Dual Spray Piston Cooling Jet with Check Valve Flow Control
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Solution Overview
Problem
Existing piston cooling jet devices are inefficient in cooling the intake side of the piston, prone to manufacturing inconsistencies, and deplete the engine's oil supply during start-up due to lack of flow control.
Innovation Solution
A dual spray piston cooling jet device with multiple orifices and a check valve system that directs oil to both the exhaust and intake sides of the piston, integrated with the engine's oil supply system to control flow rates, reducing unnecessary oil consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single stream of oil is used to cool the piston, then the device structure is simple, but the cooling efficiency of the intake side portion is insufficient
Solution Approach 1:
The single oil stream is segmented into multiple streams through the use of a splitter component. The oil flow is divided into at least two separate streams that can be directed to different portions of the piston, including both the exhaust side and intake side, thereby improving cooling efficiency without requiring multiple external tubes
Solution Approach 2:
The invention introduces a new spatial dimension by directing oil streams at different angles and orientations toward the piston. The splitter directs oil streams in multiple directions (e.g., upward toward the exhaust side and sideways toward the intake side), utilizing three-dimensional space to achieve comprehensive cooling coverage
2Temperature
If external tubes or hoses are used for each oil stream, then multiple streams can be produced, but the device is prone to damage and manufacturing inconsistencies
Solution Approach 1:
Multiple oil streams are generated within a single integrated body rather than using separate external tubes or hoses. The splitter component, formed as an integral part of the device body, divides the oil flow into multiple streams internally, eliminating the need for multiple external tubes and thereby improving reliability and reducing manufacturing inconsistencies
Solution Approach 2:
The single body housing serves multiple functions: it contains the oil reservoir, provides the structural framework, and incorporates the splitter mechanism to generate multiple oil streams. This multi-functional design eliminates the need for separate external tubes while achieving comprehensive piston cooling
3Temperature
If oil is sprayed continuously during engine start-up, then cooling is provided, but the oil supply system is depleted and critical components are starved
Solution Approach 1:
The oil spray operation is made periodic rather than continuous through the incorporation of a valve mechanism. The valve opens to allow oil flow when the piston reaches specific positions in its cycle (when cooling is most needed) and closes at other times, thereby providing cooling only when necessary and conserving oil supply during engine start-up and low-flow conditions
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
Enhances cooling efficiency by directing oil precisely to both sides of the piston and conserves engine oil by controlling flow rates, preventing depletion during start-up.
Implementation Method 1
a check valve positioned and located in the fluid passageway
Implementation Method 2
spraying a stream of oil onto an underside of the piston head
Implementation Method 3
spraying a stream of oil onto an underside of the piston head
Data Source
AI summary
Piston cooling jet devices, or spray jet devices, for spraying oil onto an underside of a piston are provided. The spray jet devices may include two or more orifices such that oil is directed at an intake side portion and an exhaust side portion of the piston when the spray jet devices are selectively coupled to an engine. The spray jet devices may further include a valve to selectively control the flow of oil through a fluid passageway to the two or more orifices. For example, a check valve may be positioned and located such that the spray jet devices do not spray oil when the pressure of the oil system is less than a threshold value.