Spherical Thermostatic Valve for Combustion Engine Flow Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing thermostatic valves for internal combustion engines with multiple connections are costly to produce and lack flexibility in controlling various flow positions, with previous designs being complex and prone to wear and pressure loss.
Innovation Solution
A thermostatic valve with a spherical segment or shell-shaped valve element featuring a single opening, a lubricious plastic sliding ring, and a toggle lever mechanism, along with flattened areas for solid collection and flow control, allowing for easy production, multiple switching positions, and reduced friction and pressure loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a complex valve element design with multiple openings is used, then flow control precision is improved, but manufacturing cost and device complexity increase
Solution Approach 1:
The valve element uses a spherical design that rotates about an axis to dynamically control flow distribution. By rotating the spherical valve element between end positions and intermediate positions, the system achieves variable flow control precision without requiring multiple fixed openings, thereby reducing manufacturing complexity while maintaining functional precision.
Solution Approach 2:
The single spherical valve element with rotating capability performs multiple flow control functions that would otherwise require separate valve components. It can control flow to the radiator, bypass, and mix both flows simultaneously by adjusting its rotational position, eliminating the need for multiple specialized openings and reducing overall device complexity.
2Ease of manufacture
If a spherical valve element with single opening is used, then manufacturing cost is reduced, but flow control versatility may be limited
Solution Approach 1:
The spherical valve element compensates for having a single opening by utilizing rotational movement. As the sphere rotates about its axis, the single opening dynamically aligns with different connection points (radiator connection, bypass connection, machine connection), providing flow control versatility equivalent to multiple fixed openings but with simpler manufacturing.
Solution Approach 2:
The invention transitions from a two-dimensional planar valve design with multiple openings to a three-dimensional spherical design with rotational freedom. This dimensional change allows a single opening on the sphere to access multiple flow paths through rotation, achieving versatility without increasing manufacturing complexity.
3Reliability
If sliding ring sealing arrangement is used, then sealing effectiveness is improved, but friction and wear increase
Solution Approach 1:
The sealing arrangement uses an elastomeric sealing ring as an intermediary between the sliding ring and the spherical valve element. This elastomeric ring deforms to accommodate surface irregularities, maintaining effective sealing while reducing direct friction and wear between the sliding ring and valve element, thereby extending service life.
Solution Approach 2:
The sealing arrangement combines different materials with complementary properties: a sliding ring made of low-friction plastic for reduced wear, and an elastomeric sealing ring for flexibility and sealing effectiveness. This composite material approach balances sealing performance with friction reduction to extend component life.
4Object-affected harmful factors
If flattened areas are added to spherical valve element, then solid particle collection is improved, but manufacturing complexity increases
Solution Approach 1:
The spherical valve element incorporates localized flattened areas at specific positions rather than changing the entire spherical geometry. These localized modifications create collection pockets for solid particles without significantly complicating the overall spherical shape, allowing standard spherical manufacturing processes to be used with minimal additional complexity.
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
The solution enables cost-effective production, increased longevity, and precise control of flow positions with reduced wear and pressure loss, enhancing the valve's operational efficiency and service life.
Implementation Method 1
an elastomeric sealing ring (12) which preloads the sliding ring (11) against the spherical valve element (6)
Implementation Method 2
a sliding ring (11) made of a low-friction plastic, in particular polytetrafluoroethylene
Data Source
Figure 1
Figure 2~4
Figure 5~6
AI summary
The thermostatic valve (1) has a housing (2) with three ports, namely an engine port (3) for connection to an engine cooling system, a radiator connection (5) for connection to a condenser and a bypass connection (4) for connection to a bypass. A hollow ball-shaped valve element (6) rotatable around an axis of rotation (7) in the housing is rotatably supported between two end positions. The valve element is designed as a spherical segment- or spherical shell, and has a single opening (8).