Piston Cooling Valve With Pressure-Responsive Flow Adjustment
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Solution Overview
Problem
Existing piston cooling systems in internal combustion engines consume unnecessary drive power due to pressure losses in fluid pumps, especially when cooling requirements vary with engine power, leading to inefficient cooling and increased energy consumption.
Innovation Solution
A central valve system that adjusts cooling fluid flow based on fluid pressure, allowing the valve element to move and change the flow cross-section without causing pressure loss when fully open, and to increase or decrease flow as needed by responding to fluid pressure changes, thus optimizing cooling fluid delivery to pistons without unnecessary power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional valve is used to control cooling fluid flow, then the cooling flow can be adjusted, but pressure losses occur that consume unnecessary drive power from the fluid pump
Solution Approach 1:
The valve element is designed to be movable between a first position (fully open) and a second position (flow restriction), allowing dynamic adjustment of cooling flow based on actual cooling requirements. This dynamic positioning enables the valve to adapt to varying cooling demands while minimizing pressure losses when fully open, thereby reducing unnecessary drive power consumption from the fluid pump.
2Adaptability or versatility
If the valve element is positioned in the fluid channel to control flow, then flow adjustment is possible, but pressure loss occurs in the fluid channel
Solution Approach 1:
The valve element is designed to be extractable from the fluid channel. In the first position, the valve element is fully retracted from the fluid channel, allowing cooling fluid to flow through without any pressure loss. When flow control is needed, the valve element moves into the fluid channel to restrict flow. This extraction capability eliminates unnecessary pressure losses while maintaining flow control functionality.
3Productivity
If demand-based cooling is implemented, then cooling efficiency improves, but complex valve control mechanisms are required
Solution Approach 1:
The valve is designed to respond automatically to fluid pressure changes without requiring external control mechanisms. When the fluid pump delivers higher pressure (indicating higher engine output and cooling demand), the valve element is pushed into the fluid channel to increase flow restriction, allowing more cooling fluid through. When pressure decreases, the valve element retracts to reduce restriction. This self-service mechanism achieves demand-based cooling efficiency while avoiding complex control 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
The valve system ensures efficient piston cooling by adapting fluid flow to meet actual cooling needs, reducing energy consumption by minimizing pressure losses and maintaining optimal cooling capacity across varying engine speeds, thereby improving the overall efficiency of the cooling system.
Implementation Method 1
The movement of the valve element depends on the fluid pressure of the cooling fluid. The valve enables demand-based cooling of the pistons by opening depending on the fluid pressure of the cooling fluid.
Data Source
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AI summary
The invention relates to a valve (22) for adjusting the flow of cooling fluid from a fluid source (16) to several injection nozzles (24) for cooling several pistons (12) of an internal combustion engine. The valve (22) has a fluid channel (30) for connecting the fluid source (16) to the several injection nozzles (24). The valve (22) has a valve element (32) which is arranged to change the flow cross-section of the fluid channel (30), in particular to be displaceable. The valve element (32) is movable, in particular displaceable, into a first position in which the flow cross-section is unaffected by the valve element (3).