Cylinder liner

Patent metadata

Field	Value
Publication number	US-2022106923-A1
Application number	US-202017064810-A
Country	US
Kind code	A1
Filing date	Oct 7, 2020
Priority date	Oct 7, 2020
Publication date	Apr 7, 2022
Grant date	—

Abstract

An annular cylinder liner includes an annular body defining a longitudinal axis, a radial direction perpendicular to the longitudinal axis, a circumferential direction, a first longitudinal end, a second longitudinal end, and a liner length measured from the first longitudinal end to the second longitudinal end along the longitudinal axis. The annular body also includes a shoulder that is disposed at the first longitudinal end, defining a shoulder axial thickness measured along the longitudinal axis. A ratio of the liner length to the shoulder axial thickness ranges from 24.0 to 46.0.

First claim

1 . An annular cylinder liner comprising:
an annular body defining a longitudinal axis, a radial direction perpendicular to the longitudinal axis, a circumferential direction, a first longitudinal end, a second longitudinal end, and a liner length measured from the first longitudinal end to the second longitudinal end along the longitudinal axis, the annular body including
a shoulder that is disposed at the first longitudinal end, defining a shoulder axial thickness measured along the longitudinal axis; and
wherein a ratio of the liner length to the shoulder axial thickness ranges from 24.0 to 46.0, and the annular cylinder liner further includes a radially thin portion disposed at the second longitudinal end, the radially thin portion defining a thin radial thickness measured along the radial direction ranging from 3.0 mm to 5.0 mm, and the annular body lacks internal voids.

2 . The annular cylinder liner of claim 1 wherein the shoulder axial thickness ranges from 6.0 mm to 12.0 mm.

3 . The annular cylinder liner of claim 1 wherein the liner length ranges from 246.0 mm to 271.0 mm.

4 . The annular cylinder liner of claim 1 further including an outer circumferential surface that defines a large diameter portion disposed axially adjacent the shoulder, and the shoulder protrudes a radial distance measured along the radial direction from the outer circumferential surface that ranges from 3.0 mm to 7.0 mm.

5 . The annular cylinder liner of claim 1 further defining an inner bore that extends from the first longitudinal end to the second longitudinal end.

6 . The annular cylinder liner of claim 5 wherein the inner bore defines a continuous cylindrical surface that extends from the first longitudinal end to the second longitudinal end, defining an inner diameter that ranges from 140.0 mm to 150.0 mm.

7 . The annular cylinder liner of claim 1 wherein the large diameter portion defines a varying large diameter that ranges from 150.0 mm to 160.0 mm, forming a first plurality of steps or rings, and a large diameter axial length measured along the longitudinal axis that ranges from 188.0 mm to 195.0 mm.

8 . The annular cylinder liner of claim 7 further comprising a small diameter portion that extends from the large diameter portion to the second longitudinal end, the large diameter axial length being measured along the longitudinal axis from the shoulder to the small diameter portion, the small diameter portion defining a varying small portion diameter that ranges from 145.0 mm to 155.0 mm, forming a second plurality of steps or rings, and a small diameter portion axial length measured along the longitudinal axis from the large diameter portion to the second longitudinal end that ranges from 55.0 mm to 80.0 mm.

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21 . An annular cylinder liner comprising:
an annular body defining a longitudinal axis, a radial direction perpendicular to the longitudinal axis, a circumferential direction, a first longitudinal end, a second longitudinal end, and a liner length measured from the first longitudinal end to the second longitudinal end along the longitudinal axis, the annular body including a shoulder that is disposed at the first longitudinal end, defining a shoulder axial thickness measured along the longitudinal axis; and the annular cylinder liner further include a radially thin portion disposed at the second longitudinal end, the radially thin portion defining a thin radial thickness measured along the radial direction ranging from 3.0 mm to 5.0 mm; wherein the annular body lacks an internal water jacket void.

22 . The annular cylinder liner of claim 21 wherein a ratio of the liner length to the shoulder axial thickness ranges from 24.0 to 46.0.

23 . The annular cylinder liner of claim 22 wherein the shoulder axial thickness ranges from 6.0 mm to 12.0 mm.

24 . The annular cylinder liner of claim 23 wherein the liner length ranges from 246.0 mm to 271.0 mm.

25 . The annular cylinder liner of claim 24 further including an outer circumferential surface that defines a large diameter portion disposed axially adjacent the shoulder, and the shoulder protrudes a radial distance measured along the radial direction from the outer circumferential surface that ranges from 3.0 mm to 7.0 mm.

26 . The annular cylinder liner of claim 25 further defining an inner bore that extends from the first longitudinal end to the second longitudinal end.

27 . An annular cylinder liner comprising:
an annular body lacking an internal water jacket void, and defining a longitudinal axis, a radial direction perpendicular to the longitudinal axis, a circumferential direction, a first longitudinal end, a second longitudinal end, and a liner length measured from the first longitudinal end to the second longitudinal end along the longitudinal axis, the annular body including a shoulder that is disposed at the first longitudinal end, defining a shoulder axial thickness measured along the longitudinal axis; and the annular cylinder liner further include a radially thin portion disposed at the second longitudinal end, the radially thin portion defining a thin radial thickness measured along the radial direction ranging from 3.0 mm to 5.0 mm, and the shoulder axial thickness ranges from 6.0 mm to 12.0 mm.

28 . The annular cylinder liner of claim 27 further including an outer circumferential surface that defines a large diameter portion disposed axially adjacent the shoulder, and the shoulder protrudes a radial distance measured along the radial direction from the outer circumferential surface that ranges from 3.0 mm to 7.0 mm.

29 . The annular cylinder liner of claim 28 wherein a ratio of the liner length to the shoulder axial thickness ranges from 24.0 to 46.0.

30 . The annular cylinder liner of claim 29 wherein the liner length ranges from 246.0 mm to 271.0 mm.

31 . The annular cylinder liner of claim 30 further defining an inner bore that extends from the first longitudinal end to the second longitudinal end.

Assignees

• Caterpillar Inc

Inventors

• Zhang Shu
• Cervantes Miguel M
• Perkins Scott David
• Cummins Andrew James

Classifications

• F02F1/004 Primary

  Cylinder liners (F02F1/08, F02F1/16 take precedence) · CPC title

• F02F1/4285

  of both intake and exhaust channel · CPC title

• F02F1/242

  Arrangement of spark plugs or injectors · CPC title

• F16F15/283

  for engine crankshafts · CPC title

• F16C7/023

  for piston engines, pumps or the like · CPC title