Multi-Section Bore Cooling Nozzle for Non-Affine Oil Flow Control
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Solution Overview
Problem
Existing cooling nozzles for internal combustion engine pistons deliver oil flow at an affine rate with pressure, which does not optimize cooling and pump energy consumption, as they lack complex flow rate variation.
Innovation Solution
The cooling nozzle design features a bore with multiple sections that change in shape along the fluid flow direction, allowing the valve to define different passage sections, enabling non-affine flow rate variation based on pressure, thereby regulating oil flow effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a traditional cooling nozzle with a simple bore is used, then the structure is simple and easy to manufacture, but the flow rate varies in a fine manner with pressure which does not optimize cooling and pump energy consumption
Solution Approach 1:
The bore is divided into multiple sections (first section with first cross-sectional area, second section with second cross-sectional area) that have different geometries. This segmentation allows the valve to define different passage sections at different pressures, enabling non-affine flow rate variation that optimizes pump energy consumption while maintaining cooling effectiveness.
2Device complexity
If a valve with a simple bore is used, then the device complexity is low, but the flow rate variation is affine with pressure which does not optimize cooling performance
Solution Approach 1:
Different sections of the bore have different cross-sectional areas and geometries (first section with area S1, second section with area S2). This local quality variation allows the valve to regulate flow rate in a non-affine manner with pressure, optimizing cooling performance without requiring complex external control systems.
3Productivity
If the bore has multiple sections with different cross-sectional areas, then the flow rate can be optimized for cooling and energy consumption, but the manufacturing complexity increases
Solution Approach 1:
The multi-section bore is integrated directly into the valve body as a single component, merging the flow regulation function with the structural housing. This integration allows complex flow rate variation patterns to be achieved through precise bore geometry design without requiring multiple separate parts, thus optimizing cooling efficiency while managing manufacturing 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
This design achieves optimized cooling and reduced pump energy consumption by maintaining higher oil flow rates at specific pressures while minimizing oil consumption compared to traditional nozzles.
Implementation Method 1
a shutter (10) mounted movable in a bore (11) of the body (2) and a valve seat (12) formed in the bore (11), the shutter (10) being returned into contact against the valve seat (12) by an elastic means, formed, in the example shown, by a spring (14)
Implementation Method 2
Their role is to send pressurized oil from the engine's lubrication system under the pistons to cool them and prevent them from losing their mechanical properties
Data Source
Figure 1A~1C
Figure 1D~2A
Figure 2B~2C
AI summary
A cooling nozzle comprising a supply inlet (4), a discharge outlet (6), a bore (11) linking the inlet (4) and the outlet (6), the outlet having a given passage cross section, a valve (208) comprising a shutter (210) sliding in the bore (11) and bearing against a valve seat (212) in a closed state. The valve (208) comprises, beyond a first phase in which the shutter separates from the valve seat (212), two open states, having different ranges of fluid pressure values, each state having a passage cross section between the shutter (210) and the bore (11) that is different to that of the other state, one of said states having a passage cross section (S3) that regulates the fluid flow at the discharge outlet (6) and the other open state having a passage cross section such that the flow is regulated by the passage cross section (S2) of the outlet (6).