Damper for piston and piston pin, for ice engines

Patent metadata

Field	Value
Publication number	US-10393265-B2
Application number	US-201715786791-A
Country	US
Kind code	B2
Filing date	Oct 18, 2017
Priority date	Oct 18, 2017
Publication date	Aug 27, 2019
Grant date	Aug 27, 2019

Abstract

A piston pin assembly is provided including a cylindrical pin body having a hollow interior. A mass is disposed in the hollow interior of the cylindrical pin body and a viscoelastic, plastic, or elastomeric material is disposed in the hollow interior between the mass and the cylindrical pin body. The mass and viscoelastic, plastic, and elastomeric material provides a damper for the piston and piston pin to delay the acceleration of piston lateral motion and stabilize the piston rotation and reduce the noise and friction.

First claim

What is claimed is:

1. A piston pin assembly, comprising:
a cylindrical pin body having a hollow interior;
a mass disposed in the hollow interior of the cylindrical pin body;
one of a viscoelastic, plastic, or elastomeric material without oriented fiber reinforcement disposed in the hollow interior between the mass and the cylindrical pin body, such that the mass and the one of a viscoelastic, plastic, or elastomeric material act as a mass and spring damper mechanism, wherein the cylindrical pin body includes a pair of interior shoulders on opposite sides of the elastomeric material.

2. The piston pin assembly according to claim 1 , wherein the mass is cylindrical in shape.

3. The piston pin assembly according to claim 1 , wherein the mass is made from metal.

4. A piston pin assembly, comprising:
a cylindrical pin body having a hollow interior;
a mass disposed in the hollow interior of the cylindrical pin body;
one of a viscoelastic, plastic, or elastomeric material disposed in the hollow interior between the mass and the cylindrical pin body; and
wherein the mass is spherical in shape.

5. A piston pin assembly, comprising:
a cylindrical pin body having a hollow interior;
a mass disposed in the hollow interior of the cylindrical pin body;
one of a viscoelastic, plastic, or elastomeric material without oriented fiber reinforcement disposed in the hollow interior between the mass and the cylindrical pin body, such that the mass and the one of a viscoelastic, plastic, or elastomeric material act as a mass and spring damper mechanism, wherein the elastomeric material includes a first layer of one of a viscoelastic, plastic, or elastomeric material and a second layer of viscoelastic, plastic, or elastomeric material, wherein the second layer of viscoelastic, plastic, or elastomeric material is softer than the first layer of one of a viscoelastic, plastic, or elastomeric material.

6. The piston pin assembly according to claim 5 , wherein the second layer of one of a viscoelastic, plastic, or elastomeric material is disposed between the mass and the first layer of one of a viscoelastic, plastic, or elastomeric material.

7. The piston pin assembly according to claim 5 , wherein the second layer of one of a viscoelastic, plastic, or elastomeric material is disposed between the cylindrical pin body and the first layer of one of a viscoelastic, plastic, or elastomeric material.

8. A piston pin assembly, comprising:
a cylindrical pin body having a hollow interior;
a mass disposed in the hollow interior of the cylindrical pin body;
one of a viscoelastic, plastic, or elastomeric material disposed in the hollow interior between the mass and the cylindrical pin body; and
wherein the one of a viscoelastic, plastic, or elastomeric material includes a first layer of one of a viscoelastic, plastic, or elastomeric material, a second layer of one of a viscoelastic, plastic, or elastomeric material and a third layer of one of a viscoelastic, plastic, or elastomeric material, wherein the second layer of one of a viscoelastic, plastic, or elastomeric material is disposed between the first and second layers of one of a viscoelastic, plastic, or elastomeric material and the second layer of one of a viscoelastic, plastic, or elastomeric material is relatively softer than the first and third layers of one of a viscoelastic, plastic, or elastomeric material.

9. A piston assembly, comprising:
a piston body having a crown and a skirt extending from the crown; and
a piston pin assembly including a cylindrical body having a hollow interior, a mass disposed in the hollow interior of the cylindrical body, and one of a viscoelastic, plastic, or elastomeric material without oriented fiber reinforcement disposed in the hollow interior between the mass and the cylindrical body, such that the mass and the one of a viscoelastic, plastic, or elastomeric material act as a mass and spring damper mechanism, wherein the cylindrical pin body includes a pair of interior shoulder on opposite sides of the one of a viscoelastic, plastic, or elastomeric material.

10. The piston assembly according to claim 9 , wherein the mass is cylindrical in shape.

11. The piston assembly according to claim 9 , wherein the mass is made by metal.

12. A piston assembly, comprising:
a piston body having a crown and a skirt extending from the crown; and
a piston pin assembly including a cylindrical body having a hollow interior, a mass disposed in the hollow interior of the cylindrical body, and one of a viscoelastic, plastic, or elastomeric material disposed in the hollow interior between the mass and the cylindrical body; and
wherein the mass is spherical in shape, wherein the cylindrical pin body includes a pair of interior shoulders on opposite sides of the one of a viscoelastic, plastic, or elastomeric material.

13. A piston assembly, comprising:
a piston body having a crown and a skirt extending from the crown; and
a piston pin assembly including a cylindrical body having a hollow interior, a mass disposed in the hollow interior of the cylindrical body, and one of a viscoelastic, plastic, or elastomeric material disposed in the hollow interior between the mass and the cylindrical body; and
wherein the mass is spherical in shape, wherein the one of a viscoelastic, plastic, or elastomeric material includes a first layer of one of a viscoelastic, plastic, or elastomeric material and a second layer of one of a viscoelastic, plastic, or elastomeric material, wherein the first layer of one of a viscoelastic, plastic, or elastomeric material is softer than the second layer of one of a viscoelastic, plastic, or elastomeric material.

14. The piston assembly according to claim 13 , wherein the second layer of one of a viscoelastic, plastic, or elastomeric material is disposed between the mass and the first layer of one of a viscoelastic, plastic, or elastomeric material.

15. The piston assembly according to claim 13 , wherein the second layer of one of a viscoelastic, plastic, or elastomeric material is disposed between the cylindrical pin body and the first layer of one of a viscoelastic, plastic, or elastomeric material.

16. A piston assembly, comprising:
a piston body having a crown and a skirt extending from the crown; and
a piston pin assembly including a cylindrical body having a hollow interior, a mass disposed in the hollow interior of the cylindrical body, and one of a viscoelastic, plastic, or elastomeric material disposed in the hollow interior between the mass and the cylindrical body; and
wherein the elastomeric material includes a first layer of one of a viscoelastic, plastic, or elastomeric material, a second layer of one of a viscoelastic, plastic, or elastomeric material and a third layer of one of a viscoelastic, plastic, or elastomeric material, wherein the second layer of one of a viscoelastic, plastic, or elastomeric material is disposed between the first and second layers of one of a viscoelastic, plastic, or elastomeric material and the second layer of one of a viscoelastic, plastic, or elastomeric material is relatively softer than the first and third layers of one of a viscoelastic, plastic, or elastomeric material.

Assignees

• Gm Global Tech Operations Llc

Inventors

• Germano Francesco

Classifications

• F16F15/02

  Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems ({F16F15/005 takes precedence } ; layered products B32B; suppression of vibration in ships B63; {relieving load on bearings, using magnetic means F16C39/06}) · CPC title

• F16J1/16 Primary

  with gudgeon-pin; Gudgeon-pins · CPC title

• F16F7/108

  on plastics springs · CPC title

• F16F15/127

  using plastics springs combined with other types of springs · CPC title

• F02F3/0069

  the crown and skirt being interconnected by the gudgeon pin · CPC title