Additive Piston Cooling Jet with Bent Conduit

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Solution Overview

Problem

Current piston cooling jet systems in internal combustion engines face complexity and cost issues due to complex geometries, leading to deformation and oil jet deviation during manufacturing, which affects the efficiency of the cooling fluid delivery.

Innovation Solution

The use of additive manufacturing to create a single-piece piston cooling jet with a bent conduit and flow straightening nozzle, reducing complexity and deformation, and enhancing the alignment and delivery of the cooling fluid.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Shape

If traditional manufacturing methods with multiple components and brazing are used, then complex geometries can be achieved, but manufacturing time and expense increase, and deformation occurs causing jet orientation alteration

Engineering Contradiction:

Improvecomplex geometryVSAvoidmanufacturing time

Core Design Contradiction:

ShapeVSProductivity

Solution Approach 1:

The patent combines multiple separate components (housing, conduit, nozzle) into a single integrated cooling jet assembly manufactured via additive manufacturing. This eliminates the need for brazing or press-fitting multiple parts together, reducing manufacturing steps and time while maintaining the complex geometry required for effective cooling fluid delivery.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The invention changes the manufacturing method from traditional subtractive or assembly-based approaches to additive manufacturing. This parameter change enables direct formation of complex internal geometries and bent conduit paths without requiring multiple assembly steps, thereby reducing manufacturing time and eliminating deformation issues associated with brazing.

Inventive Principle:

Principle #35Parameter changes

2Shape

If traditional manufacturing methods with brazing are used, then complex geometries can be achieved, but material strength decreases and deformation occurs

Engineering Contradiction:

Improvecomplex geometryVSAvoidmaterial strength

Core Design Contradiction:

ShapeVSStrength

Solution Approach 1:

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

Inventive Principle:

Principle #35Parameter changes

3Reliability

If complex geometries are used, then cooling fluid delivery can be optimized, but manufacturing complexity increases

Engineering Contradiction:

Improvecooling fluid deliveryVSAvoidmanufacturing complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

Inventive Principle:

Principle #35Parameter changes

4Shape

If brazing is used to assemble components, then complex geometries can be achieved, but manufacturing cost increases

Engineering Contradiction:

Improvecomplex geometryVSAvoidmanufacturing cost

Core Design Contradiction:

ShapeVSEase of manufacture

Solution Approach 1:

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS11674431B2Piston cooling jet

Publication Date: 2023.06.13 TRANSPORTATION IP HOLDINGS LLC

AI summary

A piston cooling jet is provided that may include a housing having an interior chamber that receives a fluid from an external source, and a conduit coupled with the housing and fluidly coupled with the interior chamber, the conduit having a bent shape to direct the fluid from the interior chamber of the housing toward an underside of an engine piston head. The piston cooling jet may also include a flow straightening nozzle coupled with the conduit and positioned to straighten flow of the fluid exiting from the conduit via the nozzle toward the underside of the engine piston head, the flow straightening nozzle having internal intersecting walls that intersect along a direction of the flow of the fluid in the conduit and out of the flow straightening nozzle.