Piston cooling jet

Patent metadata

Field	Value
Publication number	US-2022010718-A1
Application number	US-202117369400-A
Country	US
Kind code	A1
Filing date	Jul 7, 2021
Priority date	Jul 8, 2020
Publication date	Jan 13, 2022
Grant date	—

Abstract

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.

First claim

What is claimed is:

1 . A piston cooling jet comprising:
a housing having an interior chamber that receives a fluid from an external source; 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; and a 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.

2 . The piston cooling jet of claim 1 , wherein the intersecting walls are orthogonally oriented with respect to each other.

3 . The piston cooling jet of claim 1 , wherein the nozzle extends from the conduit to an outlet and the intersecting walls are disposed in the nozzle upstream of the outlet, and the intersecting walls extend along the direction of the flow of the fluid over a length that is shorter than a distance that an end of the intersecting walls is located from the outlet of the nozzle along the direction of the flow of the fluid.

4 . The piston cooling jet of claim 1 , wherein the nozzle includes an internal channel that is fluidly coupled with the nozzle, the internal channel having a tapered section that is tapered along the direction of the flow of the fluid, and the intersecting walls are located upstream of the tapered section of the channel in the nozzle along the direction of the flow of the fluid.

5 . The piston cooling jet of claim 1 , wherein the housing and the conduit are a single, continuous body.

6 . The piston cooling jet of claim 1 , wherein the housing includes an inlet and an opposite fastener opening on opposite sides of the interior chamber, the housing configured to hold a ball and a resilient member in the interior chamber and to receive a guide pin into the interior chamber via the fastener opening, the resilient member and the ball configured to control a rate at which the fluid enters into the interior chamber of the housing via the inlet of the housing, and the guide pin has a length that controls the rate at which the fluid enters into the interior chamber of the housing.

7 . The piston cooling jet of claim 1 , wherein the housing includes an inlet through which the fluid is received into the housing, the housing also including a cantilevered beam extending from an interior surface of the housing toward the inlet, the cantilevered beam having a ball on an outer end of the cantilevered beam, the cantilevered beam and the ball positioned to control a rate at which the fluid enters into the interior chamber of the housing.

8 . The piston cooling jet of claim 7 , wherein the housing, the cantilevered beam, and the ball are a single body.

9 . The piston cooling jet of claim 1 , wherein the conduit is elongated and extends from an exterior surface of the housing at a non-orthogonal angle.

10 . The piston cooling jet of claim 1 , further comprising a planar flange coupled with the housing and configured to be coupled with a cylinder block of an engine, wherein the housing and the flange are a single body.

11 . A piston cooling jet comprising:
a single body housing and conduit, the housing having an interior chamber that receives a fluid from an external source, the 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; and a nozzle coupled with the conduit and positioned to direct flow of the fluid exiting from the conduit via the nozzle toward the underside of the engine piston head.

12 . The piston cooling jet of claim 11 , wherein the conduit is elongated and extends from an exterior surface of the housing at a non-orthogonal angle.

13 . The piston cooling jet of claim 11 , wherein the conduit includes only a single bend at an angle greater than forty-five degrees.

14 . The piston cooling jet of claim 11 , wherein the nozzle is a 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.

15 . The piston cooling jet of claim 11 , wherein the nozzle includes an internal channel that is fluidly coupled with the nozzle, the internal channel having a tapered section that is tapered along the direction of the flow of the fluid.

16 . The piston cooling jet of claim 11 , wherein the housing includes an inlet and an opposite fastener opening on opposite sides of the interior chamber, the housing configured to hold a ball and a resilient member in the interior chamber and to receive a guide pin into the interior chamber via the fastener opening, the resilient member and the ball configured to control a rate at which the fluid enters into the interior chamber of the housing via the inlet of the housing.

17 . The piston cooling jet of claim 11 , further comprising a planar flange coupled with the housing and configured to be coupled with a cylinder block of an engine.

18 . The piston cooling jet of claim 11 , wherein the housing includes an inlet through which the fluid is received into the housing, the housing also including a cantilevered beam extending from an interior surface of the housing toward the inlet, the cantilevered beam having a ball on an outer end of the cantilevered beam, the cantilevered beam and the ball positioned to control a rate at which the fluid enters into the interior chamber of the housing.

19 . A method comprising:
depositing a first layer of material for a piston cooling jet onto a build plate, the piston jet including a housing and an elongated conduit, the housing having an inlet and an interior chamber into which a fluid is received via the inlet, the conduit having a channel that is fluidly coupled with the interior chamber of the housing and that extends to a nozzle through which the fluid is directed out of the piston cooling jet; and depositing successive layers of the material onto the first layer to additively form the piston cooling jet, wherein the first layer and the successive layers of the material are deposited to form the conduit projecting from the housing at a downward angle toward the build plate and having a bend that angles the nozzle at an upward angle away from the build plate, wherein the first layer and the successive layers of the material are deposited to form vertical supports between the conduit and the build plate.

20 . The method of claim 19 , further comprising sintering the first layer and the successive layers of the material to form the piston cooling jet.

Assignees

• Transp Ip Holdings Llc

Inventors

• Heher Brett
• Hosur Mahantesh Mallappa
• Vaidyanathan Krishnamurthy
• Bailey Kevin Paul
• Sadananda Rao Sudeep Pradhan

Classifications

• Y02P10/25

  Process efficiency · CPC title

• F01M2001/083

  for lubricating cylinders · CPC title

• B22F7/08

  with one or more parts not made from powder {(B22F7/062 takes precedence)} · CPC title

• B22F5/008

  of engine cylinder parts or of piston parts other than piston rings (of piston rings B22F5/02) · CPC title

• B33Y10/00

  Processes of additive manufacturing · CPC title