate lubrication in both cold and warm states, overcoming the inefficiencies of traditional temperature-dependent expansion elements by allowing rapid pressure adjustments and minimizing valve stroke requirements.
Implementation Method 1
a valve (15), in particular a solenoid valve, which is designed in such a way that it can be switched on and off
Implementation Method 2
A spring element (13) is arranged in the second chamber (11), which biases the valve body (8) into its second position
Implementation Method 3
The valve body (8) is adjustable between a first position (compare FIGS. 1 and 3) and a second position (compare FIGS. 2 and 4), and in the first position it closes off the fluid channel (21) to component (5) and, in the second position, closes off the bypass channel (22)
Data Source
Figure 1~2
Figure 3~4
AI summary
The invention relates to a fluid supply system (1). The invention provides – a bypass valve (7) arranged in a control channel (6) and having a valve body (8) which can be adjusted between a first and a second position, – wherein the valve body (8) divides the control channel (6) into a first and a second space (10, 11) and has a leakage opening (12) that connects the first space (10) to the second space (11), – wherein a spring element (13) is arranged in the second space (11) and preloads the valve body (8) toward its second position, – wherein the second space (11) is connected to a fluid reservoir (9) via a leakage channel (14), – wherein a switchable valve (15) for at least partially opening/closing the leakage channel (14) is arranged in the leakage channel (14), – there being provided a detection device (16) and a control device (18) which close the valve (15) when a predefined state is reached, thus blocking the leakage channel (14).